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1980 JD 400

4471 Views 46 Replies 20 Participants Last post by  markdtn, 
R&R Outdoors
I have acquired the tractor I learned to do work on about 30 years ago. THE John Deere 400!. My grandfather bought it brand new in 79 or 80. My dad used it from 1992ish until 1996ish when the engine scattered. This tractor has been sitting untouched in my garage since the last time it moved about 25yrs ago. Other than the scattered engine, it is cherry- Grandpa and dad took very good care of it. My question is........is it worth my time and money to get the beast going again? (After my son and I get our 60 rebuilt [see introduction thread])
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dhager4692
TempletonJDguy said:
Those onans for some crazy reason always have oil very high on the stick till you wipe it and recheck
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motiv8 said:
The reason oil stick readings on any engine often read high after sitting is the hot air in dipstick tube cools and contracts drawing oil up tube if the seal at tube top is good. David
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You can also add that onan on the stroke create a vacuum and air is sucked out of dipstick tube. Since the tube is below the oil level, oil gets sucked up the tube. When I remember I loosen the oil stick for a minute and then tighten it back after I have parked it and shut it down.Then there isn't the oil inside the tube to interfere with the reading.
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