DA Sander Repair

I have a National Detroit DA Sander that has not operated for a year. (press the air trigger and nothing happens. I can hear some air releasing somethere but not sure where. I took it apart to see if there are any O rings in it, and there are a couple on a small pin, but the dealer I bought it from said they can't get them and that sending it back to National Detroit would not be cost effective for me. Before I try to match O rings myself, I thought I would put this out there to you guys to see if I am on the right track. It is model Z28247 (EZQ) Any advice is always appreciated!



WML13

DA Sander Repair