Flowserve Guardian Sealless Metallic - Manual (Page 48)

GUARDIAN USER INSTRUCTIONS ENGLISH 71569212 08-11
Page 48 of 68 flowserve.com
c) Place a new bearing cover/bearing housing O-
ring [4610.2] in the bearing cover [3260] and
temporarily hold it in place with a small amount of
grease. Place the bearing cover [3260] onto the
bearing housing and secure it with the three (3)
bearing cover fasteners [6570.3]. Make sure the
bearing housing drain plug [6569.1] is in place in
the bearing housing.
d) Remove any material that has been attracted to
the outer magnet assembly. There are close
clearances between the rotating magnetic
assembly and adjacent stationary parts. For
reliability, it is important that foreign matter be
removed.
e) Attach the outer magnet flange [231] to the outer
magnet [230] using hex head cap screws
[6570.7]. Screw the outer magnet flange
assembly [230/231] onto the drive shaft [2100.2].
Mount the drive shaft/coupling key [6700] and a
Durco impeller wrench on the shaft. Using
gloves, grasp the magnet firmly and with the
wrench handle pointing to the left when viewed
from the magnet side of the bearing housing
[3200], spin the outer magnet and flange
assembly rapidly in a clockwise direction to
impact the impeller wrench handle on the work
surface to the right. After several sharp raps, the
outer magnet assembly should be tight.
The threads are right hand.
f) Insert the socket head cap screw [6570.8] into
the center of the outer magnet flange and tighten.
(The threads are right hand.)
g) The assembly of the power end is complete.
6.9.1.3
Labyrinth seals
The following are general installation instructions
regarding the VBXX Inpro seal. Follow the
instructions provided with the seal by the
manufacturer.
The elastomer O-ring located on the OD of the seal
has been sized to overfill the groove in which it is
located. When installing the seal into its
corresponding housing, in addition to compressing
the o-ring a certain amount of material may shear off.
This sheared material should be removed. An arbor
press should be used to install the seal.
Install the inboard seal in the bore of the bearing
housing with the single expulsion port positioned at
the 6 o’clock position.
Install the outboard seal in the bore of the bearing
cap with the single expulsion port positioned at the 6
o’clock position.
6.9.1.4 Magnetic seals
Follow the installation instructions provided by the
manufacturer.
6.9.1.5
Outer magnet/motor assembly – close-
coupled Guardian
a) Attach the new motor gasket [4590.8] to the
motor flange [251].
b) Mount the motor flange [251] onto the motor and
secure it with the four (4) motor flange/motor
fasteners [6570.11]. (See Figure 6-27.)
Figure 6-27: Motor flange/motor assembly
c) Attach the hub [245] to the outer magnet
assembly [230/231] using the four (4) hub
fasteners. (See Figure 6-22.)
d) Place the key on the motor shaft and mount the
outer magnet assembly [230/231] to the motor
shaft by sliding the attached hub [245] over the
motor shaft. It is critical that the face of the motor
shaft contact the outer magnet flange [231]. This
ensures the proper axial location of the outer
magnet assembly. (See Figure 6-22.)
e) Tighten the set screw into the hub to secure the
outer magnet assembly [230/231] to the motor
shaft.
6.9.2
Wet end assembly
a) To place the inboard, (T-shaped) bushing [212] in
the bearing holder [3830] properly, use grease,
silicone or other process compatible lubricant to
temporarily hold the bushing in place. Put grease
on the back side of the thrust face (the flat face).
This is done to hold the bushing in place when the
pump shaft is inserted through the bushings. Align
the bushing with the bearing bore and insert it as
straight as possible. Make sure both pins rest in the
groove on the back face of the bushing. Avoid
cocking the bearings in order to prevent damage
during installation. If the bushings do not go in
easily, remove the bushing gently and try again. If
the bushing still does not slide in, check for any
burrs or nicks that may be present in the bearing
holder and remove them with sandpaper.