Cooling System Fill and Deaeration Procedure
IMPORTANT:
Use only permanent-type low silicate ethylene glycol base antifreeze in coolant solution. Other types of antifreeze may damage cylinder seals.
FREEZING TEMPERATURES: Fill with permanent-type, low silicate, ethylene glycol antifreeze (without stop-leak additive) and clean, soft water. Add TY16004 John Deere Coolant Conditioner or equivalent.
Fill
Fill radiator to the bottom of the radiator fill neck.
Fill the recovery tank to the FULL mark.
Deaeration
The cooling system requires several warm-up and cool down cycles to deaerate. It will NOT deaerate during normal operation. Only during warm-up and cool down cycles will the system deaerate.
1.
Start engine. Run engine until coolant reaches a warm temperature.
2.
Stop engine. Allow coolant to cool.
3.
Check coolant level at recovery tank.
4.
Repeat Steps 1-3 until recovery tank coolant level is repeatedly at the same level (stabilized).
NOTE:
The level of the coolant in the cooling system MUST BE repeatedly checked after all drain and refill procedures to insure that all air is out of the system which allows the coolant level to stabilize. Check coolant level only when the engine is cold.
5.
If necessary, fill recovery tank to FULL mark. Cooling system capacity is approximately 24.6 L (6.5 gal) for the 643H and 30.7 L (8.1 gal) for the 843H.
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