Welcome Daniel,
Starting with the one ton trucks on up to the 2 ton trucks, the rear brake cylinders have have an adjusting pinion,(instead of a slot for direct access to the cylinder like the front brakes). The pinion is kind of delicate and if rusted or seized you will destroy it trying to free it up or adjust the shoes. Pull the drums first to inspect and lubricate first. The pinion has a 5/8" hex head that you will see from the backing plate and there will be two of them for each cylinder.
I have 3 trucks with Huck brakes and I kind of like them but you will see a lot of negative opinions about them. They are just fine as they are designed as long as you use the truck as it was designed. If you want to go 75 mph on the freeway that is a different story. They do require frequent adjusting to keep a firm pedal, about every 1-2000 miles. It takes only about 20 minutes to adjust all 4 wheels once you get the hang of it.
Good luck,
Kent
Last edited by Lightholder's Dad; 01/22/2021 3:18 AM.
