LEY-S-344,384
LLeeyyllaannddService Manual
344 & 384
THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF LEYLAND OR IT’S SUCCESSORS. LEYLAND AND IT’S SUCCESSORS
ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.
TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.
Serv
ice
Man
ual
TRACTOR 255 (344) 270 (384)
~ody
Brakes
Clutch
Cooling system ..
Eleetrical ..
Engine
Final drive and reduction gears
Front axle and steering gear
Fuel system
INDEX
Gearbox.-power take-off and belt pulley unit
General Data
Hydraulic units (early type)
Hydraulic units (with position and draught control)
Lubrication
Maintenance
Service tools
Group
64
33
29
28
35
25
31
32
26
30
Front of book
37
37a
Front of book
Front of book
End of book
\
MAINTENANCE
LUBRICATION
The correct oil and grease recommendations for the individual components are given on Page 'Lubrication 2'.
I~ I) u \) .., _. -_._----
ENGINE. Check the sump oil level by removing the dipstick (1). The level should show at the 'MAX' position on the dipstick. To drain the sump oil remove the plug (2). Clean the plug before replacing it. Turn the oil filler cap (3) anticlockwise to remove. Fill the sump with new oil until the correct level is shown on the dipstick. The sump is best drained when the engine is warm.
FUEL INJECTION PUMP. To drain the pump, remove the drain plug (1). Remove the level plug (2) and the filler plug (3). Fill the pump with new oil till it just runs from the level plug hol~. .
DYNAMO. Remove the rubber plug (1), insert two drops of oil to the central hole (arrowed) in the end plate.
TRANSMISSION. Check the transmission case oil level by removing the dipstick (1). The level should show at the'H' mark on the dipstick. To drain the transmission remove. both plugs, one at each side, from the axle case (2). Remove the; filler plug (3). Fill the transmission case with new oil until the correct level is shown on the dipstick. The transmission is best drai.ned after several hours' work while the case is warm.
Maintenance 1
25
ENGINE
B REMOVING AND REFITTING COMPONENTS Page Section
Big-ends .. '. 25/B7 B5
Camshaft "" 25/B8 B6 .. Connecting rods " .. 25/B14 B9
Crankshaft .; 25/B14 B9
Crankshaft balancer .. 25/B14 B9
Crankshaft rear 011 seal 25/B17 B10
Cylinder head 25/B3 B2
Engine 25/B10 B7
Flywheel 25/B17 B10
Oil pump 25/B14 B9
Pistons 25/B14 B9
Sump 25/B7 B4
Tappets 25/B2 B1
Timing c~ver 25/B4 B3
Timing cover oil seal 25/B13 B8
Timing gear case .. .. 25/B4 B3
Timing gears 25/B4 B3
Valve rocker shaft 25/B2 B1
C OVERHAULING
Balancer support bracket 25/C9 C10
Camshaft bearing liner 25/C3 C4
Connecting rods " 25/C8 C9
Crankshaft 25/C3 C3
Cylinder head 25/C4 C5
Cylinder liners 25/C3 C2
Flywheel 25/C5 C6
Fuel injector sleeves 25/C4 C5
011 pressure relief valve .. 25/C6 C7
Oil pump .. 25/C6 C7
Pistons 25jC8 C9
Tappets 25/C2 C1
Timing gears 25fC7 C8
Valve gUides 25fC4 C5
Valve rockers 25/C2 C1
Valve rocker shaft 011 relief valve 25fC2 C1
Valve seat inserts 25/C4 C5
Valves 25fC4 C5
25/81
26
J
FUEL SYSTEM
B REMOVING AND REFITTING COMPONENTS Page Section
Bleeding the system 26/B2 B1 • >~
Fuel filter .. 26/B2 B2
Fuel tank .. 26/B2 B3 .- ...... Injection pump 26/8-(' B6
Injectors 26/B3 .&4
lift pump .. 26/B3 'BS
C OVERHAULING
Injection pump 26/C6 C3
Injectors 26/C2 C1
lift pump .. 26/C3 C2
26/~1. , .:;.
-~
COOLING SYSTEM
B REMOVING AND REFITTING COMPONENTS
Fan blades ..
Overflow tank
Pulley
Radiator
Radiator and frame
Thermostat
Water pump
C OVERHAULING
Thermostat
Water pump
..
Page
28/B4
28/B4
28/B4
28/B2
28/B3
28/B5
28/84
28/C2
28/C2
Section
B4
B3
B4
B1
B2
B5
84
Cl C1
28
28/81
CLUTCH
B REMOVING AND REFITTING COMPONENTS
Carrier bracket and transmission assembly (LP.T.O.)
Clutch and brake controls
Clutch cover
Double clutch
Single clutch
C OVERHAULING
Carrier bracket and transmission assembly (I.P.T.O.)
Clutch and brake controls
Double clutch
Single clutch
Page
29{B3
29{B7
29/B?
29{~4
29{B6
29/C3
29{C6
29/C4
29{C2
Section
B2
B5
B1
B3
B4
C2
C4
C3
C1
29
29/81
30
GEARBOX AND POWER TAKE-OFF
B REMOVING AND REFITTING COMPONENTS Page Section
Belt pulley unit .. 30/B8 B8
Centre bearing assembly 30/B4 B3
Gearbox top cover. 30/B3 B2
Layshaft assembly 30/BS B4
Malnshaft assembly 30/B4 B3
Power take-off driving tube assembly .. 30/B7 B6
Power take-off shaft and bearing housing assembly 30/B7 B7
Primary shaft (Basic) 30/B6 BS
Primary shaft (!'P.T.O.) .. 30/B2 B1
Reverse gear 30/BS B4
Stub shaft (Basic) .. 30/B6 BS
Stub shaft (!.P.T.O.) 30/B2 B1
C OVERHAULING .
Belt pulley unit .. 30/C7 C10
Centre bearing assembly .. 30/CS C6
Gearbox top cover 30/C3 C1
Layshaft 30/CS C7
Malnshaft .. 30/C3 C2
Power take-off driving gear 3OfC4 CS
Power take-off shaft and bearing housing 30/C6 C9
Primary shaft 30/C4 C4
Reverse gear 30/C6 C8
Stub shaft .. 30/C4 C4
Transfer gear case and cover 30/C4 C3
30/81
FINAL DRIVE AND REDUCTION GEAR
B REMOVING AND REFITTING COMPONENTS
Differential assembly
Differential lock .. Rear axle assemblies
C OVERHAULING
Differential assembly
Rear axle assemblies
Page
31/B4
31/B3
31/B2
31/C3
31/C2
Section
B3
B2
B1
C2
C1
31
31/B1
FRONT AXLE AND STEERING GEAR
A ADJUSTING
Front wheel alignment ..
B REMOVING AND REFITTING COMPONENTS
Front axle ..
Front hubs ..
Power steering cylinder ..
Power steering pump
Steering cranked arm
Steering gear
C OVERHAULING
Front axle ..
Front hubs ..
Power steering cylinder ..
Power steering pump
Steering cranked arm
Steering gear
Page
32/A2
32/B3
32/B2
32/B6
32/B2
32/B5
32/B4
32/CS
32/C3
32/C4
32/C6
32/C3
32/C2
32
Section
A1
B3
B1 B6
B2
B5
B4
C6
C2
C4
C5
C3
C1
32{A1
BRAKES
BRAKES
B REMOVING AND REFITTING COMPONENTS
Disc brakes
Independent brakes
C OVERHAULING
Disc brake actuator
Page
33/B2
33/B2
33/C2
33
Section
B1
B2
C1
33/81
ELECTRICAL
ELECTRICAL
A DESCRIPTION
B
C
Wiring Diagram-D.C. Generator. Positive Earth ..
Wiring Diagram-D.C. Generator. Negative Earth ..
Wiring Diagram-A.C. Generator. Negative Earth ..
TESTING AND ADJUSTING
Control box
Charging circuit (Alternator)
REMOVING AND REFITTING COMPONENTS
Generator ..
Starter
Service precautions
Windscreen wiper motor
OVERHAULING
Generator Dynamo ..
Alternator
Starter
Windscreen wiper motor
Page
35/A2
35/A4
35/A6
35/A8
35/A10
35/82
35/82
35/83
35/83
35/C4
35/C8
35/C2
35/C6
35
Section
82
81
83
B4
C2
C4
C1
C3
35/A1
,HYDRAULICS (EARLY TYPE)
A DESCRIPTION
B
C
Hydraulic power unit and P.T.O. with depth control ""
Power take-off selector positions
Valve assembly h"ydraulic flow
TESTING
Depth control hydraulic circuit ..
High pressure spring
High pressure valve"
REMOVING AND REFITTING COMPONENTS
Cross-shaft assembly
Depth control valve
Draught control Belleville washer pack mechanism
Hydraulic cylinder assembly
Hydraulic lift pump
Hydraulic lift control quadrant ""
Hydraulic power unit
Quadrant linkage. " "
Relief valve housing
Relief valves
Valve body and cylinder assembly
OVERHAULING
Cross-shaft assembly
Dep~h control valve
Draught control Belleville washer pack
Hydraulic cylinder assembly
HydrauliC lift control quadrant ""
Hydraulic lift pump
Valve body and cylinder assembly
" "
Page
37/A6
37/AS
37/A2
37/A8
37/A8
37/A8
37/B2
37/B4
37/B5
37/B8
37/B7
37/B2
37/B6
37/B2
37/B3
37/B3
37/B8
371C3
371C4
371C5
371C8
371C2
371C6
371C8
37
Section
B2
B4
B5
B8
B7
B1
B6
B1
B3
B3
B8
C2
C3
C4
C6
C1
C5
C6
371M
37a
HYDRAULICS (WITH POSITION AND DRAUGHT CONTROL)
A DESCRIPTION Page Section
Valve assembly hydraulic flow 37a/A2
Power take-off selector positions 37a/A10
ADJUSTING
Hydraulic unit controls 37a/A8
FAULT FINDING
Charts 37a/A11
B REMOVING AND REFITTING COMPONENTS Belleville washer pack mechanism 37a/B-4 B3
Control levers assembly · . 37a/B3 B2
Cross-shaft assembly 37a/B-4 B4
Draught sensing control · . 37a/B6 B7
Hydraulic power unit 37a/B5 B5
Hydraulic pump 37a/B6 B6
Relief valves and housing (In position) .. 37a/B2 B1
Valve body and cylinder assembly 37a/B7 B8
C OVERHAULING
Belleville washer pack mechanism 37a/C9 C6
Control levers assembly · . 37a/C5 C3
Cross-shaft assembly 37a/C4 C2
Draught sensing control · . 37a/C8 C5
Hydraulic pump 37a/C6 C4
Valve body and cylinder assembly 37a/C2 C1
37a/A1
64
BODY
B REMOVING AND REFITTING COMPONENTS Page Section
Safety cab •• 64/82 81
Windscreen, door and front panel glass 64/82 82
Cab side windows 64/83 83
64/81
98 mm ENGINE
INDEX
Group Clutch 29
Cooling System 28
Diesel Engine 25
Diesel Fuel System 26
Electrical .. 35
General Data .Front of Supplement
lubrication Front of Supplement
Maintenance Front of Supplement
Power Steering .. 32
Service Tools End of Supplement
NOTE.-The dismantling and assembly procedures in this Supplement are presented assuming the engine has been removed from the vehicle.
3
25 DIESEL ENGINE
C OVERHAULING Page Section
Balancer support bracket .. 2S/C10 C13
Bearing housing (D.P.A. Injection pump drive) .. 2S/C9 C12
Camshaft 2S/C7 C9
Connecting rods 25jC3 C2
Crankshaft 25/C7 C8
Cylinder head 2SjC4 C4
Cylinder liner 25/C4 C3
Flywheel .. 2S/C6 C7
Main Idler gear 2S/C6 C6
011 pump 2S/C8 C10
Pistons 25jC3 C2
Tappets 2S/C6 CS
.Valve gUides 25/C4 C4
Valve rocker shaft .. 2SjC2 C1
Valve rocker shaft 011 pressure relief valve 25/C9 C11
Valve seat Inserts 25/C4 C4
Valves .. 25/C4 C4
25/A2 98 mm ENGINE
25 12. Remove the timing cover securing bolts. detach the
front lifting bracket. and pull the timing cover off the two dowels locating it to the timing case. NOTE.-The main idler gear thrust washer may stick to the timing cover.
13. Remove the oil thrower from the crankshaft. and the thrust washer from the main idler gear shaft.
14. Refit the crankshaft nut and rotate the crankshaft until the timing marks on the timing gears are in the positions shown in Fig. 2. Remove the nut.
15. Remove the bolts securing the injection pump drive gear and remove the gear from its hub.
16. Remove the circlip from the hub inside the rear end of the bearing housing.
17. Withdraw the gear hub forward. from the hub bearings. using tools'18G 284 and 18G 284 AAB.
18. Remove the securing bolts and nuts. and withdraw the bearing housing rearwards from the timing case.
Refitting 19. Reverse the procedure 1 to 18. noting:
a. Refer to Data for torque wrench settings. b. Disengage the main idler gear. fit the injection
pump drive gear to its hub with the hub and gear timing marks aligned as shown in Fig. 3. Engage the main idler gear so that the timing gears are positioned as shown in Fig. 2.
c. Fit the main idler gear thrust washer with its grooved side towards the gear.
d. Fit the crankshaft oil thrower with its chamfered face towards ·the gear. .
e. Apply sealing compound to both sides of the sump gasket.
(. Position the alternator (or dynamo) to give the correct drive belt tension (refer to 'MAINTENANCE').
g. Check the position of the injection pump timing pointer as follows:
25/816
I. With No. 1 piston at the beginning of its compression stroke. insert timing pin AMK 9990 through the hole in the flywheel housing and into the hole in the flywheel.
il. If necessary. maintain alight pressure on the timing pin and turn the crankshaft in its normal direction of rotation until the timing pin engages the hole in the flywheel.
iiI. Using tool 18G 1206 check and. if necessary. adj~st the position of the injection pump timing pointer (refer to Fig. 4). Remove the timing pin and timing tool. .
Procedure using timing gauge MS 67. Carry out Instructions i and Ii above, then proceed as follows: I. Remove the scribing arm from timing gauge
MS 67 and locate the hexagonal handle through the gauge body so that the corner marked '0' is in line with the 240° position marked on the gauge body spigot (refer to Fig. 5). Insert the splined end of the gauge into the injection pump drive gear hub and slide the gauge body forward until it abuts the
DIESEL ENGINE
Fig. 2
Fig. 3
Fig. 4
98 mm ENGINE
DIESEL FUEL SYSTEM
A TESTING
Testing the lift pump
B REMOVING AND REFITTING COMPONENTS
Bleeding the system (D.P.A. injection pump)
Bleeding the system (Simms in-line injection pump)
D.P.A. injection pump
Injectors
Simms in-line injection pump
C OVERHAULING
lift pump
98 mm ENGINE
Page
26/A2
26/B2
26/B2
26/B2
26/B5
26/B4
26/C2
26
Section
A1
B1
B2
B3
B5
B4
C1
26/A1
COOLING SYSTEM
B REMOVING AND REFITTING COMPONENTS
Thermostat ..
Fan blades. pulley. and water pump
C OVERHAULING
Water pump ..
98mm ENGINE
Page
28/82
28/82
28/C2
28
Section
81
82
C1
28/81
