YANMAR B22-2 B22-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOADΒ
YANMAR B22-2 B22-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD:
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YANMAR B22-2 B22-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOADYANMAR B22-2 B22-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD
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YANMAR B22-2 B22-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOADΒ
Correct work means the quickest possible completion of according to the correct procedures and the specified standards.
It is important when conducting certain operations always to bear in mind the equipment, tools, gauges, materials, oil and grease, etc. that you must have ready, as well as items to be checked, adjusted, or disassembled, and cautions to watch out for.
(1) Never attempt servicing while engine is running or immediately after stopping operation. (2) Wear work cloths, safety shoes and helmet. (3) Check the equipment and tools before use. Especially, be sure to check the crane, lifting equipment and tools.
(4) When working together with other persons, allocate everyoneβs share of job, arrange the signals and act in concert with the other persons. (5) The operation of the crane and slinging work must be performed by qualified persons.
(6) Do not enter or pass under the raised load. (7) Lift and support the massive parts by crane before removing the installation bolts. (8) Disconnect cables from battery before repairing the electric system.
(9) Remove the battery when welding the machine. (1) Check the service record of the machine. (That is, check how many months or hours the machine has been used since the preceding overhaul, what was the trouble then and what parts were replaced.)
(2) Have all servicing tools ready, i.e., tools, measuring devices (which have received periodic maintenance), containers, oil & grease, etc. (3) Have the service literature (operation manual, parts catalog, etc.) ready.
(1) Clean the machine before disassembly. (2) Check and record the condition of the machine before disassembly : β’ Model, machine number, operation hours β’ Reasons for repair, history of repair β’
Contamination of filters β’ Fuel and oil condition β’ Damage to parts, etc. (3) Place alignment marks on the necessary parts to facilitate reassembly. (4) Clean all the removed parts and new replacement parts and put them in order. (5) Use new seals, split pins, etc. for reassembly.
TABLE OF CONTENTS:
YANMAR B22-2 B22-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOADΒ
FOREWORD............................................................................................. 2
CONTENTS............................................................................................. 3
1 GENERAL CAUTIONS FOR MAINTENANCE WORK.............................................................. 6
1-1 Correct Work................................................................................. 7
1-2 Safety Precautions........................................................................... 7
1-3 Preparations................................................................................. 7
1-4 Cautions for Disassembly and Reassembly...................................................... 7
1-5 Cautions for Attaching and Detaching Hydraulic Equipment..................................... 8
1-6 Cautions for Attaching and Detaching Hydraulic Piping........................................ 8
1-7 Cautions for Handling Seals.................................................................. 8
1-8 Correct installation of Hydraulic Hose....................................................... 9
1-9 Specifications of Hydraulic Hose............................................................. 11
1-10 Air-Venting of hydraulic Equipment.......................................................... 14
2 TECHNICAL DATA..................................................................................... 15
2-1 Specifications............................................................................... 16
2-2 External Drawing and Working Ranges.......................................................... 23
2-2-1 Canopy Type Specifications............................................................. 23
2-2-2 Cabin Type Specifications.............................................................. 24
2-3 Weight of Main Parts......................................................................... 25
2-4 Lifting Capacities........................................................................... 26
3 SERVICING STANDARDS................................................................................ 27
3-1 Machine Performance.......................................................................... 28
3-2 Engine....................................................................................... 32
3-3 Unsercarriage................................................................................ 34
3-3-1 Rubber Track Specifications............................................................ 34
3-3-2 Steel Track Specifications............................................................. 35
3-3-3 Steel & Rubber Track Common Specifications............................................. 36
3-4 Control Devices.............................................................................. 37
3-5 Hydraulic Equipment.......................................................................... 38
3-5-1 Hydraulic Cylinder..................................................................... 38
3-6 Work Implement............................................................................... 39
3-6-1 Front Attachment....................................................................... 39
3-6-2 Dozer Moving Device.................................................................... 40
3-6-3 Bucket Teeth........................................................................... 40
3-7 List of Tightening Torque.................................................................... 41
3-7-1 Machine................................................................................ 41
3-7-2 Engine................................................................................. 43
3-7-3 Tightening Toque of General Bolts and Nuts............................................. 43
4 ENGINE............................................................................................. 44
4-1 Cylinder Block............................................................................... 45
4-2 Cylinder Head................................................................................ 46
4-3 Piston and Piston Pins....................................................................... 54
4-4 Connecting Rods.............................................................................. 57
4-5 Crankshaft and Main Bearing Metal............................................................ 60
4-6 Camshaft and Tappets......................................................................... 62
4-7 Timing Gear.................................................................................. 64
4-8 Lubrication System........................................................................... 66
4-9 Cooling System............................................................................... 73
4-10 Fuel Supply System......................................................................... 75
4-11 Construction of Governor.................................................................... 83
4-12 Electrical Equipment........................................................................ 85
4-13 Alarm Device................................................................................ 87
5 HYDRAULIC SYSTEM................................................................................... 89
5-1 Outline...................................................................................... 90
5-1-1 Function of Control Valve.............................................................. 94
5-2 Hydraulic Circuit Schematic.................................................................. 97
5-3 Operationg Circuit........................................................................... 99
5-3-1 Boom................................................................................... 99
5-3-2 Arm....................................................................................102
5-3-3 Bucket ................................................................................105
5-3-4 Swing..................................................................................108
5-3-5 Boom Swing.............................................................................112
5-3-6 Dozer..................................................................................115
5-3-7 Traveling .............................................................................118
5-3-8 Simultaneous Operation of Arm and Boom Swing...........................................122
5-3-9 Hydraulic P.T.O........................................................................125
5-4 Hydraulic System.............................................................................134
5-4-1 Hydraulic Pump.........................................................................134
5-5 Cut-offValve.................................................................................208
5-6 Pilot Valve..................................................................................219
5-7 Control Valve................................................................................246
5-7-1 Operation Principle....................................................................246
5-8 Swing Motor..................................................................................273
5-9 Travel Motor.................................................................................290
5-10 PTO Selector Valve(for Merging with Hydraulic PTO)..........................................333
5-11 Pressure Adjustment.........................................................................335
5-11-1 Relief Valve..........................................................................335
5-11-2 Swing Brake Valve.....................................................................337
5-11-3 Cutt-off Valve........................................................................338
6 ADJUSTMENT PROCEDURES FOR EACH EQUIPMENT...........................................................340
6-1 Electrical Equipment of the Machine..........................................................341
6-1-1 Arrangement of Electrical Equipment and Names of parts.................................341
6-1-2 Monitor and Alarm Systems..............................................................343
6-1-3 Wiring Diagram.........................................................................347
6-2 Undercarriage................................................................................348
6-2-1 Outline................................................................................348
6-2-2 Major Parts............................................................................348
6-2-3 Cautions for Reassembly (Rubber Track Models)..........................................349
6-2-4 Cautions for Reassembly (Steel Track Models)...........................................350
6-2-5 Disassembly and Reassembly of Idler....................................................352
6-2-6 Assembly of Idler......................................................................353
6-2-7 Assembly of Track Adjuster.............................................................353
6-2-8 Disassembly and Reassembly of Track Roller.............................................354
6-2-9 Drawing of Jigs........................................................................355
6-3 Controls ....................................................................................356
6-3-1 Control Train..........................................................................356
6-3-2 Disassembly and Reassembly of Mechanical Control Linkage...............................357
6-3-3 Adjustment of Lock Lever...............................................................359
6-3-4 Adjustment of Implements and Swing Control levers (for Semi-long lever type only.......361
6-3-5 adjustment of travel Levers............................................................362
6-3-6 Adjustment of 2-Speed Pedal............................................................363
6-3-7 Adjustment of Boom Swing Pedal.........................................................365
6-3-8 Adjustment of Dozer Lever..............................................................366
6-3-9 Adjustment of Engine Speed Control.....................................................367
6-4 Swing System.................................................................................368
6-4-1 Swing Bearing..........................................................................368
6-5 Hydraulic Equipment..........................................................................370
6-5-1 Remove and Install Hydraulic Pump......................................................370
6-5-2 Disassembly and Reassembly of Hydraulic Cylinder.......................................375
6-5-3 Swivel Joint...........................................................................376
6-5-4 Reservoir..............................................................................380
6-5-5 Hydraulic Piping Layout................................................................382
6-6 Cabin........................................................................................396
6-6-1 Removal and Installation of Cabin......................................................396
6-6-2 Installation of Defroster..............................................................404
7 PERIODIC INSPECTION................................................................................405
7 List of Periodic Inspection and Servicing......................................................406
8 FUEL,LUBE OIL AND GREASE RECOMMENDED...............................................................408
8 Fuel,Lube Oil and Grease Recommended by Yanmar.................................................409
9 TROUBLESHOOTING....................................................................................410
9-1 Non-breakdowns...............................................................................411
9-1-1 Natural Release of Bucket..............................................................411
9-1-2 Discontinuous Arm Movement.............................................................411
9-1-3 Drifting of Upperstructure Quick Travel Operation......................................412
9-1-4 Thermal Shock of Travel Motor..........................................................413
9-1-5 Elongation of Boom Swing Cylinder on 90γSwing..........................................414
9-1-6 Time Lag on Switching Travel Speed.....................................................415
9-1-7 Reservoir Oil Level Fluctuation through Temperature Change.............................416
9-1-8 Autmatic Return from 2nd Speed to 1st Speed during low Speed Travel Motor Operation....417
9-2 Troubleshooting..............................................................................418
9-2-1 Machine and Engine.....................................................................418
9-2-2 Electrical Equipment on Panel..........................................................439
10 REFERENCE DATA....................................................................................447
10-1 Bucket Installtion Dimension................................................................448
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