OM--05450
GHS SERIES
PAGE F -- 13
SEAL APPENDIX
Seal Removal
(Figures E-1 and F-5)
See
PUMP DISASSEMBLY
and disassemble the
pump up to and including the
Rotor Adjusting
Sleeve (07)
. As the rotor adjusting sleeve (07AA) is
unscrewed from the backhead (06A), the seat
sleeve (07L) and seal stationary element will be
pulled out with it.
Position the rotor adjusting sleeve assembly on a
flat surface with the seal facing up. Pull the station-
ary element and O-ring from the seat sleeve (07L).
If replacement is required, pry the seat sleeve (07L)
off the bearing retaining nut shoulder. Remove the
O-ring (07B) from the seat sleeve (07L).
Pull the shaft sleeve and rotating seal components
off the shaft as a unit. Slide the rotating element,
bellows, spring and spring seat off the shaft sleeve.
Remove the shaft O-ring (05C).
Continue as required with
PUMP DISASSEMBLY
.
Seal Installation
(Figures E-1 and F-5)
See
Pump Reassembly, Section E
, and as-
semble the housing assembly (04), backhead kit
(06) and rotor/shaft assembly (03).
Clean the seal cavity with a cloth soaked in fresh
cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from flame, sparks, and
excessive heat. Read and follow all pre-
cautions printed on solvent containers.
The seal is not normally reused because wear pat-
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-
gency,
carefully
wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.
Seal components
must
be kept clean.
Handle seal parts with extreme caution to
prevent damage. Use care not to contami-
nate the precision-finished faces; even fin-
gerprints on the faces can shorten seal life.
If necessary to clean the faces, use a clean
cloth and wipe in a circular pattern.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak-
age. If any components are worn, replace the com-
plete seal;
never mix old and new seal parts
.
If a replacement seal is being used, unwrap the
mechanical seal components. Check that the seal
faces are clean, undamaged and free of any for-
eign matter. Set aside and cover the seal stationary
element and O-ring; it will not be used until the rotor
adjusting sleeve kit (07AA) is installed.
Position the pump on a flat surface with the drive
end facing up. Lubricate the shaft O-ring (05C) and
install it in the groove in the shaft.
Slide the shaft sleeve (05A) onto the shaft until it
seats against the shaft shoulder.
Slide the spring seat and spring over the shaft
sleeve (05A) until the spring seat is positioned
squarely against the shoulder on the sleeve. Lubri-
cate the bellows of the rotating portion of the seal
with very light lubricant and position the rotating
portion of the seal on the sleeve with the rotating
element facing up. Slide this rotating subassembly
onto the shaft sleeve until the cage seats squarely
in the seal spring. Push against the rotating portion
of the seal until the I.D. of the rotating element bot-
toms against the step on the sleeve.
NOTE
If too much lubricant was used on the bellows, the
rotating portion of the seal may be pushed off the
larger shaft sleeve diameter by the seal spring. If
this occurs, remove the rotating portion of the seal,
clean any excess oil from the sleeve and bellows,
and reinstall the rotating portion of the seal on the
sleeve.
