Change Coolant - Hitachi ZW 310-6 Operator's Manual

Change Coolant

--- every 3000 hours or two years
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WARNING: Do not remove radiator cap (1) until the
coolant temperature in the radiator has cooled. Hot
steam and coolant may spout out, possibly causing
severe burns. After the coolant temperature cools,
slowly loosen the cap to release the inside pressure
before removing cap (1).
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NOTE: Refer to page 7-71 for coolant specification.
When other than Hitachi LLC is used, contact your nearest
authorized dealer for the replacement interval.
1. Park the machine following the same procedures as
described on page 7-7 for preparation of inspection/
maintenance work.
2. Install articulation stopper (lock bar) to the front
and rear of the chassis by following the procedures
described on page 7-9.
3. Loosen radiator drain plug (2) and drain coolant into
a suitable container (approx. 50 liters (13 gal)).
IMPORTANT: Do not open radiator cap (1) before
draining coolant to prevent overflowing coolant
due to the vertical interval between the sub tank
and the radiator.
4. Lift the pressure release lever (3) on sub tank cap (4)
to release any remaining pressure.
Slowly turn and remove sub tank cap (4).
5. Close drain plug (2).
Supply low impurity soft water or tap water into sub
tank (5) to the FULL level of sight gauge (6). When
adding coolant, do so slowly to avoid mixing air in
the system.
Check the water level after three minutes, and add if
necessary.
6. Start and idle the engine for 5 minutes with sub tank
cap (4) opened.
Stop the engine and wait until the engine has cooled.
Check the water level and add if necessary.
MAINTENANCE
3
7-80
4
5
2
90Z7B-7-78-2
1
90Z7B-7-78-1
6
90Z7B-7-76-1