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SERIES 55 RING GEAR

The steel ring gear, which meshes with the starting motor pinion, is shrunk onto the rim of the flywheel. ‪

Replacement of Ring Gear

Inspection of the flywheel indicated that ring gear replacement is necessary. See Figure 21776 . ‪

Flowchart for Replacement of Ring Gear

Removal of Ring Gear

Pre-cleaning is not necessary. ‪

Remove the ring gear as follows: ‪

  1. Using an acetylene torch, cut the ring gear 1/2 to 3/4 of the way through, without allowing the flame to touch the flywheel.

    To avoid injury from burning, use lifting tools and heat-resistant gloves when handling heated components.

  2. The uncut portion will now yield. Tap the ring gear to remove it from the flywheel.

Installation of Ring Gear

Install the ring gear as follows: ‪

  1. Support the flywheel, ring gear side up, on a flat, metal surface.

    To avoid injury from burning, use lifting tools and heat-resistant gloves when handling heated components.

    NOTICE:

    Never heat the ring gear over 204 C (399 F). Excessive heat may destroy the original heat treatment. Use heat indicating " crayons," placed on the ring gear, which melt at a predetermined temperature. These crayons may be obtained from most tool vendors, and will ensure against overheating the gear. ‪

  2. Heat the ring gear uniformly in an oven.
  3. Using a pair of tongs, place the gear on the flywheel with the chamfer facing the same direction as on the gear just removed.
  4. Tap the gear into place against the flywheel shoulder. If the gear cannot be readily tapped into place, remove it, and apply additional heat.