45EXCAVATOR OPERATION
HOW TO RELEASE PRESSURE TRAPPED
IN THE HYDRAULIC SYSTEM
To avoid personal injury or death:
A Relieve residual hydraulic pressure
immediately after the engine has stopped.
1. Lower the attachments and the blade down to the
ground.
2. Turn the key to "STOP" position and shut off the
engine.
3. After stopping the engine, turn the key to "RUN"
position.
4. Set the pilot control lock lever to "UNLOCK" position.
5. Move the operating lever to release pressure in the
hydraulic system.
[How to release pressure trapped in the AUX port]
1. Perform the above operations of 1 to 4.
2. Turn "ON" the AUX port enable switch.
3. Make sure that the flow volume in all the AUX ports is
not minimized.
If the pressure is removed after minimizing the flow
volume in the AUX port, release pressure is not
removed completely and the hose coupler may be
unable to connect and disconnect.
(1) Pilot control lock lever
(2) Attachment control lever (left)
(A) "UNLOCK"
(B) "LOCKED"
(1) AUX port enable switch (Switch 3)
(1) Flow volume in
AUX port display
(A) Flow volume in AUX port
(B) Maximum
(C) Minimum
(B) Maximum status of flow volume in AUX port
(C) Minimum status of flow volume in AUX port
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