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Re: Pulling rear axle to stop oil leak
bucktruck #1378689 Sun Sep 27 2020 05:50 PM
Joined: Mar 2002
Posts: 9,030
Master Gabster
The Chevy cars of those days had axles that could be repaired with a bushing. I am under the impression that the axle would be turned down and the bushing pressed on.I have an axle like that on my 38. I have the bearings and the bushings. Chevs of the 40s has those for the cars. I am wondering if one took one of those bushings and bearings for a car to a machine shop, they could make one for the truck. The matched set for the car would demonstrate the clearance needed for the bearing.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!
Re: Pulling rear axle to stop oil leak
bucktruck #1378698 Sun Sep 27 2020 07:19 PM
Joined: May 2015
Posts: 2,778
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
More info that might help someone trying to repair a worn axle.
According to RockAuto
A '51 1/2 ton pickup takes a National R1502E rear axle bearing which has a bore of 1.877", OD of 2.782", and width of 0.875". Since this is a roller bearing w/o inner race that would mean the axle would be slightly less than 1.877" in diameter at the bearing surface.
A '51 BelAir takes a National R1500EL rear axle bearing which is also a roller bearing without inner race. OD is listed at 2.4062", Width of 0.75" (no bore diameter listed, but This [ntnamericas.com] lists bore dia of 1.580"). Another bearing for that application Timken R1500EL is a roller bearing with both inner and outer races. OD and width are same as the National, and bore is 1.580", so that tells us that the axle diameter is slightly less than 1.580 at the bearing surface.
So it appears that car and truck axles are not interchangeable.
The link I listed may help find an inner and outer race bearing that could be adapted with some slight turning of the axle shaft.


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: Pulling rear axle to stop oil leak
Dusty #1378800 Mon Sep 28 2020 05:23 PM
Joined: Aug 2016
Posts: 80
B
Shop Shark
Thanks for the tip Dusty. I'll look into this if it turns out I have excessive axle wear. Ray

Re: Pulling rear axle to stop oil leak
bucktruck #1378801 Mon Sep 28 2020 05:26 PM
Joined: Aug 2016
Posts: 80
B
Shop Shark
Thanks to everyone...this is good stuff. ray

Re: Pulling rear axle to stop oil leak
bucktruck #1378994 Wed Sep 30 2020 02:00 PM
Joined: Feb 2019
Posts: 836
P
AD Addict
I contacted sales@fusick.com and asked for dimensions and instructions for installation. Here is their response.

The IR1502 inner race is 1 13/16" outer diameter, 1 9/16" inner diameter, 1 3/8" wide. Sorry, no installation instructions for it - it would press onto the axle shaft and work with the C1502 axle bearing.

Their response is contradicting as 1-13/16” (1.8125”) is considerably smaller then the OD (1.876”) of the axles used in our 1/2 ton trucks. They further said it fits a C1502 bearing in which cross references to (Hyatt OR1502), the bearing I’ve removed from my truck.

I responded to the email from “Sales” and asked if they could use a micrometer to measure the OD of the sleeve.

I have done some further research on the sleeve IR1502. Again GM interchangeably at it’s best. IR 1502 (As klhanson suspected is Hyatt IR1502, inner race) turns out that it’s GM part 111122 listed in “1929 - 1954 Chevrolet MASTER PARTS and ACCESSORIES CATALOG” as fitting 37-40 Comm vehicles. It also fits 35-55 Buicks as described on the Fusick Automotive Products website and possibly others. It is mated with GM part 111121 (for those vehicles and years listed). This is further evidenced by an eBay listing and a listing from the Filling Station.

GM part 111121 (Hyatt OR1502) is listed in the Chevrolet master catalog as fitting 40-54 1/2 Ton Trucks. In conclusion, this sleeve should work as a repair sleeve for our 1/2 ton AD trucks.

I ordered two of theses sleeves so my next question/quest is what kind of fit is required to install this sleeve.

Attached Files
FA0CD301-4692-470B-8FF4-7FDF44F0C7FA.jpeg (146.19 KB, 124 downloads)
F64FFAC0-8E10-4355-95E2-F609B651A3E1.png (1007.12 KB, 128 downloads)
4A8FA2D5-B07E-46EE-999F-790BD4A7DF29.png (617.72 KB, 129 downloads)
Last edited by Phak1; Wed Sep 30 2020 02:35 PM.

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Pulling rear axle to stop oil leak
bucktruck #1379004 Wed Sep 30 2020 02:43 PM
Joined: Feb 2004
Posts: 21,017
H
Boltergeist
I'd suggest machining the axle shaft about .0015"-.002" larger that the ID of the repair sleeve and either heating the sleeve for a "drop-on" shrink fit, or pressing it on with a little "Never-Seez" as a pressing lubricant. As long as the sleeve isn't heated enough to turn it a different color, the hardness shouldn't be affected. Be sure to put a slight radius at the axle flange end of the machined area to prevent the formation of a stress riser from a squared-off corner. The sleeve pictured in the ad looks like it's got a chamfer on one end of the ID to accommodate a radiused cut on the axle.
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: Pulling rear axle to stop oil leak
bucktruck #1379024 Wed Sep 30 2020 06:00 PM
Joined: Mar 2002
Posts: 9,030
Master Gabster
I wonder if this very important thread should be put into a tech tip?


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!
Re: Pulling rear axle to stop oil leak
bucktruck #1381110 Sat Oct 17 2020 02:14 AM
Joined: Feb 2019
Posts: 836
P
AD Addict
I finished machining one axle and pressed on the sleeve. I turned the shaft so I would have .0005” to .001” press fit. I chose a light press fit because the finished OD of the sleeve is the same as the finished size of the original shaft and I didn’t want to increase that size too much. I opted for a press fit over a shrink fit as I didn’t want to overheat the sleeve loosing the temper.

The axles are induction hardened under the bearing area, about an inch wide. I have a old Craftsman 12” lathe and although It did do the job, it was too small to do it efficiently. I have an Aloris style tool post and used 3/8” tool bits with replaceable carbide tips, and went thru three inserts (three sides each) before I finally cut thru the hardened area. It was about .150” deep and almost at my target depth. I wasn’t able to cut more than .005” at a time or I destroyed the carbide tip. So consequently, so it was really time consuming.

Before I retired, one of the machines I ran was a 15” South Bend lathe and would have loved to do this job on that lathe. The headstock is much beefier than my Craftsman lathe and I could have run a much heaver tool and much heaver cut.

I’m optimistic that this sleeve will work, but the sleeve was barely long enough to cover the area that both the bearing and the grease seal area the ride on, making locating the sleeve difficult. I’m pretty sure I have the location correct, but I won’t be sure until I reinstall the axles.

Here are the before and after pictures. If this works, I’ll document all I did and submit it for a Tech Tip.

Attached Files

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Pulling rear axle to stop oil leak
bucktruck #1381111 Sat Oct 17 2020 02:24 AM
Joined: Feb 2001
Posts: 1,134
D
Shop Shark
Nicely done phak1 , I just received 4 of those bearing sleeves in the mail . Going to do 2 axles and put 2 into stock. smile

edit ; if you don't have a bearing warmer , you could heat some oil in a pot on the stove (in yer shed) to about 80deg C , that will not damage the bearing in any way and gives a significant size change (0.003 - 0.004) special oil for this is also available (less inclined to burn smile )

Last edited by Dusty; Sat Oct 17 2020 02:28 AM.
Re: Pulling rear axle to stop oil leak
bucktruck #1381113 Sat Oct 17 2020 02:55 AM
Joined: Feb 2004
Posts: 21,017
H
Boltergeist
Looking good! BTW, I have that same Craftsman lathe, and it's done some pretty amazing work for me, including spinning a 235 crankshaft so I could turn a little over 1/2" off the diameter of the counterweights for piston skirt clearance on the stroker engine I'm building. The trick is to bolt a heavy tool bit directly to the compound, without any sort of tool holder, and use shims to set the cutting tool height. I'm using a piece of 1" square key stock as a tool holder, with a 3/4" triangular carbide bit bolted to it. The whole works is held onto the compound with a couple of 1/2-13 bolts threaded into T slot nuts. I've also made a couple of modifications to the carriage to prevent any flexing during heavy cuts.

I've got a South Bend 13" lathe and a Bridgeport mill in storage, waiting to be installed in the shop once the floor plan gets changed around a little.
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!
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