From:Doug Miller
Subject:RE: RE: RE: RE: Crank Seals Question Date:Thu Aug 15 23:52:24 2013
Response to:18720
I agree with Dave on the manual. The 58 the earliest in the Harley book Dave mentioned is essentially the same engine as the 56 you're working on.

You may be able to coax the left outer bearing out, then the retainer and seal. I replaced the bearings but was only able to find sealed bearings. I removed the both seals on the inner and right bearings, I trust the engine lubing more than the lube in a sealed bearing. and I removed one of the seals on the left outer bearing, the clutch-transmission oil lubes it pretty well.

The engine oil runs down in the tube between the crankcase and the cylinder. A small reservoir feeds oil to the case side of the bearing. putting the bearings in with one seal still intact reduces air-fuel-oil from puffing through the bearing.


If you are disassembling your engine, you really need to have a Service Manual. Good News! It is still available from your local Harley-Davidson dealer.

1958-1966 American-Made Lightweight

Part# 99444-93 - Reprints of original service manuals and
parts catalogs for the Hummer 125, ST165 Super 10, Pacer,
Scat, Ranger, Bobcat and Topper scooter. Also lists the
colors, accessories and equipment for each year and model
from 1958 to 1966. MSRP US $40.00

Check the first listing under our "Parts" section for all the antique literature still available. H-D's website has changed, and they don't show the list of all the different books anymore. But you can type the part number into Search on their web site, and it will show it.

--- Original ---
My questions is, the left crank seal is I assume behind the bearing? Does this mean the cases must be split to replace the crankshaft seals? Was hoping the service manual links on this website would work but they appear to be just pictures. I would appreciate any tips and/or advice. thank you!!