METHOD FOR HYDRAULIC SYSTEM WARM-UP OPERATION
WARNING
• Before performing the warm-up operation for the hy-
draulic equipment, set the swing lock switch on, check
on the monitor that the swing lock is actuated, then
start the warm-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.
• Perform the warm-up operation for the hydraulic
equipment until the hydraulic oil temperature caution
lamp displays the proper temperature. (When the hy-
draulic oil temperature is low, the low temperature dis-
play shown in the figure is given.)
• Display (A) when temperature is proper: Caution
lamp background (C) is blue.
• Display (B) when temperature is low: Caution lamp
background (C) is white.)
• The warm-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 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 (boom, arm and buck-
et), swing, travel, and attachment (if equipped).
• Before operating the travel lever, check the direction
of the track frame.
1.
Check that engine coolant temperature caution lamp (1)
displays the proper temperature.
• Display (A) when temperature is proper: Caution lamp
background (C) is blue.
• Display (B) when temperature is low: Caution lamp
background (C) is white.
If it displays low temperature, perform additional warm up
of the engine until engine coolant temperature caution
lamp (1) displays the proper temperature. For detail, see
“METHOD FOR ENGINE WARM-UP OPERATION
(3-177)”.
2.
Set swing lock switch (2) to ON position and check that the
swing lock pilot lamp is lit.
MACHINE OPERATIONS AND CONTROLS OPERATION
3-180
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