Gorman-Rupp Pumps PA4A60-4024T 1476457 and up - Manual (Page 43)

OM−06415 PA SERIES
MAINTENANCE & REPAIR PAGE E − 21
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
A new seal assembly should be installed
any time the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
Reusing an old seal could result in prema-
ture failure.
To ease installation of the seal, lubricate the shaft
sleeve O-ring and the external stationary seat O-
ring with a very small amount of light lubricating oil.
See Figure 10 for seal part identification.
SEAL PLATE
O-RINGS
IMPELLER
SHAFT
STATIONARY
SEAT
STATIONARY
ELEMENT
ROTATING
ELEMENT
DRIVE BAND
BELLOWS
IMPELLER
SHIMS
IMPELLER
SPRING
RETAINER
INTEGRAL
SHAFT
SLEEVE
SLEEVE
O-RING
SPRING
CENTERING
WASHER
SHEAR
RING
(SHEARED)
Figure 10. Seal Assembly
This seal is not designed for operation at
temperatures above 160
_
F (71
_
C). Do not
use at higher operating temperatures.
If the seal plate was removed, install the seal plate
gasket (3). Position the seal plate over the shaft
and secure it to the bearing housing with the hard-
ware (6 and 7).
To prevent damaging the shaft sleeve O-ring (26)
on the shaft threads, cover the threads with electri-
cal or duct tape. Slide the O-ring over the shaft until
it seats against the shaft shoulder. Remove the
tape covering the threads. Check to ensure that
the shaft threads are free of any tape residue and
clean as required before proceeding with seal
installation.
Lubricate the external stationary seat O-ring with
light oil. Slide the seal assembly onto the shaft until
the external stationary seat O-ring engages the
bore in the seal plate.
Clean and inspect the impeller as described in Im-
peller Installation and Adjustment. Install half of
the set of impeller shims (25) provided with the