Komatsu PC290LC-11 Operation & Maintenance Manual page 250

MACHINE OPERATIONS AND CONTROLS
• Radiator coolant level caution lamp (8): OFF
• Charge level caution lamp (9): OFF
• Engine oil pressure caution lamp (10): OFF
• Engine oil level caution lamp (11): OFF
• Air cleaner clogging caution lamp (12): OFF
• Water separator caution lamp (13): OFF
• Engine preheating pilot lamp (14): OFF
• Engine coolant temperature gauge (15): Indicator in
green range
• Engine coolant temperature caution lamp (1): Displays
proper temperature
• Hydraulic oil temperature gauge (16): Indicator in
green range
• Hydraulic oil temperature caution lamp (7): Displays
proper temperature
• Fuel gauge (17): Indicator in green range
• Fuel level caution lamp (18): Displays appropriate lev-
el
11. Check for abnormal exhaust gas color, noise, or vibration.
If any problem is found, contact your Komatsu distributor.
NOTICE
In cold temperatures (ambient temperature below 0 °C), even when the hydraulic oil temperature caution
lamp displays the proper temperature, perform the "Hydraulic system warm-up operation in cold weath-
er" to warm up all the hydraulic equipment.
12. Hydraulic system warm-up operation in cold weather
1)
Turn fuel control dial (4) to High idle (MAX) position.
2)
Repeat the work equipment operation of step 6 for 3
to 5 minutes.
• Display (A) when temperature is proper: Caution
lamp background (C) is blue.
• Display (B) when temperature is low: Caution
lamp background (C) is white.
3)
Check that the hydraulic oil temperature caution lamp displays proper temperature.
If it is not displaying the proper temperature, repeat
step 2) until hydraulic oil temperature caution lamp (7)
displays the proper temperature.
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OPERATION