Flywheel ring gear install question part 2

old · Jun 23, 2008

Well I set the flywheel in the freezer for about 2 hours tonight and then around 10pm put the ring gear in the oven and set it at 500. As soon as the oven kicked off saying it was 500 I pulled the flywheel out and dropped the ring gear on. Took all of maybe 5 minutes for it to cool down and be tight. But because this is the old type flywheel I still need to tack weld the gear on or the starter will knock it back off in a few years or less.
Thanks guys
Hobby farm

Bob · Jun 24, 2008

That method works quite well, doesn't it!

MurrayE · Jun 24, 2008

Thanks for the information.I have the same project waiting to be started. Only one question unanswered. Length of time for the ring gear to be in the oven ?. thanks, Murray

Anonymous-0 · Jun 24, 2008

Cast iron fly wheel and steel ring gear are trouble when welding.Welds will break away from cast during cooling.Im looking for a retired propane gas grill to heat cast iron for welding and for a slow cool down.

Allan in NE · Jun 24, 2008

Cast iron flywheel?

Allan

Anonymous-0 · Jun 24, 2008

Don't weld it. Unless the flywheel is bad...it should be good to go.
You would be surprised how tight that fit is Old.
If you try and weld it you will take the hardness out of the teeth...and they will wear like crazy...or just plain break.

IaGary · Jun 24, 2008

We use an old gas oven to preheat and cool. It is insulated and the temp can be controlled better. Especially on cool down.

And while brazing and welding you can set it on top with the burners on to keep it warm.

Gary

Kentb of SWMO · Jun 24, 2008

Normally you do not need to go as far as OLD did to install a starter ring. All I've ever had to do was hold the starter ring with a pair of plier, then heat about one half of the ring with a torch. You DO NOT what/need to heat the ring to any where near red. Just heat the ring and drop it on. It might not fall all the way on and you will need to drive it to the final seating point.

Kent

Anonymous-0 · Jun 24, 2008

Take a look at old Ford flywheels,you couldnt afford to machine them from steel.JD 2 cyl.fly wheel are cast iron.

rhouston · Jun 24, 2008

I think he did answer the how long question. Sounds like he put it in the oven and turned the oven on to 500. When the oven was done with it's preheat (get the temp to 500) he took it out possibly about 5 to 10 minutes on my oven. That's the way I read it.

Allan in NE · Jun 24, 2008

Thanks,

That's why I asked; never been around one.

Allan

P and R Pete · Jun 24, 2008

I heated my ring gear to 300, (without cooling the flywheel), and it dropped right on.
Guess I got lucky!

Bob · Jun 24, 2008

Outside of billet steel racing flywheels, what flywheels do you know of that are NOT cast iron?

old · Jun 24, 2008

On these tractor its a common problem with the ring gear being knocked of the flywheel because of how it set up. The later ones changed flywheel design so this would not be a problem but because of this being an early one it the only way to keep it from being knocked off. I have special rod just for this job
Hobby farm

old · Jun 24, 2008

I put the ring gear in the oven. Turned it on to 500, when the light said it was at 500 I pull it out with oven mitts and dropped it on. Took maybe 5-10 minutes. I did freeze the flywheel for about 2 hour but probably didn't need to do that. I almost thought it was going to drop past the ridge it sits on because of how much it expanded
Hobby farm

old · Jun 24, 2008

Yep made something that seemed hard to do child's play. Now the fun of welding the ring gear on. Sure wish this was the newer type flywheel instead of the old style. But I did pick up some rod made just for this type of job. 3 sticks cost me $8
Hobby farm

Janicholson · Jun 24, 2008

Dear Old,
Drill five holes in the system just at the point where the ring gear is touching the FW. Angle the drill so it touches both the FW, and the ring gear. Find a couple of needle bearings from an old "U" joint, measure them, and use a drill bit about .002" smaller. Drive the pins in the hole until they just protrude a little, and the ring gear is held on, (and removable) JimN

Janicholson · Jun 24, 2008

Befor welding, check my method above. Ive used it several times. To fix this, and similar issues. JimN

Anonymous-0 · Jun 24, 2008

500 deg. F is a little on the hot side but considering it's a ring gear it should be fine.........if it were a bearing or a gear used in an engine, trans, diff., final drive, etc. that would be a different story..............

old · Jun 24, 2008

If it had not been welded before I would probably use your other method but because it had been welded before and has broke out spots on the flywheel I figure I weld again so as to sort of fill those broke out spots. I figure it shouls help the weld some also

Janicholson · Jun 24, 2008

That is cool.
Bimetalic welds are tough to have stay together as the two materials heat and cool over time stress risers propagate cracks across them. It will be fine.
The temp of the ring was probably in the 350 to 400 range because the air temp in the ovin is higher than the material temp. That is why many recipes call for preheating the ovin. JimN

old · Jun 24, 2008

Thats why I spent $8 on 3 rods because its made just for this type of weld. As per the pack its made to hold well with out per heat and some how works well on metals like the ring gear and flywheel. But of course only time will tell for sure

Phil9N3667 · Jun 24, 2008

I used to work on a fleet of late 60's/70's Mack log trucks and had one come in one day with the ring gear slipping on the flywheel. The boss was about to go up the wall because we had just recently put a clutch in it and didn't have the time or spare truck to use. I said something like "how about getting it back in place and welding it in a few spots"? He said OK and I clamped it together with Vice Grips, tacked one place, turned it a half a turn, did it again and then 90 degrees from the first spots. When we sold the truck a few years later it was still there! It doesn't take a whole lot of weld, just have good penetration and it'll hold.

Flywheel ring gear install question part 2

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