The brakes were dry and rusty, seen here coated in PB Blaster
One brake rod broke off on disassembly and is now too short
Brake pins need to come out before the rear end can be disassembled.
The brake shoes pivot on these and the only part of it that can
be seen from the outside is a small lip that is machined into the end.
The puller has enough strength to pull the end right off the pin
and that's just what I did. Then you're looking at a 1/2 inch stub
that's just 3/8 inch long sticking out of the cast iron rear end,
wondering how to pull a 6.5 inch long 3/4 inch diameter pin that's
been rusting there for 50 years! I noticed I had obtained lateral
movement and verified this by tapping it back in the 1/16 inch it had
moved. I first ground flats on to the stub to see if I could turn it
with a wrench, at first I thought YES, but no the end had just broken
flush with the housing. With nothing to grab I drilled and tapped for
a 3/8 inch bolt and fashioned a washer to fit the puller again, this
time it came but fought the puller the whole way. The other side went
in a similar manner. The engineer that decided this was a good idea
is probably still laughing at us tractor nuts!
The Brake Pin Puller is made at Agrimson Tool Company in Minnesota.
New pins are available from Agrimson Tool as well.
With the shoes removed the remnaints of mouse nests can be seen
Shoes before and after
After getting this far I noticed the service manual said to have the new springs on prior to assembly
The brake pins come out easily when they've only been in a few minutes though!