Help Needed reference picture on R3500 dually brakes
 

I took a ton of pictures before I disassembled the brakes with a small digital camera I keep in my tool box(.....but I'm screwed....)

Fast forward 2+ months, everything has been sandblasted and painted or powder coated. I bought a ton of AC Delco bearings, seals and brake parts. Time to reassemble...I went to pull up the files on the computer and they are unreadable. Now I cannot find the original SD card to recover the files from. :devil: I do have software where I can recover from formatted media on the cards

I have a GM 10.5" 14 bolt DRW off 1989 GMC R3500 C&C. It was a former telephone company bucket truck. I got it without the aerial lift to uses as a work truck. The frame went soft so it got parted out. I'm using the 1989 running gear under my 1966 GMC 1 ton truck. The old Eaton rear is shot and parts are near impossible to find.

Both brake drum backing plates are the same. The passenger's side cable came out to the rear, was secured to the brake line bracket then went to the equalizer on the drivers side. This looked factory and not a backyard hack job.

If the Passenger's side backing plate is incorrect....can I just redrill the plate for the parking brake cable facing forward?

The moderator Hatzie had some great GM reference books and manuals he scanned, but I cannot find the diagrams that show what I'm looking for.

Re: Help Needed reference picture on R3500 dually brakes
 

When you say cable, I assume your referring to e brake...both of mine (81), are on the front side of the backing plate...and there is a large stamped dimple for the cable to pass thru..

Re: Help Needed reference picture on R3500 dually brakes
 

Thank you..

Is yours a DRW?

It looks like I have two left (driver's side) backing plates. One is definitely stamped Bendix 3207587-L (left)

My previous drum brake experience was a long time ago. I believe the automatic adjusters are on the trailing shoe (rear most)??

Re: Help Needed reference picture on R3500 dually brakes
 

I did find a post that said later model ones came with two lefts

"I've swapped them side to side before and just drilled out the hole. The later models for a couple of years used the same plate and had the entire parking brake cable assy come up the left side of the frame using a real long cable for the right hand side"

Re: Help Needed reference picture on R3500 dually brakes
 

Do any drawings here help out at all?

https://www.wholesalegmpartsonline.c...500-parts.html

Re: Help Needed reference picture on R3500 dually brakes
 

Thank you.

It helps, I saved the diagrams just to be sure.

Re: Help Needed reference picture on R3500 dually brakes
 

I'm kind of thinking that the emergency/parking brake should work in it's current configuration.

Kipps where in Northern Virginia are you? I grew up in Fairfax near what became the Fair Oaks mall area. Fair Oaks was a golf course when I moved there.

Re: Help Needed reference picture on R3500 dually brakes
 

I'm not that far north. I'm in Madison County, halfway between Culpeper and Charlottesville.

Re: Help Needed reference picture on R3500 dually brakes
 

Wc.., mine is a 81 C30 c&c dual rears...

Re: Help Needed reference picture on R3500 dually brakes
 

Thank you