allright.. good news you have virgin stp internals and a stp spring it should be very soft..
clean your lower tube.. hammer and pickup
after assembled put light oil on the pickup rod.. just in front of the brass nut.
I cannot see the top of your valve housing (where the bold slides along the top add just a little vasolene or some sort of grease to help the metal on metal contact)
lastly check your be sure that your bolt slides freely in and out of the marker clean and add light amounts of oil where necessary.
I did not see the back of the bolt but i'm going to assume that you don't have a setscrew.
and thats it.. it should have a light stroke that is equal or better than a t-2 or 6.5 although it will feel alittle more sloppy since there is no guide for the pump arm.
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Last edited by Tinman; 02-25-2013 at 03:42 AM.