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SECTION 8
MAINTENANCE
Page 24
SERVICING
THE RESERVOIR
FILTERS
HYDRAULIC
SYSTEM
15. Put the reservoir cover in place and secure it with nuts.
1. Drain the hydraulic system. Refer to "DRAINING THE
SYSTEM."
2.
Loosen the nuts securing the reservoir cover in place.
NOTE: Before removing any components from the reser-
voir for servicing, wipe the top surface of the reservoir,
using clean kerosene or a commercial cleaning solvent.
3.
Removethe reservoir cover and sealing
"0"
ring.
4. Loosen and remove the nuts securingthe filter cover plate.
5.
Removethe cover plate.
6.
Removethe filter elements.
NOTE: Open and inspect the filter elements for warning
signs, such as metallic and packing deposits, which would
indicate problems in other components.
7.
Check the outlet screen in the bottom of the reservoir for
trapped particles. If any are found, remove the screen,wash
it in solvent, dry it with compressedair, and install it back in
place.
8.
Checkthe rubber sealsin both of the by-passvalves.Be sure
they are in place properly and are pliable.
9. Clean the reservoir relief valves. Refer to "SERVICING
THE RELIEF VALVES."
10.
Install new filter elements in the reservoir. Be sure they
are seated properly over the spacersin the bottom of the
reservoir.
11. Place the filter cover plate over the filter elements. Be
sure the cover plate is properly in place with the flanges on
the underside down inside of the elements.
12. Secure the cover plate with the nuts previously removed.
13. Inspect the sealing "0"
ring and replace it if damaged.
14. Install the sealing "0"
ring in place on the reservoir.
16. Fill the reservoir with fresh oil. Refer to "FI LLiNG THE
SYSTEM."
FILLING THE SYSTEM
NOTE: Always use clean oil from a clean container.
Correct all leaks.
1. Be sure the reservoir drain valve is closed and the drain
plugs are in place.
2. Remove the reservoir filler cap. Fill the reservoir with
fresh oil up to the "H" mark on the dipstick. Refer to
"LUBRICANT
SPECIFICATIONS AND CAPACITIES" in
Section 7 for the quantity and grade of oil specified.
3.
Reinstall and tighten the filler cap.
4. Start the engine and run at medium idle.
5. Slowly operate the booms, bucket and steering controls
severaltimes so all cylinders become filled with oil and air is
expelled.
6. Lower the booms to the ground and shut the enginedown.
7.
Removethe filler cap slowly to relievethe pressure build-up.
8. Add oil to bring the level up to the "H" mark on the dip-
stick.
9. Reinstall and tighten the cap.
SERVICING THE RELIEF VALVES
(lilust. 32)
1. Stop the engine.
•
CAUTION: ALWAYS LOOSENTHE FI LLER
CAP SLOWLY IN CASE THERE IS STILL
SOME PRESSUREIN THE SYSTEM.
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