Kubota XN12-8 Operation Manual page 142

Maintenance
Every 2000h
9. Loosen the bolt, remove the suction filter
element (2), and clean it.
10. Clean the inside of the hydraulic oil tank.
11. Replace the bleed plug (7) (if equipped).
12. Install the suction filter element (2) on the
flange (1).
13. Install the flange (1) back to its original
position.
14. Tighten the oil drain plug (3).
15. Remove the rubber plug (6).
16. Fill the rubber tube (5) with hydraulic oil to
the center of the round oil mark.
17. Install the hose back to the original position
of the flange (1) and tighten it.
18. Pressurized hydraulic oil tank. (If not
equipped with a breather, please refer to
"Pressurized Hydraulic Oil Tank" on page 5-18)
19. Install the rubber plug (6), and then install
the bleed plug (7).
20. Exhaust the air from the hydraulic oil circuit
as described in the "Exhaust" section below.
21. Adjust the machine to the hydraulic oil level
check posture, and check the oil level after the
oil temperature drops.
(For details, please refer to "Checking and
Replenishing the Oil Level of the Hydraulic Oil
Tank" on page 5-17)
Air Exhausting
Important: After the replacement of hydraulic
oil, bleed the air from hydraulic pipelines and
hydraulic devices. Otherwise, the hydraulic
devices will probably be damaged.
Cylinders
1. Start the engine and run at low idling
speed for 10min.
2. Keep the engine running at low idling
speed, extend and retract all cylinders for
4~5 times, but take caution not to
telescope any cylinder to the end.
3. Run the engine at high speed, extend and
retract all cylinders for 4~5 times, but take
caution not to telescope any cylinder to the
end.
4. Restore the engine to low idling speed,
extend and retract all cylinders for 4~5
times, and always telescope to the end.
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