6 Maintenance
PLUNGER ASSEMBLY MAINTENANCE
PLUNGER ASSEMBLY
The plunger assembly consists of a Teflon piston attached to a piston rod. The outer rim of the piston
is expanded outward with an embedded quad ring.
The piston is resistant to wear and provides sealing for prolonged usage if handled and maintained
properly. It is recommended to clean the sealing area daily using a wipe moistened with isopropyl
alcohol. Enure the seal is dry before using the plunger again.
CHECK PLUNGER SEAL
When a leakage develops, it is typically caused by the piston having lost some of its expanded
condition due to a characteristic of Teflon undergoing cold flow — as opposed to wear. The piston is
easily restored to full operation when the cause is not wear.
Wipe or brush the piston free of adhering particles. Use a round-bottom object, such as the handle of
the brush supplied with the analyzer, press down on the quad ring, and move the object around the
piston circumference, forcing the piston rim outward.
6 - 4
GeoPyc 1365 Operator Manual
136-42800-01 (Rev -) — Dec 2016
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