13 of 15 customers found these instructions helpful
Brushes were worn out
Sander would only run for 2-3 minutes and shut off. I was not sure if it was brushes, but ereplacement description sounded like it. Old brushes did not look badly worn. Take off top plate on to of sander (2 screws); use compressed air to blow out dust and accumulated sawdust; find brushes and associated wire connection on each side of armature; using pliers, gently pull up on brass end of wire where it enters connector along outside edge of housing (can follow wire easily from end of brushes - connection just pulls straight up out of slot where brass wire end goes into slot; now push coil spring aside that holds each brush against armature; once coil spring clears opening where brush inserts - just slide old brush and connected wire out. Brush and wire assembly is about 4 inches long. Reverse procedure putting the new brushes back in. It is a little tricky to slide the new carbon brush into the plastic slot that aligns it with the armature since the rectangular brush and rectangular slot have to line up in the tight space - so check that the coil spring is completely out of the way of the slot without breaking off the coil spring (it is pretty resilient). Using needle nose pliers, grip to new wire by the brass end and slide it down into the connector where the old one came out - be sure it goes all the way down. Check that all of the wires are laying back into the plastic groves of the inner housing and out of the way of the top plate screw holes and screw the top plate back on. Surprising how much better new brushes make your sander run like new - I just about threw it away before trying this simple and relatively cheap fix.