Brakes locking on

boguing · May 14, 2022

I'm afraid that you may have run into a problem that I've heard about but not seen myself.

When I rebuilt my SIII Lightweight two of the drums were nearing their wear limits, and the other two weren't particularly round either. No big deal, buy some more. Now that's where it got interesting. Two of the suppliers I use (and trust) gave me the same story. Whoever it is/are that make new drums is making such a bad job of machining them that they won't stock them any longer - they were getting so many back. You'd think it wouldn't be a hard job, but these people just don't seem to understand how it should be done.

Long and short I skimmed my worn ones, yes they're fractionally over the limit, but they work beautifully.

Take yours to someone who's good with a big lathe and have him check them and correct if necessary.

cotterpin · May 14, 2022

steve2286w said:
Have you compared new shoes with old, have you got problems on all 4 drums, chamfering ends of shoes can help, do shoes match the radius of the drums you need to take them off and sit them inside drum to check this
Perhaps post a few pics without drums on

Th

steve2286w said:
Have you compared new shoes with old, have you got problems on all 4 drums, chamfering ends of shoes can help, do shoes match the radius of the drums you need to take them off and sit them inside drum to check this
Perhaps post a few pics without drums on

The shoes were contaminated with oil and thrown away years ago. Problem is on all 4 drums, 2 are new 2 are original. They do seem the same radius drums and shoes.

cotterpin · May 14, 2022

boguing said:
I'm afraid that you may have run into a problem that I've heard about but not seen myself.

When I rebuilt my SIII Lightweight two of the drums were nearing their wear limits, and the other two weren't particularly round either. No big deal, buy some more. Now that's where it got interesting. Two of the suppliers I use (and trust) gave me the same story. Whoever it is/are that make new drums is making such a bad job of machining them that they won't stock them any longer - they were getting so many back. You'd think it wouldn't be a hard job, but these people just don't seem to understand how it should be done.

Long and short I skimmed my worn ones, yes they're fractionally over the limit, but they work beautifully.

Take yours to someone who's good with a big lathe and have him check them and correct if necessary.

Colthebrummie said:
Have you tried not fitting the drum retaining screws, they dont do much anyway.

Col

It does it with the screws in or out as soon as you tighten the wheel nuts.

Turboman · May 14, 2022

cotterpin said:
It does it with the screws in or out as soon as you tighten the wheel nuts.

I think that is warped drums.

You could skim them as suggested, or get another set.

cotterpin · May 14, 2022

Turboman said:
I think that is warped drums.

You could skim them as suggested, or get another set.

2 of the drums are brand new never been used and the other 2 are original

boguing · May 14, 2022

Other suggestions then (but honestly I'd get them all measured anyway) is to ask whether the mating surfaces of both drum and hub are clean bare metal? Even paint can throw them off alignment.

If there's nothing wrong with the drums or their seating (and hence alignment) then the fault must be in the shoes. I'll say I'm surprised that with the adjusters right off you have a problem, so I do question the size of the shoes. But... if the shoes are right then it's the way they're sitting that needs work. Have you tried stamping on the pedal when the drum screws are loose? That helps the shoes both get 'upright' if they're hanging off outwards. and wobble around on the cylinder seats to get the surfaces concentric with the drum. It can take quite a few stamps...

Colthebrummie · May 14, 2022

Do the brakes lock on on all four wheels? If not, try swaping the drums around. Where the new drums from Britpart?

Col

Shippers · May 14, 2022

Take a pic of your brake shoe set up and upload...something is not right with your set up...just done a 59 S2...

Turboman · May 14, 2022

cotterpin said:
2 of the drums are brand new never been used and the other 2 are original

New parts can be warped too.

Turboman · May 14, 2022

Shippers said:
Take a pic of your brake shoe set up and upload...something is not right with your set up...just done a 59 S2...View attachment 265059

Good point. People often try and put the top spring right across the two shoes, instead of on the post.

Shippers · May 14, 2022

Turboman said:
Good point. People often try and put the top spring right across the two shoes, instead of on the post.

Yes...and you can also put backplates on the wrong side as well...

lynall · May 14, 2022

Shippers said:
The 59 I'm working on has them...

I would call a 59 an early car, in fact any s2 is an early car in my mind, 2a onwards things get different.

steve2286w · May 14, 2022

Decent shoes sorted same problem here:
https://www.landyzone.co.uk/land-rover/quick-brake-shoe-question.297154/

cotterpin · May 16, 2022

Shippers said:
Take a pic of your brake shoe set up and upload...something is not right with your set up...just done a 59 S2...View attachment 265059

Thanks for the photo. It's difficult getting a photo with the hub in position as it covers everything up. But looking at your set up It is exactly the same as mine and as shown in the manual and the several videos on you tube, Spring and adjuster bottom retaining plates etc, the same. I think the problem is the shoes. Will have another look today.

Brakes locking on

boguing

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