Reply To: FX Pump Rebuild



Yes, I am using the parts diagrams. It is interesting to note that both pumps are comprised of one piston rod and three tubes. The newer "Turbo" model has moved the large piston to the bottom of the next sized tube (upstream), while installing a "small piston" at the original location.  Pretty much the same pump design with an additional compression chamber fitted in line in front of the small piston. I guess this explains the advantages of super charging pumps with compressed air: an external compression chamber.