My bench grinder stopped working today and as I had a replacement it was no great problem just a few minutes to unscrew base pull out conection unclip housing and reverse. I just wondered what had gone wrong with old switch so removed white plastic clips and I could release the two halves of housing don't loose springs. Then it is easy to push out connector strips with contactor attached and then coil and actuator lifts out with connector strips to contactor terminals. I checked continuity of coil and no circuit the coil had failed no reason why. Job done.
David