Finish Thompson VKC5.5, VKC6, VKC6H, VKC7, VKC8 User Manual
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ASSEMBLY
VKC5.5,6,6H, 7,8,10 SERIES
Sealless Non-Metallic Vertical Pumps
Installation and Maintenance Instructions
Pat.No. 5,708,313
WARNING: Magnetic field hazard. This pump contains powerful
rare earth magnets. When the pump is disassembled (not
connected to a motor) and the magnets are exposed, these
magnets produce powerful magnetic fields. Individuals with
cardiac pacemakers, implanted defibrillators, other electronic
medical devices, metallic prosthetic heart valves, internal wound
clips (from surgery), metallic prosthetic devices or sickl cell
anemia must not handle or be in the proximity of the magnets
contained inside the pump. Consult a health care provider for
specific recommendations before working with this pump.
PUMPS WITH MOTORS
1. No assembly required. Simply unpack the pump and motor and examine for any signs of shipping damage. If damage is detected, save
the packaging and notify the carrier immediately.
2. Ensure that lock rings are securely snapped in place and did not loosen
during shipment.
3. To install the pump into the system, follow the installation instructions
provided.
PUMPS WITHOUT MOTORS
Note: Finish Thompson has added extra weight (Flywheel item 35 in
Figure 8) to several of our VKC Series Pumps to slow down motor start
up & prevent possible magnet decoupling. It is necessary to know
whether your pump was supplied with the flywheel. Flywheels are supplied with all VKC8 (54”- 60”) & All VKC10 pumps both 56C NEMA & 80
Metric frame motor adapters. If you are unsure whether your pump was
supplied with a flywheel please contact our Tech Service Department at
PH: 800-888-3743 or email techservice@finishthompson.com.
Note: motor assembly videos are available on line at http://www.Finishthompson.Com/downloads/maintenance-videos/
FOR 56C FRAME VKC5.5,6,6H, 7 AND 8 PUMP ADAPTERS
WITHOUT FLYWHEELS [12” - 48” (30-
122 cm)]. USE FIGURE 7.
1. Unpack the pump and any supplied accessories and examine for damage. If damage is detected, save the packaging and notify the carrier
immediately.
2. Prepare to assemble the pump onto the motor by placing the motor
on the fan cover on a suitable clean, level work surface.
3. Slide the supplied coupling half (metal half of item 27 in figure 7)
onto the motor shaft with the splined side facing the pump. Adjust the
coupling half so that the motor shaft is recessed 7/32” below the top
of the coupling. Insert the motor shaft key in the slot and tighten both
setscrews with a 1/8” Allen wrench to 70 in-lbs.
4. Install the coupling insert (yellow internally splined plastic sleeve)
onto the coupling half on the motor shaft. Carefully slide the motor
adapter (item 9 in figure 7) onto the motor making sure the pump shaft
coupling matches up with the plastic insert and seats properly. Make
sure rabbet on the motor is firmly seated into the motor adapter.
CAUTION: Pump assembly may be top heavy.
5. Rotate the pump discharge and mounting plate (if ordered) to the desired orientation. Align the holes in the mounting plate and the motor
adapter with the holes in the motor face. Secure the mounting plate
and motor adapter to the motor using (4) washers, lock washers, and
3/8” bolts (items 6,7,8) from the hardware package.
6. Ensure that lock rings are securely snapped in place and did not loosen
during shipment.
7. Install the pump into the system according to the installation instructions provided.
FOR 56C FRAME VKC8 [54”-60”(137-152
cm)] AND ALL VKC10 PUMP ADAPTERS
WITH FLYWHEELS (ITEM 35 IN FIGURE 8):
1. Unpack the pump and any supplied accessories and examine for damage. If damage is detected, save the packaging and notify the carrier
immediately.
2. Prepare to assemble the pump onto the motor by placing the motor
on the fan cover on a suitable clean, level work surface.
3. Install motor key into motor shaft key slot. Align the keyway slot on
the flywheel (item 35 in figure 8) and slide the flywheel onto the motor
shaft with the protruding boss towards the motor face. Align the keyway
slot in the coupling half and slide the coupling half on. Set coupling
half with the motor shaft recessed 7/32” and tighten both setscrews
with a 1/8” Allen wrench to 70 in-lbs.
4. Slide the flywheel forward so that it rests against the backside
of the coupling half. Tighten both setscrews.
5. Insert the coupling insert (yellow internally splined plastic sleeve) into
the coupling half on the motor shaft. Place coupling support (item
38A in figure 8) into center of coupling half with the short side facing
the motor. Carefully slide the motor adapter end (item 9 in figure 8)
of the pump assembly over the motor shaft until both coupling halves
are completely seated in the coupling insert. Make sure rabbet on the
motor is firmly seated into the motor adapter.
CAUTION: Pump assembly may be top heavy
6. Rotate the pump discharge and mounting plate (if ordered) to the
desired orientation. Align the holes in the mounting plate and the
motor adapter with the holes in the motor face. Secure the mounting
plate and motor adapter to the motor using (4) washers, lock washers
and 3/8” bolts (items 6, 7, 8) from the hardware package.
7. Ensure that lock rings are securely snapped in place and did not loosen
during shipment.
1
8. Install the pump into the system according to the installation
instructions provided.
FOR 63, 71 AND 80 METRIC FRAME
ADAPTERS WITHOUT FLYWHEELS
(USE FIGURE 7)
1. Unpack the pump and any supplied accessories and examine for damage. If
damage is detected, save the packaging and notify the carrier immediately.
2. Prepare to assemble the pump onto the motor by placing the motor
on the fan cover on a suitable clean, level work surface.
3. Install the keyway into the motor shaft key slot. Align the keyway slot
in the coupling half, and slide the coupling half onto the motor shaft
with the splined side facing the pump. Set the coupling half with the
motor shaft recessed 11.1 mm. Tighten both setscrews with a 1/8”
Allen wrench to 7.9 N-m.
4. Install the metric motor adapter (item 2 in figure 7) onto the motor.
To aid in correct installation, the letters “A” and “B” are molded onto
opposite sides of the motor adapter. For 71 frame motors, using the
Figure A
correct hardware (items 3, 4, and 5 in figure 7), mount the adapter
with side B facing up. For 63 and 80 frame motors, using the correct
hardware (items 3, 4, and 5 in figure 7), mount the adapter with side
A facing up. See figures A and B.
5. Install the coupling insert (yellow internally splined plastic sleeve) onto
the coupling half on the motor shaft. Carefully slide the motor adapter
(item 9 in figure 7) onto the motor making sure the pump shaft coupling
matches up with the plastic insert and seats properly. Make sure rabbet
on the motor is firmly seated into the motor adapter.
6. Rotate the pump discharge and the mounting plate if ordered to the
desired orientation. Align the bolt holes on the mounting plate with the
motor adapter (item 9) and the metric motor adapter flange (item 2).
Secure with the hardware provided.
CAUTION: Pump assembly may be top heavy.
7. Make sure that the locking rings are securely snapped in place and
did not loosen during shipping or the assembly process.
8. Install the pump into the system according to the installation instructions provided.
Figure B
4. Install the metric motor adapter (item 2 in figure 8) onto the motor. To
aid in correct installation, the letters “A” and “B” are molded on the
opposite sides of the metric motor adapter. For 80 frame motors using
the correct hardware (items 3,4 and 5 in figure 8) mount the adapter
with side “A” facing up. The metric motor adapter must be positioned
so that the adapter seats onto the motor rabbett. See figures A and B
above.
CAUTION: Improper positioning of the metric motor adapter can
cause premature coupling failure or cause the pump shaft to bottom
out before the pump is properly installed onto the motor adapter.
5. Install the flywheel (item 35 in figure 8) onto the flywheel adapter and
attach using four screws with lock washers (items 36 and 37 in figure
8). Tighten securely.
6. Insert the coupling insert (yellow internally splined plastic sleeve) into
the coupling half on the motor. Carefully slide the motor adapter end
(item 9 in figure 8) of the pump assembly over the motor shaft until
both coupling halves are completely seated in the coupling insert. Make
sure rabbet on the motor is firmly seated into the motor adapter.
7. Rotate the pump discharge and mounting plate if ordered to the desired
orientation. Align the boltholes on the mounting plate with the motor
adapter (item 9) and the metric motor adapter flange (item 2). Secure
with the hardware provided.
8. Make sure that the locking rings are securely snapped in place and
did not loosen during shipping or the assembly process.
CAUTION: Pump assembly may be top heavy.
Install the pump into the system according to the installation instruc-
tions provided.
FOR 80 FRAME METRIC MOTOR
ADAPTER WITH FLYWHEEL (ITEM 35
IN FIGURE 8):
1. Unpack the pump parts and any supplied accessories and examine
for damage. If damage is detected, save the packaging and notify the
carrier immediately.
2. Prepare to assemble the pump onto the motor by placing the motor on
the fan cover on a suitable clean, level work surface.
3. Install the keyway into motor shaft key slot. Align the keyway slot in
flywheel adapter / coupling half combination (item 34 and metal half of
item 27 in figure 8) and install on motor shaft with splined side facing the
pump. Note: These items are preassembled at the factory. Set coupling
half flush with the end of the motor shaft and secure with coupling support washer, lock washer and bolt (items 38B, 39 & 40). Tighten both
setscrews in coupling half with 1/8” Allen wrench to 7.9 N-m.
Figure 1
Drawing 1 shows drawing of pump mounted inside tank with suction off the bottom of the
tank and level fluctuating from near top of pump column to close to the bottom of the pump.
Drawing 2 shows drawing of pump suction near tank bottom and level fluctuating between
the top and bottom of the tank.
Drawing 3 shows drawing of pump with suction extension and the level fluctuating between
startup level and low level.
Drawing 4 shows drawing of pump mounted outside the tank.
Drawing 5 shows drawing of pump mounted outside the tank with the motor below the
liquid level.
2
Mount pump in desired configuration. Securely fasten mounting
plate if used. Motor feet may also be used for mounting.
PIPING
1. Support piping near the pump to eliminate any strain on the pump
casings. Do not use suction or discharge piping to support the pump.
2. Do not overtighten the piping on the discharge on initial installation (i.e.,
down to the collar on NPT housings or the o-ring on BSP housings).
Damage to the discharge can occur. The o-ring on the BSP housing is
only used when the plastic threads are loose.
3. Do not place the pump suction directly on the bottom of the tank. Keep
the pump suction at least one pipe diameter off the bottom.
4. A suction extension tube of up to nine feet in length can be added.
5. To minimize head loss from friction:
a. Increase pipe size by 1 diameter.
b. Use minimal number of pipe bends.
6. If a check valve is installed in the discharge piping, an air bleed must
be installed in the discharge line to prevent air lock. This allows air
trapped in the pump internals to be removed on initial start-up. See
drawings 3 and 4 in Figure 1.
7. Maintain a flooded suction. Use a foot valve if necessary.
8. Ensure that the piping does not leak and suction is not prone to clogging. Use a strainer if necessary on the suction.
9. If flexible hose is preferred, use reinforced hose rated for the proper
temperature and pressure. This helps avoid collapse or kinks.
10. Install valves a minimum of 10 pipe diameters from the pump.
CAUTION: To stop the pump if prime is lost, use one of the
following: (1) pressure switch on the discharge or (2) motor
minder to monitor motor current.
1. Completely open discharge valve. On pumps equipped with a discharge
WET END INSPECTION / REPLACEMENT
1 Disconnect the power. Unwire the motor (mark the wires for correct
rotation upon reassembly). Close the suction and discharge valves,
and remove the pump from the installation. Remove any discharge
piping that will hinder the removal of the housing.
2. Place the pump on a clean work bench and secure the motor or
mounting plate. Gently tap the locking ring (item 11) towards the motor
until it is loose (the locking ring connects the column housing adapter
(item 15) to the next section). Using a strap wrench, unthread the
column housing section turning it counterclockwise. Grasping the
discharge and pump head, pull it straight off of the pump and place it
on the bench with the suction pointing straight up.
3. Make an alignment mark on the side of the impeller housing (item 21)
and the column housing adapter (item 15) to aid in alignment during
the reassembly process. Remove the six impeller housing mounting
screws (items 22). Remove the impeller housing (item 21) and o-ring
(item 16). Grasp the impeller and remove it from the column housing
adapter (item 15).
CAUTION: Keep the drive magnet assembly (item 14) and
impeller drive (item 18) away from metal chips or particles.
Note: Keep the impeller housing o-ring (item 16) with the
impeller housing to avoid mix up during reassembly.
Figure 2
INSTALLATION
The VKC Series is a versatile pump designed to be operated in a variety of mounting configurations. The pump can be mounted either
inside or outside of a tank or sump. See Figure 1.
Note: Drawings for illustration only. Pumps need to be properly
supported when installed.
ELECTRICAL
1. Install the motor according to NEC requirements and local
electrical codes. Motor should have an overload protection
circuit.
2. Wire the motor for clockwise rotation when facing the fan
end of the motor.
3. To verify the correct motor rotation:
a. Install the pump into the system
b. Fully open the suction and discharge valves
c. Allow fluid to run into the pump. Do not allow the pump
to run dry (PTFE and ceramic bushings can’t be run dry
without causing damage to internal parts).
d. Jog the motor (allow it to run for only one to two seconds)
and observe the rotation of the motor fan. Refer to the
directional arrow by the electrical box if needed.
Note: A pump running backwards will pump but at a greatly
reduced flow and pressure.
OPERATION
EXAMINATION
1. Check the impeller drive bushing (item 17), thrust ring (item 20), ceramic thrust ring and shaft for cracks, chips, scoring or excess wear.
See figure 2. Replace as required.
2. Check for loose magnets on the drive assembly or rubbed areas on
the impeller or column housing adapter assemblies. Contact your
distributor or FTI Technical Service if a problem is found.
BUSHING REPLACEMENT
1. To remove the bushing, insert 1/16” pin punch into balance hole (inner
circle of 4 holes) of impeller assembly (items 17,18,19,20). Gently
tap the bushing out of the back of the impeller assembly. The punch
may need to be moved to a different hole if the bushing is difficult to
remove.
2. To replace the bushing, clean the impeller bore. Insert the new bushing
into the back of the impeller assembly by aligning the bushing with
the impeller bore. Press gently until the bushing bottoms out (use a
block of wood and mallet if necessary).
MOTOR REPLACEMENT
Remove the four bolts and washers (items 6, 7, and 8) securing the
motor adapter (item 9) to the motor. Carefully pull the pump away
from the motor face. Loosen the two setscrews on the coupling
half (located on the motor shaft). Remove the coupling half. Install
motor shaft coupling half onto a new motor following the assembly
instructions on page one for 56C or metric frame pumps. Make
sure the coupling insert meshes. Install pump onto the new motor.
3
DRIVE MAGNET ASSEMBLY, SHAFT BEARING
OR COLUMN SECTION REPLACEMENT
1. The drive magnet assembly (item 14) is locked in place with a left
hand threaded 5/8-18 jam nut (item 32). Loctite Thread Locker #262
is used to secure the jam nut and may require some heat to loosen
the bond for removal. Secure the pump shaft using the flats located
on the motor side of the drive magnet assembly, and remove the jam
nut. Unthread the drive magnet assembly (left hand thread) from the
shaft.
2. Loosen the two setscrews on the shaft bearing (item 28). Gently tap
the next locking ring (item 11) toward the motor until it is loose. Using
a strap wrench, unthread and remove the column extension (item 30).
Repeat step two for each section removed.
3. When you are down to the motor adapter section (item 9), remove the
four bolts holding the adapter (and mounting plate if you have one) to
the motor. Mark the flange on the motor adapter / mounting plate and
the motor face for correct orientation when reassembling. Remove
the mounting plate, and pull the motor adapter from the motor face.
4. 12” models will have two bearings in the motor adapter section. If
further disassembly is necessary, loosen the two setscrews on the
pump side bearing, and gently press the shaft and the second bearing toward the motor end until it loosens. If the bearing or the shaft
need replacement, loosen the setscrews and remove the pump shaft
coupling half. Loosen the setscrews on the bearing and slide it off the
shaft. On models 18” or longer, just loosen the setscrews on the pump
shaft coupling half and remove it.
5. Spin all of the bearings and visually inspect for binding or corrosion.
To replace, remove the four screws and washers (items 29 and 33).
Gently tap the bearings toward the pump end of each section until they
are loose.
6. Inspect the drive magnet assembly, each column section, all of the bearings, shaft, and o-rings for wear or damage. Replace as needed.
REASSEMBLY
1. If the shaft, or the first bearing on a 12” model was replaced, you will
need to slide the new bearing onto the shaft with the setscrew side
facing away from the motor. Adjust the bearing to the correct setting
in Figure 3, and tighten both setscrews.
Figure 3
Pump Motor Frame Dim. A”
VKC6/8/10 56C 0.95”
VKC6/8/10 80 2.41”
VKC6/8/10 71 2.19”
VKC6/8/10 63 2.40”
bearing into the machined recess making sure to use the outer bearing
race as the point of contact.
For models 18” or longer, insert the threaded end of the pump shaft
up through the bearing already in place in the pump end of the motor
adapter. Leave the bearing setscrews loose.
4. For metric frame pumps, install the metric motor adapter flange (item
2) per instructions in step 4 of “Pumps Without Motors (Metric Frame)
from page 1.
5. Install the coupling insert onto the pump shaft coupling half. Place
motor on its fan cover on a flat clean area. Make sure the coupling
splines mesh with the insert. Install the motor adapter and pump shaft
onto the motor face. Verify the motor adapter seats completely onto
the motor rabbet (or metric motor adapter flange on metric pumps).
Install the mounting plate (if one is used) and align the marks on the
motor, the motor adapter flange and the mounting plate for correct
orientation. Install the four bolts and tighten to the motor face.
6. For 12” models, go to step 8. For models 18” or longer, rotate the
pump shaft and press down to insure complete coupling engagement.
While holding the shaft snugly down, tighten the bearing setscrews.
7. If column o-rings (item 12) were removed or need replacement,
lubricate the o-rings with a compatible lubricant and install them in
the o-ring grooves. If the bearing (item 28) was removed, press the
new bearing (only making contact with the outer bearing race) into
the recess with the extended race (setscrews) facing away from the
motor. Install the four retaining screws and washers (items 29 and 33).
8. Lubricate the motor adapter o-rings (item 12) with a compatible lubricant. Place the locking ring (item 11) (with the smaller inside diameter
side toward the motor) over the end of the column section and slide
it toward the motor. Install the column extension (item 30) by aligning
the threaded end of the shaft through the bearing and sliding it down
to the top of the motor adapter. Secure the motor and mounting plate
to the table. Using a strap wrench, thread the column extension onto
the motor adapter. Tighten the section until there is no gap between the
sections and the flats are parallel. Tighten the two bearing setscrews
into the pump shaft. Pull the locking ring (item 11) toward the pump
end until it snaps into place locking the two sections together.
9. Repeat step eight until all column extensions are installed. If the pump
is a 24” model or longer, you may need a second strap wrench to hold
the previous section in place while tightening the new one.
Note: It may be possible to slightly overtighten these sections. Simply
back off slowly until the flats are aligned and the lock ring snaps into
place.
10. Install the left hand threaded drive magnet assembly (item 14) onto
the drive shaft (item 13) until it is set at 4.00 +/- .015 as measured
from the top of the motor adapter/column extension to the top of the
drive magnet assembly. See Figure 4. Apply a small amount of Loctite
Thread Locker #262 to the inside threads on the 5/8-18 left hand jam
nut (item 32) and the outside threads on the drive shaft. Thread the
jam nut on until it makes contact with the drive. Hold the drive magnet
assembly still and tighten it to 50 ft. pounds. Recheck the drive magnet
setting after the jam nut is tight to ensure it did not move.
2. Install the key into the keyway cut in the motor end of the pump shaft
(item 13). Align the coupling half keyway slot and install the coupling
half with the splines pointing toward the motor end. For 56C frame, set
the coupling with the shaft end recessed .218”. Tighten the setscrews.
For 63 and 71 frames, set the coupling with the shaft end recessed
.437” and tighten the setscrews. For 80 frame, set the coupling with
the shaft recessed .250 and tighten the setscrews.
3. For 12” models - from the motor side, insert the threaded end of the
shaft up through the center of the motor adapter (item 9) . Press the
Figure 4
4
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