MAINTENANCE
GTTZ10EJ Maintenance Manual 5-35 © Mar. 2022
Power Unit
Figure 5-41 Power unit
Table 5-14
No Name Function Remarks
1 Motor
To send pressure oil to each functional valve
block
DC24V/4Kw/220A/2700–6000RPM
2
Check
valve
To keep the fluid flowing in one direction
/
3
Hand
pump
To manually control main boom lifting, turntable
slewing and steering wheel steering
6cc/stroke
4
Relief
valve
To control system pressure
15MPa
5 Filter
To filter hydraulic oil
/
6
Solenoid
valve
To control the direction of steering wheel
/
7
Solenoid
valve
To control the direction of turntable slewing
/
8
Solenoid
valve
To control the lifting direction of main boom and
jib boom
/
Hand Pump
1. Preparation