Check the drive gear to see if it is loose on the shaft. If the drive gear is loose, try tightening the mounting nut or set screw. If the drive gear is still loose after tightening the mounting nut or set screw, or if the teeth on the drive gear are worn, replace the drive gear.
Inspect the gears for damage. If the gears are worn, loose, or damaged, replace them. Depending on the model, some gears may be purchased as an assembly.
Over time the gears, trunnion nut, and power screw can dry out and start to make noise. When this happens you can usually grease the components to make them work smoothly and eliminate the noise.
Less Common
05 - Universal Trash Compactor Drive Chain
Inspect the drive chain to determine if it is loose. If the drive chain is loose and cannot be tightened, replace it.
The drive motor might be defective. Before replacing the drive motor, check all of the more commonly defective parts. If none of these parts are defective, consider replacing the drive motor.
When the compacting ram reaches the top of the compactor, the directional switch interrupts all current flow to the motor. If the directional switch fails, the motor can continue to run after the ram reaches the top which can eventually result in the trash compactor becoming very noisy during operation. To determine if the directional switch is defective, use a multimeter to test it for continuity. If the directional switch has shorted contacts, replace it.