Pa, thanks for your reply. Here is another puzzle. Race reground to given spec clearance with new metric 3.5mm rollers. The length is 0.003" longer than original rollers.
Expected to maybe have to reduce thicknes of the trust washer, 2520-41. But no! The race width minus the trust washer thicknes give 0.015" clearance from roller to race edge, assuming the edge of trust bearing race, 2522-41 ends at the race edge.
Here comes the problem. From end of race to trust bearing race I measured approx 0.07" clearance. Meaning the roller would be having a free end play of 0.07+0.015=0.0715", and even worse the roller could wander hanging 0.07" on the inside of the race.
I noticed when taking the transmission apart, the trust washer, 2520-41 was installed on the wrong side towards the trust bearing race, 2522-41, and not towards the retaining washer 2520-41A. This may make sense as the person assembling this transmission once must have realised this problem. I even dug out a trust bearing/and race from other rebuilds Ive done to compare and see if the trust bearing race lip was smaller on this one, but they are the same. The only explanation I can think of is that the groove for trust bearing in the clutch gear race is to shallow.
Or should the rollers have this big end play? It does not make sense to allow the roller outside its race.
I have cut a second trust washer # 2520-41 from an old flyweel trust washer, to have on both sides of the rollers. That should keep the rollers within the race and give roller end play of 0.012".
Another interesting point is there must be an error in the 1950 45" spare part catalog. The retaining washer 2520-41A has switched place with 2520-41 on illustration on page 38.


GuS