Komatsu PC800-8 Operation & Maintenance Manual page 280

Hydraulic excavator
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MAINTENANCE PROCEDURE
10. Loosen air bleed plug (C) at the fuel main filter head (3).
11. Loosen wing nut (6) holding lever (5) of priming pump (4).
12. Push in lever (5) repeatedly.
Check that bubbles come out with the fuel from air bleed
plug (C).
13. Tighten air bleed plug (C).
Tightening torque: 4.9 to 6.9 N·m (0.5 to 0.7 kgf·m)
14. Tighten wing nut (6) securely to lock lever (5) in position.
Target tightening torque: 11.8 N·m (1.2 kgf·m)
15. After replacing the filter cartridge, start the engine and run it at low idling for 10 minutes.
Check for leakage of oil from the filter seal surface. If any oil is leaking, check the tightening of the filter car-
tridge. If there is still oil leakage, repeat Steps 1 - 4 to remove the filter cartridge, and if any damage or embed-
ded foreign material in the packing surface is found, replace it with a new cartridge and repeat Steps 5 - 15 to
install it.
4-60
MAINTENANCE

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Pc800lc-8

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