Routine Maintenance
Hydraulic System
148 148
9811/5700-7
Releasing the Hydraulic Pressure
Important: This procedure is only to be used before
disconnecting the hydraulic hoses. Before removing any
other hydraulic component refer to the relevant removal
procedure.
1 Make the machine safe with the mast lowered. Refer
to Prepare the Machine for Maintenance.
2 Operate the controls to remove the hydraulic
pressure from the service hose lines.
a For manually operated services, operate the
controls of the service to be disconnected.
b For electrical and servo operated services, turn
the starter key to the ON position.
Operate the controls of the service to be
disconnected.
Important: To release the hydraulic pressure from the
electrical and servo operated services the battery must be
connected while you operate the controls.
3 Clean the top of the tank around the filler cap B. Refer
to Checking the Hydraulic Fluid Level.
!MCAUTION
Allow the hydraulic fluid temperature to cool before
removing the hydraulic tank filler cap. Open the cap
slowly to prevent oil being forced out of the filler neck.
5-3-4-8
!MCAUTION
Do not run the engine with the hydraulic tank filler cap
removed.
5-3-4-1
4 Slowly remove filler cap B to allow the system to vent
fully and prevent oil being forced out of the filler neck.
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