Finish Thompson DB 11/15 Series - Manual (Page 9)

9
1. Stop the pump, lock out the motor starter, close all the
valves that are connected to the pump, and drain/decon-
taminate the pump.
WARNING: The pump must be thoroughly flushed of any
hazardous materials and all internal pressure relieved prior
to opening the pump. Allow the pump to reach ambient
temperatures prior to performing maintenance.
Section V - Disassembly
WARNING: Rotating Parts. This pump has components
that rotate while in operation. Follow local safety stand-
ards for locking out the motor from the power supply
during maintenance or service.
2. For pumps with motors 2 horsepower (1.5 kW) or smaller,
securely clamp the pump feet to the bench. Remove the
(4) bolts, lock washers and flat washers (items 15,16,17)
securing the pump to the motor. See figure 9.
4. Pull housing (item 1) straight up to remove. Inspect
housing for signs of wear or damage. Look for signs of
rubbing, cracking on thrust ring, or damage to front shaft
support. See figure 14.
5. Remove impeller/inner drive assembly (items 4A, 4, 5, 5A).
Inspect impeller and drive for signs of wear or damage.
Look for signs of rubbing or damage and wear to the im-
peller and inner drive. See figure 15.
WARNING: Chemical Hazard. This pump is used for trans-
ferring many types of potentially dangerous chemicals.
Always wear protective clothing, eye protection and follow
standard safety procedures when handling corrosive or per-
sonally harmful materials. Proper procedures should be fol-
lowed for draining and decontaminating the pump before
disassembly and inspection of the pump. There may be small
quantities of chemicals present during inspection.
WARNING: Magnetic force hazard. This pump should only
be disassembled and assembled using the recommended
procedures. The magnetic attraction is powerful enough to
rapidly pull the motor end and the wet end together. Do not
place fingers between the mating surfaces of the motor and
wet ends to avoid injuries. Keep the drive magnet and impeller
assembly away from metal chips or particles.
Figure 9
Figure 12
Figure 13
Figure 14
Figure 15
Firmly grab the motor and pull straight back to disengage
the motor and pump. See figure 11. For pumps with mo
3. Place pump on bench with housing facing up. Remove
(8) 10 mm housing bolts, lock washers and flat washers
(items 12, 13, 14). See figure 13.
tors 3 HP (2.2 kW) or larger, place the pump and motor
on the floor. Remove the (4) bolts, lock washers and flat
washers (items 15,16,17) securing the pump to the mo-
tor. See figure 9. Make sure the motor is on the fan end
with the pump facing up. Pull straight up to remove the
pump from the motor. See figure 12.
Figure 11