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OPERATION
Hydraulic Equipment Warm Up
Before carrying out the warming-up operation for the hydraulic
equipment, turn the swing lock switch ON, check on the monitor that the
swing lock is actuated, then start the warming-up operation.
When warming up the hydraulic equipment, check that there is no
person or obstacle in the surrounding area, then sound the horn and
start the operation.
Carry out the warming-up operation for the hydraulic equipment until
the hydraulic oil temperature monitor displays the correct temperature.
(When the hydraulic oil temperature is low, the low temperature display
shown in the diagram on the right is given.
(A) Display when temperature is correct: Monitor background (C) is blue
(B) Display when temperature is low: Monitor background (C) is white)
The warming-up operation for the hydraulic equipment is necessary not
only for the circuit between the pump and cylinders and between the
pump and motor, but also for the control circuits. Do not carry out the
operation just for 1 cylinder or motor, or the operation just in one
direction. Carry out the operation in all directions for all the work
equipment (boom, arm, bucket), swing, travel, and attachment (if
equipped).
1. Check that engine coolant temperature monitor (1) displays
the correct temperature.
(A) Display when temperature is correct: Monitor background
(B) Display when temperature is low: Monitor background (C)
If it displays low temperature, carry out additional warm up of
the engine until engine coolant temperature monitor (1)
displays the correct temperature.
For details of the procedure, see "Engine Warm Up (PAGE
3-137)".
WARNING
(C) is blue
is white
MACHINE OPERATIONS AND CONTROLS
3 - 139
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