starter ring gear

CCer · Nov 7, 2015

I had an aluminum flywheel, with a steel ring gear on it. The ring gear kept coming loose. I did the usual, heated the ring gear, and dropped it on the flywheel, but it didn't hold. Ever had that problem?
how did you repair it? I wonder if I were to heat the ring gear, let it cool, then do it again, and again, would the ring gear shrink enough to hold tight, when finally installed?

Andy Martin · Nov 7, 2015

Steel will return exactly to where you started if it is not heated to a temperature which will damage it. Repeated heating will not fix your issue. JB Weld might hold it on. Or, crazy ideas: you might try peening the flywheel with the ring gear off to swell it just a bit, or drill and tap and set screw six places around the joint but it will be hard to tap with aluminum on one side and steel on the other. Probably you need to replace the flywheel.

Moonlite37 · Nov 7, 2015

Ever hear of Loc-Tite?

ed will · Nov 7, 2015

Hi, before you buy a flywheel. Try taking a centre punch and make 2 rows of good dimples just where the ring gear will sit. I would go about 3/4"apart and staggered. Good luck. Ed will oliver bc

john in la · Nov 7, 2015

Before I replaced the flywheel I would try drilling 4 small evenly placed holes threw the ring gear and flywheel.
I would then hammer a roll pin into each hole.

You got nothing to lose cause the only other solution is to replace the flywheel.

markct · Nov 7, 2015

Are you saying you removed the ring gear and heated and installed a new one, or just reinstalled the old one? If so I would try a new ring gear first

ed will · Nov 7, 2015

Hi, before you buy a flywheel. Try taking a centre punch and make 2 rows of good dimples just where the ring gear will sit. I would go about 3/4"apart and staggered. Good luck. Ed will oliver bc

Bob · Nov 7, 2015

He may as well as well slather some red Loctite sleeve retainer in there as well.

The combo of the dimples and the red goo is called a "strawberry fit"!

Robert Major · Nov 7, 2015

Hi Maybe you should try talking to my local JD dealers they told my customer different. story was I could push bearings over a flange on a tractor
front axle hub shaft by hand if the alighnment was right and pull them off again. I said the shaft was screwed it should of been press or heat to fit.
Jd service manager told my customer I had no clue what I was at and if they did it they would heat and shrink everything tight. Guy came got the
tractor and took it to them.
Funny thing was they put the new bearings on worn shafts, I know I was Right with my finding. I asked the customer if they billed new parts. He said
no they heated and installed the new bearings, I had given back to the guy. That tractor was traded shortly after so I guess the new owner found out
what happened when the bearings moved on the shaft and the seals started leaking again L.O.L.
Regards Robert

guido · Nov 7, 2015

Hello CCer,

How about drilling through the ring gear into the flywheel? Three holes would do. Install three spring lock pins just below the surface, and dab the hole with locktight,

Guido.

Janicholson · Nov 7, 2015

On a good size lathe a Knurling tool can be used to emboss a uniform pattern on the aluminum surface that tapers from light to heavier from the open side to the ledge it stops against 30 bucks or so. Jim

rustred · Nov 8, 2015

all you need to do is use some green loctite on the surfaces and guaranteed it is all you need. no peening or heating.

rustred · Nov 8, 2015

all you need to do is use some green loctite on the surfaces and quaranteed it is all you need. no peening or heating.

4play · Nov 8, 2015

Using the brand loctite, or stating a certain color is not the best way to explain what's best. The brand loctite makes specific products for applications like this one, its not identified by color and its not a thread locker.

Look at the "retaining compounds" offered by loctite. They make several different types depending on what you have or think will work best. Most of these compounds would be used for metal plugs, freeze plugs, press fit bearings, bushings or races, gears etc.

http://www.henkelna.com/industrial/loctite-retaining-compounds-for-manufacturing-assembly-22361.htm

Bob · Nov 8, 2015

Thought I kinda covered that when I wrote "red Loctite sleeve retainer". Not QUITE the EXACT wording but darned near close enough, I THOUGHT???

Owen Aaland · Nov 11, 2015

(quoted from post at 23:07:50 11/07/15) Hi Maybe you should try talking to my local JD dealers they told my customer different. story was I could push bearings over a flange on a tractor
front axle hub shaft by hand if the alighnment was right and pull them off again. I said the shaft was screwed it should of been press or heat to fit.
Jd service manager told my customer I had no clue what I was at and if they did it they would heat and shrink everything tight. Guy came got the
tractor and took it to them.
Funny thing was they put the new bearings on worn shafts, I know I was Right with my finding. I asked the customer if they billed new parts. He said
no they heated and installed the new bearings, I had given back to the guy. That tractor was traded shortly after so I guess the new owner found out
what happened when the bearings moved on the shaft and the seals started leaking again L.O.L.
Regards Robert

It is quite normal for a tapered roller bearing cone to be a slip fit on an axle since they are designed to rotate a bit on the shaft. Since the load is carried on the bottom of the bearing the slight rotation helps equalize the wear all around the inner race prolonging the life of the bearing. I don't recall ever working on any wheel bearings where the cone was a press fit on the axle.

starter ring gear

CCer

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Andy Martin

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Moonlite37

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ed will

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john in la

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markct

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ed will

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Bob

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Robert Major

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guido

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Janicholson

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rustred

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rustred

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4play

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Bob

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Owen Aaland

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