Specifications

Engine Cooling System Preventive Maintenance
– 176 – Y53-6008A
Medium Duty (R05/09)
Topping Off
WARNING! Removing the fill cap on a hot
engine can cause scalding coolant to spray
out and burn you badly. If the engine has been
in operation within the previous 30 minutes,
be very careful in removing the fill cap. Pro-
tect face, hands, and arms against escaping
fluid and steam by covering the cap with a
large, thick rag. Do not try to remove it until
the surge tank cools down if you see any
steam or coolant escaping. In any situation,
remove the cap very slowly and carefully. Be
ready to back off if any steam or coolant
begins to escape.
NOTE: If frequent topping off is necessary and
there are no visible signs of coolant leaks when
the engine is cold, check for leaks with the engine
operating at normal temperature.
WARNING! Handle coolant and antifreeze care-
fully. Ethylene glycol antifreeze is poisonous.
Store in original fluid container only and always
keep out of reach of children.
Proper Coolant Level
NOTE: Do not overfill a cooling system. Excess
coolant may result in overflow, loss of antifreeze,
and reduced corrosion protection.
Check the coolant level after each trip. Add coolant as
necessary. You may find your coolant level is not up to the
Cooling System Expansion Tank
FILL
COOLANT
EXPANSION
TA NK