1. Remove the O-ring from the Air Chamber and clean the O-ring
contact surfaces.
2. Inspect the Face Seal for signs of wear that may indicate dirt
exists in the air system.
If dirt or oil exists in the air system, the air system must be
cleaned and dried before the fan drive is reinstalled.
3. Remove the Piston Friction Disc and clean the splines of both
the Piston Friction Disc and the Splined Hub.
4. Check the System Sentry
®
for visual signs of melting. If your
fan drive is not equipped with a System Sentry
®
, Horton
recommends that the Piston Friction Disc is replaced with a
System Sentry
®
PFD for proper, safe operation.
NOTE
If for any reason, excessive heat is building up in the fan drive,
the System Sentry
®
will release and create an air open air passa
-
ge. This shuts down the system to prevent any further damage.
5. When replacing the System Sentry
®
be sure to loosen it in
the correct direction. It is a left hand thread and needs to be
turned clockwise for removal.
CAUTION
Minor seal kit and PolarExtreme seal kit
O (D)-ring, face seal and System Sentry
®
8
