Zoomlion ZT20J, Service And Maintenance Manual

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5- 16
b. Inspect the inner ring of the bearing for scratches, distortion, wear or other damage and replace the
bearing if necessary.
c. Inspect all threaded parts for damage such as stretching, thread deformation or distortion and replace
if necessary.
Refer to the Pin and Bearing Inspection Instructions in the Section 3 for pin and bearing inspection.
5.2.6.3 Installation
a. Follow the reverse steps of disassembly. The interface of the hydraulic pipe joint and balance valve
before installation should be cleaned to prevent contaminants from entering the hydraulic system.
b. A hydraulic system pipe joint equipped with a sealing device needs to replace a sealing device before
the hydraulic line is connected.
c. Threaded fasteners should be tightened in place according to the torque values in Section 2
Specifications.
5.2.7 Wire rope pulley disassembly
When replacing the wire rope, the pulleys need to be replaced simultaneously.
5.2.7.1 Disassembly
Figure 5-17 Removal of the extending boom wire rope
a. To remove the telescopic oil cylinder, please refer to the telescopic oil cylinder removal steps.
b. Remove the bolt 1 and remove the side slider.
c. Remove the bolt 2 and take down the wheel cover.
d. Use appropriate tools to disassemble pin 2 and disconnect the extending boom wire rope from the
wire rope fracture inspection sensor assembly.
e. Remove the extending boom wire rope from the telescopic oil cylinder.
f. Remove the bolt 3, use a suitable tool to remove the pin 1, and remove the extending boom pulley.
Bolt 2
Bolt 1
Bolt 3
Pin 1
Pin 2
Pulley
Side
Telescopic cylinder Boom pully