Magnum Venus Plastech Pro Series VPRO-45220 22:1 & 7:1 - Manual (Page 26)

VPRO-45220 Series Resin Pump Manual
Rev. 11/2013 Page | 26
Assemble Piston Body Assembly:
1. Lubricate the two piston cups with Red Grease (6706-2-1).
2. Assemble the piston body components onto the piston body in the order they were
removed. Be sure to assemble the components with the correct sides facing each other.
See below
a. The piston cup backup ring should have its grooved side facing up toward the
pump.
b. The piston cup s hould have its “cup” facing up.
c. The piston cup spacer ring (which separates the piston cups) should have its
grooved side facing up.
d.
The second piston cup should have its “cup” facing up.
e. The compression ring should have its beveled side facing down toward the
bottom of the pump. Newer versions of the compression ring are universal, both
sides are the same.
Piston Cup
Piston Cup Spacer Ring – Ridges Up
Piston Cup
Piston Cup Backup Ring
– Ridges Up
3. Keep the ball and piston ball spring with this assembly, but do not assemble them onto
the pump yet.
NOTE: Be sure the compression ring is positioned down over the shoulder of the piston
body or the piston cups will not tighten properly.