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Model CDMD
I&O IN-159
Before attempting any repairs under warranty, contact Distributor to obtain factory authorization. Repairs
carried out without authorization may void warranty. Many causes of pump system failure are due to improper
system design. Refer to the Trouble Shooting List in this manual before carrying out pump inspection.
DISASSEMBLY
1. Disconnect power source
from motor.
2. Disconnect electrical
connections, tagging wires
carefully to preserve correct
rotation. Loosen pump base.
3. Remove pump and motor
assembly to repair area.
Observe position of all parts
prior to disassembly.
4. Remove magnet drive
housing (U) from motor and
outboard magnet assembly
by removing 4 each of 3/8 x
16 motor bolts (V).
5 Remove drive housing (U)
from the pump end by
removing eight Allen head
1/4-20 x 7/8” bolts (O).
6. Lift off magnet cup (T)
which covers drive magnet
assembly (Y).
7. Remove magnet cup (R) O-
ring from back of separator
plate (H). Remove eight
Allen head 1/4 - 20 x 5/8”
bolts which secure separator
plate to pump volute (P).
8. Lift separator plate (H) away
from pump volute by holding
down pump discharge and
lifting on magnet assembly
(S).
9. Remove volute O-ring (Q).
10. Remove impeller lock-down
bolt (1/4 x20 x 1/2” hex) (D)
and lockdown washer (E).
11. Slide impeller (C) off shaft
and remove shaft key (G).
12. Slide magnet (S) and shaft
assembly out of the bushings.
Remove hex bolt (D) (1/4 x
20 x 12”) and flat washer (E)
which secure magnet
assembly to shaft.
13 Remove shaft (F) and thrust
washer (N) from magnet
assembly.
14. Loosen both setscrews (L)
which secure the Bushing
sleeve (J) into the separator
plate using 1/8” Allen
wrench. Remove the
bushing assembly.
15. Pull bushings (M) from
bushing sleeve (J) . Remove
bushing key.
REASSEMBLY
1. Insert bushing Key into
keyway on bushing sleeve.
Press bushings into bushing
sleeve making sure to align
keyway.
2. Press bushing Sleeve (J) into
magnet separator plate (H).
Lightly tighten one of the
setscrews (L) in the magnet
separator plate (H). This will
hold the bushing sleeve in
place during assembly. Set
this assembly aside.
3. Install one thrust washer (N)
onto pump shaft fitting the
matching “D” flat. Now
Slide the driven (internal)
magnet (S) onto the shaft,
remembering to install shaft
key (G) into the shaft
keyway. Note that shaft ends
are identical and it can be
installed in either direction.
Screw the retaining bolt (1/4
x 20 x 1/2” hex (D) head and
washer (E)) into the end of
the shaft to secure the
magnet. Do not overtighten.
4. Slide shaft and magnet
assembly into the bushing
and separator plate assembly
and lay entire assembly on
the magnet so the shaft is
protruding out the top.
5. Place the front thrust washer
(N) on the shaft making sure
to align the D-drive flats.
6. Slide the impeller (C) onto
the shaft (F) and insert the
shaft key (G).
7. Insert the impeller lockdown
(1/4 - 20 x 1/2” hex bolt (D)
and flat washer (E)) into the
front end of the shaft and
tighten both the impeller and
magnet lockdowns to 6-10
ft/lbs by grasping the magnet.
Do not grasp the impeller!
The edges are sharp!
8. Loosen the setscrew (L) that
is securing the bushing
