The Stovebolt Site Forums The Parking Lot Big Bolts Huck brake adjusters

Anyone know if it would hurt anything to heat the star adjuster on my ‘52 Huck brakes? I’m replacing everything with new and only one of the adjusters will turn. All I’ve tried was brute force and PB Blaster.

Just guessing here, but I think the adjusters are part of the brake cylinders, and if you use heat it may mess up the seals in the cylinders. But if you're replacing the cylinders, then use whatever method necessary to get the adjusters off. Or do replacement wheel cylinders come with adjusters?

The adjusters are mounted to a plate in the wheel, not a part of the wheel cylinder.

More info is needed. I'm assuming now that you're talking about your rear brakes on the 2-ton, which do have adjusters separate from the wheel cylinders, but your front brakes would be single cylinders with adjusters on the ends of the cylinders. I found the picture in the service manual showing a picture of the rear brake assembly with the separate adjusters. Here's a Link to Figure 3 in the 47-51 Truck Shop Manual. The '52 supplement has essentially the same figure of the 2-ton rear brakes only bigger, so your '51 should be the same.

So, I'd say heat away. I'd use PB blaster and heat alternately to free up the threads on the adjusters.

BTW, from looking at the manual, it looks like your 2-ton has Huck brakes and the rear brakes are called "Twinplex" which were manufactured by Bendix. HERE is a website I found detailing those.

HERE is a link to the adjustment procedure, with a clearer picture of what you're dealing with (Fig. 26)

Amazing! Thanks for the help.