The stupidity of this design is mind-boggling. Import engines,
especially Toyota, all have slip-on dampeners, with a couple 10's
clearance. There is absolutely no need to have a press fit, except to
demonstrate their inability to machine the crank and dampener to such
close tolerance.
JR
Dweller in the cellar


On Fri, 08 Jan 2010 18:52:52 -0700, Joe Pfeiffer
wrote:

"Karl Townsend" writes:

The boat tranny took a dump. Its a ZF-301C behind a Cummins 450 horse
diesel. Took a trip to the ZF repair shop yesterday. The front of this
tranny has the flywheel transfer plate just press fit on - no key way. To
remove the plate, they hooked it up to 50,000 psi oil pressure on a fitting
in the plate just for this purpose. The interesting part, to press it back
on they put it in a 60 ton press and used the same 50,000 psi fitting to
increase the ID of the transfer plate. Interesting piece of German
engineering. The mechanics there didn't know, but I assume each piece has a
slight taper.

Boat should run again tomorrow.

Moving from boats to cars, one of the very few things I don't like about
modern Chrysler engines is the use of a press-fit for the crankshaft
pulley. Keyed pulleys are just incredibly easier to work with....