can you post a picture of how the belt is seated on motor pulley and subplatter?
for 33.3 it should be in the top groove of the motor pulley.
is the motor pulley shaft bent or dirty? you can clean the pulley with isopropyl alcohol.
for 33.3 it should be in the top groove of the motor pulley.
is the motor pulley shaft bent or dirty? you can clean the pulley with isopropyl alcohol.