Komatsu D375A-8, Operation & Maintenance Manual

Page: 225 / 466

METHOD FOR HYDRAULIC SYSTEM WARM-UP OPERATION
k k
WARNING
• Before warming up the hydraulic component, check
that there is no person or obstacle in the area around
the machine, then sound the horn and start the opera-
tion.
• Perform the warm-up operation for the hydraulic com-
ponent until the hydraulic oil temperature gauge indi-
cates the correct temperature range between (A) and
(C).
• The warm-up operation for the hydraulic component 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 perform the opera-
tion just for one cylinder or motor, or the operation
just in one direction. Perform the operation in all direc-
tions for all the work equipment (blade and ripper) and
travel.
1.
Check that the engine coolant temperature gauge indi-
cates the correct temperature range between (A) and (C).
If it indicates the low temperature range between (C) and
(D), perform additional warm-up operation until the engine
coolant temperature gauge indicates the correct tempera-
ture.
2.
Set the work equipment lock lever (1) to FREE position
(F).
3.
Turn the fuel control dial (2) to a position midway between
Low idle (MIN) and High idle (MAX).
4.
Operate the blade control lever (3) to raise the blade to the
maximum. Under this condition, continue the blade RAISE
relief intermittently for 10 minutes.
OPERATION MACHINE OPERATIONS AND CONTROLS
3-167