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0040-15
DRAFT 0040- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
HWT2737
Table 14. Load Plan (Stowage Compartment T2).
NO. ITEM QTY.
1 Antenna 1
2 Chain Assy. (14 ft.) 1
3 Chain, Utility (7 ft.) 1
4 Extension Cord, Shoreline (75 ft.) 1
5 Extension Handle 1
6 Foam Tank Drain Hose 1
7 Hose Reel Handle 1
8 Hydraulic Jack and Handle 1
9 Jack Plate 1
10 Lug Nut Wrench (2 pcs.) 1
11 Padlock w/Chain 412 Padlock w/o Chain 1
13 Pump Blow out Hose 1
14 Shackle Anchor 1
15 Tire Gauge Inflator/Deflator 2
16 Tire Inflation Hose Assembly 2
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DRAFT 0040- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
END OF WORK PACKAGE
HWT0857
Table 15. Load Plan (Stowage Compartment T4).
NO. ITEM QTY.
1 Soft Discharge Hose - 3 in. x 50 ft., Double Jacketed NFPA Hose,(2-1/2 in. Connections)
8
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CHAPTER 3
TROUBLESHOOTING PROCEDURES
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0041-1
DRAFT 0041OPERATOR AND FIELD LEVEL MAINTENANCE
TROUBLESHOOTING INSTRUCTIONS INTRODUCTION
This chapter contains Operator and Field Level troubleshooting procedures to diagnose and correct the most
common malfunctions of the HEWATT. Refer to TM 9-2320-325-14&P for M985 series vehicle troubleshooting.Each troubleshooting procedure in this manual lists a malfunction, followed by tests or inspections, and thecorrective actions needed to correct the malfunction. This manual cannot list all malfunctions that may occur. Nor can it list all test, inspections, and corrective actions needed to correct the malfunctions. If a malfunction is notlisted, or if listed corrective actions do not correct the malfunction, notify your Supervisor. Se e WP 0042 for anindex of Operator Level troubleshooting procedures, and WP 0043 for Field Level troubleshooting procedures.
Before beginning any troubleshooting procedure, read and understand the operating procedures listed inChapter 2 of this manual. Perform all applicable Preventive Maintenance Checks and Services (PMCS)procedures for the M985 series vehicle (TM 9-2320-325-14&P) and the M1158 series vehicle (WP 0128). Ensureall system setup procedures are completed.
All steps in these troubleshooting procedures must be performed in the order listed, to ensure all system interlocksare in the correct position for system operations.
a. Resistance Checks.
CAUTIONUse proper sized test leads and ensure care is used when checking for resistance,continuity, or voltage at connectors or damage to equipment may result.
1. Set the multimeter function/range switch to the desired ohm position. If the magnitude of the resistanceis not known, set the switch to the highest range, then reduce range until a satisfactory reading isobtained.
NOTESome meters show l+m, or simply l when function/range switch is set to an ohmposition.
2. Connect red test lead to volt-ohm input connector and black lead to COM connector on multimeter.When the test leads are separated or measuring out-of-range resistance, the digital display will indicateOL (Over Load).
3. If the circuit being measured is connected to power, turn engine start switch OFF (TM 9-2320-422-10).
4. Connect test leads to the circuit being measured. When measuring high resistance be careful not tocontact adjacent point, even if they are insulated. Some insulators have a relatively low insulationresistance which can affect the resulting measurement.
5. Read the resistance value on the digital display.
6. If your meter does not work in this manner, learn how it operates before performing troubleshooting.
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DRAFT 0041b. Continuity Checks.
1. Set the multimeter function/range switch to any ohm range.
NOTESome meters show l+m, or simply l when function/range switch is set to an ohm
position.
2. Connect red test lead to volt-ohm input connector and black lead to COM connector on multimeter.When the test leads are separated or measuring out-of-range resistance, the digital display will indicateOL (Over Load).
3. If the circuit being measured is connected to power, turn engine start switch OFF (TM 9-2320-422-10).
4. Connect test lead to one end of the wire or circuit to be measured. Use the other test lead to trace thecircuit being measured. When continuity is established, an ohm symbol will appear in the upper leftcorner of the digital display. If contact with the circuit is maintained long enough (about 1/4 second), theOL display will disappear and the resistance value of the circuit will be displayed. A resistance value of 200 ohms or less indicates continuity is being measured.
5. If your multimeter does not work in this manner, learn how it operates before performing troubleshooting.
c. Voltage Checks.
The HEWATT is equipped with 24 VDC circuits. However, a valid reading may vary from 22 to 28 VDC, dependingon the charge on the batteries. When the batteries are fully charged, 25.2 VDC can be measured on an open24 VDC circuit, and 29 VDC can be measured when the engine is running at 1000 rpm.
1. Set the multimeter function/range switch to the desired volts position. If the magnitude of the voltage isnot known, set the switch to the highest range, then reduce range until a satisfactory reading is obtained.If a DC-AC switch is present, ensure it is set to the DC position
2. Connect red test lead to volt-ohm input connector and black lead to COM connector on multimeter.
3. Connect the tests leads to the circuit being measured. Connecting the red lead to the positive (+)connection and the black test lead to the negative (-) or ground connection.
4. Turn on switches as indicated in test procedure, to apply power to circuit being measured.
5. Read the voltage value on the digital display.
6. If your meter does not work in this manner, learn how it operates before performing troubleshooting.
d. General Wire Testing and Repair.
Troubleshooting for the HEWATT electrical system isolates malfunctions down to specific faulty components, usingresistance, continuity, and voltage checks as noted above. When the troubleshooting isolates the malfunction to afaulty wire, the wire harness may be repaired or some cases replaced at Field Level Maintenance. If the wireharness cannot be repaired or replaced at Field Level Maintenance, notify your Supervisor.
Wire repair at Field Level Maintenance is limited to splicing and taping the faulty wire. Refer toTM 9-2320-325-14&P for wire harness repair procedures.
END OF WORK PACKAGE
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0042-1/(2 blank)
DRAFT 0042OPERATOR MAINTENANCE
OPERATOR LEVEL TROUBLESHOOTING FAULT INDEX
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END OF WORK PACKAGE
Table 1. Operator Level Troubleshooting Fault Index.
Troubleshooting Procedure Work Package
24-Volt Battery Charger Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0044
Check For Open Compartment Door When Light Is On Indicator Flashes. . . . . . . . . . . . . . . . . 0045
Streamlight Battery Charger(s) Does Not Charge Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0046
Foam System Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0047
Pressure Governor Control Displays WARNING! or CAUTION! . . . . . . . . . . . . . . . . . . . . . . . . 0048
Pressure Governor Controls Do Not Operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0049
Pump Does Not Prime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0050
Pump Loses Prime or Pressure Governor Displays LOW SUPPLY or PRESET NOT MET, andPump Returns to Idle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00 51
Drain Valves or Main Inlet Cap Leaking During Pumping Operations . . . . . . . . . . . . . . . . . . . . 0052
Handheld Radio Battery Charger(s) Does Not Charge Batteries . . . . . . . . . . . . . . . . . . . . . . . . 0053
Scene Lights, Step Lights, Cab Dome Lights, Clearance Lights, and Stowage CompartmentLights or Warning Lights Do Not Operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0054
Discharges Have Abnormal Water Stream. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0055
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DRAFT 0043FIELD LEVEL MAINTENANCE
FIELD LEVEL TROUBLESHOOTING FAULT INDEX
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Table 1. Field Level Troubleshooting Fault Index.
Troubleshooting Procedure Work Package
FIRE PUMP SYSTEM
Hydraulic Heat Exchanger Fan(s) Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0056
FOAM PROPORTIONER SYSTEM
Foam Not Delivered From All Systems (Bumper Turret, Under Truck Nozzles, and ManualMetering Controls) or System Does Not Shut Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0057
Foam Not Delivered From Bumper Turret . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0058
Foam Not Delivered From Under Truck Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0059
Foam Not Delivered When Manual Metering Control Is Operated . . . . . . . . . . . . . . . . . . . . . . . 0060
Foam System Cannot Be Flushed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0061
Foam Tank Level Indicator Gauge Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . 0062
WATER TANK ASSEMBLY
Bumper Turret Does Not Operate Properly When Selected. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0063
Direct Tank Fill Valve Does Not Operate Properly (Auto or Manual Mode) . . . . . . . . . . . . . . . . 0064
Driver Side Auxiliary Inlet Valve Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . 0065
Hose Reel Rewind Control Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0066
Hose Reel Discharge Valve Does Not Operate When Selected. . . . . . . . . . . . . . . . . . . . . . . . . 0067
No. 1 Driver Side Discharge Valve Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . 0068
No. 2 Passenger Side Discharge Valve Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . 0069
Passenger Side Auxiliary Inlet Valve Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . 0070
Pump Cooler Valve Does Not Operate Properly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0071
Pressure Governor Controls Do Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0072
Pump Priming System Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0073
System Will Not Build or Hold Pressure During Blow Out Procedure . . . . . . . . . . . . . . . . . . . . 0074Tank Fill & Re-Circulating Line Valve Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . 0075
Tank-To-Pump Valve Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0076
Under Truck Nozzles Do Not Operate When Selected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0077
Water Pump Is Noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0078
Water PUMP PTO Does Not Engage When Selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0079
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DRAFT 0043
Water Tank Drain Valve Does Not Operate When Selected . . . . . . . . . . . . . . . . . . . . . . . . . . . 0080
Water Tank Level Indicator Gauge Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . 0081
Water Pump Input Pressure Low or Pressure Governor Displays CAVITATION, LOW SUPPLYPressure, and Pump Returns to Idle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0082
Water Pump Is Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0083
Water Pump Output Pressure Low or Pressure Governor Displays PRESET NOT MET, andPump Returns to Idle Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0084
Windshield Deluge System Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0085
INSTRUMENT HOUSING ASSEMBLY
Cab Switch Backlighting Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0086
Direct Tank Fill AUTO Indicator Does Not Illuminate (Pump Operators Panel) . . . . . . . . . . . . 0087
Direct Tank Fill OPEN Indicator Does Not Illuminate (Pump Operators Panel) . . . . . . . . . . . . 0088
Check For Open Compartment Door When Light Is On Indicator Does Not Operate Properly. 0089
FOAM FLUSH Indicator Does Not Illuminate (Pump Operator's Panel) . . . . . . . . . . . . . . . . . . 0090
FOAM SYSTEM Indicator Does Not Illuminate (Cab) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0091
FOAM SYSTEM Indicator Does Not Illuminate (Pump Operator's Panel). . . . . . . . . . . . . . . . . 0092
Hose REEL DISCHARGE Valve Indicator Does Not Illuminate (Pump Operator's Panel) . . . . 0093
PUMP COOLER Indicator Does Not Illuminate (Cab). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0094
PUMP COOLER Indicator Does Not Illuminate (Pump Operator's Panel) . . . . . . . . . . . . . . . . 0095
PUMP PTO ENGAGED Indicator Does Not Illuminate (Cab) . . . . . . . . . . . . . . . . . . . . . . . . . . 0096PUMP HOT Audio Alarm or Indicator Does Not Operate Properly (Pump Operator's Panel) . . 0097
WATER TANK DRAIN Indicator Does Not Illuminate (Pump Operator's Panel) . . . . . . . . . . . . 0098
TANK TO PUMP Indicator Does Not Illuminate (Cab). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0099
TANK TO PUMP Indicator Does Not Illuminate (Pump Operator's Panel) . . . . . . . . . . . . . . . . 0100
UNDER TRUCK NOZZLES Indicator Does Not Illuminate (CAB). . . . . . . . . . . . . . . . . . . . . . . 0101
WARNING LIGHT ASSEMBLY
Warning Lights (All) Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0102
Warning Lights (Front and Rear Lower) Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0103
Warning Lights (Overhead Beacon) Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0104
Warning Lights (Cab Roof Lightbar) Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0105
Warning Lights (Side) Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0106
Warning Lights (Upper Rear) Do Not Operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0107
Table 1. Field Level Troubleshooting Fault Index. (Continued)
Troubleshooting Procedure Work Package
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0043-3/(4 blank)
DRAFT 0043
END OF WORK PACKAGE
SPOTLIGHTS
Driver Side Scene Light(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0108
Step (Hose Bed) Light(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0109
Passenger Side Scene Light(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0110
Rear Scene Light(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0111
DOME AND ENGINE LIGHT ASSEMBLY
Cab Dome Light(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0112
12-Volt Handheld Radio Charger(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0113
MISCELLANEOUS ELECTRICAL COMPONENTS
12-Volt Streamlight Charger(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0114
24-Volt Battery Charger Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0115
Clearance and/or Directional Light(s) Does Not Operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0116
Driver Side Stowage Compartment Striplight(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . 0117
Foam/Water Level Gauge(s) Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0118
Two-Way Radio Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0119
Intercom and Headsets Do Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0120
Passenger Side Stowage Compartment Striplight(s) Does Not Operate . . . . . . . . . . . . . . . . . . 0121
Pump House or Pump Operators Panel Striplight(s) Does Not Operate . . . . . . . . . . . . . . . . . . 0122Rear Step Buzzer Audio Alarm Does Not Operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0123
SINCGARS Do Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0124
Siren Does Not Operate Properly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0125
Shoreline Inlet Receptacle Does Not Operate Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0126
HEATER, VEHICLE COMPARTMENT
Pump House Heater Does Not Operate Properly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0127
Table 1. Field Level Troubleshooting Fault Index. (Continued)
Troubleshooting Procedure Work Package
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TM 9-2320-328-13&P-1DRAFT 0044OPERATOR MAINTENANCE
24-VOLT BATTERY CHARGER DOES NOT OPERATE
INITIAL SETUP:
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MALFUNCTIONTEST OR INSPECTION
CORRECTIVE ACTION
24-VOLT BATTERY CHARGER DOES NOT OPERATE
HWT0921
Equipment ConditionsEngine OFF (TM 9-2320-422-10)Wheels chocked (TM 9-2320-422-10)
