Komatsu PC30MR-5 Operation & Maintenance Manual page 355

ATTACHMENTS AND OPTIONS
2.
Turn the valve attached to the water manifold counter-
clockwise to open.
3.
Close the engine rear cover (1).
4.
Turn the heater switch to adjust the air flow rate.
If the heater is not used for a long time, turn the valve
clockwise to close it.
WENAM00150
HANDLE HEATER
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