Cam Gear Puller
The cam gears on the L10/M11 Cummins diesel engines are
thermally shrunk fit onto the camshafts. The tight fit ensures that
the gears do not slip on the shafts and mess up the timing, but it makes
it very difficult to remove the gears after they have cooled. A regular
gear puller would not fit around the outside edge of the gear on the partially
assembled engine, so I designed this little pneumatic gear puller in Pro
Engineer and had it made for the assembly line mechanics. The four
grippers in the front of the puller slip into the holes in the gear and,
with a twist, lock tightly onto the gear web. The pneumatic ram then
pushes agaisnt the end of the shaft and pulls the gear free. I was
extremely impressed with how it turned out and now there are quite a few
of these things floating around the Jamestown Engine Plant.