Allis C brakes

RalphWD45

Well-known Member
I am amazed at the obvious intelligence, of the old engineers, that designed the older AC tractors, and equipment. The way they were able to make things work, with linkages, and metal straps. At the same time WHY would they design the brake pins, on the small Allis's, to fit in blind holes, with no provisions to punch them out, when you needed to replace the worn brakes. At the very least, they could have provided heads on the pins, so they could have been spun in the holes, to looseon them up. I lose a boxend wrench, each time I weld a wrench to them, to use as a handle, and I don't keep cheap wrenches. I know they have all died off, but I still would like to slap the guy, upside the head. The old C that I brought home yesterday has the right wheel frozen, and wont break loose, and I am reasonably sure, that the brake is frozen to the drum. It is now soaking in an ATF and diesel mixture. WHY do I continue to buy these things? Not real smart!
 
Look at the bright side- at least when you're torching and welding away you can stand over it, instead of being underneath to catch the red hot slag, like when torching out the WD brake pins!
 
Standard deal on the C and B brake pins to remove the blind from the blind holes. Sorry you didn't get the bulletin. :)^D
I have done quite a few for myself and helped others. Not a big deal really. I took pictures and have posted them a bunch of times here over the years. The pictures are of a really bad rusted one. An air hammer makes quicker work than the punch in the pictures.

1945CAlliabrakeremoval3-vi.jpg

Peek At A Few Pictures.
 
Dick L, have you recovered all of your pictures that went missing from the host server after the weather event?
 
Yeah Bob, I got a dose of that problem, when I replaced the brakes on my WD45. Wore my leather jacket and chaps, from my commercial welding days. Don't have your boot tops outside of your pants cuffs! Can't get your boot off fast enough.
 
Dick L, How do you know where to put your center punch, to mark where your drill bit starts? Just draw a straight line across the top and hope for the best?
 
It is kinda thin and I take a ball peen hammer and then use the punch to get a large enough hole to use a punch on the pins. I drill it out even round after I get the pins out.
 
It took a long time and several contacts to get them back. They moved them out of the country and I would get a few back and others would disappear for a while. Then one day they were all back.
 
Interesting that you bring up the issue of blind holes. Just learned of that today from an older AC mechanic friend who I bought brakes from today to switch out the "39 B with hand brakes. His B had one hole drilled from a previous fix.

Taught me how I have to do my B, drill a hole aligned with each rusty pin, and drive them out.
 
Why would you torch out those pins? I haven"t done many, but I just drill a 3/4 inch hole in flat stock, lightly weld it to the pin, forming a handle...apply wax as it cools, and shortly it can be worked back and forth and pulled out. I grind off the weld and re-use the pins.
 
Rust is apparently more pernicious here in this damp climate. It's not just me. Anyone to whom I have talked who has done many WD/WD45 brakes eventually ends up cutting the pins out from underneath. Welding a handle on the pin and heating ends up with the head of the pin twisting off.
Just talked to a guy this summer who after he cut the center of the pin out, drove the end in and got it all cut off/out of there, couldn't budge the inner end. I've never had that happen!
 
I already established the fact, that I'm not the sharpest knife in the drawer, so I reckon that;s why I didn't think of using a piece of flat strap, with a hole drilled in it. Thanks for the wake up call!
 
Thanks Dick! I will try first, with the housing bolted to the tractor, and if too much stuff is in my way, then I will pull the housing. Probably need the seal replaced , on the tranny , anyway.
 
The thing I like about removing the final drive as in the picture is that the brake band will come out thru the big hole rather fighting with it out the top. You most always find a lot of gunk that can only be removed out the big hole.
 

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