2525 Brake squeal

[KiwiBuickNut]

Hi All,

I have a 2525 standard 6 and its a wonderful car and I've been lucky with quiet brakes for ages but finally the pedal started to get down a bit so I needed to do some adjustment. I followed the manual on this and have a fair bit of vintage experience but now I've got a squealer !

Having trouble figuring out exactly which wheel is causing the noise and its only on the light load as you finally pull up to a stop, fine under heavy braking or at speed.

I'm sure ive got a little too much lead or trail on one shoe but struggling to find it.

Anyone got any tips or tricks to share?

 

Many Thanks

 

Steve

[Morgan Wright]

Tell us what tires you have. Skinny tires, squeal is normal since only a little slip of rubber meets the road. Wider tires shouldn't squeal.

[KiwiBuickNut]

Thanks Morgan,

Its not the tyres that are squealing its the brakes! FYI running 600-22 tyres.

[dibarlaw]

Steve:

Glad to see you are on the forum! We need accounts of your adventures with your 1925.

 After nearly 10 years of ownership and constant fighting with my 25-25 I have finally been able to take some longer trips. Stll even after new radiator, clutch, engine rebuild and on and on there always seems to be another issue to sideline us.

 At the AACA museum cruise-in after 68 mile drive. It would not start! It "took the Village" to raise it into cooperating for the trip back home. But nearly 140 miles round trip and running for over 2 1/2 hours continuously each way we are making progress.

[Hubert_25-25]

Steve, 

    I do not know if you have all these publications and if they will help your situation.   Maybe one of these has some insight to the problem.   Some if these are from different years with slight changes, but the concepts should get you there.  

Since it is occurring only on light load, start by pulling the clevis pin to the front or back brakes.  Then you can do the same to the left or right side.  That should help you isolate the wheel.  Jack up that wheel.  Pull the clevis pin on the brake lever arm.  The part that looks like a big question mark (how appropriate).  This will allow you to put light pressure on the brake while the wheel is rotated and you should be able to isolate the source.   

Hoping to resolve what ails your stopping and Larry's going.   

Hugh

 

Edited July 21, 2021 by Hubert_25-25 (see edit history)

[KiwiBuickNut]

On 7/22/2021 at 12:37 AM, Hubert_25-25 said:

Steve, 

    I do not know if you have all these publications and if they will help your situation.   Maybe one of these has some insight to the problem.   Some if these are from different years with slight changes, but the concepts should get you there.  

Since it is occurring only on light load, start by pulling the clevis pin to the front or back brakes.  Then you can do the same to the left or right side.  That should help you isolate the wheel.  Jack up that wheel.  Pull the clevis pin on the brake lever arm.  The part that looks like a big question mark (how appropriate).  This will allow you to put light pressure on the brake while the wheel is rotated and you should be able to isolate the source.   

Hoping to resolve what ails your stopping and Larry's going.   

Hugh

 

 

Wow many thanks, I have the original Buick manual but these other articles are very helpful, I will have a play this weekend and let you know how I get on.

[Mark Shaw]

If the ends of the shoes contact the drum first, they will squeal.  So, the first thing I would try is to bevel the ends of the brake material and verify the brake material is not out of round.