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WSM B2050
Kubota WSM B2050 User Manual
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HYDRAULIC SYSTEM
B2050, B2350, B2650, B3150, WSM
8-S2
9Y1210982HYS0037US0
Implement Drop
s by
It
s Weight
1.
Piston O-ring worn or damaged
Replace O-ring or
cylinder
8-S21
2.
Control valv
e malfunctioni
ng
Replace control valve
8-S16
Symptom
Probable Cause and Checking Procedure
Solution
Reference
Page
KiSC issued 03, 2014 A
368
370
Table of Contents
Information
4
Table of Contents
4
Safety First
5
Safety Decals
8
Specifications
11
Traveling Speeds
15
Dimensions
17
General
21
1 Tractor Identification
22
2 General Precautions
23
3 Handling Precautions for Electrical Parts and Wiring
24
Wiring
24
Battery
26
Fuse
26
Connector
26
Handling of Circuit Tester
27
Color of Wiring
28
4 Lubricants, Fuel and Coolant
29
5 Tightening Torques
31
General Use Screws, Bolts and Nuts
31
Stud Bolts
31
Metric Screws, Bolts and Nuts
32
American Standard Screws, Bolts and Nuts with Unc or Unf Threads
32
Plugs
32
6 Maintenance Check List
33
7 Check and Maintenance
35
Daily Check
35
Check Points of Every 50 Hours
39
Check Points of Every 100 Hours
43
Check Points of Every 200 Hours
50
Check Points of Every 400 Hours
55
Check Point of Every 800 Hours
57
Check Point of Every 1500 Hours
57
Check Point of Every 3000 Hours
57
Check Points of Every 1 Year
57
Check Points of Every 2 Years
58
Others
60
8 Special Tools
64
Special Tools for Engine
64
Special Tools for Tractor
71
Special Tools for Cabin
74
9 Tires
77
Tire Pressure
77
Wheel Adjustment
78
Front Wheels
78
Rear Wheels
79
Ballast
80
10 Implement Limitations
82
Servicing
89
1 Troubleshooting
90
2 Servicing Specifications
96
3 Tightening Torques
102
Tractor Section
102
Engine Section
102
4 Checking, Disassembling and Servicing
103
Checking and Adjusting
103
Engine Body
103
Lubricating System
105
Cooling System
106
Fuel System
108
Preparation
111
Draining Lubricants and Coolant
111
Separating Engine from Clutch Housing (CABIN)
113
Separating Engine from Front Axle Frame (CABIN)
116
Separating Engine from Clutch Housing (ROPS)
116
Separating Engine from Front Axle Frame (ROPS)
119
Disassembling and Assembling
120
External Components
120
Cylinder Head and Valve and Oil Pan
121
Gear Case
123
Piston and Connecting Rod
127
Crankshaft
130
Servicing
132
Cylinder Head and Valves
132
Idle Gear and Camshaft
138
Piston and Connecting Rod
140
Crankshaft
144
Cylinder
149
Oil Pump
150
Servicing
155
Troubleshooting
156
Servicing Specifications
157
Tightening Torques
158
Checking, Disassembling and Servicing
159
Checking and Adjusting
159
Disassembling and Assembling
160
Separating Engine from Clutch Housing
160
Separating Clutch Assembly
163
Servicing
164
Mechanism
166
1 Structure
168
Manual Transmission (Without Bi-Speed Turn and MID-Pto Model)
168
Manual Transmission (Without Bi-Speed Turn and with MID-Pto Model)
168
Manual Transmission (with Bi-Speed Turn and Without MID-Pto Model)
169
Manual Transmission (with Bi-Speed Turn and MID-Pto Model)
170
Hst (with Bi-Speed Turn and MID-Pto Model)
172
2 Front Case
173
Structure (Hst with Bi-Speed Turn Model)
173
Bi-Speed Turn Linkage
174
Linkage
174
Linkage: Bi-Speed Turn "Engaged
174
Linkage: Bi-Speed Turn "Disengaged
175
Bi-Speed Turn Powertrain
176
Hydraulic Circuit
176
Bi-Speed Turn "Engaged
177
Bi-Speed Turn "Disengaged
177
3 Manual Transmission
178
Structure
178
Main Gear Shift Section
178
Shuttle Gear Shift Section
179
4 Hydrostatic Transmission
180
Structure
180
Pump and Motor
182
Oil Flow and Valves
183
Control Linkage
190
ROPS Model
190
CABIN Model
190
5 Cruise Control
191
Cruise Control Linkage [Cabin Model]
191
Cruise Control Release
192
Cruise Control Linkage (Rops Model)
193
Cruise Control
193
Cruise Control Release
194
6 Range Gear Shift Section
195
7 Front Wheel Drive Section
196
8 Pto System (Hydraulic Pto Clutch Model)
197
Structure
197
Rear Pto Section
198
Rear Pto / MID-Pto Section
199
MID-Pto Section
200
Independent Pto
201
Hydraulic Circuit
201
Independent PTO Control Valve
202
Independent PTO Clutch
203
Independent PTO Lever "Engaged
204
Independent PTO Lever "Disengaged
205
9 Pto System (Mechanical Pto Clutch Model)
206
Structure
206
Rear Pto Section
207
Rear Pto / MID-Pto Section
208
MID-Pto Section
208
One-Way Clutch System
209
10 Differential Gear System
210
Differential Function
210
Differential Lock
211
Servicing
212
Troubleshooting
213
Servicing Specifications
218
Tightening Torques
220
Checking, Disassembling and Servicing
221
Checking and Adjusting
221
Bi-Speed Turn
221
Hst
222
Independent PTO Control Valve
226
Preparation
227
Draining Lubricants and Coolant
227
Separating Transmission from Tractor Body (CABIN)
229
Separating Engine and Clutch Housing (CABIN)
233
Separating Transmission from Tractor Body (ROPS)
233
Separating Engine and Clutch Housing (ROPS)
235
Disassembling and Assembling
236
Front Case
236
Main Gear Shift Section
241
Mechanical PTO Clutch Assembly
243
Hydrostatic Transmission (HST)
246
PTO Clutch Case (HST Model)
256
Bevel Pinion Shaft
257
Range Gear Shaft
258
Front Wheel Drive Shaft
259
Independent PTO Clutch Shifter
260
Independent PTO Clutch
262
MID-PTO Section
266
Differential Gear Section
268
Servicing
269
Bi-Speed Turn Clutch
269
Mechanical PTO Clutch
269
Hst
270
Independent PTO Clutch
273
Transmission Case
274
Differential Gear
275
Rear Axle
278
Servicing
293
Troubleshooting
294
Servicing Specifications
295
Tightening Torques
296
Checking, Disassembling and Servicing
297
Checking and Adjusting
297
Disassembling and Assembling
298
Brake Pedal (Cabin HST Model)
298
Brake Pedal (ROPS Manual Transmission Model)
300
Brake Pedal (ROPS HST Model)
300
Parking Brake Lever
301
Separating Rear Axle Case
301
Servicing
305
Front Axle
306
Servicing
309
1 Troubleshooting
310
2 Servicing Specifications
311
4 Checking, Disassembling and Servicing
313
Checking and Adjusting
313
Disassembling and Assembling
314
Separating Front Axle Assembly
314
Disassembling Front Axle Assembly
315
Servicing
321
Mechanism
326
Hydraulic Circuit
327
Steering Controller
328
Steering Cylinder
329
Hydraulic Pump
330
Servicing
331
1 Troubleshooting
332
2 Servicing Specifications
334
4 Checking, Disassembling and Servicing
336
Checking
336
Relief Valve
336
Hydraulic Pump for Power Steering
336
Disassembling
336
Separating Power Steering Controller (CABIN Type)
336
Separating Power Steering Controller (ROPS Type)
338
Power Steering Controller (ROPS Type)
338
Power Steering Cylinder
339
Servicing
341
Power Steering Cylinder
341
Hydraulic System
342
Mechanism
343
1 Hydraulic Circuit
344
Manual Transmission Model (Without Bi-Speed Turn)
344
Manual Transmission Model (with Bi-Speed Turn)
345
Hst Model
346
2 Hydraulic Pump
347
3 Three Points Hydraulic System
348
Hydraulic Circuit
348
Manual Transmission Model (Without Front Loader Valve)
348
HST Model (with Front Loader Control Valve)
348
Relief Valve
349
Manual Transmission Model (Without Front Loader Valve)
349
HST Model (with Front Loader Control Valve)
350
Position Control Valve
351
Structure
351
Operation
352
Feedback Linkage for Position Control
354
4 Front Loader Control Valve (if Equipped)
355
Structure
355
Operation
356
5 Remote Control Valve (if Equipped)
363
6 Hydraulic Outlet
364
Manual Transmission Model
364
Front Hydraulic Outlet
364
Rear Hydraulic Outlet
365
Hst Model
366
Rear Hydraulic Outlet
366
Servicing
367
2 Servicing Specifications
370
4 Checking, Disassembling and Servicing
373
Checking and Adjusting
373
Hydraulic Pump (for 3-Point Hitch Hydraulic System)
373
Hydraulic Pump (for Power Steering, Bi-Speed Turn, PTO Clutch and HST)
375
3-Points Hitch Relief Valve
377
Lift Arm
378
Disassembling and Assembling
378
Hydraulic Pump
378
3-Point Hitch
380
Separating Hydraulic Cylinder from Tractor Body (ROPS Model)
380
Separating Hydraulic Cylinder from Tractor Body (CABIN Model)
381
3-Points Hitch: Hydraulic Cylinder
382
Front Loader Control Valve Assembly (if Equipped)
386
Remote Control Valve (if Equipped)
389
Servicing
389
Mechanism
392
1 Wiring Diagram
393
Rops Model (Except for B3150)
393
B3150 Rops
394
Cabin Model
395
2 Engine Starting System and Stopping System
396
Opc System Circuit
396
Controller
397
Safety Switch
402
PTO Select Lever Switch (Only Model with MID PTO)
403
PTO Clutch Lever Switch
404
HST Pedal Switch (HST Model)
404
Shuttle Shift Lever Switch (Manual Transmission Model)
405
Seat Switch
405
Parking Brake Switch
405
Starter
406
Key Stop Solenoid
406
Glow Plug
407
3 Charging System
408
Alternator
409
IC Regulator
410
4 Lighting System
411
Head Light
411
Turn Signal Light
413
Hazard Light
415
Beacon
417
Brake Light
419
Work Light (Cabin Model Only)
420
Trailer Socket
421
5 Instrument Panel
422
Easy Checker
422
Gauges and Other Indicators
423
Error Code Display (Cabin Model Only)
425
Switches and Sensors
425
Servicing
428
1 Troubleshooting
429
2 Servicing Specifications
435
4 Checking and Adjusting
437
Battery
437
Fuse
438
Relays
439
Relays (ROPS Model)
439
Relays (CABIN Model)
441
Starting System
443
Key Switch
443
Safety Switches
445
OPC Controller
446
Starter
447
Glow Plug
448
Charging System
449
Alternator
449
Lighting System
450
Combination Switch (ROPS Model)
450
Combination Switch (CABIN Model)
452
Hazard Switch (Cabin Model Only)
454
Beacon Switch
455
Flasher Unit
456
Brake Lamp Switch
457
Work Light Switch (CABIN Model Only)
458
Dome Light (CABIN Model Only)
459
Warning Lamp, Indicator Lamp and Gauge
460
Instrument Panel (ROPS Model)
460
Instrument Panel (CABIN Model)
461
Engine Oil Pressure Switch
462
Coolant Temperature Sensor (ROPS Model)
463
Coolant Temperature Sensor (CABIN Model)
464
Fuel Sensor
465
Bi-Speed Turn Switch
465
Engine Rotation Sensor (CABIN Model Only)
466
Display Switch
467
5 Disassembling and Assembling
468
Starter
468
Alternator
468
6 Servicing
471
Starter
471
Alternator
472
Mechanism
475
1 Outline of Air Conditioning System
476
Structure
476
Air Conditioning System
478
2 Refrigeration System
479
Compressor
479
Pressure Relief Valve
480
Magnetic Clutch
480
Condenser
481
Receiver
482
Air Conditioner Unit
483
Evaporator
484
Heater Core
485
3 System Control
486
4 Electrical System
487
Electrical Circuit
487
Relay
488
Servicing
490
1 Troubleshooting
491
2 Servicing Specifications
495
4 Precautions at Repairing Refrigerant Cycle
497
Handling of Service Tools
499
Manifold Gauge Set
499
Refrigerant Charging Hose
500
Vacuum Pump Adaptor
501
Electric Gas Leak Tester
501
Can Tap Valve
501
T-Joint
502
R134A Refrigerant Recovery and Recycling Machine
502
5 Checking and Charging Refrigerant Cycle
503
Checking with Manifold Gauge
503
Discharging, Evacuating and Charging
507
Discharging the System
507
Evacuating the System
508
Charging the System
509
Checking Charging Refrigerant Amount
511
6 Checking, Disassembling and Servicing
512
Checking and Adjusting
512
Compressor
512
Control Panel (Blower Switch, A/C Switch, Mode Control Dial and Temperature Control Dial)
513
Blower Resistor
515
Blower Motor
516
Temperature Motor
516
Mode Motor
517
Air Conditioner Relay and Blower Relay
517
Pressure Switch
518
Wiper Switch
519
Wiper Motor
520
Defogger
520
Disassembling and Assembling
522
Separating Cabin from Tractor Body
522
Removing Compressor Assembly
526
Removing Receiver and Condenser
528
Removing Air Conditioner Unit
528
Removing Air Conditioner Pipes
530
Removing Heater Hoses
532
Cabin Windshields
533
Wiper Motor
537
Servicing
538
4
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Kubota WSM B2050 Specifications
General
Brand
Kubota
Model
WSM B2050
Category
Tractor
Language
English
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