John Deere 425 445 455 Lawn Garden Tractor Technical Manual TM1517 PDF

A
Air cleaner
455, disassembly/inspection/assembly 10-10
FD620D, removal/inspection/installation 10-4
Air Cleaner 415 and 455 10-10
Air filter
Restriction indicator test 4-31
Air intake system leakage test 4-31
Air pressure sensor test 5-376
Air temperature sensor test 5-377
Alternative lubricants 2-21
Alternator
445, 20-Amp 5-413
455, 40-Amp 5-415
Alternator belt, removal/installation 10-11
Armature, starting motor 5-404
Axle, front
Disassembly/assembly 7-30
Removal/installation 7-29
B
Backlash check, timing gear, late models 4-50
Battery
Charging 5-378
Load test 5-379
Test 5-377
Bearing clearance check, connecting rod 4-51
Bearing clearance check, main, crankshaft 4-53
Bleed fuel system 4-32
Brake
PTO, disassembly/inspection/assembly 6-45
PTO, removal/installation 6-44
Brake switch, test and adjustment 5-379
Brake system
Diagnosis 8-7
Operation 8-5
Test points 8-8
Brake test, Mid-PTO 6-29
Brake/differential linkage
Adjustment 8-9
Disassembly/assembly 8-10
Brakes
Linkage
Adjustment 8-12
Disassembly/assembly 8-13
Removal/installation 8-11
Break-in engine oil
4-cycle gasoline 2-17
Diesel 2-16
Breather operation 4-21
C
inspection 4-84
Removal/installation 4-84
Camshaft 3-68
Bearing inspection 3-69
Inspection 3-68
Inspection/replacement 4-82
Installation 4-81
Removal 4-81
Removal/installation 3-68
Camshaft end play check 4-49
Carbureted engine system operation 3-10
Carburetor
Clean and rebuild 3-54
Exploded view, 425 3-53
Float level adjustment 3-54
Carburetor 425 3-53
Center valve block, hydrostatic power train 6-57
Charge pressure test 6-28
Charge pump
Disassembly/assembly 6-34
Flow test 6-27
Removal/installation 6-34
Charge pump flow quick test, at couplers 9-20
Charge pump pressure quick test, at couplers 9-20
Charging circuit
Diagnosis
425 (S.N—070000) 5-70
425 (S.N070001— ) 5-72
445 (S.N07000— ) 5-189
445 (S.N—070000) 5-187
455 (S.N—070000) 5-305
455 (S.N070001— ) 5-307
Operation
425 (S.N—070000) 5-66
425 (S.N070001— ) 5-66
445 (S.N—070000) 5-184
445 (S.N070001— ) 5-184
455 (S.N—070000) 5-302
455 (S.N070001— ) 5-302
Schematic
425 (S.N—070000) 5-67
425 (S.N070001— ) 5-68
445 (S.N—070000) 5-185
445 (S.N070001— ) 5-186
455 (S.N—070000) 5-303
455 (S.N070001— ) 5-304
Test Points
445 (S.N—070000) 5-188
Test points
425 (S.N—070000) 5-71
425 (S.N070001— ) 5-73
445 (S.N070001— ) 5-190
455 (S.N—070000) 5-306
455 (S.N070001— ) 5-308
Choke adjustment 3-40
Circuit operation
Charging
425 (S.N—070000) 5-66
425 (S.N070001— ) 5-66
445 (S.N—070000) 5-184
445 (S.N070001— ) 5-184
455 (S.N—070000) 5-302
455 (S.N070001— ) 5-302
Cranking
445 (S.N—070000) 5-154
445 (S.N070001— ) 5-154
455 (S.N—07000) 5-290
455 (S.N07001— ) 5-290
Fuel injection sensor and diagnostic light
445 (S.N—070000) 5-248
445 (S.N070001— ) 5-249
Fuel injector and fuel pump
445 —070000) 5-230
445 070001— ) 5-231
Fuel pump
455 (S.N—070000) 5-340
455 (S.N070001— ) 5-340
Fuel pump and carburetor vent/fuel shut-off solenoid
425 (S.N—070000) 5-114
425 (S.N070001— ) 5-115
Fuel shut-off solenoid
455 (S.N —070000) 5-353
455 (S.N070001— ) 5-354
Glow plug and light circuit
455 (S.N—070000) 5-366
455 (S.N070001— ) 5-366
Ignition
425 (S.N—070000) 5-53
425 (S.N070001— ) 5-54
445 (S.N—070000) 5-167
445 (S.N070001— ) 5-168
Indicator lights, gauges, hourmeter, and lights
425 (S.N—070000) 5-93
425 (S.N070001— ) 5-94
445 (S.N—070000) 5-209
445 (S.N070001— ) 5-210
455 (S.N—070000) 5-326
455 (S.N070001— ) 5-327
Power
425 (S.N07000— ) 5-32
425 (S.N—070000) 5-32, 5-40
425 (S.N070001— ) 5-40
445 (S.N—070000) 5-142
445 (S.N070001— ) 5-142
455 (S.N—070000) 5-282
455 (S.N070001— ) 5-282
PTO
425 (S.N—070000) 5-74
425 (S.N070001— ) 5-75
445 (S.N—070000) 5-191
445 (S.N070001— ) 5-192
455 (S.N—070000) 5-309
455 (S.N070001— ) 5-310
Circuit tests, common 5-375
Color, wire, abbreviation chart 5-14
Component location
425 (S.N—070000) 5-15
425 (S.N070001— ) 5-16
445 (S.N—070000) 5-125
455 (S.N—070000) 5-267
455 (S.N070001— ) 5-268
Brakes 8-4
Diesel engine 4-17
Engine FD620D 3-8
Hydraulics 9-7
Rear PTO (optional) 6-14
Steering system, all wheel steer 7-5
Compression test 3-44
Compression test, cylinder 4-45
Connecting rod
Bearing clearance check 4-51
Inspection 3-67
Rod and piston assembly 3-67
Side play check 4-51
Wear 3-69
Wear, inspection 3-67
Control arm damper
Disassembly/assembly 6-36
Removal/installation 6-35
Control linkage adjustment, transmission 6-32
Control/fuse module
General troubleshooting
425 5-31
445 5-141
Test
(S.N—070000) 5-381
(S.N070001— ) 5-384
Coolant pump, removal/installation 3-55
Coolant specifications
Diesel and gasoline engine 2-22
Coolant temperature gauge circuit
Diagnosis
425 (S.N—070000) 5-102
425 (S.N070001— ) 5-104
445 (S.N—070000) 5-218
445 (S.N070001— ) 5-220
455 5-334
Test points
425 (S.N—070000) 5-103
425 (S.N070001— ) 5-105
445 (S.N—070000) 5-219
445 (S.N070001— ) 5-221
455 5-335
Coolant temperature sensor test 4-47
Coolant temperature sensor test, 445 5-380
Coolant temperature sensor, replacement 4-55
Cooling fan and bracket 3-56
Cooling system
Operation 3-9, 4-20
Cooling system test 3-49
Cooling system, pressure test 4-48
Crankcase 4-21
Vacuum test 3-45
Crankcase cover
Disassembly 3-63
Crankcase extension housing 4-91
Cranking circuit
Diagnosis
425 (S.N—070000) 5-44
425 (S.N070001— ) 5-48
445 (S.N—070000) 5-158
445 (S.N070001— ) 5-162
455 (S.N—070000) 5-294
455 (S.N070001— ) 5-298
Operation
425 (S.N—070000) 5-40
425 (S.N070001— ) 5-40
445 (S.N—070000) 5-154
445 (S.N070001— ) 5-154
455 (S.N—070000) 5-290
455 (S.N070001— ) 5-290
Schematic
425 (S.N—070000) 5-41
425 (S.N070001— ) 5-42
445 (S.N—070000) 5-155
445 (S.N070001— ) 5-156
455 (S.N—070000) 5-291
455 (S.N070001— ) 5-292
Test points
425 (S.N—070000) 5-45
425 (S.N070001— ) 5-49
445 (S.N—070000) 5-159
445 (S.N070001— ) 5-163
455 (S.N—070000) 5-295
455 (S.N070001— ) 5-299
Crankshaft
Inspection 3-69
Installation 3-70
Journal bushing and seals 3-71
Plain bearings 3-70
Removal 3-69
Wear 3-69
Crankshaft and connecting rod wear 3-67
Crankshaft and main bearings
Inspection/replacement 4-95
Installation 4-93
Removal 4-93
Crankshaft end play check 4-52
Crankshaft extension rear oil seal, replacement 4-92
Crankshaft front oil seal, replacement 4-92
Crankshaft main bearing clearance check 4-53
Crankshaft plain bearings 3-70
Crankshaft rear oil seal, replacement 4-91
Cruise control linkage, check and adjustment 6-33
Cylinder
Lift
Leakage test 9-21
Removal/installation 9-26
Steering
Leakage test 7-18
Removal/installation 7-29
Cylinder block inspection 3-71
Cylinder bore
Deglazing 3-72, 4-97
Inspection 4-97
Reboring 3-72, 4-98
Cylinder compression test 4-45
Cylinder head
Cleaning and inspection 3-60
Components 3-60
Installation 3-63
Removal 3-60
Cylinder head and valves
Disassembly/assembly 4-76
Inspection/replacement 4-77
Removal/installation 4-75
Cylinder Head Removal 3-60
D
Deglazing, cylinder bore 3-72, 4-97
Diagnosis
Brake system 8-7
Charging circuit
425 (S.N—070000) 5-70
425 (S.N070001— ) 5-72
445 (S.N—070000) 5-187
445 (S.N070001— ) 5-189
455 (S.N—070000) 5-305
455 (S.N070001— ) 5-307
Coolant temperature gauge circuit
425 (S.N—070000) 5-102
425 (S.N070001— ) 5-104
445 (S.N—070000) 5-218
445 (S.N070001— ) 5-220
455 5-334
Cranking circuit
425 (S.N—070000) 5-44
425 (S.N070001— ) 5-48
445 (S.N—070000) 5-158
445 (S.N070001— ) 5-162
455 (S.N—070000) 5-294
455 (S.N070001— ) 5-298
Engine system, 425 carbureted engine 3-28
Engine system, diesel 4-28
Engine system, fuel injected engine, 445 3-34
Fuel gauge circuit
425 (S.N—070000) 5-106
425 (S.N0700001—) 5-108
445 (S.N—070000) 5-222
445 (S.N070001— ) 5-224
455 5-336
Fuel injection sensor and diagnostic light circuit
445 (S.N—070000) 5-254
445 (S.N070001— ) 5-260
Fuel injector and fuel pump circuit
445 —070000) 5-236
445 070001— ) 5-242
Fuel pump and carburetor vent/fuel shut-off solenoid circuit
425 (S.N—070000) 5-120
425 (S.N070001— ) 5-122
Fuel pump circuit
455 (S.N—070000) 5-344
455 (S.N070001— ) 5-348
Fuel shut-off solenoid circuit
455 (S.N—070000) 5-358
455 (S.N070001— ) 5-362
Glow plug and light circuit
455 (S.N—070000) 5-370
455 (S.N070001— ) 5-372
Hydraulics 9-16
Hydrostatic transmission 6-20
Ignition circuit
425 (S.N—070000) 5-58
425 (S.N070001— ) 5-62
445 (S.N—070000) 5-172
445 (S.N070001— ) 5-178
Lights circuit
425 (S.N—070000) 5-110
425 (S.N070001— ) 5-112
445 (—070000) 5-226
445 (070001— ) 5-228
455 5-338
Mid-PTO system 6-24
Oil pressure light and hourmeter circuit
425 (S.N—070000) 5-98
425 (S.N070001— ) 5-100
445 (S.N—070000) 5-214
445 (S.N070001— ) 5-216
455 5-332
Power circuit
425 (S.N—070000) 5-36
425 (S.N070001— ) 5-38
445 (S.N—070000) 5-146
445 (S.N070001— ) 5-150
455 (S.N—070000) 5-286
455 (S.N070001— ) 5-288
PTO circuit
425 (S.N—070000) 5-80
425 (S.N070001— ) 5-86
445 (S.N—070000) 5-196
445 (S.N070001— ) 5-202
455 (S.N—070000) 5-314
455 (S.N070001— ) 5-320
Steering system 7-14
Transaxle 6-25
Diagnostic information, general, electrical 5-14
Diesel and gasoline engine coolant
Drain interval 2-22
Specifications 2-22
Diesel control module
Test, 455 5-388
Diesel engine 4-5, 4-18
Diesel engine removal and installation 4-54
Diesel fuel
Lubricity 2-13
Specifications 2-13
Storage 2-13
Diesel module
General, 455 5-281
Differential
(S.N—080000), Disassembly/assembly 6-37
(S.N080001— ), Disassembly/assembly 6-38
Final pinion shaft, inspection 6-40
Linkage
Disassembly/assembly 8-13
Differential lock
Linkage, inspection 6-39
Shaft, disassembly/assembly 6-40
Directional control valves
Disassembly/inspection/assembly 6-40
Removal/installation 6-40
Drain interval, diesel and gasoline engine coolant 2-22
Drive shaft
Disassembly/inspection/assembly 6-41
Removal/installation 6-41
Drive train
Mid-PTO, installation 6-51
Mid-PTO, removal 6-47
Mid-PTO, removal/installation 6-46
Rear PTO, installation 6-51
E
End play check, crankshaft 4-52
Engagement pressure and brake test, Mid-PTO 6-29
Engine
Removal/installation 3-51
Removal/installation, 445 3-52
Engine oil dipstick 3-50
Engine oil pressure test 4-49
Engine oil specifications
4-cycle, diesel 2-14
4-cycle, gasoline 2-15
Engine system
Diagnosis, 425 carbureted engine 3-28
Diagnosis, 445 fuel injected engine 3-34
Diagnosis, diesel 4-28
Test points, 425 carbureted engine 3-29
Test points, 445 fuel injected engine 3-35
Test points, diesel 4-29
Engine system test points 4-29
Exhaust manifold 4-64
F
Face seal fittings torque
With inch stud ends 2-8
With metric stud ends 2-9
Fan belt
455, removal/installation 10-11
Adjustment, 455 4-48
FD620D, removal/installation 10-6
Fan belt tension adjustment, 425, 445 3-48
Fast idle adjustment
CARB/EPA engines 4-34
NON-CARB/EPA engines 4-33
Fast idle adjustment, FD620D 3-43
Field windings 5-404
Final pinion shaft, differential, inspection 6-40
Flow test FD620D 3-47
Flow test, charge pump 6-27
Flow test, fuel transfer pump 4-40
Flywheel 3-57, 4-67
Flywheel housing 4-68
Flywheel plate 4-68
Foot control linkage, disassembly/assembly 6-42
Freeze plugs 4-101
Front axle
Disassembly/assembly 7-30
Removal/installation 7-29
Front pivot, disassembly/assembly 7-35
Fuel and air system components and operation 4-18
Fuel control adjustment
CARB/EPA engines 4-35
NON-CARB/EPA 4-38
Fuel control and governor linkage
Assembly 4-60
Disassembly 4-58
Inspection 4-60
Removal/installation 4-57
Fuel drain back test 4-41
Fuel filter, 455, removal/installation 10-12
Fuel gauge circuit
Diagnosis
425 (S.N—070000) 5-106
425 (S.N070001— ) 5-108
445 (S.N—070000) 5-222
445 (S.N070001— ) 5-224
455 5-336
Test points
425 (S.N—070000) 5-107
425 (S.N070001— ) 5-109
445 (S.N—070000) 5-223
445 (S.N070001— ) 5-225
455 5-337
Fuel gauge sensor, removal/installation 10-9
Fuel injection air system operation, 445 3-13
Fuel injection nozzle test, pintle-type 4-41
Fuel injection nozzl
With metric stud ends 2-9
Fan belt
455, removal/installation 10-11
Adjustment, 455 4-48
FD620D, removal/installation 10-6
Fan belt tension adjustment, 425, 445 3-48
Fast idle adjustment
CARB/EPA engines 4-34
NON-CARB/EPA engines 4-33
Fast idle adjustment, FD620D 3-43
Field windings 5-404
Final pinion shaft, differential, inspection 6-40
Flow test FD620D 3-47
Flow test, charge pump 6-27
Flow test, fuel transfer pump 4-40
Flywheel 3-57, 4-67
Flywheel housing 4-68
Flywheel plate 4-68
Foot control linkage, disassembly/assembly 6-42
Freeze plugs 4-101
Front axle
Disassembly/assembly 7-30
Removal/installation 7-29
Front pivot, disassembly/assembly 7-35
Fuel and air system components and operation 4-18
Fuel control adjustment
CARB/EPA engines 4-35
NON-CARB/EPA 4-38
Fuel control and governor linkage
Assembly 4-60
Disassembly 4-58
Inspection 4-60
Removal/installation 4-57
Fuel drain back test 4-41
Fuel filter, 455, removal/installation 10-12
Fuel gauge circuit
Diagnosis
425 (S.N—070000) 5-106
425 (S.N070001— ) 5-108
445 (S.N—070000) 5-222
445 (S.N070001— ) 5-224
455 5-336
Test points
425 (S.N—070000) 5-107
425 (S.N070001— ) 5-109
445 (S.N—070000) 5-223
445 (S.N070001— ) 5-225
455 5-337
Fuel gauge sensor, removal/installation 10-9
Fuel injection air system operation, 445 3-13
Fuel injection nozzle test, pintle-type 4-41
Fuel injection nozzl
Operation
455 (S.N07000— ) 5-340
455 (S.N—070000) 5-340
Schematic
455 (S.N—070000) 5-341
455 (S.N070001— ) 5-342
Test points
455 (S.N—070000) 5-345
455 (S.N070001— ) 5-349
Fuel pump pressure test
For carburetor, 425 3-47
For fuel injection, 445 3-48
Fuel pump pressure test for carburetor, 425 3-47
Fuel pump transfer pressure test 4-40
Fuel pump, removal/installation 10-9
Fuel shutoff solenoid adjustment 4-43
Fuel shut-off solenoid amperage test, 445 5-391
Fuel shut-off solenoid circuit
Diagnosis
455 (S.N—070000) 5-358
455 (S.N070001— ) 5-362
Operation
455 (S.N—070000) 5-353
455 (S.N070001— ) 5-354
Schematic
455 (S.N—070000) 5-355
455 (S.N070001— ) 5-356
Test points
455 (S.N—070000) 5-359
455 (S.N070001— ) 5-363
Fuel tank sensor test 5-392
Fuel tank, removal/installation 10-8
Fuel transfer pump flow test 4-40
G
Gasoline specifications
4-cycle engines 2-12
Gasoline storage 2-12
Gear case
Rear PTO, removal/installation 6-49
Gear case oil 2-19
Gear transmission grease 2-20
General, diesel engine
General specifications 4-5
Glow plug and light circuit
Diagnosis
455 (S.N—070000) 5-370
455 (S.N070001— ) 5-372
Operation
455 (S.N—070000) 5-366
455 (S.N070001— ) 5-366
Schematic
455 (S.N—070000) 5-367
455 (S.N070001— ) 5-368
Test points
455 (S.N—070000) 5-371
455 (S.N070001— ) 5-373
Glow plugs test, 455 5-393
Governor
Adjustment 3-41
Operation 3-15
Repair 3-58
Ground circuit test
425 and 445 5-393
455 5-394
H
Headlights, adjustment 10-12
Hydraulic control levers and linkage inspection 9-27
Hydraulic control valve
Disassembly/inspection/assembly 9-24
Leakage test 9-22
Linkage adjustment 9-23
Operation, float 9-12
Operation, neutral 9-8
Operation, raise 9-10
Removal/installation 9-24
Hydraulic oil 2-18
Hydraulic oil warm-up procedure 6-29, 7-18, 9-19
Hydraulic system
Diagnosis 9-16
Test points 9-18
Theory of operation 9-6
Hydrostatic power train
Center section and directional control valves, system operation 6-6
Center valve block 6-57
Transaxle oil flow 6-8
Hydrostatic pressure relief valve (40 loader), installation
6-41
Hydrostatic pump, inspection 6-58
Hydrostatic transmission
Diagnosis 6-20
Removal 6-53
Test points 6-23
Troubleshooting 6-16
Hydrostatic transmission motor
Assembly 6-56
Case disassembly/inspection/assembly 6-56
Disassembly 6-55
Removal 6-54
Hydrostatic transmission oil 2-18
I
Idler gear
Inspection/replacement 4-74
Removal/installation 4-74
Ignition circuit
Diagnosis
425 (S.N—070000) 5-58
425 (S.N070001— ) 5-62
445 (S.N—070000) 5-172
445 (S.N070001— ) 5-178
Operation
425 (S.N—07000) 5-53
425 (S.N07001— ) 5-54
445 (S.N—070000) 5-167
445 (S.N070001— ) 5-168
Schematic
425 (S.N—070000) 5-55
425 (S.N070001— ) 5-56
445 (S.N—070000) 5-169
445 (S.N070001— ) 5-170
Test points
425 (S.N—070000) 5-59
425 (S.N070001— ) 5-63
445 (S.N—070000) 5-173
445 (S.N070001— ) 5-179
Ignition coil test 5-395
Ignition module, replace 5-407
Implement relief valve quick test 9-19
Inch fastener torque values 2-7
Indicator lights, gauges, hourmeter, and lights circuit
Operation
425 (S.N—070000) 5-93
425 (S.N070001— ) 5-94
445 (S.N—070000) 5-209
445 (S.N070001— ) 5-210
455 (S.N—070000) 5-326
455 (S.N070001— ) 5-327
Schematic
425 (S.N—070000) 5-95
425 (S.N070001— ) 5-96
445 (S.N—070000) 5-211
445 (S.N070001— ) 5-212
455 (S.N—070000) 5-329
455 (S.N070001— ) 5-330
Injection pump timing adjustment 4-43
Inspection 3-65
Intake manifold 4-64
J
Journal bushings and seals 3-71
K
Knuckle housing, disassembly/assembly 6-62
L
Leakage test
Air intake system 4-31
Hydraulic control valve 9-22
Lift cylinder 9-21
Steering valve and cylinder 7-18
Legend, electrical components
425 (S.N—070000) 5-17
425 (S.N070001— ) 5-17
445 (S.N—070000) 5-127
445 (S.N070001— ) 5-128
455 (S.N—070000) 5-269
455 (S.N070001— ) 5-269
Levers, Hydraulic control, inspection 9-27
Lift cylinder leakage test 9-21
Lift cylinder removal/installation 9-26
Lift cylinder shut-off valve 9-12
Lift linkage, adjustment 10-13
Light switch test 5-395
Lights circuit
Diagnosis
425 (S.N—070000) 5-110
425 (S.N070001— ) 5-112
445 (S.N—070000) 5-226
445 (S.N070001— ) 5-228
455 5-338
Test points
425 (S.N—070000) 5-111
425 (S.N070001— ) 5-113
445 (S.N—070000) 5-227
445 (S.N070001— ) 5-229
455 5-339
Linkage
Brake/differential
Adjustment 8-9
Disassembly/assembly 8-10
Brakes
Disassembly/assembly 8-13
Brakes, adjustment 8-12
Cruise control linkage, check and adjustment 6-33
Differential lock, inspection 6-39
Differential, disassembly/assembly 8-13
Foot control, disassembly/assembly 6-42
Hydraulic control levers, Inspection 9-27
Hydraulic control valve, adjustment 9-23
Intermediate, all wheel steer, installation 7-34
Lift, adjustment 10-13
Rear steering
All wheel steer 7-32
Assembly 7-33
Disassembly 7-33
Installation 7-33
Removal 7-33
Transmission control, adjustment 6-32
Transmission, full forward adjustment 6-33
Lubricant
Alternative 2-21
Mixing 2-21
Storage 2-21
Synthetic 2-21
Lubrication system operation 3-16, 4-22
M
Main bearing clearance check, crankshaft 4-53
Main electrical schematic
425 (S.N—07000) 5-25
425 (S.N—070000) 5-135
425 (S.N070001— ) 5-26, 5-136
455 (S.N—070000) 5-276
455 (S.N070001— ) 5-277
Main wiring harness (W1)
425 (S.N070001— ) 5-20
425 early models (S.N—070000) 5-18
425 late models (S.N—070000) 5-19
445 (S.N—031361) 5-129
445 (S.N031362—031361) 5-130
445 (S.N070001— ) 5-131
455 (S.N031478—070000) 5-272
455 (S.N070001— ) 5-273
455 early models 5-270
455 late models (S.N—031477) 5-271
Metric fastener torque values
Grade 7 2-11
Standard 2-6
Mid-PTO
Diagnosis, system 6-24
Drive train, removal/installation 6-46
Engagement pressure and brake test 6-29
Troubleshooting, system 6-18
Mixing of lubricants 2-21
Motor, starting
425 and 455 5-408
455 5-409
Muffler
455, removal/installation 10-11
FD620D, removal/installation 10-5
O
Oil filter operation 4-23
Oil filters 2-21
Oil flow, hydraulics 9-7
Oil pan and strainer, removal/installation 4-98
Oil pressure light and hour meter circuit test points
455 5-332
Oil pressure light and hourmeter circuit
Diagnosis
425 (S.N—070000) 5-98
425 (S.N070001— ) 5-100
445 (S.N—070000) 5-214
445 (S.N070001— ) 5-216
455 5-332
Test points
425 (S.N—070000) 5-99
425 (S.N070001— ) 5-101
445 (S.N—070000) 5-215
445 (S.N070001— ) 5-217
455 5-333
Oil pressure regulating valve
Operation 4-23
Removal/installation 4-101
Oil pressure sensor switch test 5-395
Oil pressure test
Engines with oil pressure switch ports 3-45
Engines without oil pressure switch ports 3-46
Oil pump
Disassembly/assembly 3-73, 4-99
Inspection 3-73, 4-100
Removal/installation 3-72, 4-99
O-ring boss fittings 2-10
O-ring face seal fittings 2-10
P
Piston 3-65
Inspection 3-65
Removal 3-63
Ring end gap 3-64
Ring removal and installation 3-64
Ring wear 3-64
Piston and connecting rod
Assembly 4-87
Disassembly 4-87
Inspection/replacement 4-88
Installation 4-86
Removal 4-85
Piston-to-cylinder head clearance, measure 4-84
Power circuit
Diagnosis
425 (S.N—070000) 5-36
425 (S.N070001— ) 5-38
445 (S.N—070000) 5-146
445 (S.N070001— ) 5-150
455 (S.N—070000) 5-286
455 (S.N070001— ) 5-288
Operation
425 (S.N—070000) 5-32
425 (S.N070001— ) 5-32
445 (S.N—070000) 5-142
445 (S.N070001— ) 5-142
455 (S.N—070000) 5-282
455 (S.N070001— ) 5-282
Schematic
425 (S.N—070000) 5-33
425 (S.N070001— ) 5-34
445 (S.N—070000) 5-143
445 (S.N070001— ) 5-144
455 (S.N—070000) 5-283
455 (S.N070001— ) 5-284
Test points
425 (S.N—070000) 5-36, 5-37
425 (S.N070001— ) 5-39
445 (S.N—070000) 5-147
445 (S.N070001— ) 5-151
455 (S.N—070000) 5-287
455 (S.N070001— ) 5-289
Power train, system operation, external 6-10
Powertrain, hydraulic schematic 9-28
Pressure regulator, fuel injector, 445 3-57
Pressure relief valve, hydrostatic (40 loader) 6-41
Pressure test
Cooling system 4-48
Fuel pump, 425 3-47
Fuel pump, 445 3-48
Fuel transfer pump 4-40
Radiator cap 4-44
Pressure test, charge 6-28
PTO
Brake
Disassembly/inspection/assembly 6-45
Removal/installation 6-44
Mid
Drive train, installation 6-51
Drive train, removal 6-47
Rear
Drive train, installation 6-51
Drive train, removal 6-47
Relief valve
Disassembly/inspection/assembly 6-44
Removal/installation 6-44
Solenoid valve
Disassembly/assembly 6-43
Removal/installation 6-43
PTO circuit
Diagnosis
425 (S.N—070000) 5-80
425 (S.N070001— ) 5-86
445 (S.N—070000) 5-196
445 (S.N070001— ) 5-202
455 (S.N—070000) 5-314
455 (S.N070001— ) 5-320
Operation
425 (S.N—070000) 5-74
425 (S.N070001— ) 5-75
445 (S.N—070000) 5-191
445 (S.N070001— ) 5-192
455 (S.N—070000) 5-309
455 (S.N070001— ) 5-310
Schematic
425 (S.N—032776) 5-77
425 (S.N032777—070000) 5-77
425 (S.N070001— ) 5-78
445 (S.N—070000) 5-193
445 (S.N070001— ) 5-194
455 (S.N031478—070000) 5-312
455 (S.N—070000) 5-311
455 (S.N070001— ) 5-313
Test points
425 (S.N—070000) 5-81
425 (S.N070001— ) 5-87
445 (S.N—070000) 5-197
445 (S.N070001— ) 5-203
455 (S.N—070000) 5-315
455 (S.N070001— ) 5-321
PTO clutch 6-52
PTO switch test
(S.N—070000) 5-396
(S.N070001— ) 5-397
Pulser coil test 5-397
Pulser coils, replace, 425 and 445 5-407
Push rod inspection 3-62
Q
Quick test, electrical system
425 (S.N—070000) 5-27
425 (S.N070001— ) 5-28
445 5-137
455 5-278
R
Radiator bubble test 4-44
Radiator bubble test, 425, 445 3-49
Radiator cap pressure test 3-49, 4-44
Radiator, removal/installation 10-7
Rear axle assembly
All wheel steer, disassembly/assembly 6-60
Removal/installation 6-59
Two wheel steer, disassembly, assembly 6-59
Rear pivot, disassembly/assembly 7-35
Rear PTO
540 6-15
Drive train, removal 6-47
Gear case, removal/installation 6-49
Operation 6-14
Rear PTO wiring harness (W2)
425 early models 5-21
425 later models 5-22
445 (S.N—031361) 5-133
445 (S.N031362— ) 5-134
445 Early models 5-132
455 early models 5-274
455 later models 5-275
Rear steering
Linkage
All wheel steer 7-32
Assembly 7-33
Disassembly 7-33
Installation 7-33
Removal 7-33
Reboring, cylinder 3-72, 4-98
Regulated amperage test, 455 5-398
Regulated voltage test, 455 5-398
Regulator, voltage, replacement, 455 (40-Amp) 5-414
Relay test 5-399
Ring end gap 3-64
Ring removal and installation 3-64
Ring wear 3-64
Rocker arm assembly 4-70
Rocker arm cover 4-69
S
Schematic
Charging circuit
425 (—070000) 5-67
425 (070001— ) 5-68
445 (S.N—070000) 5-185
445 (S.N070001— ) 5-186
455 (S.N—070000) 5-303
455 (S.N070001— ) 5-304
Cranking circuit
425 (S.N—070000) 5-41
425 (S.N070001— ) 5-42
445 (S.N—070000) 5-155
445 (S.N070001— ) 5-156
455 (S.N—070000) 5-291
455 (S.N070001— ) 5-292
Fuel injection sensor and diagnostic light circuit
445 (S.N—070000) 5-251
445 (S.N070001— ) 5-252
Fuel injector and fuel pump circuit
445 —070000) 5-233
445 070001— ) 5-234
Fuel pump and carburetor vent/fuel shut-off solenoid circuit
425 (S.N—070000) 5-117
425 (S.N070001— ) 5-118
Fuel pump circuit
455 (S.N—070000) 5-341
455 (S.N070001— ) 5-342
Fuel shut-off solenoid circuit
455 (S.N—070000) 5-355
455 (S.N070001— ) 5-356
Glow plug and light circuit
455 (S.N—070000) 5-367
455 (S.N070001— ) 5-368
Hydraulic, power train 9-28
Ignition circuit
425 (S.N—070000) 5-55
425 (S.N070001— ) 5-56
445 (S.N—070000) 5-169
445 (S.N070001— ) 5-170
Indicator lights, gauges, hourmeter, and lights circuit
425 (S.N—070000) 5-95
425 (S.N070001— ) 5-96
445 (S.N—070000) 5-211
445 (S.N070001— ) 5-212
455 (S.N—070000) 5-329
455 (S.N070001— ) 5-330
Main electrical
425 (S.N—070000) 5-25
425 (S.N070001— ) 5-26
445 (S.N—070000) 5-135
445 (S.N070001— ) 5-136
455 (S.N—070000) 5-276
455 (S.N070001— ) 5-277
Power circuit
425 (S.N—070000) 5-33
425 (S.N070001— ) 5-34
445 (S.N—070000) 5-143
445 (S.N070001— ) 5-144
455 (S.N—070000) 5-283
455 (S.N070001— ) 5-284
PTO circuit
425 (S.N—032776) 5-77
425 (S.N032777—070000) 5-77
425 (S.N070001— ) 5-78
445 (S.N—070000) 5-193
445 (S.N070001— ) 5-194
455 (S.N031478—070000) 5-312
455 (S.N—070000) 5-311
455 (S.N070001— ) 5-313
Seat switch test 5-400
Service recommendations
O-ring boss fittings 2-10
O-ring face seal fittings 2-10
Shaft
Drive, disassembly/inspection/assembly 6-41
Drive, removal/installation 6-41
Shaft, differential lock, disassembly/assembly 6-40
Shaft, final pinion, differential, inspection 6-40
Slow idle adjustment 4-33
425 CARB/EPA engine 3-42
NON-CARB/EPA FD620D 3-41
Spark plug cap test 5-405
Spark test 5-406
Specifications 4-5
Brakes
General 8-3
Repair 8-3
Diesel engine
Repair 4-7
Test and adjustment 4-5
Electrical
General 5-11
Repair 5-12
Test and adjustment 5-11
Gasoline engine
General 3-3
Repair 3-4
Hydraulic
General 9-3
Repair 9-3
Test and adjustment 9-3
Miscellaneous
Repair 10-3
Power train
General 6-3
Repair 6-3
Test and adjustment 6-3
Specifications 3-68
Steering
General 7-3
Repair 7-3
Test and adjustment 7-3
Starter solenoid, 455 5-412
Starting motor
Armature test 5-404
Condition 5-402
Field windings test 5-404
Repair
425 and 455 5-408
455 5-409
System test 5-401
Stator, replace, 425 and 445 5-407
Steering
Column, removal/installation 7-22
Cylinder, leakage test 7-18
Cylinder, removal/installation 7-29
Front and rear pivots, disassembly/assembly 7-35
Intermediate, linkage
all wheel steer, installation 7-34
Rear, linkage
All wheel steer 7-32
Assembly 7-33
Disassembly 7-33
Installation 7-33
Removal 7-33
Steering system
Diagnosis 7-14
Operation, all wheel steer 7-4
Test points 7-15
Steering valve
Disassembly/assembly 7-24
Leakage test 7-18
Operation, manual 7-10
Operation, neutral 7-7
Operation, turning 7-8, 7-9
Removal/installation 7-23
Synthetic lubricants 2-21
T
Tappets
Removal and installation 3-69
Test points
Brake system 8-8
Charging circuit
425 (S.N—070000) 5-71
425 (S.N070001— ) 5-73
445 (S.N—070000) 5-188
445 (S.N070001— ) 5-190
455 (S.N—070000) 5-306
455 (S.N070001— ) 5-308
Coolant temperature gauge circuit
425 (S.N—070000) 5-103
425 (S.N070001— ) 5-105
445 (S.N—070000) 5-219
445 (S.N070001— ) 5-221
455 5-335
Cranking circuit
425 (S.N—070000) 5-45
425 (S.N070001— ) 5-49
445 (S.N—070000) 5-159
445 (S.N070001— ) 5-163
455 (S.N—070000) 5-295
455 (S.N070001— ) 5-299
Engine system
425 carbureted engine 3-29
445 fuel injected engine 3-35
Diesel 4-29
Fuel gauge circuit
425 (S.N—070000) 5-107
425 (S.N0700001—) 5-109
445 (S.N—070000) 5-223
445 (S.N070001— ) 5-225
455 5-337
Fuel injection sensor and diagnostic light circuit
445 (S.N—070000) 5-255
445 (S.N070001— ) 5-261
Fuel injector and fuel pump circuit
445 —070000) 5-237
445 070001— ) 5-243
Fuel pump and carburetor vent/fuel shut-off solenoid circuit
425 (S.N—070000) 5-121
425 (S.N070001— ) 5-123
Fuel pump circuit
455 (S.N—070000) 5-345
455 (S.N070001— ) 5-349
Fuel shut-off solenoid circuit
455 (S.N—070000) 5-359
455 (S.N070001— ) 5-363
Glow plug and light circuit
455 (S.N—070000) 5-371
455 (S.N070001— ) 5-373
Hydraulic system 9-18
Hydrostatic transmission 6-23
Ignition circuit
425 (S.N—070000) 5-59
425 (S.N070001— ) 5-63
445 (S.N—070000) 5-173
445 (S.N070001— ) 5-179
Lights circuit
425 (S.N—070000) 5-111
425 (S.N070001— ) 5-113
445 (—070000) 5-227
445 (070001— ) 5-229
455 5-339
Oil pressure light and hourmeter circuit
425 (S.N—070000) 5-99
425 (S.N070001— ) 5-101
445 (S.N—070000) 5-215
445 (S.N070001— ) 5-217
455 5-333
Power circuit
425 (S.N—070000) 5-36, 5-37
425 (S.N070001— ) 5-39
445 (S.N—070000) 5-147
445 (S.N070001— ) 5-151
455 (S.N—070000) 5-287
455 (S.N070001— ) 5-289
PTO circuit
425 (S.N—070000) 5-81
425 (S.N070001— ) 5-87
445 (S.N—070000) 5-197
445 (S.N070001— ) 5-203
455 (S.N—070000) 5-315
455 (S.N070001— ) 5-321
Steering system 7-15
Transaxle 6-26
General, electrical 5-13
Theory of operation information
General, electrical 5-14
Thermostat opening test 3-49, 4-45
Thermostat Test 425 445 3-49
Thermostat, replacement 4-55
Throttle
Cable adjustment 4-32
Lever friction adjustment 4-32
Throttle body operation 3-17
Throttle body repair, 445 3-59
Throttle cable adjustment 3-40
Throttle lever adjustment, FD620D 3-40
Tilt steering rod, removal/installation 7-23
Timing gear backlash check, late models 4-50
Timing gear cover, removal/installation 4-72
Timing gear housing, removal/installation 4-73
Toe-in adjustment
All wheel steer
Front axle 7-20
Rear axle 7-21
Two wheel steer 7-19
Torque values
Face seal fittings
With inch stud ends 2-8
With metric stud ends 2-9
Inch fasteners 2-7
Metric fastener, grade 7 2-11
Metric fasteners, standard 2-6
Non-standard fasteners
Brakes 2-5
Diesel engine 2-4
Gasoline engines 2-3
Hydraulics 2-5
Power train, hydrostatic 2-5
Steering 2-5
Straight fitting or special nut 2-11
Transaxle
Assembly 6-68
Case, inspection 6-67
Diagnosis 6-25
Disassembly 6-64
Internal system operation 6-13
Oil flow system operation 6-9
Removal/installation 6-63
Right cover, disassembly/assembly 6-67
Test points 6-26
Troubleshooting 6-19
Transmission
Control linkage adjustment 6-32
Linkage full forward adjustment 6-33
Neutral adjustment 6-31
Transmission oil, hydrostatic 2-18
Troubleshooting chart
425 carbureted engine 3-18
445 fuel injected engine 3-23
Brake system 8-6
Diesel engine 4-25
Electrical system
425 5-29
445 5-138
455 5-279
Hydrostatic transmission 6-16
Mid-PTO system 6-18
Steering system 7-12
Transaxle 6-19
U
Unregulated amperage test, 455 5-399
V
Vacuum test, crankcase 3-45
Valve
Hydraulic control
Leakage test 9-22
Linkage adjustment 9-23
Operation, float 9-12
Operation, neutral 9-8
Operation, raise 9-10
Removal/installation 9-24
Implement relief, quick test 9-19
Lift cylinder shut-off 9-12
Oil pressure regulating, removal/installation 4-101
PTO relief, disassembly/inspection/assembly 6-44
PTO relief, removal/installation 6-44
PTO solenoid, disassembly/assembly 6-43
PTO solenoid, removal/installation 6-43
Steering
Disassembly/assembly 7-24
Operation, manual 7-10
Operation, neutral 7-7
Operation, turning 7-9
Removal/installation 7-23
Valve clearance, check and adjustment 3-44, 4-46
Valve lift check 4-47
Valve seat and guide inspection 3-61
Valve seats, grinding 4-80
Valve spring free length 3-62
Valves, lapping 4-80
Voltage regulator, replacement, 455 (40-Amp) 5-414
W
Warm-up procedure
Hydraulic oil 7-18, 9-19
Warm-up procedure, hydraulic oil 6-29
Water pump
Assembly 4-65
Disassembly 4-65
Removal/installation 4-65
Wire color abbreviation chart 5-14
Wiring harness
Main (W1)
425 (S.N070001— ) 5-20
425 early models (S.N—070000) 5-18
425 late models (S.N—070000) 5-19
445 (S.N—031361) 5-129
445 (S.N031362—031361) 5-130
445 (S.N070001— ) 5-131
455 (S.N031478—070000) 5-272
455 (S.N070001— ) 5-273
455 early models 5-270
455 late models (S.N—031477) 5-271
Rear PTO (W2)
425 early models 5-21
425 later models 5-22
445 (S.N—031361) 5-133
445 (S.N031362— ) 5-134
445 Early models 5-132
455 early models 5-274
455 later models 5-275