Finish Thompson UC - Manual (Page 11)

11
Shutdown
Use the following procedures to shut the pump down.
1. Slowly close the discharge valve .
2. Shut off the motor.
3. Close the suction valve.
Disassembly/Reassembly
Disassembly
Pump End
WARNING: Rotating Parts. This pump has components that rotate while in operation. Follow local safety
standards for locking out the motor from the power supply during maintenance or service.
WARNING: Chemical Hazard. This pump is used for transferring many types of potentially dangerous chemicals.
Always wear protective clothing, eye protection and follow standard safety procedures when handling corrosive or personally
harmful materials. Proper procedures should be followed for draining and decontaminating the pump before disassembly and
inspection of the pump. There may be small quantities of chemicals present during inspection.
WARNING: The pump must be thoroughly flushed of any hazardous materials and all internal pressure relieved prior to
opening the pump.
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. ALWAYS use
the jackscrews (item 14) to assemble/disassemble the pump. 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 10
figure 11
figure 12
1. Stop the pump, lock out the motor starter, close all the valves that are connected to
the pump, and drain/decontaminate the pump. The ULTRAChem is supplied with a casing
drain to help drain and decontaminate the pump. If the drain flange has been removed to
drain/decontaminate the pump, reinstall the flange (item 11) and use a new gasket (item
11A). Torque the two flange bolts (¼”) (item 11B) to 20 ft-lbs (27.1 N-m).
2. Allow the pump to reach ambient temperatures prior to performing maintenance.
3. Remove the mounting bolts that attach the motor to the base, if any. Using a ¾”
socket, remove the (4) ½” bolts (item 15) that secure the motor adapter (item 9) to the
clamp ring (item 7). See figure 10.
4. Separate the magnetic coupling between the drive end and the pump end by using
the (3) jackscrews (item 14). Using a ¾” socket turn the jackscrews clockwise. Be sure to
turn the jackscrews evenly. Turn the jackscrews until they are fully extended. See figure 11.
CAUTION: After removal of the drive end, the jackscrews should be left fully
engaged in the adapter to prevent accidental attraction of the magnetic coupling.
5. Using a 9/16” socket, remove the (12) 3/8” hex head bolts (item 13) that connect the clamp
ring to the casing (item 1). See figure 12.
6. Remove the clamp ring from the back of the barrier assembly (item 6).
7. Place the casing/barrier assembly on a table with the suction flange of the casing
facing down. Carefully remove the barrier assembly from the casing. It may be necessary to
gently pry with a flat blade screwdriver between the barrier assembly and the casing to help
loosen the o-ring fit. When pulling the barrier assembly out of the casing, the shaft and the
impeller will normally be left in the casing. Occasionally the shaft will stick in the barrier.
If this happens, make sure that the shaft does not drop out when the barrier assembly is
removed or damage may result.