Posted by caterpillar guy on June 10, 2021 at 18:54:33 from (47.26.95.42):
In Reply to: IH 966 coolant leak. posted by jacksonduper on June 10, 2021 at 14:20:11:
From 40+ years of experience with IH tractors They tend to have plenty of coolant capacity in them. This is from an H to the 4166 and several models in your vintage and sizes bigger and smaller. Start by checking the level. It does not need to be full to the top. Just cover thwe core tubes by an inch will be good. Then check for circulation with the cap off. If good then look at the rad on the outside if you can;t see a light through it you need to clean it out good. Then should be fine run again and watch if still a problem then pull thermostat and heat with candy thermometer to see when open if it is at the same temperature as is stamped on it. Or around 160-180 degrees. If good then is fan belt tight and pulleys not worn out with big ledges in the vees. Fan should not be readily turned inside belt either direction though one way will usually trun easier than the other.
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
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