Hitachi ZW 550-6 Operator's Manual page 317

13. Prepare a container of about 4 L (1 gal) capacity
under oil filter (11).
14. Remove the drain plug on the bottom of the filter
case with a 24 mm (0.94 in) wrench.
15. Using a 46 mm (1.8 in) wrench, remove the filter case.
16. Replace the element, and seals with new ones.
Properly dispose of the oil and filter.
17. Clean the filter case with solvent.
18. Clean the filter head gasket surface.
19. After coating the new filter gasket surface with new
oil, reinstall the filter on the filter head.
m : 98±9.8 N·m (10±1 kgf·m) (72.3±7.2 lbf·ft)
20. Clean and install the oil drain plug.
m : 59±5 N·m (6±0.5 kgf·m) (43.4±3.6 lbf·ft)
21. Refill the specified amount of oil through
transmission oil filler port (12).
90 liters (24 gallons)
22. Start the engine and keep it running for two minutes.
23. Check that the oil level is within the specified range
in oil level gauge (13). Refill as necessary.
f
NOTE:
 Never reuse element (11).
 Check for any oil leakage at the drain plug and the filter
mounting area.
MAINTENANCE
11
7-33
12
13
115Z7B-1-142-2
115Z7B-7-29-1