Front brake backing plate

Wow...those surely "POP!!" lol
B.W.

Wow, those look great, its hard to beleive their the same ones.. I didnt include all the pictures I took before sending them..

Like the one with the dead spider..



You know, now I kinda miss them..

Can I have em back?

Here's a shot of the backing plate plus anchor bolt out of van:

Some shots of the guide plate:









In this last photo you can see the little nubbins where the guide plate was once welded to the backing plate. There are little depressions in the backing plate that match the nubbins. The two dowel pins are quite damaged. One is missing completely the other one sheared off.

I figure the "nubbins" might have been dowel pins that were either spot or friction welded to the backing plate, and the guide plate was mated to them, and finally the other dowel pins were inserted in the through holes in both plates. I'm guessing the friction welding process didn't yield a strong enough weld, so it failed leading to the failure of the other pins.

The main forces involved are simply the braking forces: the wheel cylinder forces both shoes apart at the toes, with the front shoe forcing its heel into the adjusting rod which in turn is forced into the heel of the rear shoe. The rotation of the drum must be swiveling both shoes so that the rear shoe's toe hits the anchor plate with a fair amount of force - enough to break the pins, warp the guide plate, and fracture the backing plate. At least that how I figure it's all happening.

In any case, the engineering and/or manufacturing was insufficient to prevent what could have been catastrophic brake failure leading the assymetrical brake lockup and an out of control vehicle.