1901-1953 Indian Motorcycle – Parts – Accessories

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  5. 141 – Flywheel Assembly

FLYWHEEL ASSEMBLY

TIGHTENING OF PINION SHAFT, DRIVE SHAFT AND CRANKSHAFT INTO THE FLYWHEELS: (We recommend the use of a Torque Wrench).

  1. “Z” Metal Flywheels. (Marked “Z” on counterweight). This metal allows the shaft nuts to be tightened to 100 foot pounds.
  2. Cast Iron Flywheels. (Not marked”Z” on counterweight). This metal allows the shaft nuts to be tightened to 75 foot pounds, or equivalent estimated pull, with flywheel wrench #23T286.
  3. Tightening the nuts beyond this recommended pound pull will result in:
    • Pulling the shafts too far into flywheel tapers and they will not stay tight.
    • Distorting the ends of the shafts to the extent that the centers are slightly out of true in relation to the taper and finished bearing surfaces.
    • Stripping of the threads on the shafts or nuts.

PRECAUTION TO BE TAKEN WHEN TRUING SHAFTS IN THE FLYWHEELS:

A. Do not strike the flywheels to align the shafts when they are set up on centers in the truing fixture or lathe.

B. Do not strike flywheels or shafts when there is a “runout” of .005″ or more. Remove the shaft from the flywheeland inspect for dirt, chips, or high place on key. Any Irregularity must be removed to allow the shaft to pull up “true” against the flywheel taper.

C. Do not strike the oil hole end of the pinion shaft at any time. Due to the small diameter of this end of the pinion shaft, the center can be very easily damaged to the extent that it cannot be used to true up the flywheel assembly accurately.

This Service Shot is the result of comments received from mechanics who have had trouble when putting together flywheel assemblies.

INDIAN MOTOCYCLE COMPANY

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