Hitachi ZW180 Operator's Manual page 272

5. Stop the engine. Open radiator drain cock (2). Fill low
impurity soft water or tap water. Supply water until clean
water is drained to remove rust and scale.
6. 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 suf-
ficiently bleed air from the cooling system.
7. After adding coolant, operate the engine for several min-
utes. Check the coolant level again and add coolant if
necessary.
MAINTENANCE
7-72
2
M4GB-07-086
ZW310