Gorman-Rupp Pumps SFV4A-X 1531245 and up - Manual (Page 43)

SFV SERIES X‐PROOF PUMPS OM-06628
MAINTENANCE AND REPAIR PAGE E - 20
NOTE
If the seal plate was not removed during disassem­
bly, cover the stationary element with a clean tissue
and use your thumbs to press the seal stationary
seat and O‐ring into the seal plate as described
above. Remove the tissue and inspect the seal face
to ensure that it is clean and dry.
Install a new O‐ring on the shoulder of the interme­
diate.
Carefully position the seal plate and stationary seal
components on the rotor shaft. Align the holes in
the seal plate for the capscrews with those in the
intermediate and slide the seal plate onto the shaft
until fully seated against the intermediate. Be care­
ful not to damage the stationary seat already
installed in the seal plate. Secure the seal plate to
the intermediate with the flat head capscrews.
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.
Lubricate the I.D. of the bellows with water and
slide the rotating subassembly over the shaft
sleeve until the seal face is just flush with the under­
cut end of the sleeve.
Slide the assembled shaft sleeve and rotating por­
tion of the seal and onto the rotor shaft until the pol­
ished faces contact. Continue to push the sleeve
through the seal until it is fully seated against the
shaft shoulder.
Install the seal spring over the bellows retainer and
install the spring retainer. See Figure E-3 for prop­
er order of seal assembly.
Seal Installation (No Shaft Sleeve)
Thoroughly clean the O‐ring surfaces and seal
bore of the seal plate. The seal bore must be free of
burrs and nicks which could damage the seal. In­
spect the seal plate for cracks, distortion, or ero­
sion and replace it if defective.
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 stationary seat. 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.
Install a new O‐ring on the shoulder of the interme­
diate.
Carefully position the seal plate and stationary seal
components on the rotor shaft. Align the holes in
the seal plate for the flat head capscrews with
those in the intermediate and slide the seal plate
onto the shaft until fully seated against the inter­
mediate. Be careful not to damage the stationary
element already installed in the seal plate. Secure
the seal plate to the intermediate by torquing the
flat head capscrews to the value shown in Table
E-1.
NOTE
If the seal plate was not removed during disassem­
bly, cover the stationary element with a clean tissue
and use your thumbs to press the seal stationary
seat and element into the seal plate as described
above. Remove the tissue and inspect the seal face
to ensure that it is clean and dry.
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.