Gorman-Rupp Pumps PA4A60-4024T-ESP 1446296 and up - Manual (Page 51)

OM−06301 PA SERIES
MAINTENANCE & REPAIR PAGE E − 29
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 14 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 14. Cartridge 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 (6). Position the seal plate over the shaft
and secure it to the bearing housing with the hard-
ware (7 and 8).
To prevent damaging the shaft sleeve O-ring (4) on
the shaft threads, stretch the O-ring over a piece of
tubing. The I.D. of the tubing must be slightly larger
than the O.D. of the shaft. To ease installation the
tubing wall should be as thin as possible. The
length should be long enough to cover the threads
on the end of the shaft. Slide the tube over the shaft
threads, then slide the O-ring off the tube and onto
the shaft. Remove the tube, and continue to slide
the O-ring down the shaft until it seats against the
shaft shoulder.
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 (3) provided with the seal,