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AMC 20 Axle Removal (Read 5007 times)
javsst
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AMC 20 Axle Removal
04/16/08 at 11:49:46
 
Any tips on removing axles out of an AMC 20 rear?  The tech manual indicates a couple of specialized tools, but I can't imagine finding those.
 
Thanks!
 
Steve
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1969 AMX BBO 360/TF727 AMC20 4.10 Gears
1970 Javelin SST BSO 360/BW T10 AMC20 3.54 Gears
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Re: AMC 20 Axle Removal
Reply #1 - 04/16/08 at 12:42:45
 
You are pulling them for Mosers right?
If so then all you need to do is disassemble the brake shoes from the backing plate along with the wheel cyl and ebrake cable. Undo the bolts that hold the backing plate to the housing and pull the axle with backing plates as an assy. You may need to use a little force to get them out as the bearing is a tight fit in the housing.
With the assy. out of the housing cut the outer cage off the bearing so the rollers fall out and slide the backing plates off. Moser needs the axle & hub only. Also make note what axle is longer & what backing plate goes on what one so you can put it back together right.
 
Now if using for drag racing I would brace up the spring perches so the don’t collapse and weld up the tubes to the center section so it will not turn on the tubes. They say the tubes will twist if you put a lot of HP to it but who know what that is. Perches collapse at 500 HP just ask Davis. Yes my 20 is braced & welded with Mosers.
Dave ----
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javsst
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Re: AMC 20 Axle Removal
Reply #2 - 04/16/08 at 13:18:44
 
Dave -  Yes - Mosers are going in, so that sounds like a plan.  Thanks!!
 
Yeah, I already was planning on welding the tubes, so the perches are a good
idea as well.  How are your perches braced?
 
Steve
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1969 AMX BBO 360/TF727 AMC20 4.10 Gears
1970 Javelin SST BSO 360/BW T10 AMC20 3.54 Gears
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Re: AMC 20 Axle Removal
Reply #3 - 04/16/08 at 13:47:32
 
I took 1/8” flat stock that would fit inside the perch and long to reach up to the tube and weld. I braced front and back to be on the safe side. I had seen perches collapse years before Davis had his collapse (last year) and why I did mine when I built my car.


 
BTW when you get the axles out they should look like this

If you have time I have 426 pictures (52 pages) of when I was building my car in the last 4 years. I stated it over 12 years ago before I had a camera and web site.
http://cars.grantskingdom.com/pics/racecar?page=1
Dave ----
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javsst
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Re: AMC 20 Axle Removal
Reply #4 - 04/16/08 at 14:40:23
 
Dave,
 
Perfect, thanks!!!!
 
Steve
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1969 AMX BBO 360/TF727 AMC20 4.10 Gears
1970 Javelin SST BSO 360/BW T10 AMC20 3.54 Gears
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Re: AMC 20 Axle Removal
Reply #5 - 04/16/08 at 17:19:29
 
Dave - before I forget, where did you get the bearings from?  I recall a thread here a while ago with tapered vs. non-tapered bearings.
 
Thanks!
 
Steve
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1969 AMX BBO 360/TF727 AMC20 4.10 Gears
1970 Javelin SST BSO 360/BW T10 AMC20 3.54 Gears
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Re: AMC 20 Axle Removal
Reply #6 - 04/16/08 at 19:40:06
 
I got them from Moser with the axles. Did it before that post was out.
For street and drag I don't think it's a big deal what type you use.
I think where this came to light was from the road race guys who put a LOT of side load on the bearings and that is the only thing holding the axles in the housing.
My .02 any way undecided
Dave ----
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javsst
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Re: AMC 20 Axle Removal
Reply #7 - 04/16/08 at 23:33:50
 
Dave - thanks for the info.
 
Stopped by the garage on the way home from work.  Stripped the backing plates down, took the flange bolts
out.  Used a brass drift through the wheel cylinder hole in the backing plate to tap out the axles.  They
popped out without any issues.
 
Steve
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1969 AMX BBO 360/TF727 AMC20 4.10 Gears
1970 Javelin SST BSO 360/BW T10 AMC20 3.54 Gears
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Re: AMC 20 Axle Removal
Reply #8 - 04/19/08 at 05:39:43
 
Ratech Manufacturing
Ratech Ring and Pinion
11110 Adwood Drive
Cincinnati, OH 45240  
Phone: (513) 742-2111
Fax: (513) 742-8033
 
Homepage            http://www.ratechmfg.com/
                 http://www.ratechmfg.com/toc.htm
YaHoo Store      http://ratech.stores.yahoo.net/index.html
 
AMC Model 20 Axle Bearings - Tapered Roller
Wheel Bearing AMC 20, 63-79 Corvette (outer)
LM48510/48
9109      $11.00
 
AMC Model 20 Axle Bearings - Tapered Roller
LM48510/48
9109      $11.00
6165      Seal, Inner      Interchange      7687S
6166      Seal, Outer      Interchange      8549S
 
----------------------------------------------
 
Basic Ring and Pinion Installation Kit - AMC Model 20 Axle
Contains Pinion Shims, Crush Sleeve, Pinion Seal, and Cover Gasket.
(Image typical - Kit may vary from image but will contain appropriate parts)
426K      $22.00
 
Ring and Pinion Installation Kit - AMC Model 20 Axle
Contains Pinion Shims, Carrier Shims, Crush Sleeve, Pinion Seal, Pinion Nut, Ring Gear Bolt Set, and Cover Gasket.
(Image typical - Kit may vary from image but will contain appropriate parts)
139K      $43.00
 
Pinion and Carrier Bearing Kit - AMC Model 20 Axle
Contains Pinion and Carrier Bearings.
 (Image typical - Kit may vary from image but will contain appropriate parts)
219B      $49.00
 
Complete Ring and Pinion Installation Kit - AMC Model 20 Axle
Contains Pinion Shims, Carrier Shims, Crush Sleeve, Pinion Seal, Pinion Nut, Ring Gear Bolt Set, Cover Gasket, Pinion Bearings, Carrier Bearings, and Marking Compound.
(Image typical - Kit may vary from image but will contain appropriate parts)
319K      $95.00
 
Pinion Shims - Model 20 Axle (3.22 O.D.)
These fit in the original factory location behind the bearing cup.
1127      $20.00
 
Carrier Shims - Model 20 Axle
1130      $28.00
 
Crush Sleeve - AMC Model 20 Axle
3104      $4.00
 
Solid Pinion Bearing Spacer with Shim Pack
For non-35 spline pinion.
4105      $15.00
 
Pinion Seal - AMC Model 20 Axle
6112      $11.00
 
Pinion Nut - AMC Model 20 Axle
1506      $6.00
 
Ring Gear Bolt Set - AMC Model 20 Axle
1320      $8.00
 
Cover Gasket - AMC Model 20 Axle
5120      $6.00
 
Head Bearing - AMC Model 20 Axle
M802011/48
7005      $22.00
 
Tail Bearing - AMC Model 20 Axle
M88010/48
8003      $16.00
 
Carrier bearing Set - AMC Model 20 Axle
LM603012/49
9001      $35.00
 
Wheel Bearing AMC 20, 63-79 Corvette (outer)
LM48510/48
9109      $11.00
 
Axle Seal (outer)
8549S
6166      $6.00
 
Axle Seal (inner)
7687S
6165      $6.00
 
------------------------------------------------------------------------
 
( some stuff saved from some other posts )
 
AMC AMX AXLE BEARING INFO
 
part # RW903RCJ
      # RW903RCJ74
 
well i just happen to still have the empty box in my tool box
from the bearings that moser sent me with my axles about 9 years ago,
and the part # on it is RW903RCJ and under that it has the # RW903RCJ74  
 
these are the "green bearing" high performance wheel bearings made in the U.S.A.  
 
a division of AB&W metal forming  
a park-ohio company  
Cleveland, Ohio 44105
 
------------------------------------------------------------------------
 
The axle bearing for a Model 20 is BCA/ NATIONAL  A5  bearing.  The bearing comes with the cup.  
Can be purchased at any bearing supplyer or at a place like Rockauto.
 
PS.
Upon futher checking,  the RW903R interchanges to an A9 bearing.
Dont know why.  Maybe what Moser uses.
The correct bearing for stock axles is A5.
I can help you with interchanges if need be.
 
I rebuilt my rear a couple weeks ago  and I still had the bearing from the axles,  
1-Tyson bearing LM48548  made in the good old US of A  
1- Timken bearing LM48548 made in the good old US of A
 
------------------------------------------------------------------------
 
I got my axles back from Moser and had my machine shop press the bearings on.
Everything went very smoothly with the right axle.
The left axle was cut incorrectly, the width of the axle where the bearing sits was not cut uniformly,
it measured between 1/370 and 1/375.
The bearing pressed on fine at first and was loose the further it went.
I spoke with a Moser rep and he said it should be at 1/381.
I'm sending it back. Here is a pic of the right side installed.
 
------------------------------------------------------------------------
 
 Cool
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