Pinion Shaft removal on model 20 - JeepForum.com
 
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post #1 of 12 Old 02-03-2009, 05:33 PM Thread Starter
garbageman
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Pinion Shaft removal on model 20

Tried to remove the pinion shaft inside the carrier with no go. Punched out the roller pin first. Pin spins free inside but will not budge. Knocked it with a hammer and punch. Nope. Removed the carrier and whacked at it. No go. Can I press it out? Should I get another one after that. Suggestions.

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post #2 of 12 Old 02-03-2009, 05:45 PM
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Quote:
Originally Posted by garbageman View Post
Tried to remove the pinion shaft inside the carrier with no go. Punched out the roller pin first. Pin spins free inside but will not budge. Knocked it with a hammer and punch. Nope. Removed the carrier and whacked at it. No go. Can I press it out? Should I get another one after that. Suggestions.
Does it even budge? I would think if you can spin it, it should slide out. Unless it's hitting the ring gear. I understand this is the standard open carrier?
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post #3 of 12 Old 02-03-2009, 05:51 PM
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I think you are referring to the center pin? It should just drop out, they are not tappered at all and just held in with the roll pin which you already punched out. Take a 3/8 extension or bigger punch and drive it out.

If you are referring to the pinion shaft, put the nut back on and give it a nice couple of whacks. Remove the nut and it should drop freely.

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post #4 of 12 Old 02-03-2009, 05:57 PM Thread Starter
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Yes cross shaft. It spins freely in there. Not hitting the ring gear. Will budge 1/16" either way. Roller is free as you can soin the shaft and I shined a light thru. I'll post up pics tonight.
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post #5 of 12 Old 02-03-2009, 06:29 PM
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There's probably a ridge or small shoulder built up somewhere . Probably is going to take a harder whack with hammer and brass drift. Just my guess but post a pic.
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post #6 of 12 Old 02-03-2009, 07:17 PM Thread Starter
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http://picasaweb.google.com/irmosc/1...eat=directlink -go to the end

I have a couple big vises at work and a 20 ton press if needed. I've banged on it with everything I have.
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post #7 of 12 Old 02-03-2009, 07:25 PM
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Remind me why you are taking the center pin out?
In pic 63, how long was the roll pin you tool out, should have been around 1 to 1 1/2 long.
You might try a flat pry bar on the bottom of the spiders to release the pressure a little and try to drive it out. I think you have a piece of the pin still in there, it should not come out that hard. Can you go all the way through with a pic?

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post #8 of 12 Old 02-03-2009, 07:33 PM Thread Starter
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Taking the thrust block out to relieve some binding with new one piece axles.

Pin was in three pieces. It appeared that the cross shaft spun and snapped the roller pin.

Tried prying here and there.
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post #9 of 12 Old 02-05-2009, 02:29 PM Thread Starter
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OK, so the pin was toast so bad that it wallowed everything out and even a 20 ton press was no help. I could have popped it but the carrier would have suffered.

To the spare axle pile and I grab another M20. Good condition and same gear ratio.

Question: should I just swap old ring gear to new carrier and pop it back in or should I swap everything including pinion from one case to the other. The only reason I ask is the replacement is in much better shape and the pinion too. I know I'll have to shim and check mesh. Am I crazy?
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post #10 of 12 Old 02-05-2009, 02:32 PM
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The ring and pinion go together as a set. The only way you might get lucky and not have to re-setup the gears is to put your ring on another carrier. If you change both the ring and the pinion you will have to setup the gears. You can't put a new ring in with the old pinion.
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post #11 of 12 Old 02-05-2009, 03:03 PM Thread Starter
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Yeah I know the set needs to stay together. But since the newer set is in perfect shape and I have new bearings for the pinion, I figure I'll just gut and rebuild with the newer carrier and pinion. The diff location is different or I would just swap axles.
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post #12 of 12 Old 02-05-2009, 03:21 PM
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As foggybob said,
best option would be to swap your ring onto the other carrier. Put your old carrier back in the housing, torque the caps back down and check and record the average backlash at 3 points around the ring gear. When you install the new carrier, try to duplicate the backlash setting.
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