d6-9u pony rebuild

Sounds like you will want to reuse the Federal bearings. Unless you have a good micrometer and confidence in using it, I would get a strip of plastigage and use it to check clearances of the bearing/crankshaft combination you choose. I agree the rough measurements look like you want 0.030" undersize bearings for 1.875 standard crankshaft journal.

I have a "steering wheel" type puller i welded up out of a scrap of 1" plate with a chunk of 7/8" all thread rod and two nuts. I just measure and drill or torch holes in the plate for each pulling job. If the required spread is just a little more or less than some existing holes, sometimes I trim the edges with a torch and use a couple flat washers on each pulling bolt. Other jobs require a new set. I have used it to pull several crankshaft pulleys off the diesels. I think the downsides of beating on the flywheel are too big for me to try anything short of a puller. The biggest one is that the front main bearing is only retained by a hollow pin which seems to fall out on its own fairly often. Certainly don't want to drive the shaft in or out of the block in an axial direction and damage that bearing and pin.

thanks ccjersey
u can see alot of slop between the crank and rods when turn back and forth. is that much play needed for an oil splash system? u would think that 0.010 difference would beat and rattle the crank to pieces. suprisingly the one crank looks to be in pretty good shape.

Posting Standard pony engine specs.
If saved and printed out should be clearer.
Cheers,
Eddie B.

Looks like you have 005 more to go before you even reach the acceptable limit, and probably up to another 005 after that with not much risk if your oil pressure and flow is good

Don't use a jaw type puller on the outer rope groove. I have seen a number of them with notches broke out from where jaw pullers had broke them in the past.

I had a pony flywheel that would not budge. Tried heat, even cussed at it. A lot.

Made a puller from two long bolts and a piece of 1" thick plate. Plate was about 6" long, 2" wide. Drilled 2 holes in the plate to match the flywheel holes , spaced the plate about 8 or 10" away from the flywheel with the long bolts going through the plate into the flywheel. Stuck a bottle Jack (small end) on the pony crank, big end against the plate.

I used a cheater bar and covered the whole thing with a heavy tarp, but it did pop loose.

Sound complicated but it's only 2 bolts and 1 plate ( and a bottle Jack)

Cats suggested method.....
Done with a small diameter hydraulic cylinder or jack even better.