How do I adjust 1972 Chevrolet 3/4 rear drum brakes?

[imthenewguy]

I have a 1984 Chevrolet "k20": 3/4 ton, 4x4, and just put new rear brakes, but the previous owner put a 1972, 14 bolt rear end on this truck. After figuring this out, I was able to get the right parts.

I was able to install new drums, wheel cylinders, and shoes. The brakes work, but the rear brakes don't engage until the pedal is almost bottomed out. I'd like to adjust the brake shoes to make contact sooner when pressing the pedal.

There is no access hole or slot for the adjusting screw in the brake assembly (drum or back plate).

Taking the drum off requires me to take the axle out, which then let's differential oil out. Just messy and seemingly unnecessary labor.

Is there a trick to adjusting these rear drum brakes?

I think I heard someone mention once that you can drive in reverse (slowly) and engage the parking brake, and this should advance the adjusting screw. Anyone know of this trick, or any other trick so I don't have to remove the drum and axle?

 

[Georgeb]

Check this out. You can do it through the hole. you don't need to hold the lever away to move the shoes towards the drum so just reach in there and adjust them up. I would turn the wheel while you do it so you can feel when they make static contact.