Komatsu PC220LC -8 Operation & Maintenance Manual page 196

OPERATION OPERATION
13. Check that the hydraulic oil temperature monitor and engine
coolant temperature monitor are displaying the correct
temperature, then check that all the gauges and caution
monitors on the machine monitor are in the following status.
Radiator coolant level monitor (8): OFF
Charge level monitor (9): OFF
Engine oil pressure monitor (10): ON
Engine oil level monitor (11): OFF
Air cleaner clogging monitor (12): OFF
Water separator monitor (13): OFF
Engine pre-heating monitor (14): OFF
Engine coolant temperature gauge (15): Indicator in green
range
Engine coolant temperature monitor (1): Displays correct
temperature
Hydraulic oil temperature gauge (16): Indicator in green
range
Hydraulic oil temperature monitor (7): Displays correct
temperature
Fuel gauge (17): Indicator in green range
Fuel level monitor (18): Displays appropriate level
14. Check for abnormal exhaust gas color, noise, or vibration. If
any problem is found, contact your Komatsu distributor.
In cold temperatures [ambient temperature below 0 °C (32 °F)], even when the hydraulic oil temperature monitor
displays the correct temperature, carry out additional Step 15 to warm up all the hydraulic equipment.
15. Turn fuel control dial (4) to the full speed (MAX) position, repeat
Steps 6 to 9 for 3 to 5 minutes, then check again that the
hydraulic oil temperature monitor is displaying the correct
temperature.
If it is not displaying the correct temperature, repeat Steps 6 to
9 for 3 to 5 minutes until hydraulic oil temperature monitor (7)
displays the correct temperature.
(A) Display when temperature is correct: Monitor background
(B) Display when temperature is low: Monitor background (C)
(C) is blue
is white
MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS
3 - 141