So I am running in my chassis and tweaking various adjustments. I was originally worried about the super tight Kevlar bands. Despite the metal bands being round, they were pretty tight even when I backed off the nuts.
Now that I'm running the car the slow speed and reverse seem to be ok. When I push them down they work fine and when I lift up on the pedal they return. The brake band works but when I lift up on the pedal it doesn't come all the way up. So, I'm worried about that band dragging on the drum. I installed the stronger springs but had to back off the nut so the band wouldn't be too tight on the drum. I am wondering if I should attach an external spring to pull the brake pedal back just for safety's sake. Maybe over time it will work it's way in.
I am removing the transmission cover after each drive to check the drums and remove the metal bits on the magnets.
I'd oil the shaft, check that the floorboard or carpet isn't causing the problem.
Mark, if I remember correctly, there is a cam on the side of the hogshead that could be worn down. I had the same problem with my clutch pedal and couldn't figure out what the deal was since everything checked out. Turned out to be that worn cam.
If you're getting metal bits on the magnets every time you open it up from a drive, I got a hunch you have some sort of very serious problem. Better be delving into it thoroughly.
Check the spring.
Tim ... these are the typical fine metallic deposits you get .. and the reason for the magnets in the first place. The rebuilt engine has only about one hour of running time. I suspect there will be more on that magnet as the rings work in.
Don, ...no floor boards. Bare chassis.
Larry ... new stronger spring ...
As you're using new, strong springs, I suspect Marty's suggestion of a worn cam may be on target. Fortunately, installing a new one is easier than the low pedal cam.
I don't remember what you did to the engine, but it's normal for the screen magnet to collect a lot of fuzz immediately after new rings are installed. It should diminish with each oil change as the rings seat. If that's the situation, just fuzz after engine work, it's probably not a problem. If it's chunks, as Tim says, it could be trouble.
Mark this part may be worn out
Mark, the pedal is driven out by two forces, the spring in the steel band and the coil spring around the shaft between the band ears. With a heavier coil spring installed, you should have no problems.
I'm with Don. Check to see if the shaft is binding. Did you fit O rings around the shaft under the cam? They may be compressed tightly around the shaft. You can check this by loosening the bolt off a bit. Make sure the shaft is well lubricated.Then check to see if there is a bend in the pedal shaft. I can see the cam ramps playing a role in this only if the working surfaces are dry/rusty, causing undue friction.
It is too late now, but when I re-fit bands I always check them to be round on the drums, and then spread them some to give them more rebound when relaxed.
Hope this helps.
Allan from down under.
EUREKA .... problem solved!
First of all ... the stuff on the magnet is what you expect from working in new rings ... not chunks or bits ... just fine metallic fuzz. No problem there.
Now as far as the bands. Yes, I had said before that the bands were perfectly round and put on the drums before the hogs head was installed. However the springs were the stronger type suggested for Kevlar linings.
So, here is the thing. Those bands were murder to install and to get the cover to fit. And they were very tight to the drum even after loosening the nuts. The reverse and clutch settled down enough to not worry. I had tightened the nuts as tight as I could on all the bands and left them for a couple of weeks and this seemed to help the reverse and clutch bands. But when the brake band was loosened the pedal would not come back fully when released.
I removed the nut on the brake pedal tonight and noticed that the spring was caught in the band lug opening in a place that was hard to see. I compressed it and then let it go and it when where it should go resting on the lug rather than in the lug. Problem solved. The pedal returns even at the loosest setting ... no problem with the cams. Now it's just the typical adjusting after running the chassis. A perplexing problem with a simple solution.
Boy, if that isn't a "stress reliever" !!!
Was driving me crazy. Put that on the list for peculiar problems. Those springs should be designed with an integral washer on each side. :-)
Mark, how's the new engine running? The one I picked up for my father in-law is running quite well. Electing you to have similar results