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Solenoid valve selector switch
This joystick has two buttons to switch over between change of track width and operations of
bulldozing blade cylinder.
When pushed down, this joystick controls the telescoping of tracks.
When not pushed down, this joystick controls the lifting and lowering of bulldozing blade.
Auxiliary hydraulic pipeline
Disconnecting the pipelines before the pressure relief of hydraulic system may result in out-spray
of hydraulic oil.
After stopping the engine, immediately press all auxiliary hydraulic pedals and 2
nd
auxiliary
switch for several times to relieve the pressure in the auxiliary hydraulic circuit.
Slowly loosen the bleeding plug to relieve the internal pressure of hydraulic oil tank.
While disconnecting hoses, stand clear and loosen slowly. Slowly relieve the internal pressure
before disassembling.
These pipelines deliver the hydraulic oil required for the operations of hydraulic breaking
hammer, breaking hammer, and other working devices.
Connection of Hydraulic Circuits
To connect the attachment hydraulic pipeline, please operate as per following procedure:
Relieve the residual pressure from system and then close the shutoff valve. Refer to
Take out the connector.
Connect the attachment hydraulic pipes to ports (a/c) and (b/d). While installing a hydraulic
breaking hammer, connect the oil inlet port to port (a) and oil return port to port (b).
Open the shutoff valve. While installing a hydraulic breaking hammer,open the selector valve (1).
After connections, fully bleed the air from hydraulic pipes.
Start the engine and run at low idling speed under no-load condition for 10min.
During the running of engine at low idling speed, operate the hydraulic auxiliary switch
repeatedly (for approximately 10 times) to bleed the air from hydraulic pipes.
Stop the engine and wait for at least 5min, till the air bubbles overflow from the hydraulic oil in
the oil tank.
Disconnection of Hydraulic Circuits
Relieve the residual pressure from system and then close the shutoff valve
Disconnect the pipelines from ports (a/c) and (b/d).
Install the connector.
Relief of Residual Pressure
The auxiliary hydraulic circuit still contains residual pressure after use. It’s referred to as residual
pressure. Please relieve the residual pressure after disconnection of pipelines.
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