2nevets

1938 desoto brakes issues

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19 hours ago, hchris said:

Have you centralised the shoes ?

 

Chrysler/Dodge/Plymouth brakes require that you get the shoes concentric in the drum before anything else, it's complicated if you don't have the right tool, plenty written up about it.

If needed and always is on a quality brake job  reline and new hydraulics..

Reline the shoes using lining material...... .180"thickness up to .030" oversize drums.......   .200" for up to .060" over size drums ( too thick of lining on .030" and under drums and you won't get the drum on!

The shoes have to fit even to the drum or the shoes twist....low pedal!

Arc each set (2) of shoes to fit match each drum...find someone to do it... a big truck shop or brake rebuilder. Do this step!

Move the shoes up/down to center them in the drum using the lower anchor bolts  ....and them adjust them outward to lightly rub the drums for the last adjustment ( 1-1/16" hex bolt)  in the middle of the backing plate. one for each shoe.

READ your factory shop manual !!!

Pictures showing arcing of MoPar shoes and doing a major adjustments with the ammco 1750 and the miller factory tool set.... pictures showing shoes that the linings don't match the drum at all.

Also the tools to do the job quickly and correctly. But not available.

Others can chime in on other cheater ways to get the shoes to fit the drums enough for wear in.

 

Miller MT-19 Brake Gauge C49 Chrysler Brakes (23).JPG

Daly 1508 37 Packard front brake shoe arc job (29).JPG

Ammco 1750 Checking Shoe Clearance Location.JPG

Miller MT-19 Brake Gauge C49 Chrysler Brakes (26).JPG

Daly 1508 37 Packard front brake shoe arc job (16).JPG

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Plenty of home made cheap and effetive centralising tools  out there, do a search.

 

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8 hours ago, hchris said:

Plenty of home made cheap and effetive centralising tools  out there, do a search.

 

Here is an idea....

BrakeAdjustingContraption.thumb.jpg.86590efab7e04d76c0d7ea0875476dce.jpg

Edited by keiser31 (see edit history)

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Put the new cylinders on and all is good
I cant believe I would have defective cylinders

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