Change Coolant - Hitachi ZW 370-6 Operator's Manual

Change Coolant

--- every 3000 hours or two years
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WARNING: Do not remove the 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 the recommended LLC is used, contact your
nearest authorized dealer for the replacement interval.
1. Park the machine following the procedures described
on page 7-6 for preparation of inspection/maintenance
work. Apply the articulation lock securely.
2. Prepare a container to capture approx. 75 liters (20
gallons) of drained coolant.
Recycle or properly dispose of the used coolant.
3. Remove radiator cap (1).
Open radiator drain valve (2) and engine oil cooler drain
valve (3) to completely drain the coolant.
Remove impurities such as scale at the same time. Use a
diesel engine coolant system flush kit for this.
4. Close radiator drain valve (2) and engine oil cooler drain
valve (3).
MAINTENANCE
7-75
1
95Z7B-7-71-1
2
95Z7B-7-74-2
3
95Z7-7-69-3