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Antique Steel Wheel Tractors - Old Iron Lugs and Cleats

'32 F20 Flywheel?


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  #1  
Old 06-13-2012, 11:45:38 AM
Caleb Carpenter Caleb Carpenter is offline
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Default '32 F20 Flywheel?

Since im rerestoring my F-20I had to pull the flywheel, and bell housing off my '32 duckbill to fix a serious oil leak. The flywheel presses on and i dont see any way of putting it back on with out heating it up. Any one ever done one of these. I wonder if heating it would hurt my new felt seal.
I put the engine in another junk f-20 frame welded a bar in front of the crank and tried pressing the flywheel back on the crank with a 10 ton porta power. It went on about 3/4 the way and wont move any more. Im thinking of heating the outside and putting a bind on it to get it on the rest of the way. Any thoughts or experience? I would have hated to done a rear seal back in the day as a mechanic for farmall with the tools they had!
Caleb
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Old 06-13-2012, 12:34:39 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: '32 F20 Flywheel?

If you can get back off, cool the crank for a couple of hours by packing it in dry ice. Make sure to wear gloves, or you will get freeze burns from the CO2. Heat the flywheel to about 200-250 degrees F in an oven. The assemblies should now go together, and when temps equalize, they won't move.

Andrew
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Old 06-13-2012, 01:19:40 PM
Oilpulled Oilpulled is offline
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Default Re: '32 F20 Flywheel?

This is something that seldom needs done. These engines have ball main bearings. I remember Ron Miller having some difficulty with flywheel removal and installation when replacing main bearings which were pitted on a 10-20. IHC advertisements stated that the crankshaft and main bearings are guaranteed for the life of the tractor to the original owner.
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Old 06-13-2012, 03:54:39 PM
J Ware J Ware is offline
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Default Re: '32 F20 Flywheel?

When I replaced the main bearings in our 22-36 and changed the block in our 300 power unit there were 1 1/8" threads in the end of the crank.Used a piece of threaded rod to push the flywheels back on. I also used some emery cloth to clean all rust off all surfaces before reassembly. Went together fairly easy then reinstalled the tapered pin . Jim
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Old 06-13-2012, 04:05:31 PM
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SproutW SproutW is offline
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Default Re: '32 F20 Flywheel?

Caleb,

Sounds like your felt seal is pinched, and keeping your flywheel from sliding on the rest of the way. Most all of the felts you buy today seem to be a tad too big. I usually end up trimming my felts a little so they don't bind. Try fitting the felt on the flywheel before you install, and you will see what I mean. Can you rotate the flywheel at the moment? If not, I'm betting that felt is pinched. I use to install those flywheels with a steel pipe that would fit around the crankshaft and a three pound hammer. Didn't take a whole lot of effort to get them back together. I now have the installation tool used at the dealership, which is easier yet. Hope this helps.

---------- Post added at 03:05 PM ---------- Previous post was at 03:03 PM ----------

I'm actually putting together a Regular engine at the moment that needed a new rear bearing. I'll post pictures in the next couple weeks if you need them.

Last edited by SproutW; 06-13-2012 at 08:15:31 PM.
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Old 06-13-2012, 06:43:38 PM
Caleb Carpenter Caleb Carpenter is offline
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Default Re: '32 F20 Flywheel?

Sproutw- I talked to a guy that had the same problem. What he said makes sense. I build diesel engines for a living and do field work for a living but probably havent cussed something this much in a while He told me that they just drove on and that when the flywheel get hot cold hot cold many times it could shrink. One he had did and he just took a flapper wheel and buffed the inside of the fly wheel out about .002" and it went on. This thing took heat and the 10ton air operated porta power to drive it all the way off. You cant drive it on with a 4lb shop hammer more than a 1/4" so its tight!
The engine turns over currently so im going to pull it off and buff on it with a flapper/paddle wheel in the die grinder and try it again. Its been drove on once before in it life due to the drift marks left towards the inside of the flywheel.
I'll get some pics in a little bit when i get home and post them.
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Old 06-14-2012, 06:28:42 PM
tvfd911 tvfd911 is offline
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Default Re: '32 F20 Flywheel?

I second what sprout said. I swore at mine for many hours and busted a bellhousing out of stupidity doing something I knew better than to do before I asked for advice. Actually, I think Sprout pointed me in that direction.

Best of luck!
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Old 06-14-2012, 09:56:00 PM
Nebraska Kirk Nebraska Kirk is offline
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Default Re: '32 F20 Flywheel?

I made a puller that presses against the end of the crankshaft to pull the flywheel off, I still need to make a tool to press it back on.
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Old 06-15-2012, 06:27:13 AM
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Nebraska Cowman Nebraska Cowman is offline
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Default Re: '32 F20 Flywheel?

I have drove them on cold. But I use an 8 lb hammer on something that heavy. The first mechanic I ever worked for taught me to use the right hammer for the job. Not too big or too little. And he said, "if you are going to hit it HIT it"
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