Komatsu Galeo PC27MR-2 Operation & Maintence Manual page 215

MAINTENANCE PROCEDURE
Air Bleeding
1. Fill the fuel tank with fuel.
2. Set handle (1) of the water separator to OPEN position (B).
3. Loosen air bleed bolt (2) of the water separator 2 or 3 turns.
4. When no more bubbles come out with the fuel from air bleed
bolt (2), tighten air bleed bolt (2).
5. Turn the starting switch to the ON position, hold it there for 10
to 15 seconds, then return it to the OFF position.
Air bleeding is carried out automatically by the automatic air
bleed device.
REMARK
When the machine has run out of fuel, carry out the same
procedure, to bleed the air.
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MAINTENANCE