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Using a good quality dielectric
oil, lube the rubber material on
the carbon seal assembly and
press it on the shaft. Place the
spring and the seal retainer on
the shaft as removed. Replace the
snap ring.
Carefully place the seal housing
onto the seal bearing plate,
re place the cap screws, and
evenly tighten.
Using a pressure gauge with a
fill stem, pres sur ize the motor
housing to no more than 7 psi
with dried air and check for
leaks. If after several minutes the
gauge reads the same, the seal
is good and you can con tin ue
with assembly.
NOTE: It is normal to observe
some air bubbles in the seal area
initially as the seal seats. If the
bubbles do not stop within a few
seconds, the seal is either not
properly installed or is damaged.
Following the same procedure
outlined previously to install the
lower seal assembly. Re place
the impeller using a re mov able
locking adhesive.
Reassemble the propeller set
screw onto mixer.
Refill all cham bers with a good
quality di elec tric oil. Fill the
motor housing so that the tops
of the motor windings have been
covered (2500 ml), but leave an
air gap to allow for ex pan sion of
the oil. Fill the seal chamber with
700 ml of oil so that an air gap
also exists.
4
Troubleshooting
Below is a list of troubles and
their probable causes:
Insufficient mixing
1. Mixer orientation
needs adjusted
2. Wrong rotation
3. Speed too low
Mixer overloads motor
1. Wrong rotation
2. Specific gravity or vis cos i ty
of liquid too high
3. Speed too high
4. Mixer clogged
5. Defective bearings
Mixer is noisy
1. Defective bearings
2. No axial clearance be tween
propeller and seal housing
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