S&S Cycle Sidewinder 3 5/8 Big Bore Cylinders for 1936–1999 Big Twins - Manual (Page 14)

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• Some solvents, degreasers, gasoline and other chemicals are harmful to skin, eyes and other body parts. Many items are flammable
and present a fire hazard. Read manufacturer’s instruction label for proper use. Use in well ventilated area and wear protective
clothing when using them to avoid personal injury.
• Compressed air and particles dislodged by compressed air are harmful to eyes and body. Wear protective goggles when using
compressed air and always direct air stream away from body parts such as hands and eyes and other people near you.
Perform following steps when assembling flywheels:
A. Thoroughly clean all parts to be used. This includes mainshafts, main bearings, connecting rods, rod bearings, crankpin nut retainers and
screws if they are to be used, keys and flywheels including tapers and keyways.
Burrs, dirt, filings, etc. left on flywheel assembly parts may circulate in oil damaging other parts possibly causing engine failure.
B. Check both mainshafts between centers for taper surface to bearing surface concentricity. Make sure centers on shafts are clean
beforehand. If tapers and bearing surfaces are concentric with each other and with center, then truing will be easier. See Picture 9, below.
NOTE: Stock specs. allow maximum of .001" runout between taper and bearing surfaces. S&S® prefers to see .0003" or less with an absolute maximum of
.0005". S&S shafts are .0003" or less.
C. Inspect keyways and oil holes for burrs in flywheels and remove if necessary.
D. With key in shaft, insert into respective tapered hole in flywheel and check to see that key does not bottom in groove. If key bottoms out,
file flat side of key, not rounded side, until shaft with key in place fits in flywheel without bottoming out. Check crankpin and crankpin key
also.
E. Reclean mainshaft tapers, crankpin and flywheel tapers with lacquer thinner.
F. Assemble mainshafts in respective flywheels. Coat taper and threads of each shaft with green Loctite® during assembly. Install crankpin
in camside flywheel using Loctite® also. Tighten all nuts to at least factory torque specs minimum. When S&S shafts are used, follow
instructions included with them.
NOTE: Use of a torque multiplier in conjuction with a professionalquality torque wrench will make it easier to achieve high torque accurately.
After right side flywheel, pinion shaft and crankpin are assembled, blow air through pinion shaft oil feed hole to check for blockage.
Partially or completely blocked oil feed passageways may cause irreversible damage to bearings and other engine components.
CAUTION
CAUTION
WARNING
Picture 9