Fill the pump head cavity about one third full with isopropyl alcohol.
Wet the piston tip with a few drops of isopropyl alcohol.
Holding an absorbent towel beneath the pump head assembly, line up the pump head and carefully slide it into place. Be sure that the inlet valve is on the bottom and the outlet valve is on the top. Do not force the pump head into place.
Finger tighten both knurled nuts into place. To tighten firmly, alternately turn nuts 1/4 turn while gently wiggling the pump head to center it.
Re-attach the inlet and outlet lines.
base-id: 4540379275
id: 4540379275