R112 Brake Adjustment

So I have a KB Truck Service manual but not one for the R112. I found an R series manual online but it is for the larger R series trucks. I have a real simple question. Is the only adjustment for the brakes on the R112 just the lower sprocket adjuster? There is a large nut on the top of the backing plate but it just seems like it holds the top round pivot point and does not have sort of adjustment.

Thank You!

Mike

That stud can be moved up or down to adjust the effective center of the brake shoe “circle”. May be required if either the top or the bottom of the shoes drags. The star wheel adjusts the effective diameter of the brake shoe “circle”, or how tight it is against the drum. Ideally the shoes should make perfectly even contact, but rarely do without fitting them. I doubt most brake shops even know there used to be a special grinder just for that task.

Thanks for the info on the upper stud. I know that the KB's similar style Nut off to the side on the backing plate and you can adjust the eccentric for the upper part of the shoe. I was just wondering if the upper nut on the R series actually did anything. I think that for as much as the truck will be driven that they are likely fine as they are and then just adjust the bottom adjuster.

On another note I took picture of the front and rear brakes before I took them apart and on the front the shorter show was towards the front of the truck but on the back the short shoe was towards the rear of the truck. After doing some research everyone is saying that the shorter show should always be towards the front. Is that correct?

Thanks for the help.

Mike

You CAN buy the self-adjuster hardware for the mid-'60's 110/1100 series with the 12 x 1-3/4" shoes and turn those into self-adjusting brakes...

Rock Auto shows Raybestos H2538 for the left side kit, and H2539 for the right side kit. Look under '65 D1100.

Buzz,
I did not realize that you could do that. Thanks for the info. I think i will go with what i got as it is all put together. Plus it is going to my Brother in law for enjoyment and driving plus it can be inside.Something to consider on future trucks.m

Mike

I figured it out when doing the brakes on my '52 L-110, right after doing the brakes on my '66 1100.

It was a "Well...DUH!" moment.

I figured it out when doing the brakes on my '52 L-110, right after doing the brakes on my '66 1100.

It was a "Well...DUH!" moment.

Great tip, I learned a new one today

I put self adjusters on my 53 R110. Works well. My truck is a daily driver and I rarely need to do anything with the adjustment.

The user manual and full service manual for your R112 are available on hansenwebdesign.com/truck

Thanks for the tip. I had pulled alot of manuals off of the web and have the larger IH R series truck but not.the R110/112. I will do that. Thank You again.

Mike