Hitachi ZW 370-6 Operator's Manual page 336

6. Supply hydraulic oil through filling port (3) while
checking the oil level at level gauge (6).
Refer to "Hydraulic Oil" on page 7-15.
* Capacity of
hydraulic oil tank
178 liters
(47 gallons)
* At level gauge center (Tank capacity: 273 L (72 gal)
7. Install breather valve (2).
IMPORTANT: When changing hydraulic oil, take care not
to permit foreign matter such as dirt, water, and /or
sand to enter into the hydraulic oil tank.
Bleed Air from the Hydraulic System
8. After changing hydraulic oil or replacing the return
filter, pilot filter and/or suction filter, bleed air from the
hydraulic system following the procedures below.
8.1 After supplying oil, start the engine. Do not exceed
1000 RPM (min ). Move the bucket and lift arm
-1
cylinders several times to bleed air mixed in the
hydraulic circuit. Do not operate the cylinders to the
end of cylinder stroke, and do not apply a heavy load
to the cylinders.
8.2 Rest the bucket on the ground to resume the
hydraulic oil level check position.
8.3 Stop the engine. Check the oil level. Add oil as needed.
9. Stop the engine. Check for any oil leakage. Check the oil
level using level gauge (6).
MAINTENANCE
Total oil capacity in
the hydraulic system
295 liters
(78 gallons)
7-42
6
95Z7B-7-41-1