4.9 Service procedure
Every 2000 hours service Maintenance
4-78 WA470-6H – VEAM946100
9. Remove mounting bolts (8) of filter cover (7) at the top of the
tank, then remove the cover.
When the cover is removed, the force of spring (9) may
make the cover fly off, so keep the cover pushed down when
removing the bolts.
10. Remove spring (9) and bypass valve (10), then remove ele-
ment (11).
11. Check that there is no foreign material inside the tank, then
clean it.
12. Install new element (11), then set bypass valve (10), spring
(9), and cover (7) to the tank.
If the O-ring of the cover is damaged or deteriorated, replace
it.
13. Remove 6 bolts (13), then remove cover (12).
14. Pull the top of rod (14) from the top and remove strainer
(15).
15. Remove any dirt stuck to strainer (15), then wash it in flush-
ing oil. If strainer (15) is damaged, replace it with a new part.
16. When installing the cover bolts, push down the cover and
tighten the bolts evenly.
17. Add engine oil through oil filler port (F) to the specified level,
then install cap (F).
18. Check that the hydraulic oil is at the specified level.
For details, see "Check oil level in hydraulic tank, add oil
(4-56)".
19. Run the engine at low idling, and extend and retract the
steering, bucket, and lift arm cylinders 4 to 5 times. Be care-
ful not to operate the cylinder to the end of its stroke (stop
approx.100 mm before the end of stroke).
NOTE
If the engine is run immediately at high speed or the cylinder is
operated to the end of its stroke, the air inside the cylinder will
cause damage to the piston packing.
GK047054
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GK047055
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