Kubota U48-4 U55-4 Excavator Workshop Manual – PDF DOWNLOAD
DESCRIPTION:
Kubota U48-4 U55-4 Excavator Workshop Manual – PDF DOWNLOAD
TO THE READER
This Workshop Manual provides service personnel with information about the mechanisms, service
and maintenance of the construction machinery. This Workshop Manual is divided into 3 sections,
General, Mechanisms and Service.
General
This section contains information such as engine and equipment ID numbers, general precautions,
maintenance schedules, inspections and maintenance items and special tools.
Mechanisms
This section describes the structure of mechanisms and explains their functions.Be sure that you
fully understand this Mechanisms section prior to performing any service work, such as troubleshooting
or when performing any disassembly or assembly work.
Service
This section contains information and procedures for performing maintenance on the backhoe, such
as troubleshooting, service specification tables, torque specifications, items to be inspected and
adjusted, disassembly and assembly procedures, as well as precautions, maintenance standard values
and usage limits.
All of the illustrations, specifications and other information in this manual were created based on the
latest model at the time of publication.
Please be aware that changes to the content may be made without prior notice.
TABLE OF CONTENTS:
Kubota U48-4 U55-4 Excavator Workshop Manual – PDF DOWNLOAD
INFORMATION
1. SAFETY FIRST …………………………………….. I-1
2. SAFETY DECALS …………………………………. I-4
1. CHECKING EXCAVATOR
IDENTIFICATION ………………………………….G-1
2. ENGINE IDENTIFICATION …………………….G-2
3. GENERAL PRECAUTIONS…………………….G-4
4. HANDLING PRECAUTIONS FOR
ELECTRICAL PARTS AND WIRING………..G-8
5. TIGHTENING TORQUES……………………..G-12
6. NEW PRODUCT FEATURE
(EUROPEAN VERSION) ………………………G-17
7. NEW FEATURES OUTLINE………………….G-20
8. QUALITY SPECIFICATIONS ………………..G-22
9. WATER AND OIL QUANTITY ……………….G-33
10. DESCRIPTION OF PARTS …………………..G-34
11. MAINTENANCE CHECK LIST ………………G-41
MACHINE BODY
CONTENTS
SERVICING
1. FRONT OPERATING MACHINE…………… 1-S1
2. SWIVEL FRAME…………………………………. 1-S3
3. TRACK FRAME………………………………… 1-S21
ENGINE
CONTENTS
GENERAL
1. ENGINE……………………………………………..2-G1
2. SPECIAL TOOLS ………………………………..2-G5
MECHANISM
1. FEATURE…………………………………………. 2-M1
2. ENGINE BODY………………………………….. 2-M2
3. LUBRICATING SYSTEM…………………….. 2-M7
4. COOLING SYSTEM …………………………… 2-M8
5. FUEL SYSTEM………………………………… 2-M10
SERVICING
1. TROUBLESHOOTING…………………………. 2-S1
2. SERVICING SPECIFICATIONS ……………. 2-S4
3. TIGHTENING TORQUES…………………… 2-S10
4. CHECKING, DISASSEMBLING AND
SERVICING ……………………………………… 2-S13
HYDRAULIC SYSTEM
CONTENTS
MECHANISM
1. DIAGRAM OF HYDRAULIC CIRCUIT…… 3-M1
2. HYDRAULIC DEVICE LAYOUT …………… 3-M3
3. FEATURES……………………………………….. 3-M4
4. PUMP ………………………………………………. 3-M8
5. CONTROL VALVE……………………………. 3-M32
6. SWIVEL MOTOR……………………………… 3-M54
7. TRAVEL MOTOR……………………………… 3-M60
8. HYDRAULIC CYLINDER…………………… 3-M82
9. PILOT VALVE………………………………….. 3-M92
10. UNLOAD VALVE ……………………………. 3-M103
11. HOLDING VALVE…………………………… 3-M107
12. SERVICE PORT …………………………….. 3-M111
SERVICING
1. PUMP…………………………………………………3-S1
2. CONTROL VALVE……………………………..3-S34
3. SWIVEL MOTOR……………………………….3-S63
4. SWIVEL JOINT ………………………………….3-S77
5. TRAVEL MOTOR……………………………….3-S81
6. HYDRAULIC CYLINDER…………………..3-S140
7. PILOT VALVE (CONTROL)……………….3-S153
8. PILOT VALVE (TRAVEL)…………………..3-S163
9. PILOT VALVE (BLADE, SWING)………..3-S173
10. UNLOAD VALVE ……………………………..3-S184
11. THIRD LINE VALVE ASSEMBLY……….3-S189
12. ROUTING OF HYDRAULIC HOSES…..3-S191
13. BOOM HOLDING VALVE………………….3-S217
14. MEASURING HYDRAULIC DEVICE
PERFORMANCE……………………………..3-S223
15. TROUBLESHOOTING………………………3-S244
ELECTRICAL SYSTEM
SERVICING
1. ELECTRONIC DEVICE LAYOUT…………..4-S1
2. WIRING CIRCUIT ………………………………..4-S2
3. TROUBLESHOOTING (START-UP
EQUIPMENT VERSION) …………………….4-S13
4. INSPECTIONS…………………………………..4-S15
5. Instrument Panel Operating Guide ……….4-S22
6. TROUBLESHOOTING (METER
PANEL EDITION) ………………………………4-S77
CABIN
MECHANISM
1. AIR CONDITIONING SYSTEM…………….. 5-M1
2. WIPER ……………………………………………. 5-M20
SERVICING
1. TROUBLESHOOTING………………………….5-S1
2. MAINTENANCE AND
SERVICE RELATED SPECIFICATIO
NS……………………………………………………..5-S4
3. TORQUE…………………………………………….5-S5
4. PRECAUTIONS WHEN REPAIRING
THE REFRIGERANT SYSTEM ……………..5-S6
5. INSPECTING AND CHARGING THE
REFRIGERANT SYSTEM …………………..5-S12
6. INSPECTION AND DISASSEMBLY……..5-S21
7. CABIN REMOVAL AND MOUNTING ……5-S38
8. WINDOW WASHER …………………………..5-S40
9. LIGHTING DEVICES (CAB WORK
LIGHT, INTERIOR LIGHT) ………………….5-S43
10. REMOVAL AND INSTALLATION OF
GLASS……………………………………………..5-S46
11. FRONT WINDOW………………………………5-S49
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PLEASE NOTE:
- This is the same manual used by the dealers to diagnose and troubleshoot your vehicle
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