MAINTENANCE
7-80
Change Coolant
--- every 2000 hours or two years
d
CAUTION: Do not remove the expansion tank cap (1)
until the coolant temperature in the radiator is cool.
Hot steam may spout out, possibly causing severe
burns. After the coolant temperature cools, slowly
loosen cap (1) to release the inside air pressure before
removing cap (2).
IMPORTANT: Use Hitachi genuine coolant. Change the
coolant every two years or 2000 hours whichever
comes first.
1. Park the machine following the same procedures as
described on page 7-8 for preparation of inspection/
maintenance work.
2. Install articulation lock bar to the front and rear of the
frame by following the procedures described on page
7-10.
3. Remove expansion tank cap (1). Open radiator drain cock
(2) and drain the coolant.
4. Close radiator drain cock (2). Supply low impurity soft
water or tap water together with the specified LLC up
to the radiator filler port. When adding coolant, do so
slowly to avoid mixing in the system.
Start the engine and sufficiently bleed air from the
cooling system.
f
NOTE: When refilling a long-life coolant, pour it at flow rate
14 L/min (3.7 gpm) or below. If flow rate is larger than the
above, air does not bleed, being unable to fill the specified
amount.
5. After adding coolant, operate the engine for several
minutes. Check the coolant level again and add coolant
if necessary.
2
MNEK-07-013
MNEK-07-012
1
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