The Stovebolt Site Forums The Parking Lot Tons 'o Fun Brake Pedal Adjustment

I have a '48 3800 and my brake pedal seems to be hanging up on the floorboard. Is there an adjustment for the alignment of the brake pedal? I think my next investment will be a shop manual for the rig. But in the meantime, if anyone has dealt with this before, any help is appreciated!

I should mention this happens then the pedal is pushed to the floor. It looks to be hanging up on the left-hand side of the hole (however, if I hold it centered by hand, it hangs up on the upper side of the hole)

What condition are your cab mounts and the floor of the cab? My guess is this is the real problem, having had it happen myself.

There is no adjustment for the pedal location beyond bending the arm, which I don't think is mentioned much less recommended in the service manual.
Otherwise you can moving the cab around the pedal to suit, also not easy, but good sound cab mounts are a fine start.

Grigg

It may also be a good idea to check the pedal bushing. They get worn and let the pedal flop around a bit.
I might add that this is nothing unusual on the trucks I've experience...a 50 and a 52.
If the cab mounts are tight and not worn you may do like some others have done.....file off the side of the toe board where it rubs to get rid of the squeak?

The pedal doesn't just squeak, it gets stuck if you push it down far enough.

I will take a look at the cab mounts, that could certainly be the problem. What seems odd to me is the clutch pedal shafts stays pretty well centered in its hole but the brake pedal shaft is at the bottom of the hole when the pedal is extended and moves toward the top as you depress it.

I'll look for any bushings that might be worn as well, thanks for the tips!

What business has the brake pedal going to the floor. If the brakes are correct, the pedal should only go down about an inch.

You've described the exact scenario my brake pedal had. It was the result of two problems.

1) You need to make adjustments to the brake system so the pedal doesn't go all the way to the floor. I overhauled mine as my first project as that's the most important part of driving. Master cylinder rebuild, new wheel cylinders and bleeding the whole system.
2) My floor pan was rusted out entirely at the front passenger cab mount. This caused the cab to tilt to the right and the pedal linkage to rub on the left of the hole.

Resolving those two things took care of my problem. Hope it helps with yours!

I was able to get the brakes bled with a new master cylinder (wheel cylinders were already replaced recently) and this "remedied" the issue as the pedal doesn't go down that far anymore.