
Hitachi UH121 Excavator Service Manual PDF
[]Service manual contains detailed service and repair information, special instructions for repair and maintenance, schematics and diagrams, troubleshoot and other additional information for Hitachi excavator UH121.
This manual comes in PDF format, includes 194+354 pages, all pages are printable and readable. We recommend to use Adobe PDF Reader, to be sure all images / graphics will display correctly.
CONTENTS:
UH121 SPECIFICATIONS
UH121 OPERATIONAL PRINCIPLE
GENERAL (Machine Serial No. - 1129)
GENERAL (Machine Serial No. 1129 -)
ASSIST VALVE
BRAKE VALVE
CYLINDER
FULL-FLOW FILTER
HM MOTER
HPV125 AXIAL PISTON PUMP
IP GEAR PUMP
MPV25 CONTROL VALVE
KVC PLUNGER PUMP
PREFERENCE VALVE
REGULATOR
RM75A REGULATOR
SLOW RETURN VALVE
SX MOTOR
SWING REDUCTION DEVICE
UH121 DISASSEMBLY AND ASSEMBLY
BRAKE VALVE
CYLINDER
HM MOTOR
HPV125 AXIAL PISTON PUMP (Serial No. 1129-)
IP GEAR PUMP
MVP CONTROL VALVE
KVC PLUNGER PUMP (Serial No. 001-1128)
TRAVEL DEVICE
REGULATOR (Serial No. 001-1128)
RM75A REGULATOR (Serial No. 1129-)
SX MOTOR
SWING REDUCTION DEVICE
HOW TO DISASSEMBLE/ASSEMBLE HYDRAULIC EQUIPMENT
CONVERSION TABLE
UH121 MAINTENANCE STANDARD
STANDARD
CYLINDER
HM MOTOR
SX MOTOR
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