Gorman-Rupp Pumps PA6C60C-B-E50 460/3 1528569 and up - Manual (Page 47)

PA SERIES OM-06531
MAINTENANCE & REPAIR PAGE E - 20
IMPELLER
SHAFT
IMPELLER
SHIMS
O‐RING
IMPELLER
SPRING
CENTERING
WASHER
SPRING RETAINER
SHAFT
SLEEVE
STATIONARY
SEAT
BELLOWS SEAL PLATE
SHAFT
SLEEVE
O‐RING
ROTATING
ELEMENT
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.
Lubricate the stationary seat O‐ring with water or
light oil. Press the stationary seat into the seal plate
(20) until fully seated.
Position the seal plate over the shaft and secure it
to the bearing housing (4) with the hardware (18
and 19). Be careful not to damage the stationary
seat on the shaft threads.
Lubricate a new seal plate O‐ring (35) with grease
and install it in the groove in the seal plate.
To prevent damaging the shaft sleeve O‐ring (27)
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 O.D. of the seal sleeve with a small
amount of light oil. Slide the rotating subassembly
(consisting of rotating element, bellows and re­
tainer) onto the shaft sleeve (29) until the sealing
face is just flush with the undercut end of the
sleeve.
Slide the assembled shaft sleeve and rotating por­
tion of the seal onto the shaft until the seal faces
contact. Continue to press the sleeve onto the
shaft until it is fully seated against the shaft shoul­
der.
Install the seal spring and centering washer. Lubri­
cate the seal as indicated in LUBRICATION after
the impeller is installed.