OM-05450
GHS SERIES
PAGE F - 5
SEAL APPENDIX
Seal Removal
(Figures E‐1 and F‐2)
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 seal
stationary element will remain inside the seat
sleeve (07S).
Remove the seal stationary element and O‐ring
from the seat sleeve.
Use caution
not to damage
the stationary element sealing face.
If the seat sleeve (07S) requires replacement, pry
the sleeve off the O.D. of the bearing retaining nut
(07AD).
Remove the pipe plugs (P) from the seat sleeve
(07L). Reach through the pipe plug hole with an al
len wrench and loosen the setscrews in the rotat
ing portion of the seal assembly (05).
Reach through the backhead (06A) and pry the
seat sleeve (07L) loose from the backhead. Pull the
seat sleeve and rotating portion of the seal out of
the backhead. Remove the O‐rings (07F and 07V)
from the seat sleeve.
Remove the shaft clip (07H) if replacement is nec
essary.
Continue as required with
PUMP DISASSEMBLY
.
Seal Installation
(Figures E‐1 and F‐2)
See
PUMP REASSEMBLY
, and assemble the
housing assembly (04), backhead kit (06) and ro
tor/shaft assembly (03).
Clean the seal cavity and shaft 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 (07AA) is installed.
If removed, install new O‐rings (07F and 07V) in the
grooves in the seat sleeve (07L). Press the sleeve
into the backhead until fully seated against the
backhead.
Position the pump on a flat surface with the drive
end facing up. If removed, install the clip (07H) in
the groove in the shaft.
Lightly oil the shaft of the rotor/shaft assembly
(03A). Position the rotating portion of the seal on
the shaft with the sealing face up. Place a clean tis
sue over the sealing face of this rotating subas
sembly and slide it onto the shaft until fully seated
against the shaft clip (07H).
Reach through the pipe plug hole in the seat sleeve
(07L) with an allen wrench and tighten the set
screws securing the rotating portion of the seal as
sembly (05) to the shaft. Reinstall the pipe plug (P)
in the seat sleeve (07L).
