Challenger Techstar CVT MT525B Series, Operators Instruction Book

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5 . MAINTENANCE AND ADJUSTMENTS
5.16 Challenger MT500B EU
5.10 - COOLING SYSTEM
Check the coolant level every ten hours (this interval is
flexible).
The coolant quality can have a great effect on the efficiency
and life of the cooling system.
The antifreeze mixture must always be between 40 - 50%
antifreeze for 60 - 50% water.
Even the "non cold" regions must respect the minimum 40/
60 mixture, in order to raise the boiling point, and protect
the system against corrosion.
The water used should be a clean, soft and non acid.
Use a permanent type Ethylene/glycol mix according to the
following specifications:
Coolant specifications
Use the coolant recommended by your dealer. The coolant
must meet the following standards:
CAT engines: ASTM D3306 (USA), BS 6580:1992 (Europe/
UK), AS2108:1977 (Australia).
Sisu engines: ASTM D3306-74 (USA), BS 6580:1992 (Eu-
rope/UK)
Check the quality and level of mixture regularly, at least
once a year, and avoid the addition of pure water in the sys-
tem that will dilute the mixture.
NOTE: Never use pure water as a coolant.
IMPORTANT: If the correct procedures are not used,
AGCO cannot be held responsible for damage caused.
Change the coolant every 1200 hours
Clean the radiator fins every 400 hours (this interval is
flexible) using compressed air.
Check the fan belt tension every 100 hours.
Expansion tank (Fig. 18)
Periodically check the level of coolant in the expansion
tank, the red indicator light comes on as soon as the mini-
mum level of coolant is achieved.
NOTE: When filling, do not exceed the mid-way point
on the tank.
IMPORTANT: After filling, clean traces of liquid from
the filling port.
WARNING: If the engine is very hot, loosen
the plug at the first clevis and remove it to
lower the expansion tank pressure.
After filling:
1. Open the heater tap fully and run the engine at 1000
rpm for several minutes.
2. Then stop the engine, recheck and, if necessary, top
up the expansion tank with coolant (ref. 1). Refit the
plug.
CAUTION: Precautions against frost: Check
the degree of protection of the coolant before
each cold season.
Fig. 18
Z2-501-05-03
1
MAX
MIN
COOLANT
LEVEL-COLD
Z2-500-05-03