|08-02-2019 05:13 AM|
I know as a kid long before I could drive, one time doing mopar brakes which had this stupid little rivet like metal piece that gets hammered in one shoe, I put it on the wrong one and left it that way. So the smaller lining had to go to the rear. When the next inspection came my Mom told me that the car needed rear brakes, only because the last set on one side was put on backwards. So it made a big difference in wear.
Remember when brake shoes had a core charge?
|08-01-2019 06:43 PM|
This rotation is how the self adjusters work.
Yes, the wheel cylinder is double-acting, but the pressure inside is the same on both pins, and the added friction force rotating the shoe assembly around pushes back against that rear pin.
I'll ask again: since GM pinches every penny possible, why would they go to the expense of having to stock two different shoes for primary and secondary if a single common shoe would work?
To the OP, since I missed this in your first post originally, I don't know what you're reading, but the shoe with the SMALLER lining is the PRIMARY shoe and goes to the front.
|08-01-2019 04:49 PM|
Semi brakes use the same size shoes in all there drums.
Most wheel cylinders are double acting.
|08-01-2019 03:05 PM|
|08-01-2019 02:21 PM|
It only matters if you have and are using a parking break. In that case the cable is routed in the front or rear of the drum. The cable pulls on the parking brake which piviots on a point increasing leverage.
It has been almost 50 years.
Someone could have installed a diffrent axle or backing plate that requires the smaller one on that side.
Other then interference or some aftermarket thing requiring special pads it does not make a diffrence what way they are mounted.
Also. Buy a all in one brake tool. You can do the job with screwdrivers snd wrenches. But that $10 or so tool is worth every penny.
|08-01-2019 01:24 PM|
|joe_padavano||The shoe with the shorter lining is the primary and goes towards the front. Longer lining towards the back.|
|08-01-2019 01:10 PM|
rear drum brake shoe orientation
I'm installing a new rear on my 70 GTO and swapping the brakes over, standard 9 1/2" drums. The service manual says the primary (bigger) brake shoe goes toward the front, but the current set up on the old brakes has them toward the rear. Can someone confirm for me where the bigger brake shoe is supposed to go?