Finish Thompson KC 5.5, 6, 6H, 7, 8, & 10 SERIES User Manual

Page 2

For 71 and 80 frame - Align the cone point set screw (item

6B) on the motor shaft and slide the drive magnet assembly

(item 6) onto the motor shaft. Adjust the drive so that it is

1.016 mm (.040 + or -.005) below the face of the motor

adapter (see figure 2). Tighten both setscrews with a 5/32”

Allen wrench to 7.9 N-m (70 in-lbs.).

6. Place the impeller assembly (comprised of items 2 and 3) in

barrier (item 4). Grasping the barrier at opposite bolt tabs,

carefully lower the barrier assembly into the motor adapter/

drive assembly. Line up the tabs of the barrier between the

tabs on the motor adapter to avoid pinching fingers. Once

seated, rotate the barrier until bolt holes line up.

7. Install the o-ring (item 7) on the barrier. Lubricate the o-ring

with a compatible lubricant to facilitate installation.

8. Place the impeller housing (item 1) on the barrier being

careful not to dislodge the o-ring.

9. Align mounting holes and install 6 mounting screws and

washers (items 9A, 9B & 9C) from hardware package. Hand-

tighten screws using pattern shown in Figure 3.

Manually rotate the pump assembly to ensure that the pump

is not binding or rubbing on the drive magnet assembly.

INSTALLATION

MOUNTING

Motor should be securely fastened.
PIPING

Figure 3

Figure 2

Note: Prior to start-up, double check the two set screws to as-

sure that they are firmly tightened. Failure to do so could result

in internal damage. Rotate to assure clearance with the motor

adapter.

WARNING: Magnets are strong. To avoid damage and

pinching fingers, tightly grasp pump assembly keeping

finger tips away from the area where the housing and

motor adapter meet.

CAUTION: Do not operate/test the motor with the drive magnet

assembly exposed.
CAUTION: Drive magnets MUST be free of metal chips.

10. Install pump into the system according to installation

instructions.

1. Support piping near the pump to eliminate any strain on

the pump casings.

2. Do not overtighten the piping on the discharge on initial

installation (i.e., down to the o-ring). Damage to the

discharge can occur. The o-ring is used only when there

is wear and the plastic threads are loose.

3. To minimize head loss from friction:

a. Increase pipe size by 1 diameter.

b. Use minimal number of pipe bends.

4. Keep bends and valves a minimum of 10 pipe diameters from

the suction and discharge.

5. Position pump as close to the liquid source as possible.
6. Maintain a flooded suction (liquid above pump prior to

being primed).

7. Ensure that the piping does not leak and suction is not

prone to clogging.

8. If flexible hose is preferred, use a reinforced hose rated for the

proper temperature and pressure. This helps avoid collapse or

kinks.

9. Install valves on suction and discharge lines (a minimum of 10

pipe diameters from the pump).

10. For units in a suction lift system, install appropriate piping in

the discharge to allow priming of the pump.

11. The suction valve should be completely open to avoid

restricting suction flow.

CAUTION: To stop the pump if prime is lost, use one of the

following: (1) pressure switch on the discharge, (2) vacuum

switch on the suction, (3) a motor minder to monitor motor

current.

with the key slot on the shaft adapter and slide the drive

magnet assembly (item 6) on. Adjust the drive magnet

assembly (item 6) so that it is 1.016 mm (.040 +/- .005)

below the face of the motor adapter (see figure 2) and

tighten both setscrews with a 5/32” Allen wrench to 7.9 N.m

(70 in. lbs.).

TRAIGHT

EDGE

DRIVE

MAGNET

ASSY

.040