25
n
1. After separating impeller from magent capsule, pre-
pare a rod with slightly smaller outside diameter than
the bearing (6), and a hand press.
2. Warm magnet capsule assembly (4) in hot water of
194° F (90° C) for approximately 20 minutes.
3. Place magnet capsule on the hand press with the im-
peller side upward. Put the rod on the bearing face.
Slowly remove the bearing from magnet capsule by
pressing the rod.
4. Place magnet capsule (impeller side) face down. Place
and align new bearing and the rod on magnet cap-
sule. Insert new bearing into magnet capsule by press-
ing the rod. If magnet capsule has cooled too much
by this time to insert the new bearing smoothly, warm
it again in the same manner as described above.
5. Make sure that bearing is seated at the top of the
capsule and protrudes from the bottom of magnet
capsule.
Fig. 12
Bearing (MDH-(F)422/423/425):
1. Separate the impeller from magnet capsule by unscrewing it
counterclockwise (from impeller side). Note: If the impeller
cannot be removed by unscrewing it, place the impeller and
magnet capsule in hot water of 194°F (90°C) for 5 minutes,
then repeat step 1.
2. Warm the magnet capsule assembly (4) in hot water of 194°F
(90°C) for approximately 20 minutes.
3. Place the magnet capsule on the hand press with the impeller
side face down. Place a rod, which has a slightly smaller
outside diameter than that of the bearing, on the bearing face.
Slowly remove the bearing from the magnet capsule by
pressing the rod.
Fig. 13
7. Extract drive magnet assembly from motor shaft, using a puller or a screwdriver as a handspike. Keep it free
of all metal chips and particulate.
n
Replacement of Bearing and Mouth Ring
Bearing (MDH-(F)400/401):
M A G N E T C A P S U L E
.0 5 9 in . (1 .5 m m ) fo r M D H -(F )4 0 0
.0 3 9 in . (1 .0 m m ) fo r M D H -(F )4 0 1
B e a rin g
