Isuzu AU-4LE1T, Руководство по обслуживанию

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2) Check the belts. Replace them if any damage is found.
CAUTION: Replace all belts as a set even when one is not usable.
Single belt of similar size must not be used as a substitute for
a matched belt set. Otherwise, premature belt wear would
result because of uneven belt length.
(3) Coolant Level Check
1) Without the reserve tank
Remove the radiator filler cap, and check the coolant level as well as
the degrees of fouling.
Proper coolant level is about 10 mm higher from the radiator core top.
2) With the reserve tank
The coolant level must be between "FULL" and "LOW" marks on the
reserve tank.
Check and see that the level is correct.
When the coolant level is lower than the "LOW" mark, replenish the
reserve tank by the filler port, but when the reserve tank is empty,
replenish by the radiator filler port.
WARNING:
When removing the radiator filler cap while the engine is still
hot, cover the cap with clothing, then turn it slowly to gradually
release the internal steam pressure. This will prevent you
from getting burnt with hot steam spouted out from the filler
port.
CAUTION:
Use Isuzu genuine anti-freeze (ethylene-glycol based) or
equivalent with the specified mixing ratio.