JD 620 Water pump bypass tube

Anonymous-0

Well-known Member
Replacing a very worn water pump on the JD 620 gasoline engine tractor. New pump came with a plug in the bypass tube hole on the pump. How important is the bypass tube? Can I safely run the tractor w/o the bypass tube and just plug the bypass tube hole on the engine to radiator hot water pipe?

Thanks
Fred
 

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