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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 1961 1800A gas - cooling - need advice

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04-16-2013 13:57:15

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If it requires a thermostate and there is no thermostat then the engine will over heat. The thermostate does regulate the tempature and it also restricts the coolant flow. With no thermostat the coolant is just being pumped in a continus circle, it is going through the radiator faster than the radiator can cool it. I have seen this happen on an International as well as a John Deere.

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04-16-2013 14:58:15

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 Re: 1961 1800A gas - cooling - need advice in reply to Tim14167, 04-16-2013 13:57:15  
Heres an example. My oliver 90 was delivered without provision for a thermostat. It had a radiator blind to regulate the water temperature manually. It was later changed to thermostat (the top water manifold was changed, and I still have it).

Heres another. I wondered why may car heater was cold one morning and the engine was running better with the choke in operation. Thermostat was stuck wide open.

Heres another. Most early iron only used thermosyphon as a means of cooling, no pump and no thermostat.

All those examples did not reach proper operating temperature without the thermostat (bar the ollie 90 with the blind well adjusted).

As to the thermistor problem, you likely have a short to earth in the wiring from the guage to the thermistor.

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