Taco VT Series User manual

EFFECTIVE: August 9, 2019 SUPERSEDES: May 25, 2016
302-053
A: INSTALLATION
SAFETY REQUIREMENTS
It is important that you read and understand all the installation
instructions prior to beginning the installation of the unit.
A1: RECEIVING, UNCRATING, AND INSPECTING
1. Using the packing list as a guide, make certain that all equip-
ment arrived in the shipment and inspect for obvious damage
incurred during shipment.
2. Immediately report any damage to carrier.
3. Uncrate and lay out all the equipment in the order of installa-
tion on clean boards or floor.
A2: INSTALLATION EQUIPMENT AND TOOLS
The following is a checklist of tools and equipment needed
for the installation. Assemble prior to starting the installation.
( ) 1. A portable or permanent derrick of sufficient strength to
safely lift the total weight of the pump. A conservative
weight for the pump will be listed on the freight bill. The
minimum travel of the derrick should be at least 6’ greater
than the longest piece of pump equipment. Hoist must
have swivel hook.
( ) 2. One or two cable slings of sufficient strength to lift the
entire pump and long enough to clear greatest shaft pro-
jection.
( ) 3. One erector sling for lifting the driver.
( ) 4. Dial indicator calibrated in .001” divisions with a stand.
( ) 5. Wire brush, paint brush, three-cornered file, flat file, and
emery cloth.
( ) 6. Set of mechanic’s tools including an assortment of socket
wrenches.
( ) 7. Bucket of solvent, coal oil or naphtha, etc.
( ) 8. Machinist’s level
( ) 9. Steel tape measure.
( ) 10. Two pipe wrenches of sufficient size to handle shaft and
couplings. (Always required for hollow shaft drive).
( ) 11. One set of steel clamps to fit the pump bowl.
( ) 12. Two sets of steel clamps to fit the column pipe. NOTE:
One set is required if only one section of column is fur-
nished with the pump assembly.
( ) 13. Two 4 x 4 timbers or “H” beams (if the unit is extra large
and heavy). Long enough to span the installation opening.
( ) 14. Two “V” blocks for checking shaft straightness.
( ) 15. Two chain tongs of sufficient size to handle column pipe.
( ) 16. Thread compound and gasket compound with thinner.
( ) 17. Sufficient quantity of wedges to level discharge head or
foundation plate (if applicable).
( ) 18. Sufficient quantity of top quality non-shrink grout.
( ) 19. Teflon Paste compound for stainless threads, anti-seize
compound for the other threads.
( ) 20. Bundle of cleaning rags.
( ) 21. Putty knife.
A3: SPECIAL PRECAUTIONS
1. Make certain that no rags, wood scraps, etc., are lodged in any
exposed openings. Check pit depth and anchor bolt spacing
with pump dimensions. Lift and handle unit carefully to prevent
bending strain damage caused by the hanging weight of the
unit. Do not lift any item by the shaft. Take extra precautions
when handling a mechanical seal or packing gland assembly
since this is a delicate and precision component.
2. ALWAYS USE THREAD COMPOUND ON SHAFT AND
COLUMN JOINTS. Do not allow pipe compound, solvent, or
any petroleum products to get on the rubber bearings.
3. Shaft threads are usually left hand; column threads are right
hand. If unit is shipped assembled, and has threaded
column pipe; pipe joints may have loosened during ship-
ment. Before installation check threaded connections for
tightness. A chain tong pipe wrench should be used to
verify tightness of pipe connections.
A4: PREPARATION AND CLEANING
1. Clean all threads and flange faces with a wire brush or paint
brush and solvent. If required, clean threads with a three-cor-
nered file. The protective coating on the threads and flanges
is a rust preventive coating and not a thread compound or
gasket material.
2. Clean all shafts and couplings with a rag soaked in solvent.
Make certain that all bearings are clean.
3. If applicable, remove protective caps from ends of oil tubing
and clean all tubing threads and shaft bearings thoroughly
with solvent. Make certain tubing faces are free of nicks,
dents, and burrs.
4. Remove gland assembly from discharge head. Remember to
be very careful with this item.
5. Make a physical check of the discharge head or foundation
plate for proper fit to foundation.
6. Check pipe ends and couplings to be sure there are no dents,
nicks, or burrs.
7. Check shaft end for nicks, burrs, etc. The shaft alignment is
dependent on the point of the shaft ends.
8. Check all boxed shafting for straightness using “V” blocks
and dial indicator as follows:
8.a Start with “V” blocks as close to the threads as pos-
sible. Check two or more places between “V” blocks
and straighten shaft to within .003” to .005” of the Total
Indicated Run-Out. Straightening may be performed by
mechanical or high pressure on the high point.
8.b Move one “V” block about 20% of shaft length inward
from the end. Check between the “V” blocks and the
overhanging ends; straighten as in step 1 above.
8.c If straightening was required in Step 2 repeat Step 1.
Repeat the above steps until shaft checks within tolerance
in both positions. Wipe the shaft clean after checking.
VT Series
Vertical Turbine Pumps
Installation and Operation Instructions

2
9. Check run-out on bowl shaft extensions by placing dial indi-
cator toward the end of the shaft and turning slowly making
certain the shaft stays to one side of the upper most bowl
bearing. Total Indicating Run-Out should not exceed .005”.
10. Check and record the total bowl lateral or end play. If a
solid shaft motor is used, this information will be required for
flanged coupling assembly.
A5: INSTALLATION INSTRUCTIONS
A5.1: BASE PLATE OR FOUNDATION PLATE
(IF SUPPLIED)
1. Place foundation plate over anchor bolts and allow to rest on
foundation. Check to make sure foundation plate is level, use
wedges or shim stock if necessary. Full contact with founda-
tion is important for vibration free operation.
2. If the final elevation of the plate is critical, this should be
checked at this time.
3. Attach hex nuts to anchor bolts and turn until snug against
foundation plate.
4. The foundation plate serves as a good surface for the dis-
charge head. See Figure A5.1.
A5.2: PUMP BOWL
1. Place the two beams on the foundation plate or foundation
opening.
2. Secure the proper clamp to the upper end of the bowl beneath
a convenient shoulder. If only one sling is used, attach the
sling to the clamps far enough out on the ears to allow for easy
removal after setting the unit down on the beams.
3. Hoist the bowl to a vertical position using the derrick. If the
bowl is equipped with a strainer, do not drag the strainer
across the floor.
4. If there is any auxiliary piping to the bowl bearing or the
thermo-wells, make certain the bowl portion of the piping is
attached to the bowl at this time.
5. Center the bowl over installation opening then carefully lower
until the clamp ears are resting squarely on the beams. Then
remove the sling.
6. Clean the following items: shaft threads, discharge threads,
flange face (if applicable), threads and face of oil tubing (if
applicable). Lightly oil the shaft threads and screw the cou-
pling on half way. Place a rag over the coupling to prevent
entrance of foreign matter during the next step in assembly.
A5.3: COLUMN OPEN LINESHAFT
Refer to the installation plan or the overall dimension sheet
of the submittal to determine correct sequence for installation of
column lengths.
1. Secure pipe clamp immediately beneath column coupling.
If column is flanged, insert bolts and secure clamp below
bottom of flange. Clamp should keep bolts in position. See
Figure A5.3.1.
2. Slide the lineshaft into bottom of column pipe and allow it to
extend approximately 15” below the bottom end of the pipe.
Make certain the sleeve area of the lineshaft (if applicable)
is toward the top of the pipe. Tie a series of half hitches to
the column pipe and lineshaft with 3⁄4” rope. (Tie the rope to
a chain pipe vise on the lineshaft, if needed.) Attach the sling
to the clamp ears as described under Section A5.2, Step 2.
3. Hoist column and lineshaft to a vertical position with the der-
rick. Do not drag shaft across the floor. Before centering col-
umn over bowl, tap the side of column to remove any loose
matter.
4. Position the column and lineshaft over the bowl. Align the
lineshaft and remove the rag from the bowlshaft coupling.
Lightly oil the threads. Lower until the lineshaft contacts cou-
pling. Remove the rope. Hold coupling and turn the lineshaft
(left hand threads) until the shaft ends butt up. Place one
pipe wrench on the coupling and one on the lineshaft. Tighten
securely. Remove the wrench marks form the shaft and cou-
pling with a flat file and emery cloth.
5.a If bowl to column connection is threaded, apply thread
compound to the pipe threads. Attach chain tongs to bowl
and to column for support. Lower the column pipe, and at
the same time, turn the pipe until it seats against the mating
shoulder on the bowl. Tighten pipe into bowl securely.
5.b If bowl to column connection is flanged, spread a thin,
even film of gasket compound on the bowl discharge flange.
Lower pipe and align studs in the bowl with the holes in the
flange. Seat the column flange against bowl flange. Install
and tighten hex nuts evenly.
6. Hoist assembly enough to remove the clamp on the bowl
assembly.
7. If there is any auxiliary piping to bowl bearing or thermo-well
being used, that portion that attaches to the column section
should now be installed. Also, if the bowl and column are
coated with any special coating, any required patch work
should be done before lowering unit.
8. Slide beams in close to column. Lower the assembly and rest
the clamp ears on the beams. Remove the sling.
Figure A5.1
Figure A5.3.1

3
9.a If there is more than one section of threaded column, a center-
ing spider may be used. Slip the spider over the lineshaft with
lock ring on top. Screw the centering spider into the column
coupling until it butts against the column pipe. See Figure
A5.3.9 (THREADED).
Note: Some spiders may not have lock rings.
9.b If column is flanged, clean flange and the O.D. of the spider.
Slip the spider over the lineshaft with lock ring on top and
seat into spider recess. See Figure A5.3.9 (FLANGED).
10. Clean all lineshaft threads and faces thoroughly. Screw the
coupling on half of its length. Cover the coupling with a rag to
prevent foreign matter from dropping into the entrance.
11. If there is more than one section of column, repeat Section
A5.3, steps 1 through 10, for each additional section until all
of the column is assembled. Clean the thread/flange face of
the column pipe and the lineshaft projection thoroughly. Do
not attach the shaft coupling to the top piece of shaft.
A5.4: PUMP HEAD
1. Wipe a thin layer of joint compound on the top column
threads, or, if connection is flanged, on the top flange face.
Remove the packing gland assembly from the discharge
head or motor stand. Clean all machined faces of the dis-
charge head/motor stand thoroughly. Attach a sling to the
discharge head/motor stand, hoist and center over the col-
umn. Lower the discharge head/motor stand being careful
not to damage the top section of shafting, known as the
head shaft, or the stretch tube (if applicable).
2.a Set the discharge head on the top section of threaded col-
umn pipe. Screw the discharge head onto the column pipe.
2.b Align the holes of the discharge head/motor stand with the
holes of the column pipe flange, then lower until head is
resting squarely on flange. Install bolts and tighten.
3. If there is an underground outlet, place the head as close as
possible to the final position in relation to the outlet.
4.a If an adjustable top flange or threaded head is used, the
head can be readily turned to place it in alignment to the
underground outlet. In addition, the head should be turned
as needed to attain the proper shaft projection and the
correct distance from the outlet center line to the bottom of
the head. Back the packing ring off to allow ample working
room, fill the chamfer on the lower end of the flange with
lampwick packing that has been precoated with joint com-
pound. Use a generous amount of the packing and wind
the packing around in such a manner that it is screwed into
place. Screw the packing ring against the flange or bottom
of the head and tighten.
4.b If the adjustable flange is being used in conjunction with oil
tubing, the top of the tubing should be approximately 11/4
inches below the tension box mounting face of the head
after the flange is adjusted.
5. Hoist head slightly. Remove the clamp from the top piece
of column. Remove setting beams and clean surface of the
foundation itself. If there is an auxiliary line to the bowl bearing
or thermo-well, that portion immediately below and attaching
to the head should now be installed. Properly place discharge
outlet and align mounting holes with anchor bolts and lower
until head is resting squarely on the foundation.
6.a If head is resting on foundation plate, align mounting holes
of the head with tapped holes in the foundation plate. Install
and tighten cap screws.
6.b Mix a sufficient quantity of rather dry non-shrink grout. Force
as much grout under the foundation plate as possible. If
grout holes are provided, grout can be pressure-fed through
the grout holes until all cavities are filled.
6.c As the head is resting on the foundation, drive wedges
under head until proper elevation is within .005 inches of the
Total Indicated Run-out with respect to head shaft. Install
and tighten hex nuts to anchor bolts. Grout under the outer
perimeter of the head and cover the wedges with the grout.
6.d If a motor stand is used, as in an underground discharge
application, it should first be determined that the outlet in
the column aligns with the discharge piping so that no strain
will be placed on the pump. Do not make this correction
at this time, however. After checking the pipe alignment
follow Step 4a for leveling and grouting.
6.e Step 6d should be followed if there is a suction connection
to the header. It is recommended that a flexible joint of some
description be used between the suction flange and header
to compensate for any slight misalignment. If no flexible joint
is used, the header flange must be perfectly aligned so that
no misalignment is transferred to the pump.
A5.5: PACKING GLAND OR MECHANICAL SEAL
1. Packing Gland Open Line Shaft
1.a Remove the packing gland, packing rings and lantern ring
from the gland assembly. Clean the packing box thoroughly
and apply a neoprene o-ring to the receiving hole in the dis-
charge head.
1.b Slide the packing box over the head shaft. Properly adjust
mounting holes so that the grease ports of the packing gland
are directed toward the access windows of the discharge
head or motor stand. Seat the packing gland against the
discharge head/motor stand then install and tighten cap
screws. It should not be necessary to exert any side pres-
sure on the shaft in order to seat the packing box properly.
1.c Reseat packing. See Section G4 for details.
1.d Slip rubber slinger over head shaft and position just above
the packing gland.
2. Mechanical Seal Open Line Shaft
Figure A5.3.9
Figure A5.5

4
2.a Inspect the seal assembly to be sure O-rings are included
on the seal housing cover and the shaft sleeve. On the lock
ring, be sure the lower set screws are tight and upper set
screws are loose. See Figure A5.5.
2.b Prior to installing the shaft sleeve o-ring, lubricate with light
grease then slide complete assembly over head shaft. Seat
and bolt down the assembly against the seal housing, taking
care to be sure that the O-ring of the seal housing cover is in
its groove.
2.c To set seal, first set impeller lateral, then tighten top set of set
screws of the lock ring. Remove paper spacers and keep for
future use.
A5.6: VERTICAL MOTORS
1. Hollow Shaft Motor
1.a Clean threads and face of head shaft projecting above pack-
ing gland thoroughly, then oil threads lightly. Thread coupling
on shaft for half of its length. Stuff a rag into open end of the
shaft coupling.
1.b Remove the top cover from the motor. Unbolt the coupling
(clutch or drive block) from the motor and remove the coupling.
1.c Run a fine flat file over the motor mounting surface of the
head to remove any nicks or burrs. Thoroughly clean face
and register with solvent. Wipe a thin layer of light oil over
the surface. This will help prevent rust and will also facilitate
slight driver shifting during coupling alignment.
1.d Attach the erector sling to the motor lifting lugs. Hoist motor
sufficiently to allow easy access to mounting flange. Remove
nicks and burrs on the mounting flange with a fine flat file and
thoroughly clean with solvent.
1.e If there is sufficient head room to install the head shaft after
placing the motor on the discharge head, prepare the shaft
as described in Step 1.g below, then lower the head shaft
through the motor with the keyway end up. Install the adjust-
ing nut and thread it on 4 or 5 threads, then allow the shaft to
suspend inside the motor.
1.f Hoist motor sufficiently to clear the stand and swing it over
until motor is resting on mounting ring. Properly place conduit
box, align mounting holes and install, but do not tighten cap
screws.
1.g Clean the head shaft thoroughly and dress the threads and
keyway with a 3-cornered file, if necessary. Lift the head shaft
and carefully lower it through the quill or hollow shaft (end
with keyway goes toward the top) and allow shaft to contact
head coupling. Remove the rag in the coupling. Screw the
head shaft into the motor coupling on the head shaft and
tighten.
1.h Make temporary electrical connection to motor, bump starter
to determine correct rotation (counter clockwise as viewed
from above). Install and tighten cap screws to the motor and
discharge head/motor stand. If power is not available, DO
NOT make final drive shaft connections (Steps 1.i and 1.j)
until power is available and correct rotation is determined.
1.i Slide clutch over head shaft, seat against drive plate, install
and tighten bolts.
1.j IMPELLER ADJUSTMENTS: Turn clutch until keyways in
shaft and clutch align; install and seat gib key. Thread head
adjusting nut onto head shaft until it seats against top of the
clutch. Hold the clutch to keep from turning and turn head nut
until the impellers clear the bottom allowing the rotor to turn
freely. Continue to tighten head nut until impellers are elevated
a sufficient distance (about 11⁄2turns) to accommodate pump
hydraulic thrust and associated shaft stretch. Align holes
in head nut with taps in clutch, install and tighten machine
screws. Place top cover on driver and secure.
2. Solid Shaft Motor
2.a Slide the pump hub of the adjustable motor coupling onto the
head shaft and insert the key. Screw the adjuster nut onto the
head shaft.
2.b Attach the erector sling to the motor lifting lugs. Hoist motor
sufficiently to allow easy access to mounting flange. Remove
nicks and burrs on the mounting flange with a fine flat file and
thoroughly clean with solvent.
2.c While the motor is suspended from the erector sling, slide the
motor hub of the adjustable motor coupling onto the motor
shaft. Insert the key into the keyway of the motor hub far
enough up the motor shaft to expose the keeper key seat on
the shaft. Seat the keeper key onto the motor shaft. Pull the
motor hub down over the keeper key.
2.d Bolt the spacer to the motor hub, if applicable.
2.e Hoist motor sufficiently to clear the stand and lower it until the
motor is resting on the discharge head. Properly place the
conduit box, align mounting holes and install cap screws.
2.f IMPELLER ADJUSTMENT: Adjust the adjuster nut until the
clearance between the spacer/adjuster nut and the motor
hub is equal to the impeller adjustment as stated in Section
A5.6, 1.j. Add additional clearance to the above adjustments
to accommodate pump hydraulic thrust and the associated
shaft stretch.
2.g Make temporary electrical connections to motor, bump starter
to determine correct rotation (counter clockwise when viewed
from above). If power is not available, DO NOT make final
drive shaft connections (Step 2.h) until power is avail-
able and correct rotation is determined.
2.h Align holes and taps of the motor hub, pump hub, adjuster
nut, and spacer (if applicable). Install and tighten cap screws.
A5.7: MISCELLANEOUS ASSEMBLIES
1. Discharge Piping
1.a Above and below floor piping should be installed in such a
manner as to eliminate the possibility of the discharge head
being strained. Gate valves, check valves, and other piping
items must not depend upon the pump head for support.
1.b If a flexible joint, such as a dresser coupling, is to be used,
the tie bolts and lugs used to span the flexible joint should
be of sufficient strength to resist the force created by the
discharge pressure at the pump head. None of this force
should be imposed on the head or the foundation bolts. The
tension should be taken carefully on these tie bolts so that
any amount of forward movement induced to the head will
be counteracted during operation so that alignment is main-
tained throughout the operation.
2. Air Release Valve
Install the air release valve on the pump head or just beyond
on the discharge piping. It is suggested that if a throttling valve is
not furnished, a throttling device be used to restrict the discharge
of air to insure that a cushion of air is available in the discharge
head. Placement of the throttling device should be such that the
air release valve is between the discharge head and throttling
valve. Note: Exhausting the air from a head too quickly often
causes breakage.
3. Gauges and Miscellaneous Pipe Connections
PRESSURE “L” PORT “U” PORT
0-100 PSI Grease Grease
100-300 PSI Grease Grease
300-450 PSI Bypass Grease

5
3.a Connect the pressure gauge to the tap in the discharge and,
if required, in the suction flange. Position dial face to facilitate
reading.
3.b Make drain pipe connections. Route piping so that it will not
interfere with normal maintenance procedures.
3.c If packing gland bypass line is to be installed use the following
chart to determine correct configuration.
4. Electrical Connections
4.a All connections to the motor such as main leads, space heat-
er leads, winding protection leads, etc., should be made in
accordance with prevailing specifications.
4.b Motor wiring can be identified by the following designations:
H – Space Heaters
P – Thermostats
T – Main leads (connect per nameplate and voltage
required) on motor.
B: STORAGE
B1: CONSIDERATIONS
When a pump is made for use in a sump or a can, it is usually
a short coupled or close coupled pump assembly. Short coupled
pump assemblies are usually shipped assembled but with the
driver separate. Storage for such a pump is an easy matter. See
Section B3 below.
Pumps used for deep sump or well applications on the other
hand, tend to be deep setting pumps. These are shipped unas-
sembled. The unassembled pieces are generally the driver, the
discharge or motor stand, column pipe, tube and shaft assem-
blies, and the bowl assembly. The following is a general list of
storage suggestions.
B2: GENERAL HINTS
As stated in Section A1 INSTALLATION of this manual, it is a
very good idea to make sure all of the necessary items ordered
are received without damage.
1 After uncrating/unpackaging and checking that all items were
received in good order, recrate and package all items in the
same manner that they were received. Clearly label each
package as to the contents and use in the assembly.
2. If more than one size and/or model of pump is ordered, take
special care not to confuse like items, such as valves, gauge,
bolts and hardware, or spare parts, for the two or more pumps.
3. Group parts according to their stage of assembly. Example:
bowls first, column and shafting second, discharge third, and
so on. This will save searching for the proper parts and hard-
ware at any given point during assembly.
B3: SHORT COUPLED PUMPS
1. Cover suction and discharge ports to prevent entrance of any
foreign materials.
2. Cover all other miscellaneous holes, i.e. pressure relief, pre-
lube and pressure gauge holes, etc.
3. Avoid exposure to weather and elements: either store indoors
or cover with a tarp.
4. Use a support framework so that no side pressure is exerted
on the pump when placed in storage.
C: ELECTRICAL
D: OPERATION
D1: PRIOR TO START-UP
1. Perform initial servicing on the driver as recommended by
the driver manufacturer. Also perform initial servicing on all
auxiliary assemblies if required.
2. Recheck all fasteners and fittings for tightness.
3. If the air release is manual or if air vent is automatic but
equipped with a valve, make certain the valve is opened
partially but not all of the way.
4. If there is a control valve on the discharge side of the pump,
make certain it is partially open so that the pump will not be
damaged if normal back pressure is not available until the
line is filled.
9. Bump starter to insure that the unit has correct rotation.
D2: INITIAL START-UP
1. Energize starter. After pump has come up to the rated speed
and all air has been exhausted, regulate control valve to
achieve desired pressure.
2. If the air release is manual, close it off after air is exhausted.
If air release is automatic, determine if the air was exhausted
too quickly (which causes the pump to jerk violently when the
valve is closed) or too slowly and regulate manual valve or
throttling device to correct this.
3. Check all joints for leakage and correct if evident.
4. Make certain the driver is operating satisfactorily as to tem-
perature, bearing temperature, etc., as prescribed by the driver
manufacturer.
5. Check for excessive vibration. If this is evident, shut down
unit immediately and begin checking for the cause.
6. If pump is equipped with packing, adjust the packing gland
(see Sections G4.h and G4.i) to allow some leakage past the
packing.
D3: ROUTINE/NORMAL
1. Start the pump in accordance with the starting equipment
used.
2. Driver lubricants should be checked following the instructions
in the Motor O & M manual attached.
3. The packing gland should be checked for proper leakage.
D4: SHUTDOWN/EMERGENCY
1. Shutdown in accordance with the starting equipment used.
Refer to Section H (Trouble Shooting) for further instructions.
E: FIELD TESTS
When a field test of the pump’s performance is required,
make the following readings: Volume, Total Head and Horsepower
Measurements, Rotating Speed and Liquid Temperature. Compare
the results of the field test with performance curve for your pump.
All volume, total head and efficiency guarantees are based
on a shop test when handling clear, cold, fresh water at a tem-
perature not exceeding 85° F and under certain specified suction
conditions.
(1) Volume (Capacity) Measurement – Measure the rate of flow
from the pump discharge in gallons per minute. The volume
measurement may be made using any one of the following
pieces of equipment: A calibrated Venturi meter, a thin-plate
calibrated orifice, a calibrated pilot tube, or an accurately
measured reservoir.
WARNING: If unit is equipped with VFD (Variable
Frequency Drive), consult the factory for minimum and
critical pump speeds before start-up.

6
(2) Total Head Measurement – The total pumping head consists
of: distance from the water level in the sump (when pumping)
to the center of the discharge pressure gauge, plus the dis-
charge gauge reading, the friction loss through the column
and head, and the velocity head at the discharge.
NOTE: Convert pressure gauge reading to feet of liquid
by multiplying the reading times 2.31 times the specific
gravity of liquid.
(3) Horsepower Measurement – Measure horsepower con-
sumption of the pump by a direct reading of a wattmeter and
applying the reading to the following formula:
Horsepower Formula:
BHP = (KW Input x Eff) 0.746
Pump Efficiency Formula:
Pump Efficiency = (TDH x GPM x SG) / (3960 x BHP)
Where:
BHP = Brake Horsepower Delivered
KW Input = Real Input Power (KW)
Eff = Motor Efficiency
SG = Specific Gravity of Liquid
TDH = Total Dynamic Head
GPM = Gallons per Minute
F: ENGINEERING
Customer:
TACO Model:
Lateral:
K Factor:
Impeller Type:
Impeller Adjutment:
Minimum Submergence:
G: MAINTENANCE
G1: GENERAL
1. For normal operation and maintenance of driver, follow the
instructions of the driver manufacturer.
2. If the pump is oil lubricated, check the oil level in the lubrica-
tor and refill on a regular schedule.
3. If the unit requires pre-lubrication, make certain this process
is started with ample time prior to pump start-up to insure that
all bearings are properly wetted.
4. Apply grease to the packing box assembly at the rate of 1⁄4
to 1⁄2oz. for each 24 hours of operation. See Section G5
(PREVENTATIVE MAINTENANCE).
5. Bowl bearings are self lubricated by the liquid pumped. Lower
suction bowl bearing is packed at the factory with no mainte-
nance required in the field.
6. The packing box should seldom require adjustment but in the
event that the leakage becomes excessive, see Section F4 for
details. Remember that overtightening wears out the packing
rings prematurely and causes scoring and damage to the top
shaft. Always adjust the gland with the unit running.
G2: BEARING REPLACEMENT
1. Alloy bearings, such as bronze, can be readily pressed in
with an arbor or screw press. If this is not available, they can
be driven in very carefully with a block of wood and a ham-
mer. Make certain that bearing projections are maintained.
2. Graphite and composition bearings do not possess great
tensile or compressive strength and cannot be driven in as
alloy bearings can. They must be pressed in with a slow,
continuous and even motion attained with an arbor or screw
press with a mandrel to fit the bearing properly. The hub bore
and the bearing should be lubricated with water to aid the
pressing operation. DO NOT LUBRICATE WITH OIL OR
GREASE.
G3: WEAR RING (optional) REPLACEMENT
1. Wear rings can be removed by cutting the cross section with
a chisel and prying one end inward until it is loose in the bore.
To install, make a mandrel to fit the wear rings and press in
with an arbor or screw press. In an emergency, the wear
rings can be installed by gently and evenly tapping around
the top edge with a wood block and a hammer or a rubber
mallet.
2. If impeller skirts are equipped with wear rings, cut the wear
ring cross section with a chisel and force off. Heat on the ring
will assist in the removal and installation. To install, make
a mandrel to fit the O.D. of the wear rings and press flush
with the bottom of the impeller skirts. If necessary, gently
and evenly tap around the top edge with a wood block and a
hammer or with a rubber mallet.
G4: PACKING REPLACEMENT
1. When the packing has been compressed to the point that the
gland is about to contact the upper face of the packing box,
remove the gland, add one extra packing ring and re-adjust.
If this fails to reduce the leakage, remove all of the packing
rings and repack with new rings.
2. These are the step-by-step procedures in repacking a packing
box in the pump:
a. Clean out the old packing. This includes the packing below
the lantern ring. Often the old packing below the lantern
ring is not replaced when repacking the gland as it should
be. Flexible packing hooks are available for removing the
packing.
b. Check the shaft for nicks and score marks; remove any
that are present; then clean carefully. Clean up the bore of
the box. Check the lantern ring to make sure the channels
and holes are not plugged up.
c. If the replacement packing is in the form of a continuous
coil or rope, it must be cut into rings before installing. After
cutting on the mark, the first length of packing may be
used as a template for cutting all the other rings. Begin by
installing the first ring. It is recommended that grease or oil
be smeared on at least the outer diameter of the ring.
d. With the aid of a split bushing, push the packing to the
bottom of the box. The O.D. of this split bushing should
be approximately .005 inch smaller than the bore of the
packing box to prevent the formation of a lip on the packing
that is being seated. Seat this bottom ring hard because it
must seal on the face of the packing box bearing as well as
against the shaft and the bore. See Figure G4.d.
e. Repeat this operation with each ring making sure to stag-
ger the gaps formed by the ends of the ring at 90 degree
intervals. See Figure G4.e.
f. If a lantern ring is used, be sure it is properly positioned
so it is centered with the drilling in the packing box. See
Figure G4.f.
g. Position the packing gland. Tighten it down evenly. The
packing gland must not be cocked within the packing box.
An unsquare packing gland causes uneven compression
of the packing rings and, more importantly, damage to the
shaft. Good practice is to allow at least 1⁄4inch from the top

7
of the top packing ring to the top face of the packing box.
This helps center the gland and minimizes cocking. See
Figure G4.g.
h. Permit sufficient leakage to keep the packing box running
cool. Adequate leakage at this time is a necessity. Check
the temperature of the leakage as well as the pump hous-
ing. If the pump runs hot and the leakage begins to choke
off, stop the pump and let it cool down. Steps d through h
must be repeated when the packing is adjusted.
i. Allow the pump to run 15 minutes and if leakage rate is
more than desirable, tighten the gland nuts 1⁄8of a turn.
This packing adjustment is made with the pump running.
Before making another adjustment, allow the packing to
equalize against the increased pressure and the leakage
to gradually decrease to a steady rate. PUMP PACKING
MUST ALWAYS LEAK SLIGHTLY.
Note:
1. Chances are the packing will run a little warmer for the first
few days until the packing rings have burnished in. Often the
leakage rate will reduce by itself at this time.
2. Remember that the packing leakage may be warmer than the
fluid being pumped It doesn’t mean that the packing is being
damaged.
Figure G4.d
Figure G4.e
Figure G4.f
Figure G4.g

8
G5: PREVENTIVE MAINTENANCE
Proper preventive maintenance consists of maintaining
records of operation hours, operating data, gauge readings, and
service performed on the pump. Using this information in con-
junction with the suggested preventive maintenance schedule
below will reduce downtime and prevent costly breakdowns.
FREQUENCY OF
INSPECTION COMPONENT INSPECTION AND MAINTENANCE
Weekly Driver Motor Clean oil, dust, water and chemicals from the exterior of motor. Make sure motor air intake and outlets
(fan cooled motor) are unobstructed.
Monthly
Driver Motor Check motor bearing temperature with temperature indicator (not your hand). If bearings are running
hot, consult motor manufacturer’s instructions.
Packing Gland Grease with modest amount of packing lubricant.
Every 3 Months
(2000 operating hours)
Packing Gland Inspect packing and replace if necessary.
Top Shaft Check the shaft. Scoring accelerates wear on packing. Repair or replace top shaft if scoring is evident.
Semi-annually
(4000 operating hours)
Pump Check operating vibration of the pump and compare to vibration check taken during initial inspection. If
vibration has changed, shut down pump and inspect bowl assembly for damage or clogging.
Pump
Foundation
Check foundation for settling. It may cause misalignment of pump and strain on discharge and suction
piping. Correct for any change in foundation.
Pump
Performance
Check discharge and suction pressure readings against initial field test and correct by adjusting impel-
lers if performance has dropped in excess of 10%.
Annually
Packing Gland Remove by-pass piping from packing gland and check for scaling and deposits that restrict flow.
Replace piping.
Pump Efficiency
Measure total dynamic head and flow. Take power readings. Compare with initial record of pump effi-
ciency. If efficiency has decreased more than 5%, re-adjust impellers. If performance does not improve,
replace impeller or wear ring as required.
Suction Bowl
Bearing
Repack suction bell bearing if pump is short coupled or booster can type and supplied with grease line
to suction bearing.
Caution: Use non-soluble grease. DO NOT overgrease, which can push shafting up and alter impeller
setting.
PREVENTIVE MAINTENANCE INTERNAL INSPECTION CHART

9
H: TROUBLE SHOOTING
H1: TROUBLE SHOOTING
INSUFFICIENT PRESSURE
1. Speed too slow (check voltage)
2. Impeller trimmed incorrectly
3. Impeller loose
4. Impeller plugged
5. Wear rings worn
6. Entrained air in pump
7. Leaking joints or bowl casings
8. Wrong rotation
9. Incorrect impeller adjustment
NO LIQUID DELIVERED
1. Pump suction broken (water level below inlet)
2. Suction valve closed
3. Impeller plugged
4. Strainer clogged
5. Wrong rotation
6. Shaft broken or unscrewed
7. Impeller loose
8. Barrel or discharge not vented
9. Driver inoperative
VIBRATION
1. Motor imbalance (electrical)
2. Motor bearing is not properly seated or is worn
3. Motor drive coupling out of balance or alignment
4. Misalignment of pump, casing, discharge head,
column, and/or bowls
5. Discharge head misaligned by improper mounting
or pipe strain
6. Bent shafting
7. Worn pump bearings
8. Clogged impeller or foreign material in pump
9. Improper impeller adjustment
10. Vortex problems in sump
11. Resonance (system frequency at or near pump speed)
12. Cavitation
13. Impeller out of balance
INSUFFICIENT CAPACITY
1. Speed too slow
2. Impeller trimmed incorrectly
3. Impeller loose
4. Impeller or bowl partially plugged
5. Leaking joints
6. Strainer or suction pipe clogged
7. Suction valve throttled
8. Low water level
9. Wrong rotation
10. Insufficient submergence
11. Insufficient N.P.S.H.
12. Incorrect impeller adjustment
13. Worn pump
14. Pressure higher than design
USING TOO MUCH POWER
1. Speed too high
2. Improper impeller adjustment
3. Improper impeller trim
4. Pump out of alignment
5. Coupling out of alignment
6. Pumping foreign material
7. Lubrication oil too heavy
8. Bent shaft
9. Tight bearing or packing
10. Specific gravity or viscosity of fluid higher than design
11. Worn pump
12. Damaged pump
13. Partial freezing of pump liquid
ABNORMAL NOISE
1. Motor noise
2. Pump bearing running dry
3. Broken column bearing retainers
4. Broken shaft or oil tubing
5. Impeller dragging on bowl case
6. Cavitation, due to insufficient N.P.S.H.A. and/or
submergence
7. Foreign material in pump
8. Excessive fluid velocity in pipe system
H2: IMPELLERS
TROUBLE SOURCE PROBABLE CAUSE REMEDY
Wear on exit vanes and
shrouds Abrasive action Replace impeller if excessive. Consider coating or upgrading material.
Pitting on entrance vanes of
impellers Cavitation Correct condition or upgrade material to extend life.
Pitting on impellers and
bowl castings Corrosion/Erosion Investigate cost of different materials vs. frequency of replacements.
Wear on impeller skirts and/
or bowl seal ring area
1. Abrasive action or excess wear impeller skirts to
function as bearing journal
2. Impeller set too high
1. Install new bearings and wear rings. Upgrade material
if abrasive action.
2. Re-ring and adjust impellers correctly.
Impeller loose on shaft
(extremely rare occurrence)
1. Repeated shock load by surge in suction or discharge
line (can loosen first or last stage impellers)
2. Foreign material jamming impeller (may break shaft or
trim over loads before impeller becomes too loose)
3. Differential expansion due to temperature
4. Parts improperly machined and/or assembled
5. Torsion loading on submersible pumps
1. Re-fit impellers. If collet mounted, consider changing to
key mounting.
2. Remove cause of jamming.
3. If collet mounted, consider change to key mounted.
Avoid sudden thermal shock.
4. Correct parts if necessary and refit.
5. Add keyway to collet mounting.

10
H3: BEARINGS
TROUBLE SOURCE PROBABLE CAUSE REMEDY
Bearing seized or galling
on shaft Running dry without lubrication Check lubrication, look for plugged suction or evidence of flashing.
Bearing failure or bearing
seized High temperature failure Check pump manufacturer for bearing temperature limits
Excessive shaft wear under
rubber
Rubber bearings will swell in hydrocarbon, H.S., and high
temperature Change bearing material
Premature bearing wear Abrasive action Consider conversion to water flushing on all bearings,
pressure grease or oil lubrication.
Uneven wear on bearings,
uniform wear on shaft Pump’s non-rotating parts misaligned
Check mounting and discharge pipe connection, dirt
between column joints.
Correct misalignment, replace bearings and repair or
replace shaft.
Uniform wear on bearings
and shaft Abrasive action Replace parts. Consider changing materials or means of lubrication.
Uniform wear on bearings,
uneven wear on shaft
1. Shaft run-out caused by bent shafts, shafts not butted
on couplings, dirt or grease between the shafts
2. Shaft ends not properly faced
1. Straighten shaft or replace, clean and assemble cor-
rectly.
2. Face parallel and concentric.
H4: SHAFT AND COUPLING
TROUBLE SOURCE PROBABLE CAUSE REMEDY
Bent shaft Mishandling in transit or assembly Check straightness. Correct to .005”/ft total run-out or
replace.
Shaft coupling elongated
(neck down)
1. Motor is started while pump running in reverse
2. Corrosion
3. Pipe wrench fatigue on reused couplings
4. Power being applied to shafts that are not butted in
coupling
Look for faulty check valve. Could also be momentary
power failure or improper starting timers.
Shaft coupling unscrewed Pump started in reverse rotation Shafts may be bent. Check shafts and couplings. Correct
rotation.
Broken shaft or coupling
1. Can be caused by same reasons listed for coupling
elongation
2. Can also be caused by bearings seized due to lack of
lubrication
3. Foreign material blocking impellers or galling wear rings
4. Metal fatigue due to vibrations
5. Improper impeller adjustment or continuous up-thrust
conditions causing impeller drag
1. Same as above
2. Same as above for bearing seizure
3. Add strainers or screens.
4. Check alignment of the pump components to eliminate
vibration.
5. See Section F (Engineering) for correction.
H5: BOWLS
TROUBLE SOURCE PROBABLE CAUSE REMEDY
Wear on bowl vanes Abrasive action Coat bowls. Upgrade material or rubber line.

11
H6: PACKING BOX
TROUBLE SOURCE PROBABLE CAUSE REMEDY
Excessive leakage
1. Improper packing
2. Incorrect type or defective packing
3. Worn shaft or sleeve
1. Repack correctly.
2. Repack with the correct grade for service.
3. Remachine or replace scored parts.
Packing box overheated
1. Improper packing procedure
2. Packing too tight
3. Insufficient lubrication
4. Incorrect type of packing
1. Repack correctly.
2. Repack with the correct grade for service.
3. Remachine or replace scored parts.
Packing wears prematurely
1. Improper packing
2. Insufficient lubrication
3. Shaft or sleeve scored
4. Incorrect type of packing
1. Remove cause.
2. Replace worn parts.
3. Remachine or replace
I: ORDERING PARTS
Please contact your TACO representative with the serial
number of the pump for more information. The serial number of
the pump can be found on the pump information tag.
NOTES

12
Limited Warranty
Commercial Pump Warranty Terms
(Models FI, CI, FE, CE, KV, KS, TA)
Taco, Inc. will repair or replace without charge
(at the Company’s option) any commercial pump
product or part which is proven defective under
normal use within one year from date of start-up
or one year and six months from date of shipment
(whichever occurs first).
In order to obtain service under warranty, it is
the responsibility of the purchaser to promptly
notify the Company in writing and promptly deliver
the item in question, delivery prepaid to the facto-
ry. For complete details on warranty returns, the
purchaser should contact a local Taco stocking
distributor or the Company. If the product or part
in question contains no defect as covered in this
warranty, the purchaser will be billed for parts and
labor charges in effect at time of factory examina-
tion or repair.
Motors provided on commercial pumps are not
covered by this warranty, and are warranted by the
motor manufacturer. For complete details on motor
warranty returns, the purchaser should contact the
motor manufacturer’s local service repair center or
contact the motor manufacturer directly.
Seals provided on commercial pumps are not
covered by this warranty.
Any Taco product or part not installed or oper-
ated in conformity with Taco instructions or which
has been subjected to misuse, misapplication, the
presence of certain chemicals (such as solvents,
acids, etc.) or other abuse will not be covered by
this warranty. For complete information on chem-
ical and application restrictions, the purchaser
should contact the company.
Taco, Inc. reserves the right to make changes in
details of design, construction, or arrangement of
materials of its products without notification.
Taco, Incorporated offers this warranty in lieu
of all other express or implied warranties. No
warranties are made for merchantability or fitness
for use and there are no warranties which extend
beyond the description contained herein. Taco,
Inc. will not be liable for any special, incidental, or
consequential damages.
NOTES
A Taco Family Company
2019