Distributor cam bushing

[Kimbob54]

I had to replace the centrifugal advance on my 52 8N (side
distributor). The old one was falling apart. I bought the new
one from this site. There is no brass bushing in my new
advance and there is slop and the cam will move about 1/8 of
an inch. I can set the points and it runs well but it keeps
wearing out the follower that rides on the cam. Am I missing
something here? I don't see anywhere a bushing is called out.

 

[JMOR]

(quoted from post at 14:07:53 09/18/15) I had to replace the centrifugal advance on my 52 8N (side
distributor). The old one was falling apart. I bought the new
one from this site. There is no brass bushing in my new
advance and there is slop and the cam will move about 1/8 of
an inch. I can set the points and it runs well but it keeps
wearing out the follower that rides on the cam. Am I missing
something here? I don't see anywhere a bushing is called out.

f the advance/cam wobbles on the shaft, then the shaft must be worn below correct size. If shaft wobbles & adv/cam fits shaft well, then look for worn distributor to shaft bushing.

 

[Kimbob54]

I suspect the old worn out advance wore the shaft. I could mic
it and suspect it should be the same diameter as the top?

 

[Denny K]

By follower, do you mean the rubbing block on the points? If so, point grease or other stiff grease will almost stop the wear.

 

[Kimbob54]

I had the same thought and put a small amount of dielectric grease on the cam frequently. No movement in the shaft either. Might pull the shaft out and build up the worn area or just buy a new shaft. I wonder how much clearance there should be between the shaft and cam hole? .010?

 

[JMOR]

(quoted from post at 08:38:28 09/19/15) I had the same thought and put a small amount of dielectric grease on the cam frequently. No movement in the shaft either. Might pull the shaft out and build up the worn area or just buy a new shaft. I wonder how much clearance there should be between the shaft and cam hole? .010?

ounds like far too much to me. Think of it this way: if cam has 0.010 side to side slop, that could be thought of as adding or subtracting 0.010 to or from the 0.025 point gap. 0.015 or 0.035 ???