Zoomlion RT60 Maintenance And Service Manual

Edition 2 Chapter 2 Page 2-7
Feb/2013 Troubleshooting
2.6 HOIST MECHANISM
Table 2-6
Part Problem Cause Remedy
Electrical System
Hook cannot go up
a) Relief valve pressure for
the main valve is set too
low.
b) Hydraulic motor defective
c) Main valve defective
d) Electrical system defective
e) Winch reducer does not
turn
Set the pressure to 27
MPa.
Replace
Repair
Repair
Examine the pilot
valve and the brake
valve
Hook cannot go down
a) Relief valve pressure for
the main valve is set too
low
b) Hydraulic motor defective
c) Main valve defective
d) Electrical system defective
e) Balance valve defective
f) Winch reducer does not
turn
Adjust or repair
Repair
Repair
Repair
Replace
Repair
Brake defective
a) Brake cannot engage or
disengage (Pilot oil source
pressure for the main valve
is set too low).
b) Brake pad is seriously
worn.
c) Air in the brake system
d) Hydraulic motor defective
(pump volume is too low,
not enough oil flow to do
multiple tasks).
Set the pressure to 3
MPa
Replace
Bleed the system
Repair or replace

Zoomlion RT60 Specifications

General

Brand	Zoomlion
Model	RT60
Category	Construction Equipment
Language	English