Does anyone know how to remove the wiper arms on a Marine Trader. I've tried everything but no luck. I'm afraid to use to much force and break the motor.
On some arms there is a spring tang that grips past the splined shaft head. It must be moved to release.
Salt /corrosion can freeze the splines so the suggestion of a penetrant may help.
When reassembled use a good waterproof grease to prevent future trouble.