Hitachi ZW 370-6 Operator's Manual page 329

Check Planetary Gear Oil Level
f
NOTE: Check the oil level on all four wheels.
6. Clean the vicinity of oil level plug (4).
7. Check that "TOP" mark (3) on the planetary gear
housing comes top as shown. If not, move the machine
and adjust the position.
8. Make sure to turn ON the parking brake switch, lower
the attachment to the ground, and stop the engine.
9. Remove oil level plug (4) on the housing.
10. If the oil level is lower than the plug, add the specified
oil through the level plug hole.
11. Magnetic plugs are used for the planetary gear housing.
Wipe off the small amount of fine metallic powder that
normally sticks to the plugs. If abnormal debris is found,
determine the cause and correct it.
12. If there is any sign of water in the oil, drain and replace
the oil. Oil containing water looks milky.
Dispose of the drained oil properly.
13. Install and tighten the level plug.
MAINTENANCE
4
7-35
3
95Z-7-33-2