6. At this point you can remove either the connecting rod from the displacement rod or
the internal check valve from the connecting rod. Typically, you will be taking apart the
internal check valve assembly to inspect and clean.
7. Please note that you must loosen the hex nuts and re-tighten upon assembly.
8. Carefully clamp piston valve housing in vice and unscrew piston pump. Remove the
piston valve housing for build up, debris or damage.
9. Re-assemble the piston pump to the piston valve housing with the piston valve,
washer and piston cup in place. Shown in the picture below are the components for
the upper check valve.
10.
Re-assemble the hex nut noto the connecting rod. Install the piston valve housing
assembly onto the connecting rod. Adjust the piston valve housing so that the
tolerance between the connecting rod and the piston valve is between 0.060” and
0.080” using a feeler gauge for accuracy.
This gap is extremely important because
too much gap will not allow the fluid to flow correctly; too little or no gap will
restrict the flow.
11.
From the fluid section, remove the three lock nuts from the three tie rods. Slide
complete air piston assembly out through the outlet housing. Complete air motor
assembly part NO. is #700014 is shown in
“4.0 Parts Identification for all pumps.”
