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Allis Chalmers Discussion Forum

Replacing Starter ring gear-Advice needed

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Steve in S. IL

10-11-2007 19:43:36

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I am about to undertake replacing the ring gear on my CA. A friend has a homemade stand for the front half. How would you support the rear half?
Suggestions on getting the old gear off?
What is the best way to get the new gear on?
Any and all suggestions/advice will be greatly appreciated. I have the service manual.

Steve in S. IL

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10-18-2007 08:06:47

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 Re: Replacing Starter ring gear-Advice needed in reply to Steve in S. IL, 10-11-2007 19:43:36  
I have personally had luck taking off the flywheel from the tractor and heating ring with a tiger torch. after heated, flip over and it will fall off! heat new one, not so hot that it discolors... use a hammer and a flat punch to punch it on evenly. make sure it is facing right way!

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Dick L

10-12-2007 06:38:32

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 Re: Replacing Starter ring gear-Advice needed in reply to Steve in S. IL, 10-11-2007 19:43:36  
In splitting your tractor: The steps I have used for years:

First step I take is to jack up the rear of the tractor and then place jack stands under the drawbar or final drives if I have the drawbar removed.

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Then I place a jack or jack stand under the torque tube.

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I then use an engine lift to hold and move the front of the tractor away from the torque tube.

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To Remove A Ring Gear From The Flywheel:

I use a cold chisel to drive between the flywheel and ring gear. I just start to move the ring gear and then move the chisel a little and drive it until it moves a little. I work around the flywheel as many times as it takes to separate the two parts. You will have no damage to either parts and I many times flip the ring gear and reuse it after grinding a lead on each tooth.

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10-11-2007 22:15:06

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 Re: Replacing Starter ring gear-Advice needed in reply to Steve in S. IL, 10-11-2007 19:43:36  
Steve; positively identify which side of your new ring gear will be up, to match how the old ring gear was installed. Take flywheel off engine. To remove the old starter ring gear, drill a series of close spaced 1/8 inch holes thru the rear face of the gear(clutch side) at the bottom of the tooth, to nearly cut the gear into. Then drive small punch into holes to complete the break. Don't drill clear thru the gear into the flywheel. Wire brush and clean the shoulder of the flywheel real well, check for, and remove any nicks or burrs from the shoulder area. Place the new gear on the middle rack of your wife's oven and set the temp for 250 degrees.(might be good to go for forgivness rather than permission) Heat gear for 1/2 hour, use leather gloves to lift out gear and lay on flywheel shoulder imediatly, tap down gently with soft faced hammer as needed to seat tight on shoulder. The cooler the fly wheel the better. I have done many of these over the years, and this is the best and safest way I have found, discounting my wife and her oven. I use chain hoist or cherry picker on the engine end and block up the back end. If you have acsess to a safe stand for front end, you could quickly rig a stand to the bolt holes on the torque tube. the back end is light enough to roll easily. Good wrenching.

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