MTFCA Forum

When fitting a gear on the generator, with the key in place and retaining pin in place before peening , , how much clearance is acceptable to eliminate gear wobble ?

What you really have to be careful of is to make sure you slide the Bendix on without popping that key out the back and into your transmission.

James... The starter is already in and no problems, I was referring to the generator

The generator gear should be a snug, sliding fit on the generator shaft. If the gear is wobbling or lose on the shaft, something is not correct- either the gear bore is incorrect or the generator shaft is worn. Is this an original gear or a reproduction? If you have an original gear, you might try it for a sanity check.

There was both an original gear and a new reproduction gear. .. The original gear visibly is thinner than the reproduction with a little mounted wobble. The reproduction gear hopefully is a good copy of a NOS gear, was noticeable thicker teeth, with a less slight wobble. Have reproduction gears been true to Ford NOS specs ? ..... Just a side note, I have no knowledge of who makes the reproduction generator gears..

As Dan said, it should fit snug. If not, the wobble will get worse. Either the shaft or the gear will erode. And, since it runs constantly, this can happen rather rapidly unlike a bendix which runs very little. The gear fit up on a generator must be right, snug.
We press our gears on with the armature out of the housing with an arbor press. It’s never a good plan to pound a gear on while the armature’s in the housing.
Respectfully,
Brent

Shaft on this generator, may be may be slightly worn down. The new run of gears do slide on okay but will slow slight play on the shaft.... Question... Do you think heating the gear and then quenching would reduce the inner diameter of that gear?