Komatsu Galeo PC800-8 Shop Manual page 343

30 Testing and adjusting
2. Install fuel prefilter (1) to the filter head.
a Thinly apply engine oil to the packing surface
on the fuel prefilter.
a After the packing surface on the fuel prefilter
side touches the seal surface of the filter
head, tighten the fuel prefilter by 3/4 turns.
3. Remove air bleeding plug (3) of the main fuel fil-
ter and operate priming pump (4).
a Operate the priming pump until fuel flows out
of the plug hole. After fuel starts flowing out,
3 Air bleeding plug:
install plug (3).
7.8 – 9.8 Nm {0.8 – 1.0 kgm}
PC800, 850-8
4. Loosen air bleeding plug (5) of the main fuel fil-
ter and operate priming pump (4).
a Operate the priming pump until fuel flows out
of the plug hole. After fuel starts flowing out,
3 Air bleeding plug:
install plug (5).
7.8 – 9.8 Nm {0.8 – 1.0 kgm}
5. Loosen air bleeder (6) of the fuel supply pump
and operate priming pump (4) 90 – 100 times.
a Operate the priming pump until fuel flows out
of the bleeder. After fuel starts flowing out,
tighten the bleeder and operate the priming
3 Air bleeder:
pump several times until it becomes heavy.
4.9 – 6.9 Nm {0.5 – 0.7 kgm}
6. Start the engine with the starting motor.
a The air in the high-pressure circuit is bled au-
tomatically if the engine is rotated.
a If the engine does not start, there may be still
air in the low-pressure circuit. In this case,
repeat the above procedure from step 3.
SEN00786-02
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