S SERIES PUMPS
OM-07089
MAINTENANCE AND REPAIR
PAGE E - 14
surface damage. Because the rotating element
may not stay in the bellows retainer when turned
upside down, place a
small
amount of grease at
equal spaces on the back of the element and posi
tion it in the bellows retainer. The grease should
hold the element in position until the seal is in
stalled. Assemble the drive grooves of the rotating
element into the drive lugs of the bellows retainer.
Apply a
light
coating of oil to the seal seating sur
face on the shaft, the groove for the retaining ring
(33), and I.D. of the bellows. Inspect the seal face to
ensure that it is clean and dry. If cleaning is neces
sary, use a clean tissue to wipe in a circular pattern.
Slide the seal rotating portion onto the lubricated
shaft as shown in Figure E-6. Apply firm, steady
pressure on the seal retainer until it slides down the
shaft. This step should be done in one continuous
motion to prevent the bellows from sticking or roll
ing as it passes over the retaining ring groove.
Slide the seal spring over the shaft and bellows re
tainer, and install the spring retainer. Install the seal
retaining ring (33). See Figure E-6 for the proper
order of seal assembly.
Lower Seal Installation
(Figures E-1 and E-6)
Thoroughly clean the O‐ring surfaces and seal
bore of the seal plate (52). The seal bore must be
free of burrs and nicks which could damage the
seal. Inspect the seal plate for cracks, distortion, or
erosion and replace it if defective.
If the wear ring (11) was removed from the seal
plate, position the replacement ring in the bore with
the chamfer on the O.D. toward the inside. Press
the wear ring into the seal plate until fully seated.
Be sure the ring seats squarely in the seal plate
bore.
NOTE
The wear ring
must
seat squarely in the seal plate;
otherwise, binding and/or excessive wear will oc
cur as the shaft turns.
Unpack the stationary seat, and check that the O‐
rings are properly installed (see Figure E-6).
Press the stationary element into the seat, making
sure that the grooves in the element engage the
lugs on the seat. Apply a
light
coating of oil to the
seal plate bore and the outer O‐ring. Keep the seal
ing face dry.
Position the seal plate on a clean flat surface with
the impeller side up.
Unpack the stationary seat and element. Subas
semble the stationary element in the stationary
seat. Apply a
light
coating of oil to the seal plate
bore and the O.D. of the seal seat and O‐ring. Keep
the sealing face dry.
Position the subassembly in the seal plate bore,
and cover it with a clean tissue. Use your thumbs to
press the seat into the bore. Apply equal pressure
on opposite sides of the seat until it is fully seated in
the bore. Remove the tissue and inspect the seal
face to ensure that it is clean and dry. If cleaning is
necessary, use clean tissue to wipe
lightly
in a cir
cular pattern.
NOTE
When pressing seal components onto the rotor
shaft, use hand pressure only. A push tube cut from
a length of plastic pipe will aid in installing seal
components. The I.D. of the push tube should be
approximately the same as the I.D. of the seal
spring.
Lubricate the seal plate O‐ring (51) and install it on
the seal plate. Lightly oil the O‐ring seating surface
on the intermediate and carefully position the seal
plate and stationary seal components on the rotor
shaft and against the intermediate.
Be careful
not
to damage the stationary element already in
stalled.
Unpack the rotating portion of the seal. Be certain
the seal face of the rotating element is free of grit or
surface damage. Because the rotating element
may not stay in the bellows retainer when turned
upside down, place a
small
amount of grease at
equal spaces on the back of the element and posi
tion it in the bellows retainer. The grease should
hold the element in position until the seal is in
stalled. Assemble the drive grooves of the rotating
element into the drive lugs of the bellows retainer.
Apply a
light
coating of oil on the shaft and the I.D.
of the bellows.
Slide the seal rotating portion onto the lubricated
shaft with the seal face down. Apply firm, steady
