A newly fitted shaker motor shakes the cabinet as it should but makes a loud squeal or squeak while running.
New shaker motor runs but squeals: a few drops of light oil
Cause: The motor's bearing surfaces at the commutator end were running dry; this can happen straight out of the box.
Checks
- Confirm the motor runs and shakes normally in the test menu, so the noise is mechanical rather than electrical.
Fix
- With the game off, put a few drops of light machine oil or a plastic-safe synthetic lubricant onto the commutator end of the motor through the openings in the motor case.
- Spin the motor by hand a few times to spread it, then test again.
Systems
Games
Source: Pinball Repair help group!! (Facebook group)