Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual

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MAINTENANCE PROCEDURE
MAINTENANCE
4-46
2. Remove locknut (3) from priming pump lever (4), then
pump priming pump lever (4) 50 -100 times and check that
fuel comes out from air bleed plug (1). When fuel comes
out, tighten plug (1). (One place each on left and right
sides of engine)
Tightening torque: 7.8 - 9.8 Nm {0.8 - 1 kgm}
3. Open air breather (6) at the side of supply pump (5), then
pump priming pump lever (4) approx. 5-15 times. With this
operation, fuel will start to overflow from air breather (6).
When no more bubbles come out with the fuel, tighten air
breather (6). (One place each on left and right sides of
engine)
Tightening torque: 4.9 - 6.9 Nm {0.5 - 0.7 kgm}
4. Pump priming pump lever (4) again several times until it
becomes heavy. Then push in priming pump lever (4) and
tighten locknut (3) to hold priming pump lever (4) in posi-
tion.
5. If the air bleed operation does not go well, return to Step 3 and start again.
6. For normal starting, turn the key in the starting switch to the START position. The engine will start.
q
When starting the engine, do not run the starting motor for more than 20 seconds continuously.
q
If it is necessary to keep it continuously running, provide a more than 2 minute interval between trials.