Help with Sure Stop brakes and 1927 axle shims.

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Model T Ford Forum: Forum 2015: Help with Sure Stop brakes and 1927 axle shims.
Top of pagePrevious messageNext messageBottom of page Link to this message  By Alby Anderson on Monday, July 13, 2015 - 02:48 pm:

I have finished the frame, motor, transmission and radiator on my 1927 Coupe. I am now installing Sure-Stop brakes on the rear axle.

1) When I tighten the axle nut the wheel is locked up. I am not trying to reach a certain torque; I am just tightening with a drive socket. I think the problem is related to wear on the axle. The following picture shows how far the drum extends over the mounting plate when the nut is tightened. I am planning to use shims. I would like to put off rebuilding the rear axle until I can afford to install a floating bearing. I would appreciate any thoughts on this theory.

2) I believe the axle key was installed improperly. Am I correct that the square end should face the threads and the taper end should be facing the car with the taper facing down? The second photo shows the current installation. I have ordered new keys form Langs

Thanks for any help.

Alby Anderson
Drum OverlapAxle Key


Top of pagePrevious messageNext messageBottom of page Link to this message  By William Devine on Monday, July 13, 2015 - 04:27 pm:

Alby,
I sent you a PM.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Walker, NW AR on Monday, July 13, 2015 - 05:04 pm:

Alby -- The drum should not extend in past the backing plate. Either your axle or your hub is worn, or both are. The vendors sell shims, but they are too thin for your application. Order one of those to use as a pattern to make your own thicker ones from soup cans or similar material. Don't use multiple thin ones; they won't last any time if you do.

Yes, the axle key is upside-down and backwards. The rounded end of it should fit into the rounded end of the keyway.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Dewey, N. California on Monday, July 13, 2015 - 05:17 pm:

In answer to question 2, axle key is upside-down and backwards. From the looks of things, no one has been inside that rear axle in a long time. Better open it up and inspect, and change out the babbit thrust washers NOW!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Alby Anderson on Tuesday, July 14, 2015 - 09:23 am:

Can the thrust washer be changed with out taking the differential apart?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Todd, ............Red Deer, Alberta on Tuesday, July 14, 2015 - 10:31 am:

Here's a pattern for the shim. You may have to resize it for fit.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Todd, ............Red Deer, Alberta on Tuesday, July 14, 2015 - 10:34 am:

"Can the thrust washer be changed with out taking the differential apart?"

Yes, but you still have to dis-assemble the housings to get the differential/axles assembly out to replace the thrust washers.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Doug Wilson - Omaha NE on Tuesday, July 14, 2015 - 10:35 am:

No the entire rear axle has t be taken apart to replace the thrust washers. Get a copy of Glen Chaffin's instructions on how to do it. The instructions scared me, it really sounds complicated, but it really is not that bad a job to do, it just takes time to get it correct


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Walker, NW AR on Tuesday, July 14, 2015 - 10:58 am:

Just to clarify, "Glen Chaffin's instructions" are contained in the MTFCA Rear End rebuilding book, available from this site or any of the T parts vendors. Alby, I highly recommend that you get a copy before redoing your car's rear end. You'll be glad you did.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Alby Anderson on Wednesday, July 15, 2015 - 07:28 am:

Thanks

I will get a copy of the book


Top of pagePrevious messageNext messageBottom of page Link to this message  By Glen Chaffin on Thursday, July 16, 2015 - 03:23 pm:

Happy to be of help, Good luck in your project. Any questions just call 951-735-4791


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Conte on Thursday, July 16, 2015 - 03:53 pm:

Lang's has a new item 0.017 shims along with 0.005

https://www.modeltford.com/item/2505SHB.aspx


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