Hydraulic Equipment Warm Up - Komatsu PC450-8 Operation & Maintenance Manual

OPERATION
1) Turn fuel control dial (2) to the full speed (MAX) position
and hold it for 3 seconds.
2) When fuel control dial (2) is returned to the low idle (MIN)
position, the engine speed will drop.

Hydraulic Equipment Warm Up

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).
WARNING
MACHINE OPERATIONS AND CONTROLS
3
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