YANMAR B5-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD

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YANMAR B5-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD

YANMAR B5-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD:

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YANMAR B5-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD

• 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 everyone’s 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 : • Model, machine number, operation hours • Reasons for repair, history of repair •
• Contamination of filters • Fuel and oil condition • 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 B5-2A EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD

CHAPTER 1
GENERAL CAUTIONS FOR
MAINTENANCE WORK
1-1 Correct Work……………………………………………… 1-1
1-2 Safety Precautions . . . . . . . .. .. . . .. . . . . .. … .. . … . .. … .. .. .. .. . 1-1
1-3 Preparations …………………………………. ……………. 1-1
1-4 Cautions for Disassembly and Reassembly … 1-1
1-5 Cautions for Attaching and Detaching
Hydraulic Equipment ………………………….. ……….. 1-2
1-6 Cautions for Attaching and Detaching
Hydraulic Piping ………………………………………….. 1-2
1-7 Cautions for Handling Seals . … … .. . … .. … . … …… 1-2
1-8 Correct installation of Hydraulic Hose . .. ……. … 1-3
1-9 Specifications of Hydraulic Hose …. ………….. …. 1-5
1-10 Air-Venting of Hydraulic Equipment…………… 1-8R
CHAPTER 2
TECHNICAL DATA
2-1 Specifications .. . .. …. .. .. .. .. .. .. . .. .. . .. . . . .. …. .. . .. … .. . .. . 2-1-1 R
2-2 External Drawings and Working Ranges …… 2-2-1 ·
2-2-1 Canopy Type Specifications ……………… 2-2-1
2-2-2 Cabin Type Specifications . .. .. …. ……. ….. 2-2-2
2-3 Weight of Main Parts ………………………………. 2-3-1 R
2-4 Lifting Capacities ………………………………………. 2-4-1
CHAPTER 3
SERVICING STANDARDS
3-1 Machine Performance ……………. ….. …. ………… 3-1-1 R
3-2 Engine……………………………………………………… 3-2-1
3-3 Undercarriage ………………….. …… ….. …………….. 3-3-1
3-3-1 Rubber Track Specifications ……………… 3-3-1
3-3-2 Steel Track Specifications …. ……… …. …. 3-3-2
3-3-3 Steel & Rubber Track Common
Specifications .. .. . .. .. . .. .. .. .. .. .. . . .. . . .. …… …. … 3-3-3
3-4 Control Devices … . ….. .. .. .. . . .. .. . . . . . . . . . . .. . . .. .. . .. . .. . . 3-4-1 R
3-5 Hydraulic Equipment…………………………………. 3-5-1
3-5-1 Hydraulic Cylinder …………………………….. 3-5-1
3-6 Work Implement………………………………………. 3-6-1
3-6-1 Front Attachment ……………………………… 3-6-1
3-6-2 Dozer Moving Device …… .. .. .. … .. ……….. 3-6-2
3-6-3 Bucket Teeth …………………………………… 3-6-2
3-7 List of Tightening Torque …………………………. 3-7-1
3-7-1 Machine …………………………………………… 3-7-1
3-7-2 Engine…………………………………………….. 3-7-3
3-7-3 Tightening Torque of General Bolts
and Nuts … .. … . .. .. .. .. .. .. …. … .. .. .. .. .. …. .. .. . . . 3-7-3
CHAPTER 4
ENGINE
4-1 Cylinder Block………………………………………….. 4-1-1
4-2 Cylinder Head ………………………………………….. 4-2-1
4-3 Piston and Piston Pin ……………………………… 4-3-1
4-4 Connecting Rod ……………………………………….. 4-4-1
4-5 Crankshaft and Main Bearing …………………… 4-5-1
4-6 Camshaft and Tappets…………………………….. 4-6-1
4-7 Timing Gear …………………………………………….. 4-7-1
4-8 Service Data……………………………………………. 4-8-1
4-9 Cooling System ……………………………………….. 4-9-1
4-10 Lubrication System …………………………………. 4-10-1
4-11 Fuel Supply System ……………………………….. 4-11-1
4-12 Starter Motor …………………………………………. 4-12-1
4-13 Alternator ……………………………………………….. 4-13-1
4-14 Starting Aids ………………………………………….. 4-14-1
4-15 Adjustment of Engine Output
(Engine additional data) ………………………….. 4-15-1
CHAPTER 5
HYDRAULIC SYSTEM
5-1 Outline…………………………………………………….. 5-1-1
5-1-1 Function of Control Valve ………………… 5-1-4
5-2 Hydraulic Circuit Schematic………………………. 5-2-1
5-3 Control Circuit………………………………………….. 5-3-1
5-3-1 Boom .. .. . . .. .. …. .. .. . .. .. .. . .. .. .. . .. .. ….. . …. .. …. .. 5-3-1
5-3-2 Arm …………………………………………………. 5-3-3
5-3-3 Bucket … . . . . . . … . . . . . . .. . . . . . . …. . . . . . . .. . .. … .. . . . . .. . . 5-3-5
5-3-4 Swing………………………………………………. 5-3-7
5-3-5 Boom Swing ……………………………………. 5-3-10
5-3-6 Dozer ………………………………………………. 5-3-12
5-3-7 Traveling ………………………………………….. 5-3-14
5-3-8 Simultaneous Operation of Arm
and Boom Swing Circuits ………………… 5-3-17
5-3-9 Hydraulic P.T.O ……………………………….. 5-3-19
5-4 Hydraulic System ……………………………………… 5-4-iR
5-4-1 Hydraulic oil …………………………………….. 5-4-1 R
5-5 Cut-off Valve . . . . . . .. … . . . .. . . . . . . . . . .. .. . . . . . . . . . . . . . . . . . . . . . . . 5-5-1
5-6 Pilot Valve……………………………………………….. 5-6-i
5-7 Control Valve…………………………………………… 5-7-1
5-8 Swing Motor…………………………………………….. 5-8-1
5-9 Travel Motor . . . . . .. .. .. … . . .. . …. . . … .. … .. .. .. .. . . . .. .. . . .. 5-9-1
5-10 Function of Hydraulic Cylinder
with Cushion Mechanism ………………………… 5-10-1
5-1 i P.T.O. Selector Valve …………………………….. 5-11-1
5-12 Pressure Adjustment ………………………………. 5-12-1 R
5-12-1 Relief Valves ………………………………….. 5-12-1 R
5-12-2 Swing Brake Valve ………………………… 5-12-3R
5-12-3 Cut-off Valve ………………………………….. 5-12-4R
CHAPTER 6
ADJUSTMENT PROCEDURES FOR
EACH EQUIPMENT
6-1 Electrical Equipment of the Machine ………… 6-1-1 R
6-1-1 Arrangement of Electrical Equipment
and Names of parts . .. . . . . .. . . . . . .. . .. . . . .. . . . . . . 6-1-1 R
6-1-2 Monitor and Alarm Systems …………….. 6-1-3
6-2 Undercarriage…………………………………………… 6-2-1
6-2-1 Outline…………………………………………….. 6-2-1
6-2-2 Major Parts……………………………………… 6-2-1
6-2-3 Cautions for Reassembly (Rubber
Track Models) ………………………………….. 6-2-2
6-2-4 Cautions for Reassembly (Steel Track
Models)…………………………………………….. 6-2-3
6-2-5 Disassembly and Reassembly of idler… 6-2-5
6-2-6 Disassembly and Reassembly of Track
Roller … … .. ….. .. . .. .. . .. . .. .. . .. … .. … .. .. . .. .. … .. . .. 6-2-7
6-2-7 Disassembly and Reassembly of
Carrier Roller ….. . . . .. . . .. …. .. . . .. … . . . .. . . . . .. .. .. . 6-2-8
6-2-8 Reassembly of Floating Seal ……………. 6-2-9
6-3 Controls .. . . . . . . .. . .. . . . . . . . . . . . .. . . . . . . .. . . .. . . . . . . . . . .. . . . . … .. . . 6-3-1
6-3-1 Control Train ……………………………………. 6-3-1
6-3-2 Disassembly and Reassembly of
Mechanical Control Linkage …. …………… 6-3-2
6-3-3 Adjustment of Lock Lever .. . ……… .. …. … 6-3-4
6-3-4 Adjustment of Implements and Swing
Control levers (for Semi-long lever type
only) . . . . . .. . .. .. . . . .. . . . . . . . . .. . . . .. . . . . . . . . .. . . . . . . 6-3-6
6-3-5 Adjustment of Travel Levers …………….. 6-3-7
6-3-6 Adjustment of 2-Speed Pedal . . … . .. …. .. . 6-3-8R
6-3-7 Adjustment of Boom Swing Pedal ……. 6-3-9
6-3-8 Adjustment of Dozer Lever ………………. 6-3-10
6-3-9 Adjustment of Engine Speed Control .. 6-3-11
6-4 Swing System ………………………………………….. 6-4-1
6-4-1 Swing Bearing …………………………………. 6-4-1
6-5 Hydraulic Equipment…………………………………. 6-5-1
6-5-i Hydraulic Pump Drive ………………………. 6-5-1
6-5-2 Disassembly and Reassembly of
Hydraulic Cylinder …………………………….. 6-5-3
6-5-3 Swivel joint …. ….. ….. ………………………….. 6-5-4
6-5-4 Reservoir ……………………… …………… ……. 6-5-8
6-5-5 Hydraulic Piping Layout ……………………. 6-5-10
6-6 Cabin ………………………………………………………. 6-6-1
6-6-i Removal and Installation of Cabin ……. 6-6-1
6-6-2 Installation of Defroster …………………….. 6-6-9
CHAPTER 7
PERIODIC INSPECTION
AND SERVICING
7. List of Periodic Inspection and
Servicing ……………………………………………………… 7-1-1
CHAPTER 8
FUEL, LUBE OIL AND GREASE
RECOMMENDED
.8. Fuel, Lube Oil and Grease
Recommended …………………………………………….. 8-1-1
CHAPTER 9
TROUBLESHOOTING
9-1 Non-breakdowns .. . . . . . .. . .. . . . . . .. . .. .. .. . .. . . . .. .. . … . .. .. . 9-1-1
9-1-1 Natural Release of Bucket .. .. …. ……… … 9-1-1
9-1-2 Discontinuous Arm Movement ………….. 9-1-1
9-1-3 Drifting of Upperstructure
Quick Travel Operation …………… ….. …… 9-1-2
9-1-4 Thermal Shock of Travel Motor ……….. 9-1-3
9-1-5 Elongation of Boom Swing Cylinder
on90°Swing ………………………………….. 9-1-4
9-1-6 Time Lag on Switching Travel
Speed . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . .. . .. . . .. .. . . . .. . . . . . . . . 9-1 -5
9-1-7 Reservoir Oil Level Fluctuation
through Temperature Change …………… 9-1-6
9-1-8 Automatic Return from 2nd Speed
to 1 st Speed during Low Speed
Travel Motor Operation …………………….. 9-1-7
9-2 Troubleshooting………………………………………… 9-2-1
9-2-1 Machine and Engine ………………………… 9-2-1
9-2-2 Electrical Equipment on Panel ………….. 9-2-22
CHAPTER 10
REFERENCE DATA
10-1 Procedures for Steel Track/Rubber
Track Exchange ………………………………… 10-1-i

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