I was attempting to use a cylinder leakage test kit on my 51 B yesterday. The procedure is to thread an adapter into the spark plug hole and supply compressed air at 60 psi into the cylinder when the piston is at or near TDC. I had the tractor in 6th gear, clutch engaged. When I would begin to build pressure, the belt drive would rotate counter clockwise until a valve would begin to open allowing the air to escape. I would estimate the belt drive would rotate counter clockwise one eighth of a turn.
I would try to hold it in place, but the pressure would get close to 60 psi and I would no longer be able to keep it from rotating back. My question is how can the belt drive crankshaft be able to rotate without the tractor moving? In 6th gear, clutch engaged. I would suspect any movement of the crankshaft belt pulley would result in tractor movement via the wheels. The clutch was just rebuilt so it should not be slipping. Is this normal?
I would try to hold it in place, but the pressure would get close to 60 psi and I would no longer be able to keep it from rotating back. My question is how can the belt drive crankshaft be able to rotate without the tractor moving? In 6th gear, clutch engaged. I would suspect any movement of the crankshaft belt pulley would result in tractor movement via the wheels. The clutch was just rebuilt so it should not be slipping. Is this normal?