Sinoboom GTJZ0612E, Maintenance Manual

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© Jul.2020 5-4 GTJZ0612E&0812E&1012E&1212E Maintenance Manual
MAINTENANCE PROCEDURES
4. Remove the front wheel bracket.
Removing the Steering Cylinder
NOTICE
When installing the removed hose and fitting, it must
be tightened according to the specified torque. See
Hydraulic Hose and Fitting Specifications, page
1-9
.
Figure 5-6
1. Disconnect and plug the hoses and fittings on the
steering cylinder, and tag the machine.
2. Remove the cotter pin and clevis pin connecting the
steering cylinder and steering linkage.
3. Remove the bolts connecting the steering cylinder
to the chassis.
4. Remove the steering cylinder.
Removing the Battery
NOTICE
Be sure to disconnect the battery charger and main
power from the machine before removing the battery.
1. Open the left door.
2. Label and disconnect the wires connected to the
battery.
3. Use the appropriate lifting equipment to remove the
battery.
HYDRAULIC SYSTEM
Testing the Function Pump
NOTICE
When installing the removed hose and fitting, it must
be tightened according to the specified torque. See
Hydraulic Hose and Fitting Specifications, page
1-9
.
BURN AND HIGH-PRESSURE
HAZARDS
Allow the hydraulic components
to cool to room temperature be-
fore performing service. Loosen
the hydraulic hoses and fittings
slowly to relieve pressure.
1. Disconnect and plug the oil outlet hose from the hy-
draulic pump, and tag the machine.
2. Install a pressure gauge of 0 - 40 MPa (0 - 5800 psi)
at the oil outlet of the hydraulic pump.
3. Switch the key switch to the ground controller ， pull
the emergency stop button on the ground controller
and platform control box out to the “ON” position.
4. Push the lifting button from the ground controller.
Correct result: The reading of the pressure gauge is
24.8 MPa (3597 psi). The machine stops and the
pump function is normal.
Incorrect result: The pressure value is less than
24.8 MPa (3597 psi). Repair or replace the pump.
NOTICE
The pump is not equipped with an unloading
valve. If the pressure is over 24.8 MPa (3597 psi),
the pump may be damaged. So start the pump
within a very short time interval, and verify the
reading. Do not overload the pump.
5. Remove the pressure gauge.
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