Camshaft Thrust Plate, 1972 Cub

[Bus Driver]

Suppose that the cam journal experiences side wear also? That increases the clearance. A thrust plate could be made on a vertical milling machine or a lathe with the center section round and the same nominal diameter as the cam journal and the mounting ears cut down thinner so as to leave the center portion raised slightly to decrease the clearance.

[Boss Hog]

Thanks, Eugene. Yea, most of the used ones that have pictures of show considerable wear. Honestly, mine doesn't appear to have as much wear as most of the used ones I'm finding for sale.
I'm going to take a close look at reversing mine and I'm also seriously considering having a machine shop build me a new one to tolerance. I think that is fairly important to fit to recommended tolerance otherwise the camshaft could have a tendency to move back & forth and wear the journals and the bearings.

I think this should be called a "wear" plate instead of a thrust plate. The 1st journal of the Camshaft definately rubs against it and it obviously wears.

Take care,

The Riot

The cam does not have bearings. The only concern would be the oil pump in my opinion. Flip it over, should be fine.

[Boss Hog]

On second thought, I am not sure you can flip it over , I think the holes may be offset

[ndtheriot3030]

I'm Traveling on a business trip, but as soon as I get back to my shop I'm going to get the "flip-job" a try and let everybody know.

thanks

The Riot

[ndtheriot3030]

OK, I'm finally back on the Camshaft and Thrust Plate issue. I've decided since I can't find a new Thrust Plate and that the bearing journal is probably the piece that is worn, I am having a machine shop build a new TP for me. Since it appears that the journal is worn we will have a raised area on the TP to compensate and bring the tolerance back to .003 to .012 as per Cub Manual Spec. The raised area will be no larger in O.D. than the O.D. of the Journal. It's at the M. Shop now and I will let you know how it works out.