Komatsu PC500LC-10R Shop Manual page 452

BLEED AIR FROM FUEL SYSTEM
REMARK
• While "Operation of elec. fuel primer pump (Pump
stops automatically after specified time)" is shown,
electric fuel primer pump repeats the cycle of 30 sec-
onds operation and 10 seconds pauses for the specific
period (approximately 7 minutes).
• While "Operation of elec. fuel primer pump (Pump
stops automatically after specified time)" is shown, the
electric fuel primer pump stops operation, but it is not a
failure.
Method to stop the electric fuel primer pump
• Press the switch F5 on "Operation of elec. fuel primer
pump (Pump stops automatically after specified time)"
screen.
• Press the switch F6 on "Operate elec. fuel primer
pump?" screen.
REMARK
• After the specific period (approximately 7 minutes)
passed, the pump stopped. When "Finish operation of
elec. fuel primer pump" is shown, air bleeding is finish-
ed.
• Only the fuel filter was applicable for replacement, the
air bleeding is completed.
• When the fuel circuit is out of fuel in the cases as fuel
has run out or the fuel piping or supply pump is re-
placed, operate the electric fuel primer pump again af-
ter the fuel feed pump stops automatically.
6.
Start the engine.
REMARK
• The air in the high-pressure circuit is bled automatically by cranking the engine.
• If the engine does not start, air bleeding may not have been done correctly. In this case, start the engine
again according to the following procedure.
1)
Operate the electric fuel primer pump.
2)
Start the engine while the electric fuel primer pump is in operation.
Repeat the steps 1) and 2) when the engine does not start.
3)
After the engine starts, run it at low idle for approximately 5 minutes to bleed all air from the fuel circuit.
4)
After approximately 5 minutes passed, stop the engine again, and start the engine as it is usually done.
NOTICE
• Do not operate the starting motor continuously for 20 seconds or more.
• If it is not started, try starting again after approximately 2 minutes.
30-46
30 TESTING AND ADJUSTING
PC500LC-10R