You need to give us a little more info.
Usually you do not need to remove the whole timing cover to replace the pump, just the little cover in front of the gear. The pump drive gear is held captive and can not skip out of time.
Did you remove the whole timing cover?
If you messed with the gears it is very important that you get it timed right as the valves/pistons are interference meaning you can hammer your valves if the cam is not timed right.
See the photo below for the correct timing on that engine.
Also you state that now the engine will not crank.
I assume the starter is working correctly and the engine cranks but will not start?
Answer those questions and someone here can help you better.