OM-06259
S SERIES PUMPS
PAGE E - 11
MAINTENANCE AND REPAIR
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
(35), 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.
Positions the seal rotating portion on the lubricated
shaft as shown in Figure E-3. Apply firm, steady
pressure on the seal retainer and slide it down the
shaft in one smooth motion until the seal faces con
tact.
Use caution
not to roll or cut the bellows on
the groove for the retaining ring.
Slide the seal spring over the shaft and bellows re
tainer, and install the spring retainer. Install the seal
retaining ring (35). See Figure E-3 for the proper
order of seal assembly.
Lower Seal Installation
(Figures E-1 and E-3)
Thoroughly clean the gasket surfaces and seal
bore of the seal plate (49). 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 removed, press a replacement wear ring (65) into
the seal plate bore with the chamfered end
toward
the inside
of the seal plate. Be sure the ring seats
squarely against the bore shoulder.
The wear ring
must
seat squarely in the
seal plate bore or binding and/or exces
sive wear will result.
Coat the seal plate O‐ring (8) with light oil and in
stall it on the seal plate. 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 of the seal seat. Keep the
sealing face dry.
Position this subassembly in the seal plate bore
with the sealing face up, 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 circular 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.
Carefully position the seal plate and stationary seal
components over the rotor shaft and against the in
termediate.
Be careful
not to damage the station
ary element already installed. Secure the seal plate
to the intermediate using the socket head caps
crews (51).
Unpack the rotating portion of the seal. Be certain
the seal face of the rotating element is free of grit or
surface damage. If the rotating element does not
want to 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.
Positions the seal rotating portion on the lubricated
shaft as shown in Figure E-3. Apply firm, steady
pressure on the seal retainer and slide it down the
shaft until the seal faces contact.
Slide the seal spring over the shaft and bellows re
tainer and install the spring retainer. See Figure
E-3 for proper order of seal assembly.
Impeller Installation
(Figure E-1)
Inspect the impeller (2) for cracks, broken vanes,
or wear from erosion, and replace it if damaged.
Clean the threads on the rotor shaft to remove any
old thread locking material.
Be sure the impeller bore and the shaft are free of
oily film and completely dry.
Do not
apply lubri
