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Kubota Tractor B2050,B2350,B2650,B3150 Workshop Manual – PDF DOWNLOAD
Kubota Tractor B2050,B2350,B2650,B3150 Workshop Manual – PDF DOWNLOAD
FILE DETAILS:
Kubota Tractor B2050,B2350,B2650,B3150 Workshop Manual – PDF DOWNLOAD
Language : English
Pages : 539
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
DESCRIPTION:
Kubota Tractor B2050,B2350,B2650,B3150 Workshop Manual – PDF DOWNLOAD
TO THE READER:
This Workshop Manual tells the servicing personnel about the mechanism, servicing and
maintenance of the B2050, B2350, B2650 and B3150. It contains 4 parts: “Information”, “General”,
“Mechanism” and “Servicing”.
Information
This section primarily contains information below.
• Safety First
• Safety Decal
• Specifications
• Dimensions
General
This section primarily contains information below.
• Engine Identification
• Model Identification
• General Precautions
• Maintenance Check List
• Check and Maintenance
• Special Tools
Mechanism
This section contains information on the structure and the function of the unit. Before you continue
with the subsequent sections, make sure that you read this section.
Refer to the latest version of Workshop Manual (Code No. 9Y021-01870 / 9Y021-18200) for the
diesel engine / tractor mechanism that this workshop manual does not include.
Servicing
This section primarily contains information below.
• Troubleshooting
• Servicing Specifications
• Tightening Torques
• Checking, Disassembling and Servicing
- All illustrations, photographs and specifications contained in this manual are of the newest
information available at the time of publication. - KUBOTA reserves the right to change all information at any time without notice.
- Since this manual includes many models, information or illustrations and photographs can show
more than one model.
TABLE OF CONTENTS:
Kubota Tractor B2050,B2350,B2650,B3150 Workshop Manual – PDF DOWNLOAD
B2050,B2350,B2650,B3150.............................................................................................. 1 TO THE READER.................................................................................................... 2 I INFORMATION.................................................................................................... 3 INFORMATION.................................................................................................. 4 1. SAFETY FIRST.......................................................................................... 5 2. SAFETY DECALS......................................................................................... 8 3. SPECIFICATIONS........................................................................................ 11 4. TRAVELING SPEEDS...................................................................................... 15 5. DIMENSIONS............................................................................................ 17 G GENERAL........................................................................................................ 20 GENERAL...................................................................................................... 21 1. TRACTOR IDENTIFICATION................................................................................ 22 2. GENERAL PRECAUTIONS................................................................................... 23 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING.................................................. 24 [1] WIRING........................................................................................... 24 [2] BATTERY.......................................................................................... 26 [3] FUSE............................................................................................. 26 [4] CONNECTOR........................................................................................ 26 [5] HANDLING OF CIRCUIT TESTER....................................................................... 27 [6] COLOR OF WIRING.................................................................................. 28 4. LUBRICANTS, FUEL AND COOLANT.......................................................................... 29 5. TIGHTENING TORQUES.................................................................................... 31 [1] GENERAL USE SCREWS, BOLTS AND NUTS............................................................... 31 [2] STUD BOLTS....................................................................................... 31 [3] METRIC SCREWS, BOLTS AND NUTS.................................................................... 32 [4] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF THREADS................................. 32 [5] PLUGS............................................................................................ 32 6. MAINTENANCE CHECK LIST................................................................................ 33 7. CHECK AND MAINTENANCE................................................................................. 35 [1] DAILY CHECK...................................................................................... 35 [2] CHECK POINTS OF EVERY 50 HOURS................................................................... 39 [3] CHECK POINTS OF EVERY 100 HOURS.................................................................. 43 [4] CHECK POINTS OF EVERY 200 HOURS.................................................................. 50 [5] CHECK POINTS OF EVERY 400 HOURS.................................................................. 55 [6] CHECK POINT OF EVERY 800 HOURS................................................................... 57 [7] CHECK POINT OF EVERY 1500 HOURS.................................................................. 57 [8] CHECK POINT OF EVERY 3000 HOURS.................................................................. 57 [9] CHECK POINTS OF EVERY 1 YEAR..................................................................... 57 [10] CHECK POINTS OF EVERY 2 YEARS................................................................... 58 [11] OTHERS.......................................................................................... 60 8. SPECIAL TOOLS......................................................................................... 64 [1] SPECIAL TOOLS FOR ENGINE......................................................................... 64 [2] SPECIAL TOOLS FOR TRACTOR........................................................................ 71 [3] SPECIAL TOOLS FOR CABIN.......................................................................... 74 9. TIRES................................................................................................. 77 [1] TIRE PRESSURE.................................................................................... 77 [2] WHEEL ADJUSTMENT................................................................................. 78 (1) Front Wheels................................................................................. 78 (2) Rear Wheels.................................................................................. 79 [3] BALLAST.......................................................................................... 80 10. IMPLEMENT LIMITATIONS................................................................................ 82 1 ENGINE......................................................................................................... 84 MECHANISM.................................................................................................... 85 1. ENGINE BODY........................................................................................... 86 [1] CLOSED BREATHER [D1105, V1505]................................................................... 86 [2] HALF-FLOATING HEAD COVER [D1305]................................................................. 86 [3] GOVERNOR......................................................................................... 87 SERVICING.................................................................................................... 89 1. TROUBLESHOOTING....................................................................................... 90 2. SERVICING SPECIFICATIONS.............................................................................. 96 3. TIGHTENING TORQUES....................................................................................102 [1] TRACTOR SECTION..................................................................................102 [2] ENGINE SECTION...................................................................................102 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................103 [1] CHECKING AND ADJUSTING...........................................................................103 (1) Engine Body..................................................................................103 (2) Lubricating System...........................................................................105 (3) Cooling System...............................................................................106 (4) Fuel System..................................................................................108 [2] PREPARATION......................................................................................111 (1) Draining Lubricants and Coolant..............................................................111 (2) Separating Engine from Clutch Housing (CABIN)................................................113 (3) Separating Engine from Front Axle Frame (CABIN)..............................................116 (4) Separating Engine from Clutch Housing (ROPS).................................................116 (5) Separating Engine from Front Axle Frame (ROPS)...............................................119 [3] DISASSEMBLING AND ASSEMBLING.....................................................................120 (1) External Components..........................................................................120 (2) Cylinder Head and Valve and Oil Pan..........................................................121 (3) Gear Case....................................................................................123 (4) Piston and Connecting Rod....................................................................127 (5) Crankshaft...................................................................................130 [4] SERVICING........................................................................................132 (1) Cylinder Head and Valves.....................................................................132 (2) Idle Gear and Camshaft.......................................................................138 (3) Piston and Connecting Rod....................................................................140 (4) Crankshaft...................................................................................144 (5) Cylinder.....................................................................................149 (6) Oil Pump.....................................................................................150 2 CLUTCH.........................................................................................................151 MECHANISM....................................................................................................152 1. STRUCTURE.............................................................................................153 [1] MANUAL TRANSMISSION MODEL........................................................................153 [2] CLUTCH OPERATION.................................................................................154 (1) Clutch "Engaged".............................................................................154 (2) Clutch "Disengaged"..........................................................................154 SERVICING....................................................................................................155 1. TROUBLESHOOTING.......................................................................................156 2. SERVICING SPECIFICATIONS..............................................................................157 3. TIGHTENING TORQUES....................................................................................158 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................159 [1] CHECKING AND ADJUSTING...........................................................................159 [2] DISASSEMBLING AND ASSEMBLING.....................................................................160 (1) Separating Engine From Clutch housing........................................................160 (2) Separating Clutch Assembly...................................................................163 [3] SERVICING........................................................................................164 3 TRANSMISSION...................................................................................................165 MECHANISM....................................................................................................166 1. STRUCTURE.............................................................................................168 [1] MANUAL TRANSMISSION (WITHOUT BI-SPEED TURN AND MID-PTO MODEL)....................................168 [2] MANUAL TRANSMISSION (WITHOUT BI-SPEED TURN AND WITH MID-PTO MODEL)...............................169 [3] MANUAL TRANSMISSION (WITH BI-SPEED TURN AND WITHOUT MID-PTO MODEL)...............................170 [4] MANUAL TRANSMISSION (WITH BI-SPEED TURN AND MID-PTO MODEL).......................................171 [5] HST (WITH BI-SPEED TURN AND MID-PTO MODEL).......................................................172 2. FRONT CASE............................................................................................173 [1] STRUCTURE (HST WITH BI-SPEED TURN MODEL).........................................................173 [2] BI-SPEED TURN LINKAGE............................................................................174 (1) Linkage......................................................................................174 (2) Linkage: Bi-Speed Turn "Engaged".............................................................174 (3) Linkage: Bi-Speed Turn "Disengaged"..........................................................175 [3] BI-SPEED TURN POWERTRAIN.........................................................................176 (1) HYDRAULIC CIRCUIT............................................................................176 (2) Bi-Speed Turn "Engaged"......................................................................177 (3) Bi-Speed Turn "Disengaged"...................................................................177 3. MANUAL TRANSMISSION...................................................................................178 [1] STRUCTURE........................................................................................178 (1) Main Gear Shift Section......................................................................178 (2) Shuttle Gear Shift Section...................................................................179 4. HYDROSTATIC TRANSMISSION..............................................................................180 [1] STRUCTURE........................................................................................180 [2] PUMP AND MOTOR...................................................................................182 [3] OIL FLOW AND VALVES..............................................................................183 [4] CONTROL LINKAGE..................................................................................190 (1) ROPS Model...................................................................................190 (2) CABIN Model..................................................................................190 5. CRUISE CONTROL........................................................................................191 [1] CRUISE CONTROL LINKAGE [CABIN MODEL].............................................................191 (1) Cruise Control...............................................................................191 (2) Cruise Control Release.......................................................................192 [2] CRUISE CONTROL LINKAGE (ROPS MODEL)..............................................................193 (1) Cruise Control...............................................................................193 (2) Cruise Control Release.......................................................................194 6. RANGE GEAR SHIFT SECTION..............................................................................195 7. FRONT WHEEL DRIVE SECTION.............................................................................196 8. PTO SYSTEM (HYDRAULIC PTO CLUTCH MODEL)...............................................................197 [1] STRUCTURE........................................................................................197 [2] REAR PTO SECTION.................................................................................198 [3] REAR PTO / MID-PTO SECTION.......................................................................199 [4] MID-PTO SECTION..................................................................................200 [5] INDEPENDENT PTO..................................................................................201 (1) Hydraulic Circuit............................................................................201 (2) Independent PTO Control Valve................................................................202 (3) Independent PTO Clutch.......................................................................203 (4) Independent PTO Lever "Engaged"..............................................................204 (5) Independent PTO Lever "Disengaged"...........................................................205 9. PTO SYSTEM (MECHANICAL PTO CLUTCH MODEL)..............................................................206 [1] STRUCTURE........................................................................................206 [2] REAR PTO SECTION.................................................................................207 [3] REAR PTO / MID-PTO SECTION.......................................................................208 [4] MID-PTO SECTION..................................................................................208 [5] ONE-WAY CLUTCH SYSTEM............................................................................209 10. DIFFERENTIAL GEAR SYSTEM.............................................................................210 [1] DIFFERENTIAL FUNCTION............................................................................210 [2] DIFFERENTIAL LOCK................................................................................211 SERVICING....................................................................................................212 1. TROUBLESHOOTING.......................................................................................213 2. SERVICING SPECIFICATIONS..............................................................................218 3. TIGHTENING TORQUES....................................................................................220 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................221 [1] CHECKING AND ADJUSTING...........................................................................221 (1) Bi-Speed Turn................................................................................221 (2) HST..........................................................................................222 (3) Independent PTO Control Valve................................................................226 [2] PREPARATION......................................................................................227 (1) Draining Lubricants and Coolant..............................................................227 (2) Separating Transmission from Tractor Body (CABIN)............................................229 (3) Separating Engine and Clutch Housing (CABIN).................................................233 (4) Separating Transmission from Tractor Body (ROPS).............................................233 (5) Separating Engine and Clutch Housing (ROPS)..................................................235 [3] DISASSEMBLING AND ASSEMBLING.....................................................................236 (1) Front Case...................................................................................236 (2) Main Gear Shift Section......................................................................241 (3) Mechanical PTO Clutch Assembly...............................................................243 (4) Hydrostatic Transmission (HST)...............................................................246 (5) PTO Clutch Case (HST Model)..................................................................256 (6) Bevel Pinion Shaft...........................................................................257 (7) Range Gear Shaft.............................................................................258 (8) Front Wheel Drive Shaft......................................................................259 (9) Independent PTO Clutch Shifter...............................................................260 (10) Independent PTO Clutch......................................................................262 (11) Mid-PTO Section.............................................................................266 (12) Differential Gear Section...................................................................268 [4] SERVICING........................................................................................269 (1) Bi-Speed Turn Clutch.........................................................................269 (2) Mechanical PTO Clutch........................................................................269 (3) HST..........................................................................................270 (4) Independent PTO Clutch.......................................................................273 (5) Transmission Case............................................................................274 (6) Differential Gear............................................................................275 4 REAR AXLE......................................................................................................278 MECHANISM....................................................................................................279 1. STRUCTURE.............................................................................................280 SERVICING....................................................................................................281 1. TROUBLESHOOTING.......................................................................................282 2. TIGHTENING TORQUES....................................................................................283 3. DIASSEMBLING AND SERVICING............................................................................284 [1] DIASSEMBLING AND ASSEMBLING......................................................................284 (1) Separating Rear Axle Case....................................................................284 [2] SERVICING........................................................................................287 5 BRAKES.........................................................................................................288 MECHANISM....................................................................................................289 1. LINKAGE...............................................................................................290 [1] ROPS.............................................................................................290 (1) HST Type.....................................................................................290 (2) Manual Type..................................................................................290 [2] CABIN (HST TYPE).................................................................................291 2. OPERATION.............................................................................................292 SERVICING....................................................................................................293 1. TROUBLESHOOTING.......................................................................................294 2. SERVICING SPECIFICATIONS..............................................................................295 3. TIGHTENING TORQUES....................................................................................296 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................297 [1] CHECKING AND ADJUSTING...........................................................................297 [2] DISASSEMBLING AND ASSEMBLING.....................................................................298 (1) Brake Pedal (Cabin HST Model)................................................................298 (2) Brake Pedal (ROPS Manual Transmission Model).................................................300 (3) Brake Pedal (ROPS HST Model).................................................................300 (4) Parking Brake Lever..........................................................................301 (5) Separating Rear Axle Case....................................................................301 [3] SERVICING........................................................................................305 6 FRONT AXLE.....................................................................................................306 MECHANISM....................................................................................................307 1. STRUCTURE.............................................................................................308 [1] 4 WHEEL DRIVE MODEL..............................................................................308 SERVICING....................................................................................................309 1. TROUBLESHOOTING.......................................................................................310 2. SERVICING SPECIFICATIONS..............................................................................311 3. TIGHTENING TORQUES....................................................................................312 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................313 [1] CHECKING AND ADJUSTING...........................................................................313 [2] DISASSEMBLING AND ASSEMBLING.....................................................................314 (1) Separating Front Axle Assembly...............................................................314 (2) Disassembling Front Axle Assembly............................................................315 [3] SERVICING........................................................................................321 7 STEERING.......................................................................................................325 MECHANISM....................................................................................................326 1. HYDRAULIC CIRCUIT.....................................................................................327 2. STEERING CONTROLLER...................................................................................328 3. STEERING CYLINDER.....................................................................................329 4. HYDRAULIC PUMP........................................................................................330 SERVICING....................................................................................................331 1. TROUBLESHOOTING.......................................................................................332 2. SERVICING SPECIFICATIONS..............................................................................334 3. TIGHTENING TORQUES....................................................................................335 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................336 [1] CHECKING.........................................................................................336 (1) Relief Valve.................................................................................336 (2) Hydraulic Pump for Power Steering............................................................336 [2] DISASSEMBLING....................................................................................336 (1) Separating Power Steering Controller (CABIN Type)............................................336 (2) Separating Power Steering Controller (ROPS Type).............................................338 (3) Power Steering Controller (ROPS Type)........................................................338 (4) Power Steering Cylinder......................................................................339 [3] SERVICING........................................................................................341 (1) Power Steering Cylinder......................................................................341 8 HYDRAULIC SYSTEM...............................................................................................342 MECHANISM....................................................................................................343 1. HYDRAULIC CIRCUIT.....................................................................................344 [1] MANUAL TRANSMISSION MODEL (WITHOUT BI-SPEED TURN)................................................344 [2] MANUAL TRANSMISSION MODEL (WITH BI-SPEED TURN)...................................................345 [3] HST MODEL........................................................................................346 2. HYDRAULIC PUMP........................................................................................347 3. THREE POINTS HYDRAULIC SYSTEM.........................................................................348 [1] HYDRAULIC CIRCUIT................................................................................348 (1) Manual Transmission Model (Without Front Loader Valve).......................................348 (2) HST Model (With Front Loader Control Valve)..................................................348 [2] RELIEF VALVE.....................................................................................349 (1) Manual Transmission Model (Without Front Loader Valve).......................................349 (2) HST Model (With Front Loader Control Valve)..................................................350 [3] POSITION CONTROL VALVE...........................................................................351 (1) Structure....................................................................................351 (2) Operation....................................................................................352 [4] FEEDBACK LINKAGE FOR POSITION CONTROL............................................................354 4. FRONT LOADER CONTROL VALVE (IF EQUIPPED)..............................................................355 [1] STRUCTURE........................................................................................355 [2] OPERATION........................................................................................356 5. REMOTE CONTROL VALVE (IF EQUIPPED)....................................................................363 6. HYDRAULIC OUTLET......................................................................................364 [1] MANUAL TRANSMISSION MODEL........................................................................364 (1) Front Hydraulic Outlet.......................................................................364 (2) Rear Hydraulic Outlet........................................................................365 [2] HST MODEL........................................................................................366 (1) Rear Hydraulic Outlet........................................................................366 SERVICING....................................................................................................367 1. TROUBLESHOOTING.......................................................................................368 2. SERVICING SPECIFICATIONS..............................................................................370 3. TIGHTENING TORQUES....................................................................................372 4. CHECKING, DISASSEMBLING AND SERVICING.................................................................373 [1] CHECKING AND ADJUSTING...........................................................................373 (1) Hydraulic Pump (For 3-Point Hitch Hydraulic System)..........................................373 (2) Hydraulic Pump (For Power Steering, Bi-speed Turn, PTO Clutch and HST).......................375 (3) 3-Points Hitch Relief Valve..................................................................377 (4) Lift Arm.....................................................................................378 [2] DISASSEMBLING AND ASSEMBLING.....................................................................378 (1) Hydraulic Pump...............................................................................378 (2) 3-Point Hitch................................................................................380 (3) Separating Hydraulic Cylinder From Tractor Body (ROPS Model).................................380 (4) Separating Hydraulic Cylinder From Tractor Body (CABIN Model)................................381 (5) 3-Points Hitch: Hydraulic Cylinder...........................................................382 (6) Front Loader Control Valve Assembly (If Equipped)............................................386 (7) Remote Control Valve (If Equipped)...........................................................389 [3] SERVICING........................................................................................389 9 ELECTRICAL SYSTEM..............................................................................................391 MECHANISM....................................................................................................392 1. WIRING DIAGRAM........................................................................................393 [1] ROPS MODEL (EXCEPT FOR B3150)....................................................................393 [2] B3150 ROPS.......................................................................................394 [3] CABIN MODEL......................................................................................395 2. ENGINE STARTING SYSTEM AND STOPPING SYSTEM............................................................396 [1] OPC SYSTEM CIRCUIT...............................................................................396 [2] CONTROLLER.......................................................................................397 [3] SAFETY SWITCH....................................................................................402 (1) PTO Select Lever Switch (Only Model With Mid PTO)............................................403 (2) PTO Clutch Lever Switch......................................................................404 (3) HST Pedal Switch (HST Model).................................................................404 (4) Shuttle Shift Lever Switch (Manual Transmission Model).......................................405 (5) Seat Switch..................................................................................405 (6) Parking Brake Switch.........................................................................405 [4] STARTER..........................................................................................406 [5] KEY STOP SOLENOID................................................................................406 [6] GLOW PLUG........................................................................................407 3. CHARGING SYSTEM.......................................................................................408 [1] ALTERNATOR.......................................................................................409 [2] IC REGULATOR.....................................................................................410 4. LIGHTING SYSTEM.......................................................................................411 [1] HEAD LIGHT.......................................................................................411 [2] TURN SIGNAL LIGHT................................................................................413 [3] HAZARD LIGHT.....................................................................................415 [4] BEACON...........................................................................................417 [5] BRAKE LIGHT......................................................................................419 [6] WORK LIGHT (CABIN MODEL ONLY)....................................................................420 [7] TRAILER SOCKET...................................................................................421 5. INSTRUMENT PANEL......................................................................................422 [1] EASY CHECKER™....................................................................................422 [2] GAUGES AND OTHER INDICATORS......................................................................423 [3] ERROR CODE DISPLAY (CABIN MODEL ONLY)............................................................425 [4] SWITCHES AND SENSORS.............................................................................425 SERVICING....................................................................................................428 1. TROUBLESHOOTING.......................................................................................429 2. SERVICING SPECIFICATIONS..............................................................................435 3. TIGHTENING TORQUES....................................................................................436 4. CHECKING AND ADJUSTING................................................................................437 [1] BATTERY..........................................................................................437 [2] FUSE.............................................................................................438 [3] RELAYS...........................................................................................439 (1) Relays (ROPS Model)..........................................................................439 (2) Relays (CABIN Model).........................................................................441 [4] STARTING SYSTEM..................................................................................443 (1) Key Switch...................................................................................443 (2) Safety Switches..............................................................................445 (3) OPC Controller...............................................................................446 (4) Key Stop Solenoid............................................................................446 (5) Starter......................................................................................447 (6) Glow Plug....................................................................................448 [5] CHARGING SYSTEM..................................................................................449 (1) Alternator...................................................................................449 [6] LIGHTING SYSTEM..................................................................................450 (1) Combination Switch (ROPS Model)..............................................................450 (2) Combination Switch (CABIN Model).............................................................452 (3) Hazard Switch (Cabin Model Only).............................................................454 (4) Beacon Switch................................................................................455 (5) Flasher Unit.................................................................................456 (6) Brake Lamp Switch............................................................................457 (7) Work Light Switch (CABIN Model Only).........................................................458 (8) Dome Light (CABIN Model Only)................................................................459 [7] WARNING LAMP, INDICATOR LAMP AND GAUGE...........................................................460 (1) Instrument Panel (ROPS Model)................................................................460 (2) Instrument Panel (CABIN Model)...............................................................461 (3) Engine Oil Pressure Switch...................................................................462 (4) Coolant Temperature Sensor (ROPS Model)......................................................463 (5) Coolant Temperature Sensor (CABIN Model).....................................................464 (6) Fuel Sensor..................................................................................465 (7) Bi-speed Turn Switch.........................................................................465 (8) Engine Rotation Sensor (CABIN Model Only)....................................................466 (9) Display Switch...............................................................................467 5. DISASSEMBLING AND ASSEMBLING..........................................................................468 [1] STARTER..........................................................................................468 [2] ALTERNATOR.......................................................................................468 6. SERVICING.............................................................................................471 [1] STARTER..........................................................................................471 [2] ALTERNATOR.......................................................................................472 10 CABIN.........................................................................................................474 MECHANISM....................................................................................................475 1. OUTLINE OF AIR CONDITIONING SYSTEM....................................................................476 [1] STRUCTURE........................................................................................476 [2] AIR CONDITIONING SYSTEM..........................................................................478 2. REFRIGERATION SYSTEM..................................................................................479 [1] COMPRESSOR.......................................................................................479 (1) Pressure Relief Valve........................................................................480 (2) Magnetic Clutch..............................................................................480 [2] CONDENSER........................................................................................481 [3] RECEIVER.........................................................................................482 [4] AIR CONDITIONER UNIT.............................................................................483 (1) Evaporator...................................................................................484 (2) Heater Core..................................................................................485 3. SYSTEM CONTROL........................................................................................486 4. ELECTRICAL SYSTEM.....................................................................................487 [1] ELECTRICAL CIRCUIT...............................................................................487 [2] RELAY............................................................................................488 SERVICING....................................................................................................490 1. TROUBLESHOOTING.......................................................................................491 2. SERVICING SPECIFICATIONS..............................................................................495 3. TIGHTENING TORQUES....................................................................................496 4. PRECAUTIONS AT REPAIRING REFRIGERANT CYCLE............................................................497 [1] HANDLING OF SERVICE TOOLS........................................................................499 (1) Manifold Gauge Set...........................................................................499 (2) Refrigerant Charging Hose....................................................................500 (3) Vacuum Pump Adaptor..........................................................................501 (4) Electric Gas Leak Tester.....................................................................501 (5) Can Tap Valve................................................................................501 (6) T-joint......................................................................................502 (7) R134a Refrigerant Recovery and Recycling Machine.............................................502 5. CHECKING AND CHARGING REFRIGERANT CYCLE...............................................................503 [1] CHECKING WITH MANIFOLD GAUGE.....................................................................503 [2] DISCHARGING, EVACUATING AND CHARGING.............................................................507 (1) Discharging the System.......................................................................507 (2) Evacuating the System........................................................................508 (3) Charging the System..........................................................................509 (4) Checking Charging Refrigerant Amount.........................................................511 6. CHECKING, DISASSEMBLING AND SERVICING.................................................................512 [1] CHECKING AND ADJUSTING...........................................................................512 (1) Compressor...................................................................................512 (2) Control Panel (Blower Switch, A/C Switch, Mode Control Dial and Temperature Control Dial)....513 (3) Blower Resistor..............................................................................515 (4) Blower Motor.................................................................................516 (5) Temperature Motor............................................................................516 (6) Mode Motor...................................................................................517 (7) Air Conditioner Relay and Blower Relay.......................................................517 (8) Pressure Switch..............................................................................518 (9) Wiper Switch.................................................................................519 (10) Wiper Motor.................................................................................520 (11) Defogger....................................................................................520 [2] DISASSEMBLING AND ASSEMBLING.....................................................................522 (1) Separating Cabin from Tractor Body...........................................................522 (2) Removing Compressor Assembly.................................................................526 (3) Removing Receiver and Condenser..............................................................528 (4) Removing Air Conditioner Unit................................................................528 (5) Removing Air Conditioner Pipes...............................................................530 (6) Removing Heater Hoses........................................................................532 (7) Cabin Windshields............................................................................533 (8) Wiper Motor..................................................................................537 [3] SERVICING........................................................................................538
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