1) Check pinch roller tension. (Section 5.4.2)2) Check the spring pressure on the idler roller. (Section 5.1.2)3) Verify that guide rail is not binding material.4) Clean the rollers. (Section 7.11.2)5) Clean roller shaft bushings and inspect for damage.6) Check and tighten roller shaft and pulley set screws.7) Verify belt tension. Belt should deflect slightly when pushed.8) Replace blade motor brushes.