Hitachi Hydraulic Excavator UH103 Service Manual – PDF DOWNLOAD

Description

Hitachi Hydraulic Excavator UH103 Service Manual – PDF DOWNLOAD

FILE DETAILS:

Hitachi Hydraulic Excavator UH103 Serviceman Manual – PDF DOWNLOAD

Language : English
Pages :451
Downloadable : Yes
File Type : PDF
Size:25.5 MB

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION

Hitachi Hydraulic Excavator UH103 Service Manual – PDF DOWNLOAD

FOREWORD

• This service manual explains the correct maintenance and repair procedures to ensure optimal performance and maximum service life ,for Hitachi construction machinery.
• The serviceman is requested to read the manual thoroughly and consult it whenever he is not sure of correct servicing. Use the manual not only as a reference guide to maintenance but also a text book to train new servicemen who are lillfamiliar with Hitachi construction machinery.
• The manual is divided into four sections such as SPECIFICATIONS, OPERATIONAL PRINCIPLE, DISASSEMBLY and ASSEMBLY and t’-1AINTENANCE STANDARD.

A thorough knowledge of these will help to:

1. Diagnose the cause of the failure.
2. Determine reuse or replacement of parts.
3. Install the units and assemble the parts correctly. We hope that this manual v,:ill aid in quick, easy and lower cost servicing of the machines.

TABLE OF CONTENTS:

Hitachi Hydraulic Excavator UH103 Service Manual – PDF DOWNLOAD

UH103 SERVICE MANUAL 0
FOWORD 1
CARE OF THE HANDLING 2
SECTION 01 SPECIFICATIONS 3
Group 01 Specifications 6
Engine 6
Main Pump 10
Gear Pump 11
Cntrol Valve (Left) 11
Cntrol Valve (Right) 11
Swing Motor 11
Swing Reduction Device 12
Travel Motor 12
Travel Reduction Device 12
Pilot Valve 12
Switch Valve 13
Slow Return Valve (For Arm Cyl) 13
Make-Up Valve (for Arm Cyl Bottm Side and Bucket Cyl Bottom Side) 13
Arm Cylinder 13
Bucket Cylinder 13
Boom Cylinder 13
Make-Up Valve (for Arm Cyl Rod Cyl) 13
Center Joint 13
Pilot Relief Valve 13
Full-Flow Filter 13
Suction Filter 14
Oil Cooler 14
Hydraulic Tank 14
Safty Valve (on Hydraulic Tank) 14
Air Governor 14
Air Tank 14
Safety Valve (on Air Tank) 14
Air Regulator 14
Solenoid Valve 14
Air Check Valve 14
Air Horn 14
Assist Valve 14
Cooler Relief Valve 14
Relief Valve (in Full Flow Filter) 14
Reference 15
Group 02 Conversion Table 16
SECTION 02 OPERATIONAL PRINCIPLE 23
Group 01 General 25
General 25
Delivery Pressure Control 26
Pump Displacement Control 28
Oil Flow Cut-Off System 30
Control Valve Link Machanism 31
Boom Operation 31
Arm Operation 34
Left Control Lever Lock Mechanism 35
Hydraulic Circuit 37
Main Hydraulic Circuit 37
Pilot Circuit 39
Drain Circuit 41
Swing Control Circuit 43
Arm Control Circuit 46
Boom Control Circuit 56
Bucket Control Circuit 60
Travel Control Circuit 64
Simultaneos Operations 70
Outline 70
Cam Interlock 72
Pilot Valve and Switch Valve 73
Right Control Valve 75
Left Control Valve 77
Swing and Travel Operations 79
Arm and Travel Operations 82
Boom and Travel Operations 83
Bucket and Travel Operations 86
Swing and Arm Operations 87
Swing, Boom, Arm and Bucket Operations 90
Hydraulic Circuit Diagram 91
Group 02 Air Circuit 92
Group 03 Main Pump (HPV125B-RM75B, RM14A)100
Group 04 Pilot Pump (IP Gear Pump)118
Group 05 Control Valve (KVM Control Valve)122
Group 06 Assist Valve138
Group 07 Swing Motor (MX Motor)143
Group 08 Travel Motor (HMT125BC Motor) 151
Group 09 Travel Reduction Device162
Group 10 Monitor166
Group 11 Monitor Troubleshooting182
SECTION 03 DISASSEMBLY AND ASSEMBLY208
Group 01 How To Disassembly / Assembly hydraulic Equipment209
Group 02 Main Pump (HPV B Type Pump)222
Group 03 RM14A, RM75B Regulator252
Group 04 Pilot Pump (IP Gear Pump)261
Group 05 Control Valve (KVM Control Valve)265
Group 06 Swing Motor (MX Motor)291
Group 07 Cylinder312
Group 08 Travel Motor (HMT125BC Motor)339
Group 09 Travel Reduction Device364
Group 10 Center Joint388
Group 11 Front Idler394
Group 12 Upper Roller399
Group 13 Lower Roller 403
SECTION 04 MAINTENANCE STANDARD407

Contact us: [email protected]

PLEASE NOTE:

• This is the SAME manual used by the dealers to troubleshoot any faults in your vehicle. This can be yours in 2 minutes after the payment is made.
• Contact us at [email protected] should you have any queries before your purchase or that you need any other service / repair / parts operators manual.

S.M