OPERATION MACHINE OPERATIONS AND CONTROLS
3-195
Hydraulic Equipment Warm Up 3
q 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.
q 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.
q 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 back-
ground (C) is blue
(B) Display when temperature is low: Monitor back-
ground (C) is white)
q 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 oper-
ation just for one 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) dis-
plays the correct temperature.
(A) Display when temperature is correct: Monitor back-
ground (C) is blue
(B) Display when temperature is low: Monitor background
(C) is white
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 (3-
193)“.
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