Hitachi ZW180 Operator's Manual page 235

9. Securely tighten drain plug (5).
10. Using a filter wrench, turn cartridge filter (6) counter-
clockwise to remove it.
11. Clean the filter-seating surface. After coating the new car-
tridge filter gasket surface with new oil, lightly turn the
cartridge filter clockwise by hand until the cartridge filter
sealing surface comes in contact with the filter-seating
surface.
12. At this time, further tighten the cartridge filter 3/4 turns
using a filter wrench. Take care not to excessively tighten
the cartridge filter. The cartridge filter may become de-
formed if excessively tightened.
13. Clean transmission strainer (7) on the ZW310.
• Remove the suction tube mounting bolts (4 used).
• Take out strainer (7). Remove dirt and foreign matters
from the strainer. Clean the strainer with cleaning oil. In
case the strainer is broken, replace the strainer with a
new one together with the gasket and O-ring.
• Install the strainer, O-ring, and gasket. Tighten the suc-
tion tube mounting bolts.
14. Refill the specified amount of oil through transmission oil
filler port (8).
ZW180: 30 liters
ZW220, ZW250: 36 liters
ZW310: 36 liters
15. Start the engine and keep it running for two minutes.
16. Check that the oil level is within the specified range in oil
level gauge (6). Refill as necessary.
NOTE: Never reuse a cartridge type element. Install the car-
tridge with care so that the O-ring is not damaged due
to twisting. Check for any oil leakage at the drain plug
and the filter mounting area.
MAINTENANCE
7-35
6
ZW180, ZW220, ZW250
ZW310
ZW310
8
M4GB-07-032
6
M4GB-07-033
Suction
tube
Mounting
bolt
7
M4GB-07-034
M4GB-07-026