John Deere 316 318 & 420 Lawn & Garden Tractors Service Manual – PDF DOWNLOAD

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John Deere 316 318 & 420 Lawn & Garden Tractors Service Manual – PDF DOWNLOAD

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John Deere 316 318 & 420 Lawn & Garden Tractors Service Manual – PDF DOWNLOAD

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TABLE OF CONTENTS:

John Deere 316 318 & 420 Lawn & Garden Tractors Service Manual – PDF DOWNLOAD

TM1590 – 316,318,420 Lawn & Garden Tractors………………………………………………… 1
CONTENTS……………………………………………………………………………. 2
Section 10 – GENERAL INFORMATION …………. 9
Safety …………………. 11
RECOGNIZE SAFETY INFORMATION…………………………………………………… 11
UNDERSTAND SIGNAL WORDS……………………………………………………….. 11
FOLLOW SAFETY INSTRUCTIONS…………………………………………………….. 11
HANDLE FLUIDS SAFELY—AVOID FIRES……………………………………………….. 12
PREVENT BATTERY EXPLOSIONS…………………………………………………….. 12
PREPARE FOR EMERGENCIES……………………………………………………….. 12
PREVENT ACID BURNS……………………………………………………………. 13
HANDLE CHEMICAL PRODUCTS SAFELY………………………………………………… 14
AVOID HIGH-PRESSURE FLUIDS…………………………………………………….. 14
PREPARE MACHINE FOR REPAIR…………………………………………………….. 15
SUPPORT MACHINE PROPERLY………………………………………………………. 15
WEAR PROTECTIVE CLOTHING………………………………………………………. 16
WORK IN CLEAN AREA……………………………………………………………. 16
SERVICE MACHINES SAFELY……………………………………………………….. 16
WORK IN VENTILATED AREA……………………………………………………….. 17
ILLUMINATE WORK AREA SAFELY……………………………………………………. 17
REPLACE SAFETY SIGNS………………………………………………………….. 17
USE PROPER LIFTING EQUIPMENT…………………………………………………… 17
REMOVE PAINT BEFORE WELDING OR HEATING………………………………………….. 18
AVOID HEATING NEAR PRESSURIZED FLUID LINES………………………………………. 18
SERVICE TIRES SAFELY………………………………………………………….. 19
AVOID HARMFUL ASBESTOS DUST……………………………………………………. 19
PRACTICE SAFE MAINTENANCE……………………………………………………… 20
USE PROPER TOOLS……………………………………………………………… 20
DISPOSE OF WASTE PROPERLY……………………………………………………… 21
LIVE WITH SAFETY……………………………………………………………… 21
General Specifications …………………. 23
MACHINE SPECIFICATIONS………………………………………………………… 23
Repair Specifications …………………. 27
REPAIR SPECIFICATIONS…………………………………………………………. 27
METRIC BOLT AND CAP SCREW TORQUE VALUES…………………………………………. 30
UNIFIED INCH BOLT AND CAP SCREW TORQUE VALUES……………………………………. 31
METRIC CAP SCREW TORQUE VALUES—GRADE 7………………………………………….. 32
SERVICE RECOMMENDATIONS FOR O-RING BOSS FITTINGS…………………………………. 33
SERVICE RECOMMENDATIONS FOR FLAT FACE O-RING SEAL FITTINGS………………………… 34
TUBE AND HOSE FITTING, 37 FLARE AND 30 CONE SEAT CONNECTOR SERVICE RECOMMENDATIONS…. 35
Test and Adjustment Specifications …………………. 37
TEST AND ADJUSTMENT SPECIFICATIONS……………………………………………… 37
Fuels and Lubricants …………………. 39
FUEL………………………………………………………………………… 39
STORING FUEL…………………………………………………………………. 39
ENGINE OIL…………………………………………………………………… 40
TRANSMISSION AND HYDRAULIC OIL…………………………………………………. 41
GREASE………………………………………………………………………. 42
MOWER DECK GEAR CASE OIL………………………………………………………. 42
ALTERNATIVE AND SYNTHETIC LUBRICANTS……………………………………………. 43
LUBRICANT STORAGE…………………………………………………………….. 43
MIXING OF LUBRICANTS………………………………………………………….. 43
Serial Number Locations …………………. 45
SERIAL NUMBERS……………………………………………………………….. 45
PRODUCT IDENTIFICATION NUMBER………………………………………………….. 45
ENGINE SERIAL NUMBER………………………………………………………….. 45
TRANSMISSION SERIAL NUMBER…………………………………………………….. 45
DIFFERENTIAL SERIAL NUMBER…………………………………………………….. 46
CONTROL VALVE SERIAL NUMBER……………………………………………………. 46
Section 20 – ENGINE REPAIR …………. 47
Engine …………………. 49
ONAN ENGINE REPAIR—USE CTM2……………………………………………………. 49
REMOVE AND INSTALL ENGINE……………………………………………………… 49
Section 40 – ELECTRICAL REPAIR …………. 51
Front PTO Clutch …………………. 53
REMOVE FRONT PTO CLUTCH……………………………………………………….. 53
DISASSEMBLE, INSPECT AND ASSEMBLE FRONT PTO CLUTCH……………………………….. 54
INSTALL FRONT PTO CLUTCH………………………………………………………. 56
Section 50 – POWER TRAIN REPAIR …………. 59
Transmission …………………. 61
SERVICE PARTS KITS……………………………………………………………. 61
REMOVE AND INSTALL CHARGE PUMP…………………………………………………. 62
DISASSEMBLE AND INSPECT CHARGE PUMP…………………………………………….. 63
ASSEMBLE CHARGE PUMP………………………………………………………….. 64
REMOVE AND INSTALL CHARGE RELIEF VALVE………………………………………….. 65
REMOVE AND INSTALL IMPLEMENT RELIEF VALVE……………………………………….. 66
REMOVE TRANSMISSION…………………………………………………………… 66
DISASSEMBLE TRANSMISSION COVER…………………………………………………. 71
DISASSEMBLE PUMP AND MOTOR…………………………………………………….. 74
DISASSEMBLE PUMP AND MOTOR HOUSING……………………………………………… 76
ASSEMBLE PUMP AND MOTOR HOUSING………………………………………………… 79
ASSEMBLE PUMP AND MOTOR……………………………………………………….. 81
ASSEMBLE TRANSMISSION COVER……………………………………………………. 82
INSTALL TRANSMISSION………………………………………………………….. 85
Transmission Control Linkage …………………. 91
INSPECT AND REPAIR TRANSMISSION CONTROL LINKAGE—VERSION ONE (ALL MODELS)……………. 91
INSPECT AND REPAIR TRANSMISSION CONTROL LINKAGE—VERSION TWO (316 AND 318)…………… 92
INSPECT AND REPAIR TRANSMISSION CONTROL LINKAGE—VERSION TWO (420)………………….. 93
INSPECT AND REPAIR TRANSMISSION CONTROL LINKAGE—VERSION THREE (ALL MODELS)………….. 94
INSPECT AND REPAIR TRANSMISSION CONTROL LINKAGE—VERSION FOUR (ALL MODELS)…………… 95
INSPECT AND REPAIR DIFFERENTIAL LOCK AND TWO-SPEED CONTROL LINKAGE (420)……………. 96
Differential …………………. 97
SERVICE PARTS KITS……………………………………………………………. 97
REMOVE AND INSTALL DIFFERENTIAL………………………………………………… 98
DISASSEMBLE AND INSPECT DIFFERENTIAL……………………………………………. 98
ASSEMBLE DIFFERENTIAL………………………………………………………….108
Rear Axles ………………….117
REMOVE AXLE…………………………………………………………………..117
INSTALL AXLE………………………………………………………………….120
Drive Shaft ………………….125
REMOVE AND INSTALL DRIVE SHAFT—316………………………………………………125
REMOVE AND INSTALL DRIVE SHAFT—318 AND 420……………………………………….126
DISASSEMBLE AND INSPECT DRIVE SHAFT……………………………………………..127
ASSEMBLE DRIVE SHAFT…………………………………………………………..128
Section 60 – STEERING AND BRAKE REPAIR ………….131
Steering¯316 ………………….133
SPECIAL OR ESSENTIAL TOOLS……………………………………………………..133
SERVICE PARTS KITS…………………………………………………………….133
REMOVE AND INSTALL STEERING GEARBOX AND SHAFT…………………………………….134
DISASSEMBLE AND INSPECT STEERING GEARBOX AND SHAFT………………………………..138
ASSEMBLE STEERING GEARBOX AND SHAFT……………………………………………..144
Steering¯318 and 420 ………………….151
SERVICE PARTS KITS…………………………………………………………….151
REMOVE AND INSTALL STEERING VALVE AND COLUMN……………………………………..152
DISASSEMBLE AND INSPECT STEERING VALVE AND COLUMN…………………………………153
ASSEMBLE STEERING VALVE AND COLUMN………………………………………………162
REMOVE AND INSTALL STEERING CYLINDER…………………………………………….172
Brakes ………………….173
REMOVE BRAKES…………………………………………………………………174
INSTALL BRAKES………………………………………………………………..177
ADJUST BRAKES…………………………………………………………………179
INSPECT AND REPAIR BRAKE PEDAL AND NEUTRAL RETURN LINKAGE—316………………………180
INSPECT AND REPAIR BRAKE PEDALS AND NEUTRAL RETURN LINKAGE—318……………………..185
INSPECT AND REPAIR BRAKE PEDALS AND NEUTRAL RETURN LINKAGE—420……………………..191
INSPECT AND REPAIR PARK BRAKE LEVER……………………………………………..196
Section 70 – HYDRAULIC REPAIR ………….197
Hydraulic Control Valve ………………….199
SERVICE PARTS KITS…………………………………………………………….199
REMOVE AND INSTALL HYDRAULIC CONTROL VALVE—316 AND 318…………………………….200
REMOVE AND INSTALL HYDRAULIC CONTROL VALVE—420……………………………………202
DISASSEMBLE, INSPECT AND ASSEMBLE HYDRAULIC CONTROL VALVE—SINGLE-SPOOL………………203
DISASSEMBLE, INSPECT AND ASSEMBLE HYDRAULIC CONTROL VALVE—TWO-SPOOL…………………204
DISASSEMBLE, INSPECT AND ASSEMBLE HYDRAULIC CONTROL VALVE—THREE-SPOOL……………….207
Section 80 – MISCELLANEOUS REPAIR ………….209
Front Axle ………………….211
SPECIAL OR ESSENTIAL TOOLS……………………………………………………..211
REMOVE AND INSTALL FRONT AXLE—316 AND 318………………………………………..211
INSPECT AND REPLACE PIVOT BUSHINGS—316 AND 318……………………………………212
REMOVE FRONT AXLE—420………………………………………………………….212
DISASSEMBLE AND INSPECT PIVOT PIN—420……………………………………………214
ASSEMBLE PIVOT PIN—420…………………………………………………………216
INSTALL FRONT AXLE—420…………………………………………………………217
REMOVE AND INSTALL SPINDLES…………………………………………………….219
INSPECT AND REPLACE SPINDLE BUSHINGS…………………………………………….221
INSPECT AND REPLACE WHEEL BEARINGS………………………………………………222
ADJUST TOE-IN…………………………………………………………………222
Mower Spindle and Jack Sheave Repair ………………….225
SERVICE MOWER BLADE SPINDLES—38 (EARLY), 46 AND 50-INCH MOWER………………………225
SERVICE MOWER BLADE SPINDLES—38-INCH MOWER (LATER)………………………………..225
SERVICE MOWER BLADE SPINDLES—EARLY 60-INCH AND 260 ROTARY MOWER…………………….226
SERVICE MOWER BLADE SPINDLES—LATER 60-INCH AND 260 ROTARY MOWER…………………….227
SERVICE MOWER BLADE JACK SHEAVES—46 AND 50-INCH MOWER……………………………..228
Mower Gear Case Repair ………………….229
DISASSEMBLE AND INSPECT MOWER GEAR CASE—50-INCH MOWER……………………………..229
ASSEMBLE MOWER GEAR CASE—50-INCH MOWER…………………………………………..234
DISASSEMBLE AND INSPECT MOWER GEAR CASE—EARLY 60-INCH MOWER (CURTIS)………………..238
ASSEMBLE MOWER GEAR CASE—EARLY 60-INCH MOWER (CURTIS)……………………………..242
DISASSEMBLE AND INSPECT MOWER GEAR CASE—LATER 60-INCH MOWER (PEERLESS)………………247
ASSEMBLE MOWER GEAR CASE—LATER 60-INCH MOWER (PEERLESS)……………………………251
DISASSEMBLE AND INSPECT MOWER GEAR CASE—260 ROTARY MOWER…………………………..255
ASSEMBLE MOWER GEAR CASE—260 ROTARY MOWER………………………………………..260
Section 220 – ENGINE, FUEL AND AIR SYSTEM CHECKOUT AND DIAGNOSIS …………265
Engine, Fuel and Air System Checkout ………………….267
BEFORE YOU START………………………………………………………………267
Diagnosis, Tests and Adjustments ………………….271
ABOUT THIS GROUP………………………………………………………………271
Section 240 – ELECTRICAL CHECKOUT, OPERATION AND DIAGNOSIS …………285
Electrical System Checkout ………………….287
BEFORE YOU START………………………………………………………………287
Electrical Schematics ………………….293
316, 318 AND 420 ELECTRICAL SCHEMATIC—SINGLE PTO………………………………….294
316, 318 AND 420 ELECTRICAL SCHEMATIC—DUAL PTO……………………………………301
Component Location and Operation ………………….303
ELECTRICAL COMPONENT LOCATION…………………………………………………..303
STARTING CIRCUIT OPERATION……………………………………………………..304
IGNITION CIRCUIT OPERATION……………………………………………………..306
PTO CIRCUIT OPERATION………………………………………………………….308
CHARGING CIRUIT OPERATION………………………………………………………310
OIL PRESSURE LAMP CIRCUIT OPERATION……………………………………………..312
Electrical System Diagnosis ………………….313
ABOUT THIS GROUP………………………………………………………………313
Electrical System Component Tests and Adjustments ………………….341
BEFORE YOU START………………………………………………………………341
Section 250 – POWER TRAIN CHECKOUT, OPERATION AND DIAGNOSIS …………351
Power Train Checkout ………………….353
BEFORE YOU START………………………………………………………………353
Theory of Operation ………………….357
HYDROSTATIC TRANSMISSION OPERATION………………………………………………358
Diagnosis, Tests and Adjustments ………………….361
Troubleshooting Guide………………………………………………………….361
charge pressure test…………………………………………………………..366
implement relief pressure test………………………………………………….367
charge pump flow test………………………………………………………….368
steering valve neutral check……………………………………………………369
hydro neutral return linkage adjustment………………………………………….370
later version hydro neutral return adjustment…………………………………….374
2 speed linkage check………………………………………………………….377
differential lock linkage check…………………………………………………377
Section 260 – STEERING AND BRAKES CHECKOUT, OPERATION AND DIAGNOSIS …………379
Steering And Brakes System Checkout ………………….381
BEFORE YOU START………………………………………………………………381
Theory of Operation ………………….385
STEERING VALVE/SYSTEM OPERATION—FOUR-PORT VALVE…………………………………..385
STEERING VALVE/SYSTEM OPERATION—FIVE-PORT VALVE…………………………………..386
Diagnosis, Tests and Adjustments ………………….389
Troubleshooting guide………………………………………………………….389
steering system leakage test……………………………………………………393
Section 270 – HYDRAULIC SYSTEM CHECKOUT, OPERATION AND DIAGNOSIS …………395
Hydraulic System Checkout ………………….397
hydraulic control valve check…………………………………………………..398
Hydraulic Schematics ………………….399
HYDRAULIC SYSTEM SCHEMATICS…………………………………………………….399
HYDRAULIC CIRCUIT SYMBOLS………………………………………………………400
LEGEND FOR HYDRAULIC SYSTEM SCHEMATIC—316………………………………………..402
LEGEND FOR HYDRAULIC SYSTEM SCHEMATIC—EARLY 318…………………………………..409
LEGEND FOR HYDRAULIC SYSTEM SCHEMATIC—LATER 318…………………………………..410
LEGEND FOR HYDRAULIC SYSTEM SCHEMATIC—EARLY 420…………………………………..417
LEGEND FOR HYDRAULIC SYSTEM SCHEMATIC—LATER 420…………………………………..418
Theory of Operation ………………….423
HYDRAULIC LIFT SYSTEM OPERATION—THREE-POSITION SPOOL………………………………423
HYDRAULIC LIFT SYSTEM OPERATION—FOUR-POSITION SPOOL……………………………….424
Diagnosis, Tests and Adjustments ………………….425
Troubleshooting guide………………………………………………………….426
rockshaft cylinder leakage test…………………………………………………429
control valve leakage test……………………………………………………..430
test implement relief pressure………………………………………………….431
bleed hydraulic system…………………………………………………………432
Section 299 – DEALER FABRICATED TOOLS …………433
Dealer Fabricated Tools ………………….435
DFMX1 STEERING VALVE FIXTURE……………………………………………………435
DFMX2 ALIGNMENT SHIMS………………………………………………………….435
Index……………………………………………………………………………….437
A……………………………………………………………………………….437
Alternator, Tests …………345
B……………………………………………………………………………….437
Battery, Charge and Test …………313
Bleed Hydraulic System …………432
Brake Neutral Start ………………………………………….289
Check ………………………………………….289
Safety Switch, Test ………………………………………….337
Brake Pedal Linkage ………………………………………….180
316 ………………………………………….180
318 ………………………………………….185
420 ………………………………………….191
Brakes ………………………………………….179
Adjust ………………………………………….179
Install ………………………………………….177
Remove ………………………………………….174
C……………………………………………………………………………….437
Charge Pump …………………………………………. 64
Assemble …………………………………………. 64
Disassemble and Inspect …………………………………………. 63
Flow Test ………………………………………….368
Pressure Test ………………………………………….365
Remove and Install …………………………………………. 62
Suction Line Check ………………………………………….366
Charge Relief Valve ………………………………………….366
Adjustment ………………………………………….366
Check ………………………………………….366
Remove and Install …………………………………………. 65
Check Valve Debris Check …………365
Choke Cable Adjustment …………277
Choke Lever Check …………268
Circuit Breaker, Test …………341
Crankcase Vacuum Test …………281
D……………………………………………………………………………….437
Dash Lamp Circuit ………………………………………….287
Check ………………………………………….287
Tests ………………………………………….316
Dashpot Adjustment (B43E, B43G and B48G) …………279
Dealer Fabricated Tools ………………………………………….435
DFMX1 Steering Valve Fixture ………………………………………….435
DFMX2 Alignment Shims ………………………………………….435
Differential ………………………………………….108
Assemble ………………………………………….108
Disassemble and Inspect …………………………………………. 98
Remove and Install …………………………………………. 98
Differential Lock (420) ………………………………………….355
Check ………………………………………….355
Linkage Check ………………………………………….377
Differential Lock Linkage (420) ………… 96
Drive Shaft ………………………………………….128
Assemble ………………………………………….128
Disassemble and Inspect ………………………………………….127
Remove and Install—316 ………………………………………….125
Remove and Install—318 and 420 ………………………………………….126
E……………………………………………………………………………….437
Electrical Component Location …………303
Electrical Schematics ………………………………………….298
Dual PTO ………………………………………….298
Single PTO ………………………………………….295
Electrical System Grounds, Verify …………313
Electrical—Theory Of Operation ………………………………………….310
Charging Circuit ………………………………………….310
Engine Oil Pressure Lamp Circuit ………………………………………….312
Ignition Circuit ………………………………………….306
PTO Circuit ………………………………………….308
Starting Circuit ………………………………………….304
Engine ………………………………………….282
Compression Pressure Test ………………………………………….282
Oil …………………………………………. 40
Oil and Leak Check ………………………………………….267
Oil Pressure Check ………………………………………….268
Oil Pressure Test ………………………………………….282
Performance Check ………………………………………….268
Remove and install …………………………………………. 49
Repair …………………………………………. 49
Start Check ………………………………………….268
Troubleshooting ………………………………………….271
F……………………………………………………………………………….437
Front Axle Spindles ………………………………………….221
Inspect and Replace Bushings ………………………………………….221
Remove and Install ………………………………………….219
Front Axle—316 and 318 ………………………………………….212
Inspect and Replace Pivot Bushings ………………………………………….212
Remove and Install ………………………………………….211
Front Axle—420 ………………………………………….216
Assemble Pivot Pin ………………………………………….216
Disassemble and Inspect Pivot Pin ………………………………………….214
Install ………………………………………….217
Remove ………………………………………….212
Front PTO Clutch ………………………………………….347
Clutch Adjustment, Check ………………………………………….347
Disassemble, Inspect and Assemble …………………………………………. 54
Install …………………………………………. 56
Remove …………………………………………. 53
Seat Switch Time Delay, Test ………………………………………….338
Seat Switch, Check ………………………………………….290
Fuel …………………………………………. 39
Gasoline …………………………………………. 39
Storage …………………………………………. 39
Fuel Filter Test …………280
Fuel Leak Check …………267
Fuel Transfer Pump Test …………280
G……………………………………………………………………………….438
Gasoline fuel ………… 39
Governor Linkage Adjustment …………279
Grease …………………………………………. 42
Extreme pressure and multipurpose …………………………………………. 42
H……………………………………………………………………………….438
Hour Meter ………………………………………….291
Check ………………………………………….291
Circuit Test ………………………………………….339
Hydraulic circuit symbols …………400
Hydraulic Control Valve ………………………………………….203
Assemble—Single-Spool ………………………………………….203
Assemble—Three-Spool ………………………………………….207
Assemble—Two-Spool ………………………………………….204
Disassemble & Inspect—Single-Spool ………………………………………….203
Disassemble & Inspect—Three-Spool ………………………………………….207
Disassemble & Inspect—Two-Spool ………………………………………….204
Leakage Test ………………………………………….430
Remove and Install—316 and 318 ………………………………………….200
Remove and Install—420 ………………………………………….202
Hydraulic oil ………… 41
Hydraulic Oil Warm-Up Procedure …………369
Hydraulic Oil Warm-Up Procedure …………392
Hydraulic Oil Warm-Up Procedure …………429
Hydraulic Schematics …………………………………………. 0
Early 318 …………………………………………. 0
Early 420 …………………………………………. 0
Later 318 …………………………………………. 0
Later 420 …………………………………………. 0
316 …………………………………………. 0
Hydraulic System ………………………………………….432
Bleed Procedure ………………………………………….432
Checkout ………………………………………….397
Control Valve Leakage Test ………………………………………….430
Rockshaft Cylinder Leakage Test ………………………………………….429
Troubleshooting ………………………………………….426
Hydraulics—Lift System Operation ………………………………………….424
Four-Position Spool ………………………………………….424
Three-Position Spool ………………………………………….423
Hydrostatic Lever ………………………………………….370
Friction Adjustment ………………………………………….370
Friction Check ………………………………………….353
I……………………………………………………………………………….438
Idle Mixture and Speed Adjustment …………277
Ignition ………………………………………….339
Seat Switch Time Delay, Test ………………………………………….339
Seat Switch, Check ………………………………………….291
Ignition Circuit ………………………………………….326
Tests ………………………………………….326
Ignition Circuit (Spark) ………………………………………….288
Check ………………………………………….288
Ignition Spark Test …………276
Implement Relief Valve ………………………………………….367
Adjustment ………………………………………….367
Check ………………………………………….367
Pressure Test ………………………………………….367
Remove and Install …………………………………………. 66
Inch torque values ………… 31
K……………………………………………………………………………….438
Key Switch ………………………………………….341
Test ………………………………………….341
L……………………………………………………………………………….438
Lamp Circuit, Dash ………………………………………….287
Check ………………………………………….287
Tests ………………………………………….316
Leakage Test ………………………………………….430
Hydraulic Control Valve ………………………………………….430
Rockshaft Cylinder ………………………………………….429
Lighting ………………………………………….291
Check ………………………………………….291
Test ………………………………………….340
Lubricant …………………………………………. 43
Alternative …………………………………………. 43
Mixing …………………………………………. 43
Storage …………………………………………. 43
Synthetic …………………………………………. 43
M……………………………………………………………………………….439
Machine Specifications ………… 23
Metric torque values ………… 30
Mixing lubricants ………… 43
Mower Blade Jack Sheaves ………………………………………….228
46 and 50-Inch Mower ………………………………………….228
Mower Blade Spindles ………………………………………….226
Early 60-Inch and 260 Rotary Mower ………………………………………….226
Later 60-Inch and 260 Rotary Mower ………………………………………….227
38 (Early), 46 and 50-Inch Mower ………………………………………….225
38-Inch Mower (Later) ………………………………………….225
Mower Deck Gear Case Oil ………… 42
Mower Gear Case—Early 60-Inch ………………………………………….242
Assemble ………………………………………….242
Disassemble and Inspect ………………………………………….238
Mower Gear Case—Later 60-Inch ………………………………………….251
Assemble ………………………………………….251
Disassemble and Inspect ………………………………………….247
Mower Gear Case—260 Rotary Mower ………………………………………….260
Assemble ………………………………………….260
Disassemble and Inspect ………………………………………….255
Mower Gear Case—50-Inch ………………………………………….234
Assemble ………………………………………….234
Disassemble and Inspect ………………………………………….229
N……………………………………………………………………………….439
Neutral Adjustment ………………………………………….373
Early Models ………………………………………….373
Later Models ………………………………………….374
Neutral Return Check …………354
Neutral Return Linkage ………………………………………….180
316 ………………………………………….180
318 ………………………………………….185
420 ………………………………………….191
Neutral Return Linkage Adjustment ………………………………………….370
Early Models ………………………………………….370
Later Models ………………………………………….374
O……………………………………………………………………………….439
O-ring boss fittings ………… 33
Oil …………………………………………. 40
Engine …………………………………………. 40
Hydraulic …………………………………………. 41
Mower Deck Gear Case …………………………………………. 42
Transmission …………………………………………. 41
Oil Pressure Regulating Valve Check …………283
P……………………………………………………………………………….439
Park Brake Lever, Inspect and Repair …………196
PTO Clutch and Lamp ………………………………………….289
Check ………………………………………….289
Tests ………………………………………….333
PTO Clutch, Front ………………………………………….347
Clutch Adjustment, Check ………………………………………….347
Disassemble, Inspect and Assemble …………………………………………. 54
Install …………………………………………. 56
Remove …………………………………………. 53
Seat Switch Time Delay, Test ………………………………………….338
Seat Switch, Check ………………………………………….290
PTO Neutral Start ………………………………………….290
Check ………………………………………….290
Safety Switch, Test ………………………………………….338
R……………………………………………………………………………….439
Rear Axle ………………………………………….120
Install ………………………………………….120
Remove ………………………………………….117
Regulator/Rectifier, Tests …………345
Repair specifications ………… 27
Rockshaft Cylinder Leakage Test …………429
S……………………………………………………………………………….439
Seat Switch ………………………………………….339
Ignition Time Delay, Test ………………………………………….339
Ignition, Check ………………………………………….291
PTO Time Delay, Test ………………………………………….338
PTO, Check ………………………………………….290
Serial Numbers …………………………………………. 46
Control Valve …………………………………………. 46
Differential …………………………………………. 46
Engine …………………………………………. 45
Product Identification …………………………………………. 45
Transmission …………………………………………. 45
Service Park Brake Check …………383
Short Circuit Test ………………………………………….349
2 or 3-Amp Fuses ………………………………………….349
20-Amp Fuse ………………………………………….348
Specifications …………………………………………. 23
Machine …………………………………………. 23
Repair …………………………………………. 27
Test and Adjustment …………………………………………. 37
Speed Reduction Check (318 and 420) …………354
Starter, Tests …………342
Starting Circuit ………………………………………….288
Check ………………………………………….288
Tests ………………………………………….322
Steering Column—318 and 420 ………………………………………….162
Assemble ………………………………………….162
Disassemble and Inspect ………………………………………….153
Remove and Install ………………………………………….152
Steering Cylinder (318 and 420) ………………………………………….172
Remove and Install ………………………………………….172
Steering Gearbox—316 ………………………………………….144
Assemble ………………………………………….144
Disassemble and Inspect ………………………………………….138
Remove and Install ………………………………………….134
Steering Shaft—316 ………………………………………….144
Assemble ………………………………………….144
Disassemble and Inspect ………………………………………….138
Remove and Install ………………………………………….134
Steering System ………………………………………….382
Check (318 and 420) ………………………………………….382
Leakage Test ………………………………………….393
Oil Leak Check (318 and 420) ………………………………………….381
Troubleshooting ………………………………………….389
Steering Valve/System Operation ………………………………………….386
Five-Port Valve ………………………………………….386
Four-Port Valve ………………………………………….385
Steering Valve—318 and 420 ………………………………………….162
Assemble ………………………………………….162
Disassemble and Inspect ………………………………………….153
Leakage Test ………………………………………….393
Neutral Check ………………………………………….369
Remove and Install ………………………………………….152
Storing lubricants ………… 43
Synthetic Lubricants ………… 43
T……………………………………………………………………………….440
Test and Adjustment Specifications ………… 37
Throttle Cable Adjustment …………276
Throttle Lever Adjustment …………283
Throttle Lever Check …………267
Timing Adjustment (B43E, B43G and B48G) …………281
Toe-In, Adjust …………222
Torque value …………………………………………. 33
O-Ring boss fitting …………………………………………. 33
Torque values …………………………………………. 31
Inch …………………………………………. 31
Metric …………………………………………. 30
Metric—Grade 7 …………………………………………. 32
Transmission …………………………………………. 82
Assemble Cover …………………………………………. 82
Assemble Pump and Motor …………………………………………. 81
Assemble Pump and Motor Housing …………………………………………. 79
Disassemble Cover …………………………………………. 71
Disassemble Pump and Motor …………………………………………. 74
Disassemble Pump and Motor Housing …………………………………………. 76
Drive Check ………………………………………….354
Install …………………………………………. 85
Neutral Check ………………………………………….353
Oil Leak Check ………………………………………….353
Remove …………………………………………. 66
Theory of Operation ………………………………………….358
Troubleshooting ………………………………………….361
Transmission Control Linkage …………………………………………. 95
Version Four …………………………………………. 95
Version One …………………………………………. 91
Version Three …………………………………………. 94
Version Two—316 and 318 …………………………………………. 92
Version Two—420 …………………………………………. 93
Transmission Neutral Start ………………………………………….290
Check ………………………………………….290
Safety Switch, Test ………………………………………….338
Transmission oil ………… 41
Turn Brake Check (318 and 420) …………383
Two-Speed Axle (420) ………………………………………….355
Lever Check ………………………………………….355
Lever Linkage Check ………………………………………….377
Two-Speed Control Linkage (420) ………… 96
W……………………………………………………………………………….440
Welch Plug Location Check …………368
Wheel Bearings, Inspect and Replace …………222

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