Food processor repair.How to fix food processor ?

Restoring a food processor to service

The blades of a food processor fit onto a shaft that is turned by an assembly of pulleys, gears and a toothed belt. To protect the user from injury, a safety switch allows the blades to rotate only when the bowl is properly seated over the base and the bowl cover is locked in place.

To repair a food processor, take off the bottom of the housing and remove the motor cover. Test the electric cord, the safety switch and the on/off switch for continuity; if they do not show continuity, replace them. Inspect the motor for damaged or burned windings; if you find any, replace the motor. If the motor runs but the shaft does not turn, look for a stripped reduction gear or a broken pulley belt. To replace the belt, slip a new one around the pulleys. Replace a stripped gear as shown below.

Replacing a food-processor gear. 

With the bottom of the housing and the motor cover removed, slip off the pulley belt. To replace the small reduction gear on the motor shaft, immobilize the shaft by inserting a screwdriver between two blades of the fan on the base of the motor; unscrew the gear with your fingers, and screw on a new gear. To replace the large reduction gear on the motor cover, slip the broken one off and replace it with the new one.