Hitachi ZW 120-6 Operator's Manual page 251

5. Prepare a container of more than 20 L (5.3 US gal)
capacity to receive the drain oil.
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NOTE: Drain plug (5) is magnetized. If excessive amount of
metal pieces are found adhered to drain plug (5), consult your
nearest authorized dealer.
6. Remove drain plug (5) from the transmission bottom to
drain the oil. Dispose of the drain oil in the proper way.
7. Securely tighten drain plug (5).
Tightening torque: 50 N·m (5.0 kgf·m, 36.9 lbf·ft)
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NOTE: Do NOT apply sealant to drain plug (5).
8. Remove bolts (6) (4 used) from suction tube (8).
9. Remove strainer (7) and clean it. If straner (7) is damaged,
replace with a new one. Replace the gasket and the
O-ring with new ones.
10. Install strainer (7), O-ring and gasket. Tighten bolts (6) (4
used).
11. Refill the specified amount of oil through transmission
oil filler port (10).
Transmission oil: 8 L (2.1 US gal)
12. Start the engine and keep it running for two minutes.
13. Check that the oil level is within the specified range in oil
level gauge (9). If necessary, add oil.
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NOTE: Check for any oil leakage at the drain plug and the
strainer mounting area.
Install strainer (7) with care so that the O-ring is not damaged
due to twist.
MAINTENANCE
5
7-33
7
9 10
M4FJ-07-029
8
6
M4FJ-07-030
MNSC-07-011