YANMAR B25V EXCAVATOR SERVICE MANUAL – PDF DOWNLOAD
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YANMAR B25V 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 B25V 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 Removal and Installation of
Hydraulic Equipment ……………………………… 1-2
1-6 Cautions for Removal and Installation of
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 Release of Hydraulic Equipment ············1-9
CHAPTER 2
TECHNICAL DATA
2-1 Specifications ··············:······························2-1-1
2-2 Machine Dimensions and Working Ranges ···2-2-1
2-2-1 Canopy Type ··········································2-2-1
2-2-2 Cabin Type …………………………………… 2-2-2
2-3 Component Weights ……………………………… 2-3-1
2-4 Lifting Capacities ························· ………….. 2-4-1
CHAPTER 3
SERVICING STANDARDS
3-1 Machine Performance ········· …………………… 3_1_1
3-2 Engine ………………………………………………… 3-2-1
3-3 Undercarriage ············· ………………………….. 3_3_ 1
3-3-1 Rubber Crawler Specifications …………… 3_3_1
3-3-2 Steel Crawler Specifications ……………… 3_3_2
3-3-3 Common Specifications of
Steel & Rubber Crawlers· .. ··· ……………… 3_3_3
3-4 Control Devices···· .. ·· ………………………………. 3_4_1
3-5 Hydraulic Equipment …………………………… 3-5-1
3-5-1 Hydraulic Cylinder …………………………… 3-5-1
3-6 Work Implements ………………………………… 3-6-l
3-6-1 Front Attachments …………………………… 3-6-1
3-6-2 Blade 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 for General Bolts
and Nuts ………………………………………… 3_7_3
CHAPTER 4
ENGINE
4-1 Measurement. Inspection and Adjustment … 4-1-1
4-1-1 Measuring the Compression Pressure … · .. 4-1-1
4-1-2 Adjusting the Valve Head Clearance …… 4-1-3
4-1-3 Checking the V-belt Tension ……………… 4-1~4
4-1-4 Checking the Fuel Injection Valve ……… 4-1-4
4-1-5 Checking and Adjusting
the Fuel Injection Timing ………………… 4-1-8
4-1-6 Adjusting the No-load Maximum
(or Minimum) Revolutions ………………… 4- l-9
4-1-7 Checking the Cooling Water System
and Radiator forWater Leakage ………… 4-1-9
4-1-8 Checking the Sensors ············· ………….. 4_1-10
4-2 Measuring Procedure,
Service Data and Corrective Action …………… 4-2-1
4-2-1 Cylinder Head ………………………………… 4-2-1
4-2-2 Cylinder Block ………………………………… 4-2-7
4-2-3 Valve Rocker Arm ………………………… 4-2-10
4-2-4 Pistons and Piston Ring ………………… ···4-2-12
4-2-5 Connecting Rod ……………………………… 4-2-17
4-2-6 Camshaft ……………………………………… 4-2-20
4-2-7 Crankshaft …………………………………… 4-2-22
4-2-8 Gears …………………………………………… 4-2-25
4-2-9 Trochoid Pump …………… ., ………………. 4-2-27
4-3 Precautions Reassembly ………………………… 4-3-1
4-4 Fuel Supply System ……………………………… 4-4-1
4-4-1 Fuel Injection Pump ………………………… 4-4-1
4-4-2 Fuel Feed Pump ……………………………… 4_4_3
4-4-3 Fuel System ····.•···· .. ·· ……………………….. 4_4_4
4-4-4 Fuel Injection Valve ………………………… 4_4_4
4-4-5 Governor Mechanism ……………………….. ·4-4-5
4-4-6 Specification of Fuel Injection Pump …… 4-4-8
4-4-7 Service Date for
Fuel Injection Equipment ………………… 4_4_9
4-5 Electrical Equipment …………. ; ….•…………….. 4-5-1
4-5-1 Starter Motor … ; …………………………….. 4_5_1
4-5-2 Alternator ……………………………………… 4_5_3
4-5-3 Air Heater ……………………………………… 4_5.4
CHAPTER 5
HYDRAULIC SYSTEM
5-1 ·Out Ii ne ………………………………………………… 5-1-1
5-1-1 Control Valve Operation …………………… 5-1-4
5-1-2 Additional Operation of Control Valve … 5-1-6
5-2 Hydraulic Circuit Schematic …………………… 5-2-1
5-2-1 Standard Specifications ……………………… 5-2-1
5-3 Circvit Operation …………………………………… 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_9
5-3~6 Blade ………………………………………….. ··5-3-11
5-3-7 Travel······················~········ ……………….. 5-3_ 13
5-3-8 Simultaneous Operation of Travel
and Boom/Bucket ·••············ .. ·•·· ………… 5_3a15
5-3-9 Simultaneous Operation of Travel ·
and Arm/Boom Swing …………………… 5.3.17
5-3-10 Simultaneous Operation of Boom•
and Bucket …………………………………… 5-3-19
5-3-11 Simultaneous Operation of Arm
and Bucket …………………………………… 5-3-21
5-3-12 Hydraulic P.T.O … ····· ………… ; …………. 5_3_23
5-4 Pressure Adjustment ·•··· …………………………. 5_4_ 1
5-4-1 Relief Valves··············· ………………………. 5_4-1
5-4-2 Swing Brake Valve …………………………… 5.4_3
5-4-3 Cut-off Valve····:··· .. ··· .. ······ ………………… 5_4_4
CHAPTER 6
HYDRAULIC EQUIPMENT
6-1 Hydraulic Pump …………………………………… 6-1-1
6-2 Control Valve …………………… ; ……………….. 6-2-1
6-3 Pilot Valve …………………………………………… 5.3.1
6-4 Swing Motor ……… , ……………………………….. 5.4.1
6-5 Travel Motor ········ …………………………………. 5.5.1
CHAPTER 7
ADJUSTMENT AND REPAIR
7-1 Electric Equipment of the Machine …………… 7-1-1
7-1-1 Arrangement of Electrical Equipment
and Names of Parts ……….. ···· …………… 7-1 ° 1
7-1-2 Monitor aild Ala~m Systems .. ,, .. ; …… : .. :.7.:.1.3
7-1-3 Wiring Diagram .· •. ; .. ~ .• ~ …………. ~: …… ~; ….. 7_.,_7
7-2 Undercarriage ·····•···· ……………………. ; ……… 7_2_1
7-2-1 Outline …………………………………………… 7-2-1
7-2-2 Major Parts …………………………………… 7-2-l
7-2-3 Points of Reassembly
(Rubber Crawler Models)·· ……………. ; ….. 7-2-2
7-2-4 Points of Reassembly
(Steel Crawler Mo.dais) …….. ; ……………… 7-2-3
7-2-5 Disassembly and Reassembly of Idler … 7-2-5
7-2-6 Installation of Idler Assembry ……… ; ….. 7-2-6
7-2-7 Disassembly and Reassembly of
Track Roller …………………………………… 7-2-7
7-2-8 Disassembly and Reassembly of
Carrier Roller ………………………………… 7.2-8
7-2-‘9 Drawing of Jig ………………………………… 7-2-9
7-3 Control •.••·· ………………………………………. ; … 7~3~ 1
7-3-1 Control Train …………………………………. 7-3-1
· 7-3-2 Disassembly and Reassembly of
Mechanical Control Linkage ……………… 7.3.2
7-3-3 Adjustment of Lock Lever ………………… 7.3_4
7-3-.4 Adjustment of Implements and Swing
Control Levers
(for Semi-long Lever Type Only) ………… 7_3_5
7-3-5 Adjustment of Travel Levers ……………… 7.3.7
7-3-6 Adjustment of 2-Speed Pedal ……………… 7-3-8 ·
7-3-7 Adjustment of Boom Swing Pedal ……… 7_3_9
7-3-8 Adjustment of Blade Lever ……………… 7-3-10
7-3-9 Adjustment of Engine Speed Control …… 7_3_11
7-4 Swing Bearing ……………………………………… 7.4.1
7-5 Hydraulic Equipment …………………………… 7_5_1
7-5-1 Precautions for Removal and I nstal I at ion,
and Assembly of Hydraulic Pump ……… 7.5.1
7-5-2 Disassembly and Reassembly of
Hydraulic Cylinder …………………………… 7.5_5
7-5-3 Swivel Joint …………………………………… 7.5.7
7-5-4 Hydraulic Oil Tank ………………………… 7-5-11
7-5-5 Piping Layout ………………………………… 7-5-13
CHAPTER 8
PERIODIC INSPECTION
AND SERVICING
8. List of Periodic Inspection and Servicing·········8-1-1
CHAPTER 9
FUEL, LUBE OIL AND GREASE
RECOMMENDED
9. Fuel, Lube Oil and Grease
Recommended by Yanmar ···························9-1-1
CHAPTER 10
TROUBLESHOOTING
10-1 Non-breakdowns ······································· 10-1-1
10-1-1 Natural Release of Bucket ··················10-1-1
10-1-2 Discontinuous Arm Movement ············10-1-1
10-1-3 Drifting of Upperstructure on
Ou ick Travel Operation …………………… 10-1-2
10-1-4 Thermal Shock of Travel Motor···· …….. 10-1-3
10-1-5 Elongation of Boom Swing Cylinder
on 80 degrees Swing ……………………… 10-1-4
10-1-6 Time Lag on Travel Speed Switching … 10-1-5
10-1-7 Fluctuation in Oil Level
of Hydraulic Oil Tank
Due to Temperture Change ……………… 10-1-6
10-2 Troubleshooting ………………………………… 10-2-1
10-2-1 Machine and Engine ……………………… 10-2-1
10-2-2 Electrical Equipment on Panel······ …… 10-2-22
CHAPTER 11
REFERENCE DATA
11-1 Specifications for Attachment ………………… 11-1-1
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