Brake adjustment

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Chazbee
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Brake adjustment

Postby Chazbee » Tue Sep 18, 2018 2:33 pm

I have run out of adjustment on my front brakes while still having plenty of material left on the shoes - a common occurrence it would seem! While being aware of the larger adjusters available I wondered if a cheaper solution would be to put a thin shim between the metal piston and sealing rubber in the wheel cylinders - a suitable sized coin perhaps. It may be necessary to remove them when fitting new shoes but are there any other problems? Has anyone tried this?

Chazbee
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Re: Brake adjustment

Postby Chazbee » Thu Sep 20, 2018 3:27 pm

As a follow up to previous post - I have fitted a set of new shoes which has sorted the problem for now! During the fitting process I decided to remove the cylinder pistons to clean and lubricate them and to my surprise one of the cylinders was different to the others in that it had a piston with a groove and seal fitted rather than the separate piston and seal in the others. The odd one out looked the same externally and while I did'nt measure the piston, it must be the same as the car pulls up strongly and straight. Were there two types of cylinder available?
Another fix for the lack of adjustment occurred to me while working on the brakes - weld a shim on to the base of the mask!!

shoebone
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Re: Brake adjustment

Postby shoebone » Thu Sep 20, 2018 5:15 pm

Cylinder differences are probably due to different manufacturer, providing it is the same size as the others it shouldn't be a problem, just a bit unusual ... I would tend to fit a complete set of four and expect when I buy four that they are all the same .... probably doesn't matter. Your other problem, temporarily resolved .... you may run out of adjustment later and be where you were earlier, I would get the larger adjusters, what are they ... 12 quid so not hugely expensive. Welding bits on and shimming here and there may work but not recommended. I recently helped a friend with front brakes on his minor and all sorts of "shims" fell all over the floor as we dismantled his brakes, one "shim" was worn where it had tried to escape and ended up wearing on the drum surface ... bad practice.

ManyMinors
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Re: Brake adjustment

Postby ManyMinors » Thu Sep 20, 2018 6:11 pm

The cheap "pattern" aftermarket cylinders have a seal on the piston. The original Lockheed ones do not. I have had a bad experience with new pattern cylinders leaking and would not recommend buying them. Once is certainly enough for me. The situation is confused by sellers boxing these cheap pattern parts in boxes labelled "Borg & Beck" and "Unipart" which once meant good OE quality but doesn't any more.

King Kenny
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Re: Brake adjustment

Postby King Kenny » Thu Sep 20, 2018 8:45 pm

Strictly, it is bad practice but I have done this for a number of years on my rear brakes for the reason you point out. The front brakes have been converted to disks. I have never had any problems.

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Nickol
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Re: Brake adjustment

Postby Nickol » Wed May 01, 2019 3:38 pm

I was thinking about posting a new thread but checked the Forum first - my Problem it seems is not new.

The rear Brakes on my 69 Traveller also have run out of adjustment. I thought that the existing adjusters were simply worn but on Fitting new ones, there is no Change. The shoes are mintex and hardly worn. I have a new spare brake drum so I installed that temporarily to see if it made a difference. It did not.

The rear brake cylinders are indeed after market - could that be the cause?
Gott schütze mich vorm Sturm und Wind und Autos, die aus England sind.
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paul 300358
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Re: Brake adjustment

Postby paul 300358 » Wed May 01, 2019 6:08 pm

My rear adjusters are fully adjusted out and just about move the brake shoes into the correct position. I'm thinking that the shoes will get a dab of tig weld when they need further adjustment.

simmitc
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Re: Brake adjustment

Postby simmitc » Wed May 01, 2019 9:11 pm

There are different size adjusters (snail cams) that vary between cars but can look very similar. It's unlikely, but just possible, that yours are the wroing ones, biot the old and the new - not all suppliers know what they are selling!.

Monty-4
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Re: Brake adjustment

Postby Monty-4 » Thu May 02, 2019 10:36 am

On the topic of oversize snail cams - I see ESM do a version that they state requires the drum to be skimmed.

I wonder if these might solve my problem of running out of adjustment with the Wolseley 1500 brakes?
68' 4-door Saloon, another 'Monty'.

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Nickol
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Re: Brake adjustment

Postby Nickol » Thu May 02, 2019 11:54 am

I will today try to weld/braze a distance Piece to the underside of the old adjusters I recently replaced. Probably 4 to 5mm will suffice I surmise and see what that does.

When the shoes are not properly adjusted, the handbrake Needs excessive travel to work properly so I am looking to cure this.
Gott schütze mich vorm Sturm und Wind und Autos, die aus England sind.
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simmitc
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Re: Brake adjustment

Postby simmitc » Thu May 02, 2019 2:03 pm

I'm sure you know, but for the benefit of others, the handbrake cable length can be adjusted using the nuts inside the car, and this can eliminate slack; BUT it should be done only when the shoes have been correctly adjusted in the first place - the cable must have some free play when adjusting the brakes. The lever should give 4-5 clicks before the handbrake is fully on.

philthehill
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Re: Brake adjustment

Postby philthehill » Thu May 02, 2019 3:24 pm

I would suggest that if you have got to fit a spacer of 4mm - 5mm thickness then there is something seriously wrong with the set up.


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Nickol
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Re: Brake adjustment

Postby Nickol » Thu May 02, 2019 5:09 pm

This occured to me later as well.

I have brazed a ca. 2,5 mm steel Piece on to the underside of the adjuster. Now it works really well. A few clicks starting from Zero and the brake drum is locked. Release one click and it turns freely.

Now for the handbrake.....
Gott schütze mich vorm Sturm und Wind und Autos, die aus England sind.
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