Air impact wrench help

[climber8483]

I have an older Chicago Pneumatic 734 and this thing is frustrating me horribly. It was missing the air intake valve and wasn't running so i figured it just needed a tune up. I pulled the wrench apart, replaces the seals and turbines, and it still doesn't work. So then I pulled the reverse/forward button out and cleaned inside there and still no change. The unit rotates freely, just like my working unit.

So the unit has been rebuilt and cleaned and it still won't work.

Any suggestions?

Thanks,
Brittain

 

[climber8483]

Mods, I meant to post this in Tools. I can't figure out how to delete, Didn't mean to cross post.