Komatsu PW98MR-10 Operation & Maintenance Manual page 227

OPERATION
If any problem is found, contact your Komatsu distributor.
13. Hydraulic system warm-up operation in cold weather
NOTICE
In cold temperatures (ambient temperature below 0°C (32°F)), even when the hydraulic oil tempera-
ture caution lamp displays the proper temperature, perform the "warm-up operation for hydraulic
equipment in cold temperatures" to warm up all the hydraulic equipment.
1)
Turn fuel control dial (3) to the High idle (MAX) posi-
tion.
2)
Repeat the work equipment operation of step 6 for 3
to 5 minutes.
3)
Deactivate the camera and check that the indicator
light (6) of the hydraulic oil temperature (6) indicates
the correct value.
• 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 hydraulic oil temperature caution lamp (6) is display-
ing low temperature, repeat step 2) until the monitor displays the proper temperature.
14. Before starting the work, check that fuel control dial (3) is
at a point of 2/3 between Low idle (MIN) and High idle
(MAX).
If it is not at the 2/3 point, set it to the 2/3 point and run the
engine at 2/3 speed between MIN and MAX before operat-
ing.
15. Before starting actual operations, repeat the following operations slowly 3 to 5 times to circulate warm oil
through the all control circuits.
Arm control
To operate the arm, move the left joystick backwards or
forwards.
MACHINE OPERATIONS AND CONTROLS
WENAM00061
RKA48670
3-159