 Well,
we pulled the head, and found some disappointing news. The head is
cracked, and the cylinders are pitted from sitting outside for so many
years. Took one of the rod bearings off, and the crank is 8
thousands flat, so that needs to be ground. We are now on the parts hunting phase again.
Pulling the crank uncovered a main journal that has been scored.
More parts! |
  There
is not much left of the Cat after the engine has been removed and
disassembled! |
  Here
are the pieces of the basic tractor. The engine block is up against
the door and then we have it hanging from the engine hoist. |
  We
pulled the transmission cover to check out the transmission, and steering
clutches, and to replace the brakes. Here my Dad is inspecting my
brothers work. |
 This
is as far as we took the Cat apart. We have to replace the sprocket
rings when we put the new undercarriage on it. |
  The
engine components are HUGE on this engine for only being 51hp. The
block is in the wash pan waiting to be cleaned up. |
 The
pony engine is going to be taken apart and checked over. Initially
we knew there was something wrong in that we had a half an inch of end
play on the crankshaft. Disassembly found the pin holding the main
bearings missing, and the crank rod journals slightly flat but within
spec, so we installed new bearings and put it back together. |
  We
took one of the front idlers apart because it was running crooked in the
track frame, and we found a broken shaft. These are not the standard
idlers for this unit, so some research is in order to find the right parts
to fix this. |
  We
found more problems while cleaning the parts up. This is the bell
housing, and you can see the cracks in it. We counted 7 cracks that
we can see. Not sure yet of how we are going to deal with this.
Update: Well, welding did not fix it. Looks like we are going to have to
find a used replacement. |
 I
disassembled the undercarriages so I could get them all sandblasted and
painted. |
