Finish Thompson DB 11/15 Series - Manual (Page 11)

11
Impeller Replacement
Caution: Do not damage the outer surface of the inner drive
magnet during impeller replacement.
Using the two slots provided, insert a flat blade screw driver
into them and pry the impeller (items 4, 4A) up from the
body of the inner drive magnet (items 5, 5A). Once a gap has
been established, work around the perimeter to evenly increase
the gap until the impeller can be removed. See figure 25.
Section VI - Clamp Ring Replacement & Reassembly
1. Inspect the clamp ring. If clamp ring requires replacement, it
is recommended to remove the plastic foot (Item 11) first.
Note: 100/112 frame B5 adapters do not use the foot. See figures
26 & 27. Remove the 4-M6 bolts (items 24 & 24A).
Figure 26
To install a new impeller, place the inner drive magnet assem-
bly face up (splines facing up) on an arbor press. Align the
spines in the impeller with the ones in the bore on the inner
drive magnet. Place a piece of wood over the top of the
impeller thrust ring. Using an arbor press, push down on the
impeller until it is completely seated in the inner drive.
Figure 25
3. Inspect the motor adapter o-ring (item 8C). If damaged,
replace. If reusable, lubricate it with a chemically compatible
lubricant. See figure 30.
2. Remove the (5) M8 bolts, lock washers & flat washers (items
29, 28 & 27) from the clamp ring (item 8B). See figure 28.
Remove the clamp ring from the motor adapter. There is a
snug fit between the clamp ring & motor adapter due to the
vapor protection o-ring (item 8C). Carefully pull the two parts
apart. See figure 29.
Figure 27
Figure 28 Figure 29
4. Install the new clamp ring. Place the clamp ring on a flat surface.
See figure 31. Align the bolt holes (5 motor adapter and 2 foot bolt
holes) on the clamp ring with the bolt holes on the motor adapter.
Push the motor adapter straight down onto the clamp ring to
seat the o-ring. See figure 32. Install (5) M8 bolts, lock washers
and flat washers (items 29, 28 and 27), and tighten in a star pat-
tern to 130 in-lb (14.7 N-m). See figure 33.
Figure 30
Figure 31 Figure 32 Figure 33
5. For 56C, 145TC and 80 frame B14, re-install the plastic foot
(item 11) to the motor adapter (item 8D). Use the longer M6
bolts, lock washers and flat washers (items 24A, 25 and 26)
for the front bolt holes towards the clamp ring. See figure
34. use the shorter M6 bolts, lock washers and flat washers
(items 24, 25 and 26) for the rear bolt holes towards the mo-
tor face. Note: Nuts (item 30) are glued into the rear of the
motor adapter to help with the installation of the rear bolts.
Make sure the nuts are still in place. See figure 35. Tighten
bolts to 5 ft-lbs. (6.7 N-m). For 184 frame, IEC 90, 100/112
frame B14 and 80/90 frame B5, leave the foot off until the mo-
tor adapter is installed on the motor. This will allow easer ac-
cess to the bottom bolt hole in the motor adapter.
Figure 34 Figure 35
6. Position the motor adapter assembly on a flat surface. If the
foot is installed, allow the feet to hang over the edge. See fig-
ure 36. Install the o-ring (item 8A) into the groove on the
clamp ring. Lubricate the o-ring with a compatible lubricant.
See figure 37. Install the barrier (item 7) into the clamp ring
motor adapter assembly (items 8A, 8B, 8C, 8D, 27, 28, and
29). Push the barrier straight down until it seats in the clamp
ring. See figure 38.
Figure 36 Figure 37 Figure 38