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Old 06-12-2020, 08:30 AM   #41
bavArian
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Default Re: Can't separate axle shaft from carrier

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Originally Posted by john charlton View Post
The part I sent you had the correct part number on it so I assumed it was correct . My mistake I should have tried a ring gear on it before I went to the post office !!! So your good part is the same as the part I sent you I suppose . Just confirm you need the side which takes the ring gear and has male "pegs" I will mail you another one if that is the case no postage charge !!!



Hello John,


yes, the good part and your part are identical, apart from the part number.

Honestly, I wouldn't have thought to check the part before sending it out either, because how probable is it to get an altered carrier with the right number on it.
In Tom's article in the 2nd picture the right part is the correct one, with the 4 1/8 inch shoulder for the ring gear and the male pegs for centering.

I'll check your pics with my worn out part to make sure that it's the right part.
Can someone tell us if A and B used the same parts for the diff carrier?
Thanks and have a nice day,


Daniel
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Old 06-12-2020, 11:59 AM   #42
Jim Brierley
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Default Re: Can't separate axle shaft from carrier

Use 3 feeler gauges, spaced evenly around the housing.
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Old 06-12-2020, 02:26 PM   #43
Tom Endy
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Default Re: Can't separate axle shaft from carrier

The attached article may be of additional help.

Tom Endy
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File Type: pdf 4-5-Carrier Repair.pdf (537.5 KB, 11 views)
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Old 06-12-2020, 06:34 PM   #44
bavArian
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Default Re: Can't separate axle shaft from carrier

Thanks for the article. I can't imagine how much time ends you must have spent working on Model A's in your life so far. :P


It may be a dumb idea and proven to not work, but if one has a diff carrier with excessive wear from the spider gears wouldn't it be possible to use or fabricate a shim to compensate for the wear? Much like the shims for being able to set the preload on the diff if the race is pressed in too far. I think that would be an option if no new or usable diff carrier can be found.

In the US, you could just get another diff carrier of course but I would imagine that they're quite rare in Europe or Australia.
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Old 06-13-2020, 12:35 PM   #45
Jim Brierley
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Default Re: Can't separate axle shaft from carrier

Any shims should be quite thick, or they would be ground into dust in a hurry. The spider gears only turn when the vehicle is in a turn, so shimming is not usually necessary, and they cause no noise.
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Old 06-13-2020, 02:00 PM   #46
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Default Re: Can't separate axle shaft from carrier

At least my old diff carrier is quite soft steel, or else I wouldn't have been able to machine it on my turning machine. If one used proper steel, lasercut the shims and surface-treated them they should last at least as long as the original diff carrier, especially as no one would abuse the diff like the farmers in the past with their belt-driven machines.
Of course, as long as good used carriers are available that won't be done because it's just not economic.
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Old 06-28-2020, 11:40 AM   #47
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Default Re: Can't separate axle shaft from carrier

*an eternity later*


So I finally got around to work on the A yesterday. We spent the entire day setting up the rear end with the 2nd carrier half that John sent me (again MASSIVE THANKS to John!) and getting the rear end under the car.
There are still a few smaller things to be done (tightening up the u-joint housing halves, mounting 1 shock, reattaching all brake rods) but apart from that the rear end should be good to go now.


Thanks for the help guys!
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Old Yesterday, 09:05 AM   #48
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Default Re: Can't separate axle shaft from carrier

Well, there *might* be a new problem. When assembling the rear drums on the new axles I get a scratching sound when turning the drum. It seems that the brake shoe rubs somewhere on the drum. Is that normal and not a big problem or do I need to take the brake assembly apart? I can still turn the drums by hand but there is a notable drag.


Edit: The drag is higher if I turn the drum backwards, if that is important.
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Old Yesterday, 09:54 AM   #49
Big hammer
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Default Re: Can't separate axle shaft from carrier

* might* have a problem, yes! It sounds like the brake shoes are not centered. Suppliers sell a brake shoe centering tool, check the tool out online for you to get ideas on how to center the shoes.
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Old Yesterday, 11:07 AM   #50
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Default Re: Can't separate axle shaft from carrier

Just a thought adjust the brakes hard up on the adjuster then back fully off and try again . This could centralise the shoes maybe not but worth a try . Could be with the new axle shafts the drums have gone on a bit further and the drum is rubbing on the backplate , If so it can be fixed by fitting an axle shim something I dont really like as I think it upsets the hub axle bond . I know people have done many thousands of miles with no problems . If the drum is only just touching I grind a smidgeon off the drum edge .Yank the emergency brake on and off see if that helps .

John in cloudy windy Suffolk County England .
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Old Yesterday, 03:25 PM   #51
bavArian
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Default Re: Can't separate axle shaft from carrier

I have axle shims, but when I use them there's no way I'll get the cotter pin inserted if I also use the axle shim between hub and nut. It seems that the drum is not rubbing on the backplate, so I'd like to go without the shims.



Honestly I doubt that centering the shoes with the drum like that works, but I'll give it a try.

If it doesn't work I'll probably just drive to the local hardware store tomorrow and get some materials to build a centering tool.
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Old Yesterday, 08:04 PM   #52
Benson
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Default Re: Can't separate axle shaft from carrier

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Originally Posted by bavArian View Post
I have axle shims, but when I use them there's no way I'll get the cotter pin inserted if I also use the axle shim between hub and nut. It seems that the drum is not rubbing on the backplate, so I'd like to go without the shims.



Honestly I doubt that centering the shoes with the drum like that works, but I'll give it a try.

If it doesn't work I'll probably just drive to the local hardware store tomorrow and get some materials to build a centering tool.
bavArian,

I hope that my German by the way of Google... is better than my Vietnamese and Hmong were in 1968!



NOTE: That it is a common problem for the Parking brake band to be installed backwards (also known in the US Army as BASS ACKWARDS).

If so the EDGE of parking band will rub on the inside of brake drum. Because brake band is twisted ... and not seating squarely to backing plate because band is installed backwards.

You should be able to see paint rubbed (scraped) off the EDGE of the band in a few places

(that is: scrape ... no scrape ... scrape ... no scrape and so on) and also scrapes will be "all the way around" on brake drum.

That is: scrape will be right next to the 90 degree angle where EDGE of parking band comes up to the surface where band lining rubs on the drum.

1. Pull the noisy brake drum.

2. leave everything as is.

3. Look at photos I sent.

4. the yellow "IN" (photo one) refers to the part of band that should be installed towards the differential "pumpkin".

5. The yellow "out"(photo two) refers to the part of band that should be installed "OUT" or towards you as you look at backing plate.

6. Look at first photo that is the "OUT" photo with four yellow marks around outside of the band.

So if you look at the parking brake band and it is incorrectly installed you will see that all four pads with yellow marks in as photo two are same distance from the edge of outside edge of band (that is: "toward You").

OR : If band is installed correctly two of the "pads" should be one distance and the other two about twice as far from the edge.

Sooo ... If all four "pads" are the same distance from edge then band is
BASS ACKWARDS!

Photos 3 and 4 are details of the two sides and the END of the band ...

Photo 4 shows that first pad from the left is the same distance from the edge as the pad to the right in photo.

Remember the side of the band that is equal distance goes toward the pumpkin.
Attached Images
File Type: jpg tn_Brake parking band out SIDE.jpg (126.7 KB, 10 views)
File Type: jpg tn_Brake parking band-IN side.jpg (72.6 KB, 7 views)
File Type: jpg tn_Brake parking band out detail.jpg (28.5 KB, 8 views)
File Type: jpg tn_Brake parking band IN detail.jpg (67.5 KB, 8 views)
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In Memory of the KIAs and 29 WIAs on CH-54 Tail Number 67-18414 which crashed at The "Golf Course" at An Khe Sept 27th, 1968. RIP

Last edited by Benson; Today at 08:16 AM. Reason: This is a WORK IN PROGRESS for a while here
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