tippmann sl-68 ii gen 2 problem

I bought this sl-68 ii off fo craigslist for 50 bucks and went out and used it and had a blast. the thing worked flauless. But after i took it apart to clean it for the first time and didnt really no what i was doing and something must be missing because when i went to use it again the gun wont work. i figured out that the hammer is being pushed back to far so the trigger cant ingage it. I cant figure out if im missing a piece of **edited** is going on. any help would be greatly appreciated.

i was using a schimatic to put it back together and when looking at the schematic it doesnt seem like im missing any pieces. Any ideas?

all i did was field strip it. i pulled out the barrel and bolt assembly. then after i cleaned and oiled it i put it back in the same way it came out. but every time i pump the gun the rear bolt and sear seem to be pushed back to far so that the trigger cant engage it.  the valve tube is being pushed through the hole in the rear bolt, thats where i thought i was missing a washer. Do you get what i mean?

If its aired up and it's still not cocking make sure ya did not turn in the pump rod too much or lossen it off too much (usually causes a leak).

Did you accidentally adjust the pump rod length then.   It very easy to do as one you have pump arm off the rod spins easily witch in turn lengthens or shortens your pump stroke.