It would be nice to have some kind of instructions with the parts, I still need a new key to make things work right. The pump is a 3000 psi but is much weaker than my old 3200 psi. The old unloader doesn't have any adjustment on it that I can find. So I still am playing with it.
Chris Does Not Recommend This Product
I apologize for the issues you are having.The hollow shaft pumps do not come with replacement key as the keys are supplied with the male shaft, so usually replacements would have to be replaced by the engine supplier. General Pump does supply the key with the male shaft (solid Shaft) Pumps. Unfortunately, parts, just like car parts do not come with install instructions. If you are having trouble installing the pump, it will need to go to a service center where they are trained on installing parts. Any questions give us a call at 800-710-7499. Thanks