John Deere 1842Gv & 1842Hv Sabre Yard Tractor Technical Manual
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John Deere 1842Gv & 1842Hv Sabre Yard Tractor Technical Manual
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John Deere 1842Gv & 1842Hv Sabre Yard Tractor Technical Manual
There is a diode in-line in the magneto kill wire coming from each ignition module. This diode prevents feedback from one module to the other. Without these diodes, one magneto could fire the coil for the other magneto. If a diode fails in one of the magneto kill wires, that coil, could be fired by the other module, the result may be similar to that of an erratic running engine. A twin cylinder engine may run adequately on one cylinder as long as the power required for the application does not exceed the power produced by the one cylinder.
TABLE OF CONTENTS:
John Deere 1842Gv & 1842Hv Sabre Yard Tractor Technical Manual
TM1740 -1842GV & 1842HV SABRE YARD TRACTORS.............................................. 1 INTRODUCTION......................................................................... 3 SECTION 1- SAFETY.................................................................... 4 RECOGNIZE SAFETY INFORMATION..................................................... 4 REPLACE SAFETY SIGNS............................................................. 4 HANDLE FLUIDS SAFELY-AVOID FIRES................................................. 4 USE SAFE SERVICE PROCEDURES...................................................... 5 SERVICE TIRES SAFELY............................................................. 6 AVOID INJURY FROM ROTATING TINES................................................. 7 HANDLE CHEMICAL PRODUCTS SAFELY.................................................. 7 LIVE WITH SAFETY................................................................. 7 SECTION 2 - SPECIFICATIONS & INFORMATION............................................. 9 GENERAL VEHICLE SPECIFICATIONS................................................... 11 METRIC FASTENER TORQUE VALUES.................................................... 13 INCH FASTENER TORQUE VALUES...................................................... 14 GASOLINE— NORTH AMERICA.......................................................... 15 GASOLINE STORAGE— NORTH AMERICA.................................................. 15 GASOLINE STORAGE—EUROPE.......................................................... 16 GASOLINE—EUROPE.................................................................. 16 ENGINE OIL—NORTH AMERICA......................................................... 17 ENGINE OIL—EUROPE................................................................ 17 ENGINE BREAK–IN OIL— NORTH AMERICA............................................... 18 ENGINE BREAK–IN OIL— EUROPE...................................................... 19 ANTI-CORROSION GREASE............................................................ 20 ALTERNATIVE LUBRICANTS........................................................... 20 SYNTHETIC LUBRICANTS............................................................. 20 LUBRICANT STORAGE................................................................ 20 MIXING OF LUBRICANTS............................................................. 20 CHASSIS GREASE—NORTH AMERICA..................................................... 21 CHASSIS GREASE—EUROPE............................................................ 21 HYDROSTATIC TRANSMISSION OIL —NORTH AMERICA...................................... 22 HYDROSTATIC TRANSMISSION OIL—EUROPE.............................................. 22 GEAR TRANSMISSION GREASE- NORTH AMERICA.......................................... 23 GEAR TRANSMISSION GREASE - EUROPE................................................ 23 PRODUCT IDENTIFICATION LOCATIONS................................................. 24 PRODUCT IDENTIFICATION NUMBER (PIN).............................................. 24 ENGINE IDENTIFICATION NUMBER—BRIGGS & STRATTON................................... 24 HYDROSTATIC TRANSAXLE IDENTIFICATION NUMBER...................................... 24 GEAR TRANSAXLE IDENTIFICATION NUMBER............................................. 24 SECTION 3 - BRIGGS & STRATTON ENGINE................................................. 25 SPECIFICATIONS—BRIGGS & STRATTON................................................. 27 GENERAL SPECIFICATIONS....................................................... 27 REPAIR SPECIFICATIONS ....................................................... 27 TORQUE SPECIFICATIONS ....................................................... 28 TESTS & ADJUSTMENTS SPECIFICATIONS........................................... 28 TROUBLESHOOTING.................................................................. 29 TROUBLESHOOTING CHART....................................................... 29 ENGINE TROUBLESHOOTING GUIDE................................................. 31 Engine Cranks But Will Not Start......................................... 32 Engine Runs Erratically/Loss Of Power.................................... 33 TESTS & ADJUSTMENT............................................................... 34 THROTTLE CABLE ADJUSTMENT ................................................... 34 CHOKE CABLE ADJUSTMENT ...................................................... 34 FUEL SHUTOFF SOLENOID TEST .................................................. 34 GOVERNOR ADJUSTMENT ......................................................... 25 COMPRESSION TEST ............................................................ 35 WITHOUT CYLINDER LEAK TESTER............................................. 35 WITH CYLINDER LEAK TESTER................................................ 35 CARBURETOR ADJUSTMENT ....................................................... 36 VALVE CLEARANCE ADJUSTMENT .................................................. 39 CYLINDER BALANCE TEST ....................................................... 39 REPAIR........................................................................... 41 UPPER BLOWER HOUSING REMOVAL/INSTALLATION.................................... 41 AIR CLEANER REMOVAL AND INSTALLATION......................................... 41 CARBURETOR REMOVAL/INSTALLATION.............................................. 41 CARBURETOR DISASSEMBLY....................................................... 44 CARBURETOR INSPECTION........................................................ 46 CARBURETOR ASSEMBLY.......................................................... 46 ENGINE REMOVAL AND INSTALLATION.............................................. 49 CYLINDER AIR GUIDES REMOVAL/INSTALLATION..................................... 50 INTAKE MANIFOLD REMOVAL/INSTALLATION......................................... 51 CYLINDER HEAD REMOVAL/INSTALLATION........................................... 51 CYLINDER HEAD INSPECTION & REPAIR............................................ 53 VALVE REMOVAL................................................................ 54 VALVE INSPECTION & REPAIR.................................................... 54 VALVE GUIDE REAM............................................................. 55 VALVE INSTALLATION........................................................... 56 PISTON, RINGS & ROD REMOVAL/INSTALLATION..................................... 56 CONNECTING ROD INSPECTION.................................................... 58 CYLINDER BORE INSPECTION..................................................... 60 CYLINDER BORE HONING......................................................... 60 CYLINDER BORE CLEANING....................................................... 60 RESIZING CYLINDER BORE....................................................... 61 FLYWHEEL REMOVAL/INSTALLATION................................................ 61 CRANKSHAFT & CAM GEAR REMOVAL/INSTALLATION................................... 62 MAGNETO BEARING INSPECTION................................................... 65 PTO AND CAM BEARING INSPECTION............................................... 66 LUBRICATION.................................................................. 66 BREATHER VALVE SERVICE....................................................... 66 STARTING MOTOR REMOVAL AND INSTALLATION...................................... 68 STARTING MOTOR DISASSEMBLY................................................... 69 STARTING MOTOR ASSEMBLY...................................................... 71 STARTING MOTOR PINION GEAR REPLACEMENT....................................... 72 SECTION 4 - ELECTRICAL............................................................... 75 THEORY OF OPERATION INFORMATION.................................................. 77 DIAGNOSTIC INFORMATION........................................................... 77 WIRE COLOR ABBREVIATION CHART.................................................... 77 READING ELECTRICAL SCHEMATICS.................................................... 78 COMMON CIRCUIT TESTS............................................................. 79 CONDUCTORS FOR 12 VOLT CIRCUITS.................................................. 79 SPECIFICATIONS................................................................... 80 COMPONENT LOCATION............................................................... 81 ELECTRICAL SCHEMATIC AND WIRING HARNESS LEGEND................................... 82 ELECTRICAL SECTION WIRING HARNESS LEGEND......................................... 82 STANDARD ELECTRICAL SCHEMATIC.................................................... 83 WIRE HARNESSES................................................................... 86 W1 MAIN WIRING HARNESS....................................................... 86 W2 HEADLIGHT WIRING HARNESS.................................................. 89 W3 ENGINE ADAPTOR WIRING HARNESS............................................. 89 W4 ENGINE WIRING HARNESS..................................................... 89 W5 ENGINE WIRING HARNESS..................................................... 89 W6 ENGINE WIRING HARNESS..................................................... 90 W7 ENGINE WIRING HARNESS..................................................... 90 TROUBLESHOOTING.................................................................. 91 THEORY AND DIAGNOSIS............................................................. 92 POWER CIRCUIT................................................................ 92 POWER CIRCUIT OPERATION.................................................. 92 POWER CIRCUIT SCHEMATIC.................................................. 93 POWER CIRCUIT DIAGNOSIS.................................................. 94 CRANKING CIRCUIT............................................................. 96 CRANKING CIRCUIT OPERATION............................................... 96 CRANKING CIRCUIT ELECTRICAL SCHEMATIC.................................... 97 CRANKING CIRCUIT DIAGNOSIS............................................... 98 IGNITION CIRCUIT.............................................................100 IGNITION CIRCUIT OPERATION...............................................100 IGNITION CIRCUIT ELECTRICAL SCHEMATIC....................................101 IGNITION CIRCUIT DIAGNOSIS...............................................102 ENGINE SHUTOFF CIRCUIT.......................................................104 ENGINE SHUTOFF CIRCUIT OPERATION.........................................104 ENGINE SHUTOFF CIRCUIT SCHEMATIC.........................................105 ENGINE SHUTOFF CIRCUIT DIAGNOSIS.........................................106 CHARGING CIRCUIT.............................................................108 CHARGING CIRCUIT OPERATION...............................................108 CHARGING CIRCUIT ELECTRICAL SCHEMATIC....................................109 CHARGING CIRCUIT DIAGNOSIS)..............................................110 PTO CIRCUIT.................................................................. 96 PTO CIRCUIT OPERATION....................................................112 PTO CIRCUIT SCHEMATIC....................................................113 PTO CIRCUIT DIAGNOSIS....................................................114 HEADLIGHT CIRCUIT............................................................116 HEADLIGHT CIRCUIT OPERATION..............................................116 W2 HEADLIGHT WIRING HARNESS..............................................117 W2 HEADLIGHT ELECTRICAL SCHEMATIC........................................117 HEADLIGHT CIRCUIT DIAGNOSIS..............................................118 TESTS & ADJUSTMENTS..............................................................120 BATTERY TEST.................................................................120 CHARGE BATTERY...............................................................120 BATTERY LOAD TEST............................................................121 STARTING SOLENOID TEST.......................................................122 STARTING MOTOR...............................................................122 STARTING MOTOR LOADED AMPERAGE DRAW TEST.................................122 STARTING MOTOR NO-LOAD AMPERAGE & RPM TESTS..............................124 SPARK TEST...................................................................125 LIGHT SWITCH TEST............................................................125 KEY SWITCH TEST..............................................................126 PTO SWITCH TEST..............................................................126 BRAKE SWITCH TEST............................................................127 SEAT SWITCH TEST.............................................................127 DIODE TEST...................................................................128 FLYWHEEL MAGNET TEST.........................................................128 STATOR OUTPUT TEST...........................................................128 REGULATOR/RECTIFIER TEST.....................................................129 GROUND CIRCUIT TESTS.........................................................130 SECTION 5 - POWER TRAIN/GEAR.........................................................131 SPECIFICATIONS...................................................................133 ADJUSTMENT SPECIFICATIONS ...................................................133 REPAIR SPECIFICATIONS .......................................................133 TORQUE SPECIFICATIONS .......................................................133 OTHER MATERIALS .............................................................133 THEORY OF OPERATION .............................................................134 BELT DRIVE SYSTEM OPERATION 4................................................134 TRANSAXLE OPERATION..........................................................135 MANUAL SHIFT LINKAGE COMPONENT LOCATION .........................................137 CLUTCH PEDAL LINKAGE COMPONENT LOCATION .........................................138 TROUBLESHOOTING CHART ...........................................................139 DIAGNOSIS .......................................................................140 MACHINE WILL NOT MOVE IN FORWARD OR REVERSE .................................140 MACHINE WILL NOT MOVE IN FORWARD OR REVERSE .................................142 MACHINE MOVES IN ONE DIRECTION ONLY, OR DOESN’T MOVE IN ONE OR MORE GEARS....144 LOSES POWER UNDER LOAD, BELT SLIPS, ERRATIC DRIVE............................146 LOSES POWER UNDER LOAD, BELT SLIPS, ERRATIC DRIVE............................148 JERKY AND AGGRESSIVE ENGAGEMENT..............................................150 SHIFTS HARD..................................................................152 NOISY OPERATION..............................................................154 ADJUSTMENTS .....................................................................158 GEARSHIFT LEVER NEUTRAL ADJUSTMENT ..........................................158 TRACTION DRIVE BELT TENSION ADJUSTMENT.......................................158 REPAIR...........................................................................159 TRANSAXLE REMOVAL AND INSTALLATION ..........................................159 TRANSAXLE DISASSEMBLY AND INSPECTION.........................................160 TRANSAXLE ASSEMBLY ..........................................................165 DIFFERENTIAL REMOVAL, DISASSEMBLY AND INSTALLATION ..........................169 TRACTION DRIVE CLUTCH ASSEMBLY REMOVAL AND INSTALLATION .....................171 TRACTION DRIVE BELT REMOVAL AND INSTALLATION.................................172 SECTION 6 - POWER TRAIN—HYDROSTATIC..................................................173 SPECIFICATIONS...................................................................175 ADJUSTMENT SPECIFICATIONS....................................................175 REPAIR SPECIFICATIONS........................................................175 TORQUE SPECIFICATIONS........................................................175 OTHER MATERIALS..............................................................175 COMPONENT LOCATION...............................................................176 K61 TRANSAXLE COMPONENTS.....................................................176 THEORY OF OPERATION..............................................................178 DRIVE SYSTEM OPERATION.......................................................178 HYDROSTATIC SYSTEM OPERATION.................................................180 TRANSAXLE OPERATION—GEAR POWER FLOW..........................................182 TRANSAXLE OPERATION—HYDROSTATIC AND BRAKE CONTROL LINKAGE....................183 TROUBLESHOOTING..................................................................184 POWER TRAIN TROUBLESHOOTING CHART............................................184 DIAGNOSIS........................................................................186 MACHINE WILL NOT MOVE FORWARD OR REVERSE.....................................186 MACHINE WILL NOT MOVE FORWARD OR REVERSE, continued..........................188 NOISY OPERATION..............................................................190 MACHINE CREEPS...............................................................192 MACHINE MOVES IN ONE DIRECTION ONLY..........................................194 ERRATIC SPEED................................................................196 MACHINE IS TOO AGGRESSIVE IN FORWARD OR REVERSE..............................199 MACHINE DOES NOT ACHIEVE FULL GROUND SPEED...................................200 MACHINE DOES NOT ACHIEVE FULL GROUND SPEED, continued........................202 PARK BRAKE DOES NOT HOLD MACHINE ON HILL.....................................204 BRAKE SWITCH WILL NOT ENGAGE.................................................206 FREEWHEEL VALVE WILL NOT WORK................................................208 FREEWHEEL VALVE WILL NOT STAY OPEN WITH ENGINE OFF...........................209 ADJUSTMENTS......................................................................210 HYDROSTATIC TRANSAXLE BLEEDING PROCEDURE.....................................210 NEUTRAL CREEP ADJUSTMENT.....................................................210 PEDAL HEIGHT ADJUSTMENT......................................................211 TRACTION DRIVE BELT TENSION ADJUSTMENT.......................................212 REPAIR...........................................................................213 TRANSAXLE REMOVAL AND INSTALLATION...........................................213 TRANSAXLE DISASSEMBLY/ INSPECTION............................................215 CONTROL PEDALS AND LINKAGE...................................................230 TRACTION DRIVE BELT REMOVAL AND INSTALLATION.................................231 TRACTION DRIVE BELT TENSIONER ASSEMBLY.......................................232 SECTION 7 - STEERING.................................................................233 SPECIFICATIONS...................................................................235 THEORY OF OPERATION..............................................................236 STEERING SYSTEM..............................................................236 TROUBLESHOOTING..................................................................237 STEERING SYSTEM TROUBLESHOOTING CHART........................................237 STEERING SYSTEM DIAGNOSIS....................................................238 REPAIR...........................................................................239 STEERING WHEEL REMOVAL AND INSTALLATION......................................239 STEERING SHAFT...............................................................239 STEERING SECTOR REMOVAL & INSTALLATION.......................................241 LEFT TURN STOP MODIFICATION..................................................242 SECTION 8 - BRAKES...................................................................243 SPECIFICATIONS...................................................................245 ADJUSTMENT SPECIFICATIONS....................................................245 REPAIR SPECIFICATIONS........................................................245 OTHER MATERIALS..............................................................245 COMPONENT LOCATION AND OPERATION.................................................246 BRAKE SYSTEM OPERATION—GEAR TRANSAXLE........................................246 BRAKE SYSTEM OPERATION— HYDROSTATIC TRANSAXLE................................247 HYDROSTATIC INTERNAL BRAKE LINKAGE OPERATION.................................248 TROUBLESHOOTING..................................................................249 DIAGNOSIS........................................................................250 BRAKES DO NOT ENGAGE WHEN PEDAL DEPRESSED....................................250 PARK BRAKE DOES NOT HOLD MACHINE ON HILL.....................................250 NOISY OPERATION..............................................................251 MACHINE WILL NOT MOVE, OR IS SLOW IN FORWARD.................................251 MACHINE WILL NOT MOVE, OR IS SLOW REVERSE....................................252 BRAKE SWITCH DOES NOT ENGAGE WHEN BRAKE PEDAL IS DEPRESSED...................252 SPECIFICATIONS 3.............................................................259 ADJUSTMENT SPECIFICATIONS 3..................................................259 REPAIR SPECIFICATIONS 3......................................................259 SPECIAL OR ESSENTIAL TOOLS 3.................................................259 SERVICE PARTS KITS 3.........................................................259 COMPONENT LOCATION 4.........................................................259 MOWER DECK COMPONENTS 42-INCH 4..............................................259 TROUBLESHOOTING 7............................................................259 MOWER DECK TROUBLESHOOTING CHART 7...........................................259 DIAGNOSIS 8..................................................................259 MOWER DRIVE CHECKS 8.........................................................259 ADJUSTMENTS 13...............................................................259 MOWER LEVEL SIDE-TO-SIDE 13..................................................259 MOWER LEVEL FRONT-TO-REAR 14.................................................259 MOWER GAGE WHEELS ADJUST 15..................................................259 REPAIR 15....................................................................259 MOWER BLADES REMOVAL/INSTALLATION 15.........................................259 SHARPEN MOWER BLADES 15......................................................259 BALANCING MOWER BLADES 16....................................................259 MOWER DECK REMOVAL/INSTALLATION 16...........................................259 IDLERS AND SHEAVES 42-INCH...................................................264 ADJUSTMENTS......................................................................253 DRAG LINK ADJUSTMENT.........................................................239 BRAKE ADJUSTMENT— HYDROSTATIC................................................253 BRAKE ADJUSTMENT—GEAR........................................................253 REPAIR...........................................................................254 BRAKE LINKAGE....................................................................254 BRAKE PEDAL ASSEMBLY.............................................................254 BRAKE REMOVAL AND INSTALLATION—HYDROSTATIC.......................................255 BRAKE REMOVAL AND INSTALLATION—GEAR..............................................256 PARK BRAKE LEVER AND LINKAGE.....................................................257 SECTION 9 - ATTACHMENTS..............................................................259 ADJUSTMENT SPECIFICATIONS........................................................261 REPAIR SPECIFICATIONS........................................................261 SPECIAL OR ESSENTIAL TOOLS...................................................261 SERVICE PARTS KITS...........................................................261 COMPONENT LOCATION...............................................................262 MOWER DECK COMPONENTS—42-INCH................................................262 DRAFT ARMS COMPONENT LOCATION................................................263 IDLERS AND SHEAVES 42-INCH...................................................264 TROUBLESHOOTING..............................................................265 MOWER DECK TROUBLESHOOTING CHART.........................................265 DIAGNOSIS........................................................................266 MOWER DRIVE CHECKS...........................................................266 MOWER DECK WILL NOT RUN......................................................268 MOWER DECK VIBRATES..........................................................269 CUTS UNEVENLY................................................................270 ADJUSTMENTS......................................................................271 MOWER LEVEL SIDE-TO-SIDE.....................................................271 MOWER LEVEL FRONT-TO-REAR....................................................272 MOWER GAGE WHEELS ADJUST.....................................................273 REPAIR...........................................................................273 MOWER BLADES REMOVAL/INSTALLATION............................................273 SHARPEN MOWER BLADES.........................................................273 BALANCING MOWER BLADES.......................................................274 MOWER DECK REMOVAL/INSTALLATION..............................................274 SPINDLES 42-INCH REMOVAL/INSTALLATION........................................276 SECTION 10 - MISCELLANEOUS...........................................................277 SPECIFICATIONS...................................................................279 OTHER MATERIALS..............................................................279 COMPONENT LOCATION...............................................................280 FRONT AXLE AND TIRES COMPONENT LOCATION......................................280 LIFT ASSIST AND DEPTH STOP THEORY OF OPERATION...............................281 REPAIR...........................................................................282 FRONT WHEEL REMOVAL AND INSTALLATION.........................................284 FRONT WHEEL BUSHING REMOVAL..................................................284 FRONT AXLE REMOVAL AND INSTALLATION..........................................282 HOOD REMOVAL AND INSTALLATION................................................285 SEAT AND SUPPORT REMOVAL AND INSTALLATION....................................285 FENDER DECK REMOVAL AND INSTALLATION.........................................286 MOWER DECK LIFT LINKAGE......................................................286 HEIGHT ADJUSTER..............................................................287 INDEX................................................................................289
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