Can anyone tell me what kind of staples this gun will take?

Please Help.
I am assembling one of these stapling guns which I took apart as it did not work. Contacts were corroded. I cleaned and greased it, but when assembled it will only fire once before it jams; it appears that the two cams actuating the hammer are not properly set relatively to the hammer, as the gear is under a lot of tension when the case is opened. What is the proper setting or alignment upon assembly?
Thank you.

I couldn't figure out why the stapler stopped feeding/pushing staples to the front of the sub magazine. Since the stapler didn't work I figured there was nothing to lose by taking it apart. In doing this I can't figure out how or where to put the leaf spring. It just fell out when I opened the stapler. And I still haven't figured out why the pusher stays all the way at the end of the magazine. Shouldn't it come out when I pull out the magazine? It just stays at the front which means if I put staples in it they sit BEHIND the pusher but don't they need to be in front of it - isn't that the whole point of the pusher?

I find this tool needs a lot of TLC. I does not like humidity when stored. I have had to have it repaired twice for humidity when leaving it the garage. Other wise it's a great tool for the ladies. I have found it capable of driving a staple well into any wood. I have used it to start wall board with the longest staples. Baring the weight it can be used over several hours with out fatigue. Can't see why they stoped making it. I've had mine over 10 years.