Finish Thompson SP22 Series Self-Priming - Manual (Page 11)

11
To separate impeller (item 7A, 7) from the inner drive (item 8A,
8), use two flat head screwdrivers in slots provided to gently pry
apart
Reassembly
1 Install impeller shaft (item 9) into barrier (item 11) by align-
ing the flats on the shaft with the ones in the barrier Make
sure it is completely seated See figure 27
2 Carefully install the impeller/inner drive assembly (items 7A,
7, 8, 8A) by sliding it over the impeller shaft in the barrier
See figure 28
3 Install the inner volute (item 6) by lining up the prongs of the
barrier with the channels in the inner volute Press down
13 Remove the o-ring (item 10) from the barrier and inspect for
chemical attack, swelling, brittleness, cuts, etc
14 Visually inspect the outer drive (item 13) for rubbing, dam-
age, corrosion or loose magnets
For 182, 184, 213 and 215TC frame pumps only, inspect the
o-rings (item 12A, 12B and 14A if applicable) for chemical at-
tack, swelling, brittleness, cuts, etc
Outer Drive Replacement
1 Remove the setscrews (item 13B) from the side of the drive
(NEMA motors) or the bolt, lock washer and flat washer
(items 21, 22, 23) from the center of the drive (metric motors)
WARNING: Be careful, tools will want to be attracted to the
magnets
2 Remove the drive
magnet from the motor
shaft by gently prying up
from the bottom of the
drive See fig ure 22
3 To reinstall the drive or a
new drive follow the instruc-
tions from Section I –
Assembly, Pumps without
Motors, steps 3 & 4
Impeller Thrust Ring
The impeller thrust ring is located in the front of the impeller
shroud and is held in place with a snap-fit ridge
Removal
1 Using a razor knife or side cutters, cut a notch out of the
thrust ring Pull up and out of the holder See figures 23 and 24
NOTE: A new impeller thrust ring will be required after removal
Replacement
1 Place the impeller and impeller drive assembly (items 7, 7A,
8 & 8A) on a table with the eye of the impeller facing up
2 Position the replacement impeller thrust ring in the bore of
the front shroud with the snap fit ridge towards the bottom
of the bore Align the anti-rotation flat on the impeller thrust
ring with the flat in the impeller shroud
3 Place the impeller and impeller drive assembly in an arbor
press Using a soft faced arbor, gently press the impeller
thrust ring into place
Impeller Bushing
Removal
1 To remove the bushing, place the impeller/inner drive as-
sembly (items 7, 7A, 8 & 8A) with the impeller facing up in
an arbor press If necessary support the bottom of the as-
sembly with blocks to allow the bushing to fall out Insert
a 1” (25 4 mm) diameter plastic or wooden shaft through the
impeller and press bushing out See figure 25
2 To replace bushing, place the assembly on a flat surface
with the impeller thrust ring face down With the slotted face
of the bushing facing the rear of the inner drive, align the flat
in the bushing with the flat in the inner drive magnet See
figure 26 Gently push until bushing bottoms out
Impeller Disassembly
Figure 22
Figure 23 Figure 24
Figure 25
Figure 26
Figure 27
Figure 28