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Flywheel ring gear help

E

Eric W

Member
Trying to install a new ring gear on the flywheel on our 860 Ford. Heated it inside to 400 some degrees with a torch and my IR thermometer. Then we tried to drive it on with a flat bar and hammer. This did not work. Now the ring gear looks like it might be just a little out of round and has a little bur around part of it. I have never changed a ring gear before what am I doing wrong? Do I need a press? Thanks for any advice.
 
Your not getting it HOT enough throw away the hightech stuff and HEAT IT when ya got it hot enough it will fall on Now if ya got it all beat out of shape all ya can do is try and get it flat again and put some heat to it .It will shrink on and set tight.
 
I was afraid if I got it too hot it might loose temper or something. HOT I can do, but I don't want to ruin it. Shop manual stated not to heat over 450? It is still flat, just looks a little egged.
 
Heat it some more until it drops on. When it cools it should take the shape of the flywheel.I have changed many iof them on Onan units and some fords.
 
You do not ever drive it on with a hammer.You need to be certain you have the correct ring gear for the tractor.If you do then,lay the gear up on a couple of supports and heat it by running your torch around the gear a bunch of times.There is no need to get it red hot.Just get it hot then pick it up with a pair of channel lock pliers and drop it over the flywheel.It will cool down to the fit.Do not heat it while its laying on the flywheel.No special tools needed for this job.
 
I have changed one on a 540 Cockshutt (Continental F162) by simply putting it in the oven and it dropper right on. You could turn it easily. It tightent right up as it cooled down.
Oven heat it uniformly which helps.
No nice smel in the kitchen, however.
Regards
Neil
 
Do this. Put the flywheel in your freezer over night and leave it there. Take the ring gear and put it in your house oven. Then turn on the oven at 500 degrees. Wait till the oven heat light goes out so you know it is at 500 plus. Pull the flywheel out of the freezer. Then drop the ring gear on that cold flywheel and walk away from it till it is cool. Easy but not fast. BTDT and doing it that way is easy but takes a few hours and is best when the wife is not home LOL
 
I've changed many ring gears. If you can get a hold of accetyline and oxygen, heat up the ring gear. Do not concentrate the heat on one area too long. Slowly move the torch around the ring gear. You will have to hold the ring gear with vice grips. Keep rotating the torch along the ring gear. Will take some time to heat up. Once hot enough the gear will just drop over the flywheel and once it contracts it will be it's normal tight fit. Get it in place resonably fast as the contact with the cool flywheel will allow it to cool off and contract quite fast.
 
I tried it using the oven at 500 degrees with the flywheel in the freezer and it wouldn't work. Ended up putting the ring gear in the barbaque grille and turing up the burners and closing the lid. That WORKED instantly. Swelled it up and it dropped right on. Try it, it works.
 
What the other guys said,

You're not getting it hot enough. Take your time heating it, get 'er red as a sore donkey and it'll drop right on.

Allan
 
Years ago I put one in my wood stove too, then the phone rang & I was involved in a conversation that lasted awhile. When I got back to the gear, it was red hot most of the way around. I put it on the flywheel & it had about an 1/8 inch gap. I thought it was ruined. But it shrank down , got tight & was good to go.
 
I don't have a charcoal grille so I built a charcoal fire in my loader bucket. After the charcoal was nice and red I scatered them around and put the ring gear on them. I can't get near the wifes stuff.
 
Heat most of it red hot with your torch and it should they just fall on. I never heard of just heating it to 400 degrees before. Always red hot.
 
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