Description

Hitachi ZX70 Excavator Service Manual

The manual is applicable for the Hitachi ZX70 Excavator Model

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

For Model ZX70 as mentioned above:

Troubleshooting Manual – 322 Pages
Operation Manual – 192 Pages
Workshop Manual – 608 Pages
Circuit diagram – 6 Pages
Parts Catalog – 644 Pages

Table of Content of the Workshop Manual

SECTION 1 GENERAL
Group 1 Precautions for Disassembling
and Assembling
Group 2 Tightening Torque
Group 3 Painting
Group 4 Bleed Air from Hydraulic
Oil Tank
SECTION 2 UPPERSTRUCTURE
Group 1 Cab
Group 2 Counterweight
Group 3 Main Frame
Group 4 Pump Device
Group 5 Control Valve
Group 6 Swing Device
Group 7 Pilot Valve
Group 8 Pilot Shut-Off Valve
SECTION 3 UNDERCARRIAGE
Group 1 Swing Bearing
Group 2 Travel Device
Group 3 Center Joint
Group 4 Track Adjuster
Group 5 Front Idler
Group 6 Upper and Lower Roller
Group 7 Track
SECTION 4 FRONT ATTACHMENT
Group 1 Front Attachment
Group 2 Cylinder
Group 3 Holding Valve
SECTION 5 ENGINE

Hitachi ZAXIS ZX70 service manual consists of the 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.

SWING BEARING PLAY EXCAVATOR ZX70
Summary:
To check the wear on the swing bearing races and balls by measuring the swing bearing play between the outer race and the inner race.
Preparation:
1. Check swing bearing mounting bolts for looseness.
2. Check the lubrication of the swing bearing. Confirm that bearing rotation is smooth and without noise.
3. Install a dial gauge with a magnetic base on the upper side of track frame as shown.
4. Position the upperstructure so that the boom aligns with the tracks facing towards the front idlers.
5. Position the dial gauge so that its needle point comes into contact with the bottom face of the center of bearing outer race.
6. Bucket should be empty.