Bearing istalation help needed

tomstractorsandtoys

Well-known Member
I have a bearing that I am replacing on a transmission shaft. Service manual says to heat to no more than 300 degrees and install. What do I do? Put it on a cookie sheet in the oven for half hour on 300 degrees? Or do I need to have it in oil or something? Thanks Tom
 
A safer procedure might be dry ice. Some super markets have the stuff. Put your part in a Styrofoam cooler and a big chunk of dry ice. Let her sit over night. Just make sure you wear a pair of really heavy gloves cause metal that cold will burn your skin.
 
Glennster had a tip that I used to install some gears on a shaft. I used old fish fryer oil in a pot that mama don't care about, heated over a propane burner just outside the shop door. A fish fry thermometer will get you the exact temperature that you want. You can carry the pot right in to the tractor where it will be handy. I made a wire bail to lift the gear out of the oil. I know you mentioned that you're working on a bearing, but I don't see why it wouldn't work.
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You need the shaft already positioned not more than a couple of steps away so you can pick it up with pliers or something just drop it on and have a hammer and punch ready to tap it on if it gets stuck before seating
 
An old pot and a camp stove works for me. Fill the pot with oil get and yourself a thermometer,I use an old cooking thermometer. 300 degrees isn't hard to do. But use caution, igniting the oil is possible. I have never seen it happen but I do keep an extinguisher handy.
 
I use an old electric frying pan that my wife was going to throw away because the coating was coming off. Enough oil to cover the bearing or whatever, then set the thermostat to the desired temp. Been using it for 15 years now.
 
I have used a large heat lamp we had for chickens. I just set the bulb on the bearing and warmed it up.
 
I have and old deep fryer that i use , I use Hy Tran in it . I can run it of the portable gen in the filed our off a cord . Fill turn on and set the temp and walk away . when the light goes out stick the bearing in and the light comes back on and when it goes out it is 300 degrees , remove bearing and place on shaft let cool all done
 
I do the exact same thing as tractorvet. Well except I think I put in 80w90 and it stays there, other than that the same. Works like a charm for me.

jt
 
(quoted from post at 13:44:39 03/23/17) I have a bearing that I am replacing on a transmission shaft. Service manual says to heat to no more than 300 degrees and install. What do I do? Put it on a cookie sheet in the oven for half hour on 300 degrees? Or do I need to have it in oil or something? Thanks Tom
I put a little oil in a frying pan and heat er up . I also have a little electric hot plate I use
 
I have used one of those magnetic oil pan heaters before, but heated oil would be way more better.
 
Cold shrinks metals. His shop manual said to heat it. Heat expands metals. His bearing installed on the shaft must have really close tolerance for fit. Heating the bearing will expand the metals in it just enough to give it more clearance to slide it over the shaft. When it cools it will contract and fit tight on the shaft. Freezing a part works well when installing a close tolerance part into a bore. (Something like dry fit cylinder sleeves into an engine block.)
 

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