Xylem Bell & Gossett VSC Series Instruction Manual

Assembly procedure for
Single Flush Mechanical Seal
VSC and VSCS Pumps
WARNING: This product can expose you to chemicals including Lead, which
is known to the State of California to cause cancer and birth defects or other
reproductive harm. For more information go to: www.P65Warnings.ca.gov.
NOTE: Refer to pump instruction manual for complete assem-
bly instructions.
Clean shaft sleeve and pump shaft so that assembly can be
completed without damaging the seal parts.
Remove O ring from its position in the shaft and replace with
new O ring provided. Lubricate O ring on stationary seal seat
(carbon) with silicone grease or soapy water. Apply silicone
grease at O ring surface only. Do not apply any grease or lubri-
cant at seal mating face. Do not use petroleum lubricant!
Position in seal housing. Position shaft sleeve in drive collar
and tighten two dog point set screws in holes provided. Set
sleeve and collar assembly on end and place assembly aid
spacer around shaft sleeve and position against drive collar.
Place seal housing with stationary seat over end of sleeve
against assembly aid spacer. Lubricate O ring in rotating seal
INSTRUCTION MANUAL
assembly with silicone grease or soapy water. Do not use
petroleum lubricant! Slip it over end of shaft sleeve and posi-
tion against stationary seal carbon ring. Compress rotating
seal assembly to required working length by measuring 1/4"
space between seal parts that house compression springs and
tighten set screws. Seal is now adjusted for proper working
length and is ready for installation in the pump.
Apply anti-seize compound to shaft, place seal housing
gasket in position and slide complete assembly over pump
shaft. Assemble bearing housing and ball bearing to pump
shaft and properly locate and lock in position. Push sleeve and
collar assembly to its final position against stuffing box bracket
and bolt in place. Tighten drive collar set screws in undercut of
shaft. Remove assembly aid spacer.
P85505C