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24. SERVICE PROCEDURE
8. Remove mounting bolts 5 of the 3 filter covers 4 at the top of
the tank, then remove the covers.
When doing this, the cover may fly off because of the force of
spring 6, so keep the cover pushed down while removing the
bolts.
9. Remove spring 6 and bypass valve 7, then remove element 8.
10. Check that there is no foreign matter inside the tank before
cleaning it.
11. Install a new element, then install bypass valve 7, spring 6, and
cover 4.
If the O-ring of the cover is damaged or deteriorated, replace it
with a new part.
12. When installing the cover bolts, push down the cover and tighten
the bolts evenly.
13. Add engine oil through oil filler port F to the specified level, then
install air bleed plug 1 on filter case. The cap of the hydraulic
tank remains removing, until the air bleeding of the piston pump
finishes.
For details of the oil to use, see “20. USE OF FUEL, COOLANT
AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE”.
14. Check that the hydraulic oil is at the standard level. For details,
see “24.5 EVERY 100 HOUR SERVICE”.
15. Loosen plug 9 on top of the tube at the suction side of the piston
pump. There is one plug for each pump, so loosen all plugs (3
places).
16. Continue until oil flows out from plug 9 (3 places). After the air
has been completely bled, tighten plug 9 (3 places). After that,
in order to fill the inside of the pump with the hydraulic oil, leave
it is for 10 minutes.
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