Section
T51 • E51
Page 511
Dated
February 2014
Figure 4-5
C3 - D3 VERTICAL FLANGE
MOUNT PUMP
15
14
1
7
125
12
23
11
23A
60
19
2
18
20
8
T51 C3
3. Remove the cover. In some
cases light tapping with a plastic
or wooden mallet on the outside
diameter of the cover may be
required to loosen it from the
motor bracket. Care should be
taken if a screwdriver is needed to
pry between the cover and motor
bracket. Damage to the “O” ring
(#7) and/or impeller (#11) can
result.
4. Remove the impeller(#11), refer to
Figure 4-11. This is easily done
by setting the motor on end. The
impeller is a slip fit and under nor
-
mal conditions, can be removed
by hand or by gently tapping on
the end of the shaft with a mal-
let. Striking the shaft too hard
could damage the seat, rotat-
ing element, or the motor. After
removing the impeller, the impeller
key (#23) needs to be removed
from the shaft keyway.
5. Remove the snap ring (#4) from
the shaft; note the spring that is
held in place by the snap ring.
Remove the spring from the shaft.
6. To remove the rotating element
(#12), gently slide the motor
bracket (#1) forward on the shaft
to move the rotating element
high enough to be removed by
hand. Using tools on the rotating
element may damage the rotating
element or the seat. Take precau-
tions to keep the rotating element
clean if it is to be reused.
7. Next remove the motor bracket.
8. To remove the seat (#125). Refer
to Figure 4-12. Place the motor
bracket face down on a clean flat
surface. Look into the opening in
the center of the motor bracket,
and you will see a portion of the
seat. Insert the 1” dowel and,
very gently, tap the seat until it
drops out. Care must be taken
with the seat. It is often a brittle
material and is prone to breakage.
It is
recommended that a new
replacement seat be installed
during reassembly.
4E Inspection of Components
Thoroughly clean all parts. All
components should be examined for
wear and corrosion. Replace any
parts that show visible wear. If the
pump was not producing sufficient
pressure or capacity, the clearances
between the casing and impeller
probably exceed the maximum al-
lowable clearance. At minimum, the
impeller should be replaced in this
case. If the total side running clear-
ance for an impeller exceeds .007”, it
is unlikely that pump performance will
reach that of a new pump except at
lower discharge pressures.
The “O” rings and other elastomeric
components should be replaced if
they have been deformed or cut.
If seal components must be reused,
carefully inspect for microscopic
E51 D3
17
125
12
11
23
T51
E51
Figure 4-11
Figure 4-12
NAME/DESCRIPTION
PART NO. QTY.
Motor Bracket
1
1
Cover/Vertical
2
1
“O” Ring/Casing
7
1
“O” Ring/Guide Rod
8
4
Impeller
11
1
Snap Ring
4
1
Seal Rotating Element
12
1
Seal Stationary Seat
125
1
Lock Collar/Sleeve
14
1
Setscrew/Lock Collar
15
2
Shaft Sleeve
17
1
Guide Rod
18
2
ThruBolt
19
2
Nut
20
2
Pipe Plug/Drain
22
1
Key/Impeller Drive
23
1
Key/Sleeve Drive
23A
1
Gasket
60
1
4
