Hitachi ZX450 Class and ZX460LCH Zaxis Excavator Manual

The manual is applicable for the Hitachi Excavator Model:

• ZX450
• ZX450H
• ZX450LC
• ZX450LCH
• ZX460LCH

Format: PDF
Language: English
Service Manual consists of the following:

For Model ZX450, ZX450H, ZX450LC, ZX450LCH and ZX460LCH as mentioned above:

Service Manual (Troubleshooting) Vol. No. TO16JE : 348 Pages
Service Manual (Operation) Vol. No. TT16JE : 211 Pages
Workshop Manual Vol. No. W16JE : 631 Pages
Parts Catalog: 820 Pages

Circuit diagram: 15 Pages

SI Units (International System of Units) are used in those manual.

Manual guide composition

Hitachi ZX450, ZX450H, ZX450LC, ZX450LCH and ZX460LCH service manual consists of the Operating, Troubleshooting and the Workshop Manual.

• Information included in the Service Manual: Technical information needed for redelivery and delivery, operation and activation of all devices and systems, operational performance tests, and troubleshooting procedures.
• Information included in the Workshop Manual: Technical information needed for maintenance and repair of the machine, tools and devices needed for maintenance and repair, maintenance standards, and removal / installation and assemble / disassemble procedures.

To avoid injury and damage refer to the service manual and be sure to use appropriate lifting techniques and equipment when lifting heavy parts.

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RELATIONSHIP BETWEEN MACHINE TROUBLE SYMPTOMS AND RELATED PARTS EXTRACT:
Symptoms in machine operation when trouble occurs..

EC Motor

Even if engine control dial is turned, engine speed does not increase from slow idle speed.
• Engine start may be difficult though starter rotates. Engine will stall if discontinuity occurs in EC motor while engine is running at more than a specified speed.
• Engine will become uncontrollable if discontinuity occurs in EC motor while engine is running at lower than a specified speed. Engine cannot be stopped with key switch.

EC Sensor

Error in setting will seldom occur so that change in machine operation will not be noticed.
• In case error is set on lower side, engine speed changes but runs slower than normal through the full range when engine control dial is turned. (Note: In case error is set on upper side, EC motor is driven so that it runs faster than the control range. However, motor, a worm gear type, holds governor lever at maximum constant position, preventing engine stall. When engine control dial is turned to minimum speed position, governor lever is returned to idle position.) When starting engine, engine speed fluctuates.
• Starting engine is occasionally difficult.