So been trying to figure out this front brake problem I’ve been having,maybe somebody can shed some light on the problem. End of last season I changed the Brake shoes, springs, cylinders . Brake hoses, adjusters. And had the drums cut at a machine shop. Using good quality parts Raybestos Bonded shoes, bendix cylinders & Hoses.Centric springs and all seemed well, till the front end started shaking when braking at speeds over 40mph. Or coming off the expressway THAT WAS ROUND ONE.....
So the drums were not getting hot, or dragging,it seems I had them adjusted correct , I have one of those tools that measures the drum and shoes,it works very well. I took the drums to the machine shop and had them skinned again and I changed the brake shoes to a Rivited type of brake shoe all went together nicely.I also checked the front end, tie rod ends ,ball joints etc. all is good. Also took the front wheels in to get re-balanced .bought new tires last year . STILL having the same problem ..... anybody got any ideas ?
What brand of rivited brake shoes did you install the second time you replaced them .
Centric brand, rivited type . Tried to locate Raybestos most of their type is bonded.
Do the shoes come in different sizes? I'd have to look into the books, but there is a primary and secondary shoe.
“The fat girl rides in the back “, that’s how I remember how the shoes go on. The larger shoe is on the back.
I checked the book and there is a primary shoe and secondary shoe. be sure you have them on correctly. I believe the bigger shoe goes onto the back.
I tried the Raybestos # 127PG bonded. Then I switched to Centric #11204190 riveted type.
The Drums were machined each time
I had the same problem when trying to replace my brake shoes. I spoke to an "old timer" who said he would have to "stretch" the brake shoes to get them to fit properly. He told me the shaking was caused by the shoes not fully seating on the drums, connecting only at the top or bottom, when the brakes were applied. The "stretching" consisted of putting the shoes into a press to have them fit the profile of drums better. I haven't tried this method but take a look at the brake shoes to see to if there is any wear at the point they connected with the drums at the top or bottom.
Since I didn't "stretch" my brake shoes I ended up putting the old shoes back in temporarily until I could try brake from another manufacture to see if the shoes are a better fit.
Sounds like I’m in the same boat as you Bob, I’ didn’t save the old shoes threw them out when I did the first brake job.
I did have exactly the same problem the only time i had a shop do my brakes on my 64
I do brakes on my own cars for 50 years
My problem was the brand brake shoes the shop used
The friction material was inferior and the heat of our large drum brakes caused the brake shoes to glaze ( shoes get shinny and do not grip ) and crack from the heat production
The car would shake real bad from about 30 MPH down to a stop
I mean real bad --like the front of the car was going to fall off
That was the way ---they gave me back the car and i was fit to be tied ( after spending $5,000 dollars to bring the car back mechanically front to back )
As the brake shoes were new --that was the last thing i thought would be the problem
Like you i checked and replaced --all other brake parts that were suspect with no solution
I then went to a new set of Raybestos brake shoes as I was out of ideas
The brand i have used all my life-- and that was the solution to my own problem
Raybestos brake shoes are cut for the drums ( unlike other brands ) when you receive them with a superior friction material --so not sure why they would need to be cut again
Back in the day it was standard procedure for the auto stores shop ( they all had one ) to cut the drums and the brakes shoes to fit them
Are you cutting the old drums or installing new ones ?
If cutting the old ones there is a limit on how much they can be cut which the shop cutting the drums --should be looking out for
Cutting them too much might cause them to flex when they should not be doing that which is just my best guess ( at this point )
i am Having a problem with this as you already have used the Raybestos brake shoes --and stiil having this very very nasty problem
Do be sure not to get any grease on the brake shoe contact surfaces
Alcohol is good to remove that
I really want to know the solution to your problem myself !!
Do be sure to give any shop working on our cars - the Service Manual for your year car So they have the cars specs in front of them
That Might Help ! -- if they can READ ---LOL !!!
I think the old timer was referring to cutting the brake shoes -when he said to stretch them
I have never heard the term --stretching the brake shoes before this