I can get the flywheel and brake drum assembly put together and tightened on the spindle/shaft, with the nubs of the pulley engaging the flywheel with no wobble in the flywheel. It is the subsequent steps when I get in trouble and break off the nubs. (happened again yesterday on my third attempt at reassembly)
If you tighten the lock nut on the spindle/shaft too much, the brake cannot hold the brake hub and the hub will spin with the flywheel when you pull the starter rope. So I loosen the spindle nut just enough so that the brake will hold the brake hub in place while I pull the starter rope, allowing the crank/spindle to turn, while the brake hub (which the blade attaches to) is held in place.
Next, I put the belt on. This is where I get in trouble. After I put the belt in place, (the belt lies between the brake hub and the flywheel) the brake will not hold the hub in place while I slowly pull the starter rope because the belt causes too much friction between the brake hub and flywheel. In other words, I pull the starter rope, the flywheel turns and the brake hub turns. So I keep loosening the spindle nut in very small increments, trying to find just the right about of torque to allow the flywheel to turn but not the brake hub. Next thing I know, I have sheared off the nubs again.
<<Go slow, you can not rush this assembly and when you are done you should be able to turn the BBC flywheel by hand without moving the belt.>>
This is the point I can't seem to get right. I can't find the right amount of torque on the nut to be able to turn the BBC flywheel without moving the belt.
Any suggestions?
Thanks,
Mark