Komatsu WA800-3E0, Руководство по эксплуатации и техническому обслуживанию

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MAINTENANCE
SERVICE PROCEDURE
4-71
18. Loosen plug (9) installed above the tube on the suction
side of the piston pump, and also loosen plug (10) installed
on the elbow in the upper part of the piston pump.
There is a plug on each pump, so loosen all 6 plugs.
19. Tighten plug (9) and (10) after air is so completely bled that
oil begins to run out of both plugs.
20. Check the oil level. If the oil level is low, add oil to the spec-
ified level. For details, see “CHECK OIL LEVEL IN
HYDRAULIC TANK, ADD OIL (4-47)“.
21. Fix the cap of the hydraulic tank filler port (F).
22. Run the engine at low idle, and extend and retract the steering, bucket, and lift arm cylinders 4 to 5 times. Be
careful not to operate the cylinder to the end of its stroke (stop approx. 100 mm before the end of stroke).
NOTICE
If the engine is run at high speed immediately after startup or a cylinder is pushed up to its stroke end, air
taken inside the cylinder may cause damage to the piston packing.
23. Next, operate the steering, bucket, and lift arm cylinders to
the end of their stroke 3 to 4 times, then stop the engine
and loosen vent plug (1) to bleed the air from the hydraulic
tank. After bleeding the air, tighten plug (1) again.
24. Check the hydraulic oil level and add oil to the specified
level. For details,see “CHECK OIL LEVEL IN HYDRAULIC
TANK, ADD OIL (4-47)“.
25. Next, increase the engine speed and repeat the procedure
in Step 21 to bleed the air. Continue this operation until no
more air comes out from plug (1).
26. After completely bleeding the air, tighten plug (1).
Tightening torque: 9.83 to 12.77 Nm (1.0 to 1.3 kgm)
27. Lower the bucket horizontally to the ground and stop the engine.
28. Check that the hydraulic oil is at the standard level. For details, see “CHECK OIL LEVEL IN HYDRAULIC
TANK, ADD OIL (4-47)“.
29. Check that there is no leakage of oil from the filter cover mount.