. MAINTENANCE SERVICE PROCEDURE MAINTENANCE SERVICE PROCEDURE HYDRAULIC TANK, ADD OIL 4 - 57 8. Remove mounting bolts (6) of filter cover (5) at the top of the he force of spring (7) may make he cover pushed down when s valve (8), then remove element n material inside the tank, then set bypass valve (8), spring (7), maged or deteriorated, replace it. lts, push down the cover and oil through oil filler port (F), then at the standard level. For details, HYDRAULIC TANK, ADD OIL tank, then remove the cover. When the cover is removed, t the cover fly off, so keep t removing the bolts. 9. Remove spring (7) and bypas (9). Check that there is no foreig clean it. Install new element (9), then 10. 11.
and cover (5) to the tank. If the O-ring of the cover is da 12. When installing the cover bo tighten the bolts evenly. 13. Add the refill amount of engine install the cap. 14. Check that the hydraulic oil is see "CHECK OIL LEVEL IN (PAGE 4-43)". 15. Run the engine at low idle, an d extend and retract the steering, bucket, and lift arm cylinders 4 to 5 times . Be careful not to operate the cylin der to the end of its stroke (stop approx. 100 mm (3.9 in) before the end of str oke). NOTICE If the engine is run at high speed imme diately after startup or a cylinder is pushed up to its stroke end , air taken inside t he cy linder may cause damage to the piston pack ing. 16.
Next, operate the steering, bu end of their stroke 3 to 4 times, bleed plug (10) to bleed the a bleeding the air, tighten plug ( 17. Run the engine at low idle wh Check that the hydraulic oil is see "CHECK OIL LEVEL IN (PAGE 4-43)". 18. Next, increase the engine spe ed and repeat the procedure in Step 16 to bleed the ai r. Continue this operation until no more air comes out fr om plug (10). operation, tighten plug (10). Nm (1.15 ± 0.15 kgm, 8.3 ± 1.1 lbft) 19. After completing the air bleed Tightening torque: 11.3 ± 1.5 Nm (1.15 ± 0.15 kgm, 8.3 ± 1.1 lbft) 20. Check that the hydraulic oil is a t the standard level. For details, see "CHECK OIL LEVE L IN HYDRAULIC T ANK, ADD OIL (PAGE 4-43)".
e of oil from the filter cover mount. 21. Check that there is no leakag e of oil from the filter cover mount