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AD axle pivot rebuild
#1409742 Thu May 13 2021 06:07 AM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
So I'm trying to rebuild my rear axle pivots. When I disassembled one, I discovered some rust at the end of the sleeves where the rubber washers are. I figure for the cost of a rebuild by Steele at ~$125 per side, and another $50 for the rubber washers, I can do a better job by casting urethane to form the rubber and the washers in one piece. I just finished building a form for the washers out of a 1-1/2 inch PVC coupling. The Inside diameter is just about the exact diameter of the washers (1.9 inches vs 1.875 inches for the washers). I sliced the coupling into a short section so the body is held the proper distance from the end of the sleeve (3/16"), and another for the other end. I'm using RTV to hold the rings in place and will use some silicone grease on the ID of the rings for release agent. The urethane cast around the ends of the sleeve should eliminate the potential for rust on the end of the sleeve. The urethane is the same stuff I used to rebuild the transmission rear mount. The center bolt hole was hogged out on the body, so I welded that up. Here's some pics. I'll follow up when I get further along.

Attached Files
IMG_3904.JPG (249.03 KB, 174 downloads)
IMG_3905.JPG (200.99 KB, 172 downloads)
IMG_3906.JPG (150.06 KB, 173 downloads)

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: AD axle pivot rebuild
klhansen #1409774 Thu May 13 2021 02:52 PM
Joined: Feb 2004
Posts: 22,578
H
'Bolter
Looking good! That setup is similar to the aluminum molds used for pouring new Babbit bearings, where the "release agent" is soot from an acetyline torch flame without the oxygen added.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: AD axle pivot rebuild
klhansen #1409777 Thu May 13 2021 03:12 PM
Joined: Feb 2019
Posts: 1,968
P
AD Addict
During my career in the Nuclear field, I rebuilt many cast iron pump casings and heat exchangers with a type of epoxy metal called Belzona. Very expensive, as it was approved for use in some “Safety Related” equipment, and it worked really well. Belzona had a special release agent ($$$), that I used on the dams to help form the degraded sections. It looked and smelled just like Johnson’s Butcher wax. After running out of that special release agent, I used some Butchers Wax and found it worked exactly the same.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: AD axle pivot rebuild
klhansen #1409779 Thu May 13 2021 03:48 PM
Joined: Feb 2004
Posts: 22,578
H
'Bolter
When I'm using Brownell's "Acra-Glass" epoxy bedding compound to fit a rifle action to a gunstock, I use a generic brand of spray cooking oil like PAM as a release agent. Several coats of Johnson's paste wax also works well
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: AD axle pivot rebuild
klhansen #1409785 Thu May 13 2021 04:59 PM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Can't use a spray release product as it would get places where I want the urethane to stick. I used silicone grease on the mold for the transmission mount I fixed. Just about anything would work as a release agent, even motor oil for this project. The urethane may not even stick to the plastic rings, but I don't want to take that chance, because I need to reuse them for the other side. I know it will peel right off the plastic mixing cups I've used for the urethane. I'll probably use a plastic sheet on the bottom.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: AD axle pivot rebuild
klhansen #1409866 Fri May 14 2021 04:50 AM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Mixed up some urethane and poured it in the assembly today. I put some black tint in it and may have used too much, because it's taking much longer than normal to set up. Still sticky. I may have to start over. Had a little leakage around the bottom ring, but shouldn't be a problem. I'll give it overnight to set up and see how it goes.

Attached Files
IMG_3907.JPG (157.09 KB, 129 downloads)
IMG_3908.JPG (138.02 KB, 129 downloads)

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: AD axle pivot rebuild
klhansen #1409918 Fri May 14 2021 07:07 PM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Update: That batch was messed up. I guess full 10ml vial of tint vs 8 drops made the difference. The first batch never did set up, but it was BLACK. grin I was able to push the sleeve out with my thumbs, which was definitely not something I was going to use under my rear axle.

Poured a second attempt today and it set up within an hour as expected. I guess I'm getting better with practice. wink Should be able to strip the rings off in a bit and will post a pic of the finished product.

Last edited by klhansen; Fri May 14 2021 07:08 PM.

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: AD axle pivot rebuild
klhansen #1409956 Sat May 15 2021 04:08 AM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Here's the pics of the second attempt. Came out looking good, I think. The material hardened up as expected and the integral washers should keep the housing centered nicely.

Attached Files
IMG_3909.JPG (172 KB, 98 downloads)
IMG_3911.JPG (246.24 KB, 98 downloads)
IMG_3912.JPG (239.67 KB, 98 downloads)

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: AD axle pivot rebuild
klhansen #1409959 Sat May 15 2021 11:05 AM
Joined: Feb 2019
Posts: 1,968
P
AD Addict
Looking good Kevin! How the you keep the center sleeve centered in the housing?


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: AD axle pivot rebuild
klhansen #1409968 Sat May 15 2021 01:46 PM
Joined: Mar 2007
Posts: 1,180
T
Crusty Old Sarge
That looks factory fresh, just shows what a little outside thinking can do. Nice job.


Craig

Come, Bleed or Blister something has got to give!!!
59' Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)
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