Hitachi ZW 550-6 Operator's Manual page 311

6. Allow oil to drain through a clean cloth to check if
any foreign matters such as metal pieces are not in
the oil.
7. Install a new oil filter.
(Refer to the descriptions for 3 Replace Engine Oil
Filter.)
8. Securely tighten drain plug (3).
Tightening torque: 78.5 N·m (8.0 kgf·m, 58 lbf·ft)
9. Remove oil filler cap (2).
Supply the specified amount of approved engine oil.
Refer to "Kind of Oils" - "Engine Oil" on page 7-15.
57 liters (15 gallons)
IMPORTANT:
 When filling oil, take care not to allow foreign
matter to enter.
 Do not spill oil. Wipe off spilled oil, if any, as it
may cause fires.
10. Securely tighten oil filler cap (2).
11. Check that the oil level is between the maximum and
minimum level scales on oil level gauge (1).
12. Wait 5 minutes after refueling and, start the engine.
13. Keep the engine running at low idle speed for
5 minutes, check the sealing surfaces for any oil
leakage, and stop the engine.
14. About 20 minutes later, recheck the oil level. If
necessary, add oil.
MAINTENANCE
Clean cloth
7-27
Container
2
M4GB-07-020
1
95Z7B-7-25-1