JAC HFC4181KR1 Owner's Manual page 81

OWNER ' S MANUAL
JAC HEAVY DUTY TRUCK
COOLANT LEVEL AND LEAKS IN COOLING SYSTEM
If lamp is illuminated add the coolant after removing the surge tank cap at firt.
Check reservoir tank for the coolant level.The coolant level should be with in
the range 1 shown in the illustration. If the level is low, add coolant by refer鄄
ence to "Replacement of coolant".
CAUTION:
● Check the coolant level before vehicle operation while the engine is cold.
● After checking the coolant level, be sure to reinstall the cap positively.
● Be sure to add the coolant containing antirust or anti -freeze of the same
concentration as the coolant in the cooling system.
● Do not check the coolant level after the engine has been stopped. Be sure
to check the level when the coolant temperature is low.
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Checking and changing the engine coolant
WARNING:
Do not remove the surge tank cap when the engine is hot. When the engine is hot, the coolant is under pressure and may
erupt through the opening if the cap is removed. You could be seriously burned if you do not observe this precaution.
Do not remove the surge tank cap until the radiator is cool to the touch.
Handling of cooling system
Engine overheating is caused by the low coolant level or rust and scale accumulations in the cooling system. If the radi鄄
ator clogs very badly or coolant is very dirty, perform cleaning and coolant replacement as described below. If the
coolant level is low, add coolant as necessary.
Replacement of coolant
If the radiator clogs badly or coolant becomes dirty, replace coolant immediately regardless of the specified replace鄄
ment intervals. In making this kind of replacement, be sure to clean the cooling system by the procedure shown in
'Cleaning method".
Cleaning method
Run the engine at idle to heat the coolant to 90℃or higher. Then clean by the following procedure.
1. Open the radiator and engine drain cocks to drain the coolant.
2. After complete draining, close each drain cock and fill the system with city water.
3. Close the drain cocks and fill the system with city water. Run the engine for a while and drain the system.
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