REPLACE PLUNGER PISTON
It is recommended to replace the piston and the quad ring at the same time.
1. Unscrew the piston rod from the piston.
2. The quad ring is preloaded in the groove on the front of the piston. If it has become dislodged,
insert the quad ring into the groove on the front face of the piston.
3. Screw the piston rod into the back face.
4. Tighten the plunger assembly firmly without using excessive force.
5. Test the tightness of the piston:
a. Place the plunger in an empty chamber.
b. Holding the plunger still, rotate the chamber around the plunger in a direction that would
tend to unscrew the piston. If the motion of the chamber begins to unscrew the plunger
assembly, it needs to be tightened further.
Replace Plunger Piston
GeoPyc 1365 Operator Manual
136-42800-01 (Rev -) — Dec 2016
6 - 5
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