Individual Manufacturer’s Instruction Servicing Schedule.......................................................1Fluid System Drain and Purge..................................................................................................1
FLUID SYSTEM DESCRIPTION .........................................................................................................2
A ENSURE DEICER BODY ACCESS DOORS ARE FIRMLY SECURED IN THE OPEN POSITION WHEN ACCESSING CONTROLS AND EQUIPMENT.
1. INTRODUCTION
Periodic maintenance procedures for the TRUMP Modular Deicer are outlined in tabular form in this section.Frequency requirements for each operation are given in running hours and in calendar time when applicable.A separate Lubrication and Refill Chart is provided for easy reference.
A. Individual Manufacturer’s Instruction Servicing Schedule
(1) Servicing of vehicle engine and running gear should be done in compliance with manufacturer’s recommended schedule.
(2) Servicing of auxiliary engine and chassis engine components should be done in compliance with manufacturer’s schedule.
(3) Heater Servicing - Refer to paragraph 3 and paragraph 4 of this chapter. Further servicing and investigation of specific problems not covered in these paragraphs should be performed by a qualified service technician.
(4) Deicing and Anti-icing pump servicing - The pumps should be serviced as recommended by Myers and Hardi.
(5) Automatic Fire Extinguishing System (Optional) - The fire extinguishing system is an Ansul, Dry Chemical, A-101 and should be serviced as recommended by Ansul.
B. Fluid System Drain and Purge (See Section!-2 , para. 15. DRAIN/PURGE PROCEDURE)
SECTION 1. SERVICING2-1
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«M C SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
2. FLUID SYSTEM DESCRIPTION
A. Deicing Fluid Delivery Pump
Located in the right hand side compartment, this pump circulates fluid through the heater and maintains a constant system pressure. This pressure is regulated by the pump speed and the system relief valve located on the heater outlet manifold. The pump supplies sufficient flow of hot fluid to both the ground reel nozzle and the basket Deicing nozzle.
The Deicing pump is an iron bodied, two stage centrifugal pump incorporating a mechanical shaft fluid seal. The pump is supported by grease lubricated ball bearings and requires little maintenance. Power is supplied by an hydraulic motor attached to the pump shaft through a soft coupling. The pump speed is relatively constant and can be changed or adjusted with a flow control valve located on the main hydraulic manifold.
B. Anti-Icing Delivery Pump
Located in the left hand side compartment. This pump will deliver anti-icing fluid to the basket nozzle on demand. This pump is set to a maximum flow rate of 15 (56.5 liters/min) to 30 gpm (113.5 liters/min) to reduce fluid damage during passage through the nozzle. Flow rate is variable up to the maximum setting and is controlled by the nozzle valve. A fully open nozzle is recommended for anti-icing operations with the pump speed set to control a “NOT TO EXCEED” flow rate. The pump is an iron bodied radial design incorporating six diaphragm chambers operating in a parallel flow path. Each chamber includes an inlet and outlet check valve controlling the flow direction through the pump. The diaphragms are operated by push rods connected to a cam on the drive shaft. This arrangement allows the pump to run either direction without affecting the direction of the fluid through the pump. Power is supplied by a hydraulic motor attached to the back of the pump bracket and connected with a 3 - jaw soft coupling. The pump “NOT TO EXCEED” flow rate of 15-30 gpm is controlled by the motor speed. The motor speed can be changed by adjusting an hydraulic flow control valve located on the main hydraulic manifold attached to the pedestal in the rear engine compartment. Optionally, this pump can be used to refill the anti-icing fluid reservoir as a suction refilling station. When used as a refill station, additional hydraulic valves are supplied to allow a faster pump speed for refilling at up to 60 gpm. Additionally, a speed sensor can be added to this pump to supply a remote signal readout to indicate the volume of anti-icing fluid delivered.
C. Anti-Icing Fluid Delivery Counters (optional)
The use of high volumetric efficiency fluid pumps allow a simple way of measuring nominal fluid delivery. When installed, a simple high speed sensor is attached to a delivery pump and counts pump revolutions. This data is sent to a counter head located at a remote location, usually the driver’s compartment. The counter data is converted to US gallons or liters and displayed on a digital readout. The display unit includes a reset button for tracking a single aircraft deicing operation or can be used for total fluid dispensed over any period required. When used in conjunction with a station refiller, the volume of fluid transferred can be tracked.
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
D. Ground Reel & Nozzle
Located in the forward left side compartment, the reel supplies deicing fluid through a standard 50 ft. (15.2 m) hose and nozzle. The nozzle is non-adjustable and incorporates a pistol grip with lever to open the internal valve. Delivery flow rate is controlled by the valve lever. When fully depressed, it will deliver approximately 25 US gpm (113 liters/min) Others nozzles may be installed and usually operate in a similar fashion. A hand crank is supplied to assist in rewinding the hose after use. The reel may include an optional electric motor to speed rewinding. When equipped with a motor, a switch is located ahead of the reel for actuation.
E. Deicing Nozzle (Basket)
A nozzle is supplied that allows the operator to dispense deicing fluid in any reasonable direction from the basket. It is normally a hand held pistol grip type with an open-close lever on top and equipped with a selector ring for different flow rate settings. The nozzle is connected to a hose extending from the aerial boom allowing the operator to move freely. The deicing fluid flow rate is variable and controlled by a nozzle valve opening and ring setting, when fully open, approximately 60 US gpm (227 liters/min) is available. Various nozzles may be installed for different situations, or they may be mounted on rigid plumbing (turret). A holster or receptacle is provided for hand held nozzles and includes a rubber hold down latch.
F. Anti-Icing Nozzle (Basket)
When an anti-icing system is installed, a small hand held nozzle is located in the basket. This may be an FMC 785 style gun with a pistol grip and a trigger controlled valve. This nozzle is connected to a hose extending from the aerial boom and allows the operator to move freely. The 785 nozzle allows a delivery rate up to 25 US gpm (113 liters/min). Other nozzles may be supplied for this operation and operate similarly. A fully open nozzle will generally reduce fluid damage during anti-icing operations. A holster or receptacle is provided and includes a rubber hold down latch.
G. Fluid Reservoir
This reservoir will hold a maximum of 1200 US gallons (4540) liters) combined deicing or deicing and anti-icing fluid. The tank is constructed from stainless steel with access covers for cleaning. The forward sections contain deicing fluid and the aft section will contain anti-icing fluid when included. The tank outlet ports include gate valves for service and 1/4 turn ball valves for refill and drains. The forward compartment contains a sump for maximum fluid usability. A side mounted port and valve is supplied for rapid draining of the deicing fluid and a similar valve is supplied for the aft anti-icing tank when appropriate.
H. Heater Inlet Manifold
Located in the right hand side compartment extending forward of the heater. This manifold transfers fluid from the deicing pump to the heater and contains several temperature switches to monitor incoming fluid for heater operation. A pressure gauge and a temperature gauge is installed. An additional port is present for an optional remote temperature sender.
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•FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
I. Heater Outlet Manifold
Located at the rear of the heater under the burner assembly. This manifold contains a flow switch, pressure gauge, temperature gauge, temperature cycle switch and over temperature switch. The flow switch monitors fluid flow through the heater and will not allow the heater to operate if insufficient flow is detected. The cycle switch modulates the burners to keep the outlet temperature as even as possible. The heater over temperature switch will turn the heater off if the outlet fluid becomes too hot. A manual reset button is supplied and the heater cannot be restarted until it has been reset. A system relief valve is attached to this manifold and regulates the Deicing system pressure.
J. Deicing Fluid Flow Switch & Timer
Located at the base of the pedestal and near the heater, this flow switch will monitor deicing fluid delivery. If fluid flow is detected, the delivery pump will continue to run. If fluid flow stops, a timer is activated and will count down for two minutes after which the delivery pump will stop. If fluid flow is detected anytime during the two minute period, the timer will reset and wait for another no flow condition. If the pump stops, it can be restarted by actuating a switch in the basket.
K. Deicing Refill Stations For Suction Refilling
A deicing fluid refill station is installed just forward of the deicing pump located in the right side compartment. This station allows an external pressurized or non-pressurized fluid to be pumped into the deicing reservoir. A switch is located near the external hose connection to start the pump for suction refilling.
L. Anti-Icing Refill Station For Suction Refilling
An Anti-Icing refill station is installed on the anti-icing pump located in the left side compartment. This station allows an external pressurized or non-pressurized fluid to be pumped into the anti-icing reservoir. A lever is located on top of the pump manifolds to direct the fluid to the reservoir. A switch is located near the external hose connection to start the pump for section refilling.
M. Deicing Pressure Fill Station
Located in the left side compartment, aft of the ground reel, this port normally serves as a rapid drain for the deicing fluid. When quick connect type hose couplings are installed, the deicing reservoir can be filled from any pressurized source.
N. Fluid Thermal Relief Valve
A small relief valve is attached to the anti-icing pump. This valve relieves the fluid thermal pressure rise when the unit is not in operation.
O. Heater Safety Relief Valve
This valve is located in the heater inlet manifold and is for the explicit purpose of relieving a rapid pressure rise if other heater safety systems fail to operate. This valve is sometimes required by local or other safety regulations.
P. Pressure Gauges
A pressure gauge is located on the heater inlet manifold and on the heater outlet manifold. These gauges indicate system pressure at that point and are used for adjustment and service.
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
Q. Heater Outlet Temperature Gauge
Mechanical temperature gauges are installed in the heater inlet and outlet manifolds. They indicate the fluid temperature at that point and are used for adjustment and service.
R. Rotator Fluid Swivels
A rotary swivel is located in the rotator to transfer deicing fluid from the lower chassis plumbing to the rotating aerial boom and basket. A similar swivel is included when an anti-icing system is present. They can be easily removed for servicing. Grease zerks are installed for periodic lubrication.
S. Test Ports On Pump Outlet Manifolds
Test ports are present on the heater inlet and outlet manifolds as well as the delivery pump manifolds for external pressure or temperature sensing. They are plugged for normal operation.
3. INSPECTION SCHEDULES
INSPECTION SCHEDULES TABLE 1 - VEHICLE
MAINTENANCEPERIOD IN HOURS
8 SO 100 200 OTHER
Perform truck chassis and engine checks per manufacturers instructions.
: 6 Months
INSPECTION SCHEDULES TABLE 2 - HYDRAULICS
MAINTENANCEPERIOD IN HOURS
0 so 100 200 OTHERCheck hydraulic reservoir level. With boom stowed, check that fluid is visible in sight tube (aft side of reservoir).
X 6 Months
Check hydraulic pump for operation. X X X Yearly
Test emergency hydraulic pump for operation. X X X
Check fittings, hoses and oil lines for leaks. X X X Yearly
Test downward creep of the aerial device with 300 Lbs. (136 Kg.) in basket. (0 creep allowed)
X Yearly
Change hydraulic oil. X Yearly
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•FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
INSPECTION SCHEDULES TABLE 2 - HYDRAULICS
MAINTENANCE
PERIOD IN HOURS8 m \ 100 208 OTHER
Clean out hydraulic reservoir. Yearly
Replace hydraulic reservoir breather. X Yearly
Replace main pump case drain filter. X Yearly
Verify system pressure 2800 psi at compensator, 3100 psi at main relief valve, and 350 psi standby.
X Yearly
Verify that all hydraulic controls are operational from basket and ground control station.
X X X Yearly
Check boom lower, raise and rotation relief valves per Section 2-4, Adjustment and Test.
6 Months
INSPECTION SCHEDULES TABLE 3 - DEICING FLUID SYSTEM
MAINTENANCE
PERIOD IN HOURS
8 so \ 100 200 OTHER
Purge fluid system. As Required
Verify Deicing pump fluid pressure 180 -200 psi. X X X Yearly
Clean inside tank screen. X Yearly
Drain Deicing tank and inspect interior. Check for cracks in tank walls, baffles, or exhaust duct. Open drain valve and flush out all sludge or contamination.
6 Months
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
INSPECTION SCHEDULES TABLE 4 - ANTI-ICING FLUID SYSTEM
MAINTENANCEPERIOD IN HOURS
a so too 200 OTHER
Verify Anti-icing nozzle fluid pressure is approximately 50 psi.
X X X Yearly
Clean inside tank strainer X Yearly
Drain Anti-icing tank. X X Yearly
Grease Anti-icing pump. X X Yearly
Check hydraulic motor / Anti-icing pump coupling. X X Yearly
Check reel hose nozzle for flow rate and spray pattern operation.
X 6 Months
INSPECTION SCHEDULES TABLE 5 - AUXILIARY ENGINE
PERIOO IN HOURSMAINTENANCE i 8 so 100 200 OTHER
Check oil level. X X
Check Coolant level. X X
Check battery fluid level. X X X Yearly
Clean crank case ventilation system. X Yearly
Check oil bath air cleaner X Yearly
Clean and refill oil bath air cleaner X Yearly
Change engine oil. X Yearly
Change crank case oil filter. X Yearly
Check and adjust fan, alternator, and governor belts as specified in engine manual.
X X Yearly
Clean, test and regap spark plugs. X Yearly
SECTION 1. SERVICING2-1
Page 7Feb. 97
•FMC SMD-1200 MODULAR DEICERAIRUNE EQUIPMENT
INSPECTION SCHEDULES TABLE 5 - AUXILIARY ENGINE
PE RIOD I N HOURSMAINTENANCE # m \ 100 200 OTHER
Replace fuel filter element. X Yearly
Adjust valve tappets as needed. As needed
Check fuel system for leaks. X 6 Months
Check coolant condition. Flush system as required by engine manufacturers specifications.
6 Months
Clean and inspect PCV valve. Insure full movement of valve and replace if unserviceable.
6 Months
Check carburetor and choke linkage. 6 Months
Check hoses and lines. 6 Months
Check engine mounting bolts. 6 Months
Check engine RPM for proper idle (1000) and high throttle settings (1900-2000). Refer to section 2-4, paragraph 4. B. for adjustment procedure. *
6 Months
Check engine performance with engine analyzer. 6 Months
Clean battery 6 Months
Clean Auxiliary engine, engine compartment and radiator. 6 Months
2-1Page 8 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
INSPECTION SCHEDULES TABLE 6 - AERIAL DEVICE
PERIOD IN HOURSMAINTENANCE 8 50 m — OTHER
Test stability of complete device. Yearly
ROTATORGrease rotator assembly
X X Yearly
Check for 360° rotation. X X X Yearly
Grease all pins on rotator. X X Yearly
Check for damage and pin wear. X X X Yearly
KNUCKLEGrease all pins in knuckle
X X Yearly
Check for hose wear or damage. X X Yearly
MAIN BOOMGrease boom cylinder pins and basket pin.
X X Yearly
Check for damage and pin wear. X X Yearly
Grease pins. X X Yearly*?.
SECTION 1. SERVICING2-1
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«M C SMD-1200 MODULAR DEICERAIRUNE EQUIPMENT
BEARING TO PEDESTAL BOLTS (18X) 170 FT-LBS (23.5 KG-M)
Check that flow rate and pattern adjustments on basket nozzles function with auxiliary engine at ’’High Throttle”.
6 Months
Check for fluid leaks. X X Yearly
Ensure nozzle shutoff valves do not leak. 6 Months
Check intercom for proper function. 6 Months
Operate boom to full limits of travel from both basket and ground control station. Check for sticky or binding joystick / valves or sudden boom movement, indicating air in hydraulic system.
6 Months
Check that all valves spring return to center ’’OFF” position after actuation in either direction.
6 Months
Re-torque bolts attaching rotator weldment to bearing to 85 Ft.-Lbs. (11.75 kg- m) (Ref. Figure 1)
Yearly
Re-torque bearing to pedestal bolts to 170 Ft.-Lbs. (23.5 kg- m) (Ref. Figure 1)
NOTE: Initial check upon delivery.
Yearly
Re-torque pedestal base plate bolts to 320 Ft.-Lbs. (44.2 kg- m) (Ref. Figure 1)
Yearly
Check rotator drive (see Section 2-4 for adjustment procedure) and re-torque attachment bolts to 90 F t- Lbs.(12.45 kg-m). (Ref Figure 1)
Yearly
SECTION 1. SERVICING2-1
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■FMCAIRUNE EQUIPMENT
SMD-1200 MODULAR DEICER
Figure 2 HEATER CHECKS
INSPECTION SCHEDULES TABLE 7 -HEATER
PERIOD IN HOURSMAINTENANCE 8 SO 100 200 OTHER
Check that auxiliary engine accelerates to between 2000 and 2200 RPM when heater is turned on.
If RPM is out of limits:• Diesel engine - Contact engine manufacturer.• Gas engine - See Section 2-4 for adjustment.
X Yearly
Check that fluid flow switch (2FLS) is open at engine idle and closes when heater is turned on. (Ref. Figure 2)
X Yearly
Check flame sensor (1FLSR). (Ref. Figure 2)• Remove and expose sensor tip to bright light.• "PREMATURE FLAME” light should come on when the
heater is switched on.• Refer to section 2-4 for adjustment procedures.
Yearly
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
INSPECTION SCHEDULES TABLE 7 -HEATER
PERIOD IN HOURSMAINTENANCE { j 8 m |108 208 OTHER
Check’’MISFIRE” light.• Disconnect wires form the Stage 1 fuel valve solenoid
(19S0L). (Ref. Figure 2)• The "MISFIRE” light should come on 35 seconds after
the heater is switched on.• Reconnect wires.
Yearly
Check Over Temp, switch (6TAS) (Ref. Figure 2)• Remove and expose probe to temperature above 230°
F (110° C).• Switch should close.
Yearly
Check fuel valve solenoids as follows:• Fill fluid tank with a few hundred gallons (liters) of cold
fluid.•Turn on heater. After 30 second pre-purge period, volt
age will be seem at stage one fuel valve solenoid (19SOL) and heater will initiate combustion. At successive five second intervals voltage will be seen at stage 2 fuel valve solenoid (20SOL), stage 3 fuel valve solenoid (21 SOL), and stage 4 fuel valve solenoid (22SOL).. (Ref. Figure 2)
• Fuel valves should also be checked by viewing in the four sight glasses to verify the stage is firing when the voltage is applied to it
Yearly
Check air switch and blower speed.• Refer to section 2-4 for check and adjustment proce
dures
X Yearly
Check ignition coil with large capacity voltmeter. (Coil is rated at 20,000 volts.)
Yearly
Replace fuel filter element.• Fuel filter is connected to the burner head fuel manifold.
• Disconnect fuel tube from filter canister; disassemble canister and replace filter element.
X Yearly
SECTION 1. SERVICING2-1
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«M C SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
INSPECTION SCHEDULES TABLE 7 -HEATER
PERIOD IN HOURS
MAINTENANCE S SO ! 100 200! OTHER
Clean fuel nozzle strainers.• Remove burner assembly from heater.• Remove and disassemble nozzles to clean strainers.
Yearly
Check fuel pressure.• Refer to section 2-4 for check and adjustment proce
dures.
X Yearly
Check ignition electrode gap.• Refer to section 2-4 for check and adjustment proce
dures.
Yearly
Check fluid temperature gauges.• Refer to section 2-4 for check and adjustment proce
dures.
Yearly
Check fluid temperature switches.• Refer to section 2-4 for check and adjustment proce
dures.
X Yearly
Clean exhaust screen.• Remove heater exhaust screen and clean with hot
soapy water.
X Yearly
Clean condensation drain.• Remove plug on bottom of heater near burner end.
Make sure pipe is clear of any blockage and allow to drain completely.
• Re-install plug.
X Yearly
Clean carbon buildup from burner assembly.• Remove burner assembly for heater. Use small wire
brush to clean any carbon build up from all parts of the burner. Pay particular attention to the area around the electrodes on stage 1.
X Yearly
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
INSPECTION SCHEDULES TABLE 7 -HEATER
PERIOD IN HOURSfilAlNTEMANCE................................................................................ i............... 9 so 100 200 OTHER
Clean carbon buildup from coils.• Remove burner assembly.• Inspect interior of heater through air inlet tubes.• Remove any carbon buildup with wire brush and
vacuum.• Check coils for any sign of heat damage or leakage.• Re-install burner assembly.
Yearly
Check blower assembly.• Check blower wheel and housing for signs of wear,
cracks, or loose fasteners. Be sure inlet is securely attached.
Yearly
Check exhaust duct.• Inspect exhaust duct for cracks and loose fasteners.
Yearly
Clean interior of fluid coil.• See (aaragraph 4., Descaling Deicing Unit Heating Coils
Yearly
Check heater for leaks.• Inspect heater for hydraulic fluid, fuel, or deicing fluid
leaks.
X Yearly
Check built-in fire extinguisher system per the maintenance section of the Ansul manual.
6 Months
With the auxiliary engine shut down, place the "EMERGENCY HYDRAULIC PUMP” switch in the ”ON” position and ensure the joystick may be used to lower the boom.
6 Months
With the auxiliary engine shut down,Check cab and ground control station "EMERGENCY HYDRAULIC PUMP” switches and boom lowering controls for proper operation.
6 Months
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«M C SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
LUBRICATION AND REFILL CHARTITEM DESCRIPTION SPECIFICATION REFILL WEEKLY 200
HOURSSEASONAL (6 MONTHS)
1 Friction Points SAE 30 A few drops
X
2 Grease Fittings NLG1 no. 2 EP Multi - purpose
Asrequired
X
3 Hydraulic Fluid DTE-11 50 US Gal. Check Check Check4 Rotator Bearing and
GearNLQ1 no. 2 EP Multi-purpose
Asrequired
X
5 Rotator Drive SAE 140 EP AGMA 7 EP
1 US Gal. Check
6 Deicing Pump (Hardi 462)
Dow Corning no. 44 1/2 oz. X X X
7 Anti-icing Pump (Hardi 462)
Dow Corning no. 44 1/2 oz. X X X
A WARNING NEW HARDI #462 REPLACEMENT PUMPS ARE SUPPLIED DRY (UNLUBRICATED) FROM THE MANUFACTURER. REPLACEMENT PUMPS SHOULD BE FILLED WITH 32 OZ. OF GREASE BEFORE OPERATION.
NOTE: For auxiliary engine lubrication and maintenance, refer to the engine manufacturer’smanual.
1. Lubricate all friction points with SAE 30 oil at the beginning and end of the deicing season.
2. At the beginning and end of each deicing season, fill all grease fittings with NLG1 no. 2 EP Multi - purpose grease until a full ring of grease is visible coming out of the joint.
3. Check hydraulic fluid level daily. Add oil as required. Check daily for leaks and repair if required.
4. At the beginning and end of each deicing season, fill all grease fittings with NLG1 no. 2 EP Multi - purpose grease until a full ring of grease is visible coming out of the joint.
5. Check rotator drive oil cup daily. Add AGMA 7 EP SAE 140 EP gear oil as required.
6.. The Hardi 462 diaphragm Deicing pump requires 1/2 oz. (14 g.) of Dow Corning no. 44 grease every five hours of operation, and at the beginning and end of the deicer season.
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
4. DESCALING DEICING UNIT HEATING COILS
A. Materials
(1) Hydrochloric Acid - Technical Grade, 20° F (-7° C) Baume at 60° F (15.5° C)
(2) Inhibitor - Turco Acryle or Kelite
(3) Sodium Bicarbonate - Commercial grade
NOTE: Purchase Items 1 and 3 from any local chemical supplier. Contact local representativeof Turco or Kelite companies for item 2.
B. Preparation of Solutions
(Approximately 35 gallons [132.5 liters] are required to fill each heater coil).
I CAUTION k AVOID SKIN OR EYE CONTACT WITH HYDROCHLORIC ACID. IF SKIN CONTACT OCCURS, WASH OFF IMMEDIATELY AND THOROUGHLY WITH CLEAN WATER. IF EYE CONTACT OCCURS FLUSH WITH PLENTY OF WATER FOR AT LEAST 15 MINUTES. WEAR RUBBER GLOVES TO PROTECT SKIN......................
(1) Inhibited 20% Hydrochloric Acid Solution
(a) For each five gallons (19 liters) of final solution, mix in the following order:
1) Four gallons (15.5 liters) of tap water
2) One gallon (3.9 liters) hydrochloric acid
3) One pint (.47 liters) of inhibitor
4) Stir slowly and maintain the solution at room temperature when cleaning.
(b) Fill each coil with acid solution. The same batch of acid solution may be used to clean two coils.
SECTION 1. SERVICING2-1
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•FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
V *(2) Sodium Bicarbonate Solution
(a) For approximately five gallons (19 liters) of final solution, mix in the following order:
1) Five gallons (19 liters) of tap water
2) Three pounds (1.36 kg) of sodium bicarbonate
3) Stir slowly and thoroughly to dissolve the sodium bicarbonate and use the solution at room temperature.
(b) Fill each coil with neutralizing solution. The same batch of neutralizing solution may be used to neutralize two coils.
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
Section 2. Troubleshooting
A WARNING ANYTIME THE AERIAL DEVICE IS EXTENDED FOR MAINTENANCE PURPOSES, IT MUST BE SUPPORTED.
TROUBLESHOOTING
TROUBLE PROBABLE CAUSE REMEDY
VEHICLE CAB
Windshield wiper inoperative Wiper restricted by ice or other obstruction.
Circuit breaker
Wiper motor failure
(Optional)Tank level indicators inoperative
Sender failure
Broken sender wire
Gauge failure
AUXILIARY ENGINE
Engine does not crank Emergency Stop switch activated
Fire Extinguisher switch activated
Start Enable switch not held in "NORMAL” prior to starting
Engine circuit breaker
Weak battery(s)
Engine cranks, but does not start.
Out of fuel
Engine not preheated (diesel engine)Engine not primed (gas engine)
SECTION 2. TROUBLESHOOTING2-2
Page 1Feb. 97
■FMCAIRLINE EQUIPMENT
SMD-1200 MODULAR DEICER
TROUBLESHOOTING
TROUBLE PROBABLE CAUSE REMEDY
AUXILIARY ENGINE
Fuel circuit breaker (diesel engine)
Ignition circuit breaker (gas engine)
Engine starts, but does not run Low oil pressure
Hydraulic oil over temperature
Engine over temperature
Run solenoid fuel circuit breaker (diesel engine)
"CHOKE SET’ timer and pull- in module malfunction
Low idle solenoid (gas engine)
Engine does not idle at 1000 RPM
"CHOKE SET” timer and pull- in module malfunction (gas engine)
Low idle solenoid (gas engine)
Governor (diesel engine)
Engine does not come up to 2000 RPM when heater starter or pump is on.
Hi throttle relay
Hi throttle solenoid (diesel engine)
Pull-in module (gas engine)
HEATER MODULE
Heater enable ’’GREEN” light does not illuminate when heater is started.
Defective bulb
Fluid temperature is above 180° F (82° C)
- 180° F (82° C) Tank temperature switch misadjusted or inoperative
Loose wiring between Heater switch and light
Heater enable ’’GREEN” light stays on, but flame "WHITE” light never illuminates.
Fluid tank is empty
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SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
TROUBLESHOOTING
TROUBLE PROBABLE CAUSE REMEDYHEATER MODULE
Heater "OVERTEMP” switch tripped (must be reset)
If heater panel "NO FLOW” light is ”ON”: Flow switch or Flow Bypass Timer malfunction
If heater panel "PURGE” light is "ON": Blower malfunction - Incorrect blower speed or blower inoperative
Air switch improperly adjusted or inoperative
Start Delay Timer and Relay malfunction
Heater Exhaust Stack Temperature switch tripped (must be reset)
If heater panel "PREMATURE FLAME” light is "ON": Flame Sensor or Flame Module malfunction
Flame "WHITE” light illuminates for approximately five seconds then goes out.
Flame Sensor improperly adjusted or inoperative < f ,v .
Flame Module malfunction
partial spark (due to improper gap) or no spark
Blower malfunction - Incorrect blower speed or blower inoperative
Low fuel pressure or no fuel flow
Heater runs but is slow to heat If any of the four heater stages do not come on: Heater Inlet manifold Temperature switch(s) improperly adjusted
Adjust heater inlet temperature switches.
Low fuel pressure
Low fluid flow
SECTION 2. TROUBLESHOOTING 2-2Page 3
•FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
TROUBLESHOOTING
TROUBLE PROBABLE CAUSE REMEDY
HEATER MODULE
Heater Misfires (heater flame lost prior to reaching 180° F (82° C) tank temperature)
Blower malfunction Incorrect blower speed or blower inoperative
Premature flame (if misfire occurs prior to running)
Low fuel pressure or no fuel flow
Low fluid flow
HYDRAULIC SYSTEM
Loss of hydraulic power Relief valve mis-adjusted (should be set at 3100 psi)
Compensator mis-adjusted or inoperative
(should be set at 2800 psi)
Main hydraulic pump failure
Blowers not at 4900 +200, -0 RPM during stage 2 & 3 burn
Flow control valves mis-adjusted Adjust flow control valve.
Stand-by pressure mis-adjusted
Pump damaged
Motor damaged
Loss of aerial device rotation Motor failure
Relief valve mis-adjusted Adjust relief valve
Unable to lift boom Boom raise relief valve failure
Boom cylinder piston seal failure
Boom creeps down Holding valve leaking
Emergency lowering needle valve leaking
Internal boom cylinder leaking
Boom will not lower
idT
Boom lowering relief valve set too low
Adust relief valve
Boom moves from manual le v y K ers, but not from basket. / J Boom circuit breaker (main junc
tion box) —=---------
Joystick trigger switch not depressed —--------- . J
Boom relief valve malfunction
2-2Page 4Feb. 97
MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
TROUBLESHOOTING
TROUBLE PROBABLE CAUSE REMEDY
HYDRAULIC SYSTEM ~~------ ------—
Boom valve spool sticking \Manual boom lever door open engaging boom lockout (option) )
Loss of all aerial device operation
Dump valve malfunction (Override valve by pushing manual override button on the end of the valve, turn ccw and release)
Boom Enable Valve malfunction (Override valve by pushing manual override button on the end of the valve, turn ccw and release))
Failure of any deicing fluid drive Incorrect pressure flow settings (see Adjustment, section 2-4)
Hydraulic motor failure
Valve solenoid coil malfunction
SECTION 2. TROUBLESHOOTING2-2
Page 5/(6 blank)Feb. 97
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
Section 3. Removal And Installation
1. HEATER REMOVAL
A. .Remove rear half of Deicer shroud.
B. Disconnect fuel lines to heater.
C. Disconnect hydraulic lines to blower motor.
D. Disconnect hydraulic lines to fuel pump motor.
E. Disconnect all wiring harnesses to heater.
F. Close fluid inlet and outlet valves to heater.
G. Disconnect groove couplings on heater inlet and outlet piping.
H. Disconnect bolts attaching heater to floor.
I. Position forks of lift truck in slots provided in heater frame and remove heater from deicer. Lift truck minimum capacity should be 2 tons (.90721).
2. HEATER INSTALLATION
A. Position forks of lift truck in slots provided in heater frame and lift heater onto deicer. Lift truck minimum capacity should be 2 tons (.90721).
B. install bolts attaching heater to floor.
C. Connect groove couplings on heater inlet and outlet piping.
D. Open fluid inlet and outlet valves to heater.
E. Connect all wiring harnesses to heater.
F. Connect hydraulic lines to fuel pump motor. Motor must spin clockwise as viewed from shaft end.
G. Connect hydraulic lines to blower motor. Motor must spin clockwise as viewed from shaft end.
H. Connect fuel lines to heater.
I. Install rear half of Deicer shroud.
SECTION 3. REMOVAL AND INSTALLATION2-3
Page 1Feb. 97
«M C SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
3. HEATER COIL REMOVAL
BEFORE WORKING WITH INTERIOR OF HEATER, PROPER PRECAUTIONS SHOULD BE TAKEN TO AVOID SKIN CONTACT AND INHALATION OF THE FIBERS INSIDE THE HEATER.
A. Remove heater from unit. Refer to paragraph 1.
B. Remove grooved fittings that are screwed into inlet and outlet pipes of heater.
C. Remove circular clamp at front end of heater (end opposite the burner head).
D. Using handles provided, remove exterior end cap.
E. Remove insulation disks (2).
F. Grind the weld that holds interior end cap and remove cap.
G. Remove insulation disks (3).
H. Cut out outer sheet metal in front of the fluid inlet pipe (vertical pipe in bottom of heater) to allow pipe to slide out the end of the heater.
I. Remove heat deflector caps (2).
J. Slide coil weldment out of heater.
4. HEATER COIL INSTALLATION
A. Slide coil weldment into heater. Align fluid outlet pipe with hole in aft end (burner head end) of heater.
B. Weld filler plate in outer sheet metal around fluid inlet pipe (vertical pipe).
BEFORE WORKING WITH INTERIOR OF HEATER, PROPER PRECAUTIONS SHOULD BE TAKEN TO AVOID SKIN CONTACT AND INHALATION OF THE FIBERS INSIDE THE HEATER.
C. Fill ceramic moldable compound in spaces between coils in the end of the outer coil.
D. Install flame deflector caps. Fill any gaps with ceramic moldable compound.
E. Install insulation disks (2).
F. Install interior end cap and weld in place.
G. Install insulation disks (2).
2-3Page 2 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
H. Install exterior end cap.
I. Install circular clamp to hold in end cap.
J. Install grooved fitting into inlet and outlet piping.
K. Install heater into Deicer unit. Refer to paragraph 2.
5. BLOWER HOUSING REMOVAL
A. Remove bolts holding circular motor adapter plate to blower housing.
B. Slide motor / blower wheel assembly out of housing and set aside.
C. Remove bolt holding housing to burner head. Remove housing.
6. BLOWER HOUSING INSTALLATION
A. Position housing over rectangular hole in burner head and install bolts (6).
B. Insert motor blower wheel assembly into housing and install fasteners (8).
7. BLOWER MOTOR REMOVAL
A. Turn hydraulic valve off (located at hydraulic tank)
B. Remove hoses from blower motor and drain.
C. Remove blower guard from housing. Air inlet cone will also come off.
D. Loosen set screws in hub of blower wheel.
E. Slide blower wheel off motor shaft.
F. Remove mount bolts for blower motor and remove motor.
8. BLOWER MOTOR INSTALLATION
A. Install motor onto adapter plate of blower housing and secure fasteners. (Port ”B” should be toward rear.)
B. Slide blower wheel onto motor shaft. Be sure key is positioned under set screw in blower hub.
SECTION 3. REMOVAL AND INSTALLATION2-3
Page 3
«M C SMD-1200 MODULAR DEICERAIRUNE EQUIPMENT
C. Tighten set screws (2) in hub of blower wheel.
D. Install air inlet cone and blower guard onto housing. Air inlet cone points inward with cone edge even with edge of blower wheel. If not, reposition blower wheel on motor shaft. Tighten guard mount bolts (4).
E. Install hoses onto blower motor. Pressure hose is to be mounted to port ”B” of motor.
F. Turn hydraulic valve on. (located at hydraulic reservoir)
9. AERIAL DEVICE REMOVAL (REF. FIGURE 1)
A. Attach a chain around both sides of the tube that is supporting the upper ear- pivot on the rotator. Make adjustments of these chains to keep rotator base in horizontal position.
B. Put strap through the two 2 in. (50.8 mm) holes in the base plate of the rotator.
C. Wrap strap around both sides of the square tube that is on the end of the boom.
D. Connect the chain to an overhead lifting device with a minimum capacity of 2 tons (.9072 t). Position the lifting hook approximately at the location shown on Figure 1.
E. Disconnect the fluid lines at the base of the pedestal inside the engine compartment.
F. Disconnect the electrical connections at the rotator.
G. Remove 18 screws (bolts) from the bearing and base plate of the rotator.
10. AERIAL DEVICE INSTALLATION (REF. FIGURE 1)
A. Attach a chain around both sides of the tube that is supporting the upper ear- pivot on the rotator. Make adjustments of these chains to keep rotator base in horizontal position.
B. Put strap through the two 2 in. (50.8 mm) holes in the base plate of the rotator.
C. Wrap strap around both sides of the square tube that is on the end of the boom.
D. Connect the chain to an overhead lifting device with a minimum capacity of 2 tons (.9072 t). Position the lifting hook approximately at the location shown on Figure 1.
E. Lift the aerial device to the top of the vehicle. Align the rotator base over the pedestal.
F. Lower the boom onto the pedestal.
G. Torque the 18 screws (bolts) into the bearing in a criss-cross procedure to 85 Ft.- Lb.(11.75 kg-m)
2-3Page 4 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
H. Remove the chains and the straps.
I. Connect the hydraulic system.
J. Connect the fluid lines at the base of the pedestal inside the engine compartment.
K. Connect the electrical system inside the pedestal.
STRAP NO. 1LENGTH -284IN.(7213.6 MM MIN. CAPACITY-1654 LB (750 KG) 2 PLACES
CHAIN LENGTH -240IN.(6096 MM) MIN CAPACITY -1940LB (880 KG) 2 PLACES —
STRAP NO. 2 LENGTH-271 IN. (6883.4 MM)
7 IN. . (177.8 MM)
60 IN. — (1524 MM)
Figure 1AERIAL DEVICE, REMOVAL AND INSTALLATION
SECTION 3. REMOVAL AND INSTALLATION Page 5/(6 b|a2nk®Feb. 97
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
Section 4. Adjustment And Test
1. HEATER ADJUSTMENTS
A. Flame Detection System ( Ref. Figure 1)
(1) Unplug relays 23CR and 24CR inside Heater Control Box.
(2) Start engine.
(3) Turn on heater. Green LED on flame detector module should come on. If not, check wiring to flame detector (17CR, 8CR, 4TD etc.)
NOTE: During these tests it is important to remember that the module will only have power for50 seconds after heater is started. You may need to turn heater off / on again to get another 50 seconds, if required.
(4) If 12V is present at wire #211 but green LED is not on, check module wiring hookup for correct polarity. Wire #211 must be on “+” and wire #1 must be on
(5) When green LED is on, connect voltmeter to flame detector module as follows: Red lead to TP-1 on module and black lead to ground (wire #1).
(6) Voltage at TP-1 should be 3.5V to 4.0VDC. If not, adjust with trimpot. Turn clockwise to increase and counterclockwise to decrease.
(7) Turn heater off and move voltmeter red lead to TP-2 on module.
(8) Unscrew flame sensor from heater and point to a bright light source such as the sun or the end of a bright flashlight.
(9) Turn heater back on again to get a full 50 seconds test. The voltage seen at TP-2 now should be greater than 4.5 volts and the red LED should be on. You will also see the misfire and premature-flame light come on at the heater box.
(10) If voltage is less than 4.5V,. check to make sure the sensor is seeing bright light. If voltage is still less than 4.5V, check sensor wiring.
(11) If voltage at TP-2 is at least 4.5V, the red LED is not on, and the voltage on TP-1 is 3.5V to 4V, then change modules.
(1) Use a photo-tachometer to measure blower speed. If a photo-tachometer is not available, connect a manometer (Ref. Figure 2) or air pressure gauge capable of reading between zero and two inches of water to the burner head. A port is located on the burner head directly across from the air switch.
(2) Disconnect wire on “NO” and “C” contacts of 3PS and connect a continuity tester between terminals “C” and “NO” on air switch “3PS”. Without blower running, continuity should not be detected between these terminals.
2-4Page 2Feb. 97
MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
(3) At 18 SOL, disconnect wire no. 292 from the terminal. This disables high blower speed.
(4) Start auxiliary engine and allow it to warm up.
(5) Switch heater on, then immediately off. Blower will run for three minutes. Adjust blower speed during this period. Repeat this step if more time is needed.
(6) Adjust blower speed for 2500 RPM (0.5in. or 25.4mm on manometer) (Ref. Figure 2) Adjust by turning the adjustment screw on the Blower Low Speed flow control valve located on the pedestal mounted valve assembly (REF. Figure 5).
(7) Adjust screw in bottom of air switch “3PS” to point where continuity is first detected between terminals “C” and “NO”. Switch activation can be verified by turning the blower down to 2400 RPM to break continuity between the terminals.
(8) Reconnect wire on “NO” contact on air switch “3PS”.
(9) With wire no. 292 disconnected at valve, set low blower speed using flow control valve FC4) adjustment screw. Set in accordance with Blower Speeds Table on page five of this section.
(10) Reconnect wire no. 292 to activate high blower speed.
(11) Adjust high blower speed by turning the adjustment screw on the Blower High Speed flow « control valve (Ref. Fig. 4). Set in accordance with the Blower Speed Settings Table listed below.
BLOWER SPEED SETTINGS TABLEIf Oil Temp, is : Low Blower Speed High Blower Speed
°F °C RPM (in., mm of water RPM (in., mm of water)90 32.2 3100 0.70 in, 17.8 mm 4900 1.70 in, 43.2 mm100 37.7 3050 0.68 in, 17.2 mm 4850 1.67 in, 42.4 mm -110 43.3 3000 0.6 6 in, 16.7 mm 4800 1.64 in, 41.6 mm120 48.8 2950 0.64 in, 16.2 mm 4750 1.61 in, 40.9 mm130 54.4 2900 0.62 in, 15.7 mm 4700 1.58 in, 40.1 mm140 60.0 2850 0.60 in, 15.2 mm 4650 1.55 in, 49.4 mm
(12) Disconnect manometer (if used) and plug port.
SECTION 4. ADJUSTMENT AND TEST2-4
Page 3Feb. 97
•FMCAIRLINE EQUIPMENT
SMD-1200 MODULAR DEICER
Figure 2DESCRIPTION OF MANOMETER
A manometer is nothing more than clear plastic tubing in a ”U” shape, filled about half way with water (sometimes the water is dyed so it can be seen better.) The manometer can be connected to the port located on the heater burner head directly across from the air switch. When a fan or blower is running, it will move the water in the tube. The distance between the water columns is a measure of pressure change within the heater (this is known as ’’inches [or millimeters] of water displaced”). Thus, the manometer provides another means of measuring the air flow through the heater instead of using a tachometer to measure the speed of the fan or blower.
C. Fuel Pressure
(1) Diesel Engine
Fuel pump pressure is set at 315 psi static and 300 psi with all four stages firing. Verify that the fuel pump speed is 3450150 RPM. The fuel pressure can now be adjusted by first removing the access screw in the fuel pump and then turning the newly exposed set screw.
2-4Page 4 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRUNE EQUIPMENT
(2) Gasoline Engine
Refer to engine manufacturer’s manual.
D. Ignition Electrode Gap ( Ref. Figure 3)
(1) Remove the burner assembly from the heater.
(2) Gap is set between 0.125 in (3.175 mm) and 0.188 in (4.77 mm)
Rotate electrodes in holder to adjust.
E. Fluid Temperature Gauges
(1) Remove gauges from heater inlet and outlet plumbing and immerse in a container of water.
(2) Heat and compare gauge readings reliable mercury glass thermometer.
(3) Readings should be within three degrees.
.125 in TO .188 in
Figure 3 ELECTRODE GAP SETTING
SECTION 4. ADJUSTMENT AND TEST
-FMCAIRLINE EQUIPMENT
SMD-1200 MODULAR DEICER
Fluid Temperature Switches (Ref. Figure 4)
(1) Fill Deicing (Type I) fluid tank (hot fluid tank) with 400 gal. (1514 liters) of fluid.
(2) Set temperature switch ”6TAS” to 230° F (110° C).
(3) Remove the cover plates on temperature switches ”5TAS”, ”8TAS”, ”9TAS”, and ”1OTAS”# on the fluid inlet manifold, and ’’11TAS” located on the fluid outlet manifold.V',»
(4) With the adjustment knob on top of each switch, set the switches as follows:
10TAS - 120° F (49.0° C) 8TAS- 140° F (60.0° C) 9TAS- 160° F (71.0° C) 5TAS- 180° F (82.0° C) 11TAS - 195° F (90.5° C)
(5) Start auxiliary engine and allow to warm up.
2“ § MAINTENANCE / TROUBLESHOOTINGFeb. 97
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
(6) Start heater.
(7) Temporarily set temperature switch ”11TAS” on fluid outlet manifold to 210° F (99.0° C).
(8) Allow heater to run through a complete heat cycle.
(9) Using the temperature gauge located on the fluid inlet manifold, note the inlet temperatures when burner stages four through one turn off during the heat cycle. Watch the indicator lights to determine when the various burner stages turn off.
(10) If at anytime the outlet temperature rises above 210° F (99.0° C), turn off the heater, reset the temperature switches five degrees lower, and rerun the heat cycle.
(11) If the temperatures recorded during the heat cycle do not match the inlet switch settings, adjust the switch settings to match. For example, if stage 3 turned off with a fluid inlet temperature of 57° C instead of 60 ° C (switch setting), adjust the knob on ”8TAS” 3° C higher.
(12) If switches had to be changed more than three degrees Centigrade, rerun heat cycle to verify new switch points. '
(13) Reset temperature switch ’’11TAS” to 195° F (90.5° C).
(14) Verify ’’11TAS” is switching at 195° F (90.5° C) by watching the temperature gauge on the heater outlet manifold. Adjust if required.
2. HYDRAULIC SYSTEM ADJUSTMENTS (REF. FIGURE 5)
A. Main Hydraulic Pressure Adjustments
NOTE: The main pressure relief valve is located at the left corner of the top face of the integratedcircuit manifold.
The pressure compensator adjustment screw is the larger of two adjustment screws on the side of the hydraulic pump. Hydraulic oil should be at normal operating temperature
(1) Locate the pressure gauge that is at the right end of the manifold.
(2) Turn the compensator adjusting screw of the main pump counterclockwise to its minimum pressure setting stop.
(3) Turn the adjusting screw of the main relief valve clockwise to its maximum pressure setting.
SECTION 4. ADJUSTMENT AND TEST 2-4Page 7Feb. 97
•FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
(4) Remove the tube from port number #1 of the integrated Circuit manifold. Cap the fitting and plug the tube. Energize solenoid valve (16 SOL).
(5) Start the engine.
(6) Turn the pump compensator adjusting screw clockwise to 3000 psi.
(7) Turn the adjusting screw of the main relief valve counterclockwise to lower the pressure to^W -psi.
(8) Very quickly, turn the pump compensator screw counterclockwise to reduce its setting to 2@80 psi. Speed is essential for this step because the engine horsepower is being converted to heat in the hydraulic oil while the main relief is blowing.
(9) Stop the engine and reconnect the tube to port number #1.
B. Load Sensing Pressure Adjustment
NOTE: The load sensing adjustment screw is the smaller of two adjustment screws on the sideof the pump.
/"S .(1) With the auxiliary engine turned off, replace the 5000 psi pressure gauge og the front of (
the valve assembly with a 600 psi gauge.
(2) Remove the wire from the spade terminal of (9 SOL) Anti-Ice delivery solenoid valve. (Ref. Figure 5)
(3) Start the auxiliary engine.
I CAUTION L DO NOT OPERATE ANY FUNCTIONS WITH THE 600 PSI GAUGE INSTALLED, AS THE GAUGE WILL BE DAMAGED.
(4) Remove the acorn nut from the adjusting screw and loosen the jam nut.
(5) Turn the adjusting screw clockwise to increase or counterclockwise to decrease the load sense pressure until the gauge shows 300 psi, then tighten the jam nut and install the acorn nut.
(6) Stop the engine and reinstall the 5000 psi gauge.
2-4Page 8Feb. 97
MAINTENANCE / TROUBLESHOOTING
V /i - i /OO MODULAR DEICER •FMC
AIRLINE EQUIPMENT
ETHER START ELECTRCAL 622-8795
Figure 19 thru Figure 22UNITS
ITEM AIRLINE PERNO. PART NO. PART NO. NOMENCLATURE EFR ASSY.
C. Proportional (Boom) Valve Maximum Flow Adjustments (Ref. Figure 6)
NOTE: These adjustments are to be made with the auxiliary engine shut off.
(1) Loosen the jam nuts from the two adjusting screws on the face of each of the two proportional valve bodies.
(2) Turn each screw clockwise to its full in position, then turn each screw counter-clockwise (out) for the appropriate function as follows:
Function Flow Control Number Of Turns OutBoom Up FB 3/4Boom Down FA 3/4Boom Rotate CW FB 3/4Boom Rotate CCW FA 3/4
(3) Tighten the jam nuts.
D. Boom Lowering Relief Valve (Ref. Figure 6)
NOTE: The boom lowering relief valve is located under the boom valve assembly. The loweringrelief valve cartridge points to the rear of the truck. Before adjusting this relief valve, check to see that the load sense pressure is correctly set at 350 psi.
NOTE: An assistant is required for this adjustment.
(1) Lower the upper boom completely into the rest position.
(2) Loosen the jam nut.
(3) Have an assistant push and hold the boom lowering electrical joystick lever to power the upper boom down into its rest, while watching the pressure gauge for a correct reading of 1350 psi.
(4) Turn the adjustment screw clockwise to increase or counterclockwise to decrease the pressure to a gauge reading of 1350 psi. The relief will be correctly set at 1000 psi and the 350 psi load sense pressure will cause the gauge to show 1350 psi.
(5) Tighten the jam nut.
SECTION 4. ADJUSTMENT AND TEST ■.2-4Pages5'Feb. 97
-FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
MAIN PRESSURE
(POINTS DOWN)
BLOWER HIGH SPEED FLOW CONTROL VALVE
TYPE I FLOW CONTROL VALVE (LOWER)
FRONTVIEW
18SOL BLOWER RUN FAST
17SOL BLOWER RUN SLOW
BLOWER LOW SPEED FLOW CONTROL VALVE
14SOL BOOM VALVE LOAD SENSE DUMP
Figure 5INTEGRATED CIRCUIT MANIFOLD ASSEMBLY
2-4Page 10 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
E. Boom Raise Overload Relief Valve (Ref. Figure 6)
NOTE: This relief valve is located in the same body as the boom lowering relief valve under theboom valve assembly. The adjusting screw points to the front of the truck. Before adjusting this relief valve, check to see that the load sense pressure is correctly set at 350 psi.
NOTE: An assistant is required for this adjustment.
(1) Place a 500 pound weight in the basket with the boom in the rest position.
(2) Loosen the jam nut on the relief valve adjusting screw.
(3) Have assistant pull and hold the boom raise electrical joystick in the “raise” position.
(4) Turn the adjusting screw clockwise until the boom starts to raise, then turn the adjusting• • y screw counterclockwise 1/8 turn and lock the adjusting screw with the jamnut. ^
F. Upper Boom Counterbalance Valve
This counterbalance valve is built into the cap end of the boom cylinder. It is factory preset to the correct setting and is non adjustable.
G. Boom Rotation Clockwise Relief Valve (Ref. Figure 6)
This relief valve is located in the valve body at the front end of the Vja!ye b|nk assembly; £ It is located on the back of this body away from the valve levers. Befote adjusting this relief valve, check to see that the load sense pressure is correctly set at 350 psi. ;'.WV. :• ; !.• ;
Loosen the jam nut on the relief valve adjustment screw.r-
' ‘ •Start the auxiliary engine. j
Push in the first valve lever from the left to rotate the boom clockwise (to the right) to its extreme limit. * v
While holding the valve lever pushed in, turn the adjusting screw of the relief valve clockwise to increase or counterclockwise to decrease the pressure for a correct reading of 2450 psi on the pressure gauge. The relief valve will then be set at 2100 psi, but the 350 psi load sensing pressure will cause the gauge to show 2450 max. psi.
Tighten the jam nut.
NOTE:
(1)
(2)
(3)
(4)
(5)
SECTION 4. ADJUSTMENT AND TEST2-4
Page 11
•FMCAIRLINE EQUIPMENT
SMD-1200 MODULAR DEICER
PROPORTIONAL VALVE ADJUSTMENTS (FOUR ON FACE OF VALVE ASSEMBLY)
BOOM LOWERING PRESSURE ADJUSTMENT SCREW
CLOCKWISE ROTATION ADJUSTMENT
BOOM CLOCKWISE RELIEF VALVE
BOOM COUNTERCLOCKWISE RELIEF VALVE
COUNTERCLOCKWISE ROTATION ADJUSTMENT
BOOM RAISE PRESSURE ADJUSTMENT SCREW
BOOM LOWERING RELIEF VALVE AND BOOM RAISE OVERLOAD RELIEF VALVE
Figure 6 BOOM VALVE ADJUSTMENTS
•*h-
p ~ * e 1 2 MAINTENANCE/TROUBLESHOOTINGFeb.97
SMD-1200 MODULAR DEICER fM CAIRLINE EQUIPMENT
H. Boom Rotation Counterclockwise Relief Valve (Ref. Figure 6)
NOTE: This relief valve is located in the valve body at the front end of the valve bank assembly.It is located on the front or lever end of this body.
Before adjusting this relief valve, check to see that the load sense pressure is correctly set at 300
(1) Loosen the jam nut.
(2) Start the auxiliary engine.A ' :
; , : ; \(3) Pull the first valve lever from the left end of the proportional valve to rotate tlfpboom
counterclockwise (to the left) to its extreme limit.
(4) While holding the valve lever turn the adjusting screw clockwise to increase or counterclockwise to decrease the pressure for a reading of 2450 psi on the gauge. The relief valve will then be set at 2100 psi, but the 350 p$i load sensing pressure will cause the gauge to show 2450 psi. ' '
(5) Tighten the jam nut. 11
(6) Return the main relief valve setting to 2500 psi and the pump compensator setting to 2200 psi.
I. Deicing (Type I) Delivery Pump (Ref. Figure 5)
NOTE:
NOTE:
(1)
(2)
(3)
(4)
Deicing (Type I) fluid delivery pump. These valve cartridges are screwed into a sai valve body directly under 15sol. ...fc;.
A tachometer must be used to sense the speed of the drive coupling between ihe hydraulic motor and delivery pump. ,
Install a tachometer on the drive coupling of the delivery piimp.
Loosen the jam nut on the flow control valve adjusting screw.
Turn on the delivery system (15 SOL), with the liözzle completely open.
Turn one Flow Control valve adjusting screw completely clockwise and tighten the jam nut. fV '
SECTION 4. ADJUSTMENT AND TEST2-4
Page 13Feb. 97
-FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
(5) Turn the other flow control valve adjusting screw clockwise to increase or counterclockwise to decrease the pump speed until it is set at 3900 rpm and tighten the jam nut.
(6) Turn off the Delivery System.
(7) Remove the tachometer.
J. Anti-Icing Delivery Pressure
NOTE: Anti-Ice delivery pressure is regulated by a pressure reducing valve cartridge that is screwed into a sandwich valve located between the solenoid valve and the flow control valve. The adjustment screw is pointed down.
NOTE: An assistant is required for this adjustment.
(1) Loosen the jam nut on the adjusting screw of the pressure reducing valve.
(2) Turn on the Anti-Ice delivery system with the nozzle completely closed.
(3) Have an assistant read the fluid delivery gauge in the engine compartment.
(4) Turn the adjusting screw clockwise to increase or counterclockwise to decrease the pressure until the Anti-Ice fluid delivery gauge reads 80 psi and tighten the jam nut.
(5) Turn off the Anti-Icing (Type II) delivery system.
Anti-Ice / Refiller (Ref. Figure 5)■. %
NOTE: The flow control valve cartridge that controls the speed of the hydraulic motor that drives the Anti-Ice fluid delivery pump is screwed into a sandwich valve mounted on the hydraulic manifold (Behind Anti-Ice pressure reducing valve).
NOTE: A tachometer must be used to sense the speed of the drive coupling between the hydraulic motor and the Anti-Ice pump.
/
(1) Install a tachometer on the drive coupling of the Anti-Ice delivery pump.
(2) Loosen the jam nut on the Anti-ice flow control valve adjusting screw.(valve points down)
(3) Turn on the Anti-Ice delivery system (9 SOL), with the nozzle completely open.
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MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER fMC"''AIRLINE EQUIPMENT
(4) Turn the flow control valve adjusting screw clockwise to increase or counterclockwise to decrease the pump speed until it is set at 200 rpm and tighten the jam nut.
(5) Turn off the Anti-Ice delivery.
(6) Remove the tachometer.
L. Anti-Ice Tank Refill Flow Rate
NOTE: The needle valve cartridge that controls the speed of the hydraulic motor that drives theAnti-Ice fluid reservoir refill pump is screwed into a sandwich valve located on the surface of the hydraulic manifold assembly.
NOTE: A tachometer must be used to sense the speed of the drive coupling between thehydraulic motor and the Anti-Ice pump.
(1) Install a tachometer on the drive coupling of the Anti-Ice delivery pump.
(2) Loosen the jam nut on the refiller needle valve adjusting screw.(valve points up)
(3) Turn on the Anti-Ice tank refill system (8 SOL).
(4) Turn the refiller needle valve adjusting screw clockwise to decrease or counterclockwise to increase the pump speed until it is set at 600 rpm and tighten the jam nut.
(5) Turn off the refill system.
(6) Remove the tachometer.
M. Blower Low Speed Adjustment
NOTE: The flow control valve cartridge that controls the low speed operation of the blower fanis located on the right side of the face of the integrated circuit manifold assembly (Ref. Fig. 4).
NOTE: A tachometer must be used to sense the speed of the blower fan.
(1) Install a tachometer to sense the speed of the blower fan.
(2) Loosen the jam nut on the Blower Low Speed flow control valve adjusting sen
y ?—ASECTION 4. ADJUSTMENT AND TES% Page 15
•H -Ä Fib. 97
(3) Turn on the blower low speed drive (17 SOL).
(4) Turn the flow control valve adjusting screw clockwise to decrease or counterclockwise to increase the blower fan speed until it is set at 3100 rpm. (See Blower Speed Settings Table under paragraph “ B “ of this section).
(5) Tighten the jam nut.
(6) Turn off the blower.
(7) Remove the tachometer.
N. Blower High Speed Adjustment
NOTE: The flow control valve cartridge that controls the blower high speed is located on the faceof the hydraulic manifold assembly, just to the left of the Blower Low Speed flow control cartridge (Ref. Fig. 4).
NOTE: A tachometer must be used to sense the speed of the blower fan.
NOTE: The blower low speed must be properly adjusted before the high speed is adjusted.
(1) Install a tachometer to sense the speed of the blower fan.
(2) Loosen the jam nut on the adjustment screw of the Blower High Speed flow control valve.
(3) Turn on the blower high speed drive. (17 SOL and 18 SOL)
(4) Turn the flow control valve adjusting screw clockwise to increase or counterclockwise to decrease the blower fan speed until it is set at 4900 rpm and tighten the jam nut. (See Blower Speed Settings Table under paragraph “ B “ of this section).
NOTE: The emergency pump is located on the rear right comer of the power module assembly. The relief valve is integral to the emergency pump body.
(1) Loosen the jam nut from the relief valve adjusting screw.
NOTE: Make sure all valves are DE-energized.
(2) Turn on the emergency pump and very quickly adjust the relief valve until the pressure gauge shows 2500 psi, and immediately turn off the pump. While blowing the relief valve, the oil is generating heat inside the pump.
Fuel Pump Drive For Fluid Heater
NOTE: The flow control valve cartridge that controls the speed of the hydraulic motor that drives the fuel pump is screwed into a sandwich valve located at the surface of the hydraulic valve manifold. (Above16 SOL)
NOTE: A tachometer must be used to determine the speed of the drive coupling between the hydraulic motor and the fuel pump.
(1) Install the tachometer on the drive coupling of the fuel delivery pump. ?
(2)yjM) •.$ f
Loosen the jam nut on the adjustment screw of the flow control valve. ;;
(3) Turn on the fuel pump drive. (16 SOL)
(4) Turn the flow control valve adjusting screw clockwise to increase or counter-clockwise to decrease the fuel pump speed, until it is set at 3400 rpm.
(5) Tighten jam nut
(eb Turn off the fuel pump drive.
(7) Remove the tachometer
SECTION 4. ADJUSTMENT AND TEST 2-4Page 17
-FMC SMD-1200 MODULAR DEICERAIRUNE EQUIPMENT
3. AERIAL DEVICE - BOOM ADJUSTMENTS
A. General
A plug-in electronic programming device called a ‘Teach Pendant” is required to adjust the boom. The following information in item 3. B. describes the operation of the “Teach Pendant”. Refer to item 3. C. for specific adjustment settings for your unit.
B. ‘Teach Pendanf Operation
(1) Start auxiliary engine.
(2) Ensure that the manual valve lever cover is in the down position.
(3) Open the basket panel to expose the valve drive modules.
(4) Plug the four pin ‘Teach Pendanf into the valve drive module.
(5) * The following display should appear on the ‘Teach Pendant”:.
PQ CONTROLS INC. MODEL 508B PUSH ON TO START
(6) Press the “ON” button.After the ‘Teach Pendant” has made connection, it will run a self check and show the next display:
PQ CONTROLS INC. SELECT MENU NEXT UP/DWN FOR VALUE ENTER TO PROGRAM
(7) Press the “MENU” up or down buttons to scroll through the 18 menu selections available. The menu contains two modes; an “OPERATING FREQUENCY’ selection mode with 17 separate menu selections and a “DIAGNOSTICS” mode.The “MENU” selections are:
OPERATING FREQUENCY - (Range is 100 to 3000 HZ. Set to 200 HZ.)
SATURATION (The percent of command input for full output.)
DEADBAND (The percent of command input to achieve threshold currentoutput.
2-4Page 18 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
AUXILIARY ON % (The percent of command input to turn on the ’COMMAND
f
AUXILIARY OUTPUT.
(A) RAMP UP
(A) RAMP DOWN
(B) RAMP UP
(B) RAMP DOWN
RAMP TO OFF
(A) MIN. CURRENT
(B) MIN. CURRENT
(A) MID. CURRENT
(B) MID. CURRENT
(The rate of change in output in percent per second. As value increases so will the rate.)
Same as (A) RAMP UP except ramp direction is from high output current to low.
( Same as (A) RAMP UP except in (B) output.).
( Same as (A) RAMP DOWN except in (B) output.)
(Similar to ramp down but only works when command input transition to Neutral. It overrides ramp off. Same for (A) or (B).
(Minimum or threshold current for valve being used.)
(Minimum or threshold current for valve being used.)
(Maximum current for full command input, when operating in the MID mode [no CREEP or HIGH enabled.] for (A) output.)
(Maximum current for full command input, when operating in the MID mode [no CREEP or HIGH enabled.] for (B) output.)
(A) CREEP CURRENT (Maximum current for full command input, when operating inthe CREEP mode [CREEP ENABLE tied to 24v] for (A) output.)
(B) CREEP CURRENT (Maximum current for full command input, when operating inthe CREEP mode [CREEP ENABLE tied to 24v] for (B) output.)
(A) HIGH CURRENT
(B) HIGH CURRENT
(Maximum current for full command input, when operating in the HIGH mode [HIGH ENABLE tied to 24v] for (A) output.)
(Maximum current for full command input, when operatin in the HIGH mode [HIGH ENABLE tied to 24v] for (B) output.)
DIAGNOSTICS
(8) The diagnostic mode allows the user to see the input and output state in real time. To use the diagnostic mode, scroll through the menu until “DIAGNOSTICS” appears with the following display:
PARAMETER DO DIAGNOSTICS ENTER TO START
(9) Press the “ENTER” button for approximately one second to enter the “DIAGNOSTICS” mode. Should the M508 not respond, the ‘Teach Pendanf’ will present the frequency menu again, at which point the user must reselect the “DIAGNOSTICS” mode by scrolling through the menu buttons" When the “DIAGNOSTICS” mode has been enabled, the following screen will be displayed:
SECTION 4. ADJUSTMENT AND TEST 2-4Page 19Feb. 97
•FMCAIRUNE EQUIPMENT
SMD-1200 MODULAR DEICER
OUTPUT MAMP XXXX INPUT POS YYY%Z STATUS
Where: XXX is the approximate output current in milliamps.YYY is the command input in percent.Z is the command input direction (A,B,N)
STATUS can be:MID ENABLED HIGH ENABLED CREEP ENABLED AUX FAULT HI CURRENT FAULT OPEN CIRCUIT
(10) To exit “DIAGNOSTICS”mode, press and hold the “ENTER” button until the frequency menu is displayed.
NOTE: The diagnostic mode is to be used as an and is not intended to replace calibrated testequipment.
C. Boom Adjustment Settings
(1) Rotation [1 VC] (A = CW, B = CCW)
(a) Deadband = 10%
(b) Saturation = 99%
(c) Min A = 300 ma
(d) Min B = 300 ma
(e) Mid A = 500 ma (not used, check settinä)
(f) Mid B = 500 ma (not used, check setting)
(g) Hi A = 540 ma
(h) Hi B = 540 ma
(i) Creep A = 500 ma (not used, ensure setting is higher than “Min A”)
(i) Creep B = 500 ma (not used, ensure setting is higher than “Min B”)
(k) Ramp Up (A & B) = 20 %
(I) Ramp Down (A & B) = 20 %
(m) Ramp Off = 70 %
(n) Aux On = 90 % (not used, check setting))
2—4Page 20 MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
(0) Frequency - 45 Hz
(2) Elevation [2VC] (A = Lower, B = Raise)
(a) Deadband = 10%
(b) Saturation = 99%
(c) Min A = 340 ma
(d) Min B = 300 ma
(e) Mid A = 500 ma
(f) Mid B = 500 ma
(g) Hi A = 600 ma
(h) Hi B = 620 ma
(1) Creep A = 500 ma (not used, ensure setting is higher than “Min A”)
(j) Creep B = 500 ma (not used, ensure setting is higher than “Min B”)
(k) Ramp Up (A & B) = 20 %
(I) Ramp Down (A & B) = 70 %
(m) Ramp Off = 100 %
(n) Aux On = 90 %
(o) Frequency = 45 Hz
D. To Adjust Rotator Drive
(1) Rotate the bearing gear so that the point of minimum clearance (marked by paint on the gear) is facing the pinion gear of the rotator drive.
(2) Adjust the drive by rotating the eccentric ring to set a backlash of .002 / .004 in (.05 0 / .1016 mm) (a .003 in, .0762 mm feeler gauge may be used)
(3) Torque attachment bolts to 90 Ft.-Lbs.(12.45 kg-m) and leave bearing gear in this position for rotator installation.
E. Stability and Load Test
Perform this test yearly to help find any sign of work hardening cracks, which could otherwise go unnoticed.
(1) Drive truck onto level surface and raise main boom approximately 16° to 24° so that the bottom of the basket is between 10 ft. (3.05 m) and 14 ft. (4.26 m) above the ground.
USE FORK LIFT WHEN POSITIONING AND SUSPENDING THE WEIGHTS.DO NOT SUSPEND THE WEIGHTS MORE THAN 6 IN. (152.4 MM) OFF THE
SECTION 4. ADJUSTMENT AND TEST 2-4Page 21Feb. 97
-FMC SMD-1200 MODULAR DEICERAIRLINE EQUIPMENT
GROUND. DO NOT ALLOW OTHERS TO STAND NEAR THE SUSPENDED WEIGHTS.
(2) Suspend a 675 lb. (306 kg) weight from the chain.
(3) With the weight suspended, rotate the aerial device through its entire range. The truck and aerial device must remain stable.
(4) After weight testing, visually inspect all welds on the aerial device, pedestal, and frame tiedown studs for defects. If any defects are found, contact FMC/TRUMP before using aerial device.
4. AUXILIARY ENGINE RPM ADJUSTMENT
A. Gasoline Engine (Ref. Figure 7)
(1) Remove locking screw from governor ’’Adjusting Bushing”.
(2) Hold adjusting screw stationary and turn ’’Adjusting Bushing” clockwise to increase engine RPM and counterclockwise to decrease engine RPM.
(3) Replace locking screw and recheck RPM.
(4) Place a load on the engine to check for engine surge (fluctuation).
(5) If engine does not surge , install lockwire.
(6) If engine surges, turn ’’Adjusting Screw” 1/4 turn clockwise and hold.
(7) While holding adjusting screw, turn adjusting bushing counterclockwise to adjust no load governed RPM. Repeat until RPM is stable.
NOTE: If governor control is not responsive enough, it can cause too great a variation in enginerpm between load and no load. If this occurs, turn ’’Adjusting Bushing” 1/4 turn clockwise and hold; then turn ’’Adjusting Screw” counterclockwise to adjust no load RPM. Repeat until performance is satisfactory. If surging develops, return to previous settings until governor stabilizes. Recheck and then install lockwire.
B. Perkins Diesel Engine (Ref. Figure 8)
(1) With engine off, remove cotter pin from clevis in the throttle arm rod.
(2) Loosen Jamnut and turn clevis to increase or decrease rod length. Increase rod length to decrease RPM and decrease rod length to increase RPM.
(3) Tighten Jamnut and insert cotter pin.
■ o2-4Page 22Feb. 97
MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
(4) Start engine and check auxiliary engine RPM for a low idle of 1000 RPM and a high idle (no load) of 2200 RPM.
(5) If engine RPM is unsatisfactory, turn off engine and repeat steps 1 thru 4. Continue this procedure until RPM is properly adjusted.
BB BASKET T TANK136 BO BOOM HD HYDRAULICS137 E .ENGINE * ALL COMPONENTS WITHOUT =138 CC CAB CONTROL BOX SIGN ASSUMED TO BE IN ...139 F FLUID PLUMBING MP MAIN PANEL
H HEATER140 EC ENGINE/HTR COMPARTMENT141 B BODY SHROUDING
173174175176 17?178179180 181 182
Figure 1HOW TO READ ELECTRIC SCHEMATIC
622-4420622-8010
2-5Page 2Feb. 97
MAINTENANCE / TROUBLESHOOTING
SMD-1200 MODULAR DEICER •FMCAIRLINE EQUIPMENT
A SIGNAL CROSS REFERENCE
B LINE NUMBER REFERENCE
C LINE CROSS REFERENCE
D THE LINE WITH NO NUMBER
E DOTTED LINES
F DEVICE I.D.
G WIRE NUMBER
H COIL LINE REFERENCE
I FUNCTION
THIS TELLS WHERE THE SIGNAL IS COMING FROM OR GOING TO.THE L1 IS THE COMPUTERS WAY OF KEEPING TRACK AND THE NUMBER ABOVE IT TELLS WHAT LINE NUMBER IT CAME FROM OR IS GOING TO FOR QUICK REFERENCING.
IN THIS PARTICULAR CASE LINE 148 IS INTERPRETED AS SHEET 1 LINE 48.
TELLS WHERE TO FIND THE CONTACTS FOR THE RELAY COIL IT IS LOCATED BESIDE. THE NUMBER REFERS TO LINE NUMBER. IF THE NUMBER IS UNDERLINED IT MEANS THE CONTACT IS NORMALLY CLOSED, OTHERWISE IT WILL BE NORMALLY OPEN.
IT MEANS THE N.C. CONTACT HAS NOT BEEN USED. THE LINE IS A REFERENCE THAT IT STILL HAS A N.C. CONTACT AVAILABLE. IF THIS HAD BEEN A 2 POLE OR 4 POLE RELAY, THERE WOULD BE 2 OR 4 LINES IN A ROW.
REPRESENT OPTIONS OR OTHERWISE NON-STANDARD FEATURES.
THIS SET OF NUMBERS IDENTIFIES THE SPECIFIC COMPONENT. THE = SIGN TELLS WHERE THE COMPONENT IS INSTALLED. (I.E. =BP MEANS IT IS LOCATED IN THE BRIDGE PANEL). IF THE = SIGN IS NOT PRESENT IT IS ASSUMED TO BE IN THE MAIN PANEL. THE -X2CR IS THE ACTUAL DEVICE I.D. (SEE LEGEND FOR LOCATION EXPLANATIONS)
LOCATES AND IDENTIFIES WIRE NUMBERS.
TELLS WHERE THE COIL IS LOCATED.
THIS DESCRIPTION TELLS WHEN THE CONTACTS CHANGE STATE OR WHEN THE COIL IS ENERGIZED. ALL CONTACTS SHOWN IN UNEXECUTED STATE.
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