04-01-2020, 05:39 PM
Your pulleys will not be on the same axis as each other, if the spindles are not parallel with the pulleys in line then you will get this problem.
My dads old 33 box did this for years he just reset the tension with it running on half of the cam pulley and changed the belts when they eventually shredded themselves.
When the engine came out for a rebuild he made sure all the three castings were in correct alignment and the problem went away.
The most likely culprit is the starting handle casting not being in line with the top of the crankcase allowing the dynamo housing to to tip
If this is the case then the dynamo gear will not be at its optimum mesh with the cam gear.
The only way to check is to remove the dynamo and housing.
The nose piece could be up down or slighty rotated.
My dads old 33 box did this for years he just reset the tension with it running on half of the cam pulley and changed the belts when they eventually shredded themselves.
When the engine came out for a rebuild he made sure all the three castings were in correct alignment and the problem went away.
The most likely culprit is the starting handle casting not being in line with the top of the crankcase allowing the dynamo housing to to tip
If this is the case then the dynamo gear will not be at its optimum mesh with the cam gear.
The only way to check is to remove the dynamo and housing.
The nose piece could be up down or slighty rotated.