140 • 180 SERIES
Pump Manual
HORIZONTAL FLEXIBLE COUPLED
Section 140 • 180 Page 500
Dated October 2011
97-4670-01-588
140 • 180 SERIES
1.General Instructions
HORIZONTAL FLEXIBLE COUPLED
PUMPS
A. Inspection of Equipment
B. Storage
C. Placing Stored Pumps Into Service
D. Application Considerations
E. Recommended Spare Parts
When properly installed and given
reasonable care and maintenance,
regenerative turbine pumps should
operate satisfactorily for many years.
Because of the high differential
pressures expected in a regenerative
turbine pump, close running clearances
are used to reduce internal losses.
Abrasive particles, even microscopic
ones, in high enough concentrations,
can open up the close clearances
between internal components. For
critical services it is recommended that
you keep an identical pump for stand-by
use.
1A Inspection of Equipment
Immediately upon receipt of the
shipment, inspect the equipment for
damage or missing components.
Check the shipping manifest and
report any damage or shortage to the
Transportation Company’s local agent.
Inspect the crate and any wrapping
material before discarding. Parts or
accessories are sometimes wrapped
individually or fastened to the skid.
Put the instructions that came with the
shipment in a safe place where they will
be available to those who will be using
them for installation and service.
1B Storage
If the pump is to be stored before use,
it should be inspected as described
in 1A, recrated and stored in a dry
location. Standard shipping containers
are not suitable for outdoor storage.
In some areas, it may be necessary
to cover the pump’s exterior surface
with oil or other rust inhibiting coating.
All units are tested at the factory with
a water/corrosion inhibitor solution,
some of which will remain inside the
pump upon receipt. If units are ushed
out prior to storage, this inhibitor will
be removed and proper care must be
taken to prevent product deterioration
from improper storage.
For storage beyond 30 days, a
corrosion inhibiting protective uid
should be added to the internal pump
cavities. Fluids used in the pump should
be selected for compatibility with pump
materials. This is very important when
optional seal and gasket materials have
been used. Protective caps on the inlet
and outlets should also be used. Caps
alone are not sufcient protection.
1C Placing Stored Pumps Into
Service
Special care must be taken when
placing stored pumps into service. First
clean the outside and ush out the
inside with a process compatible uid.
Try to turn the pump using the coupling.
Applying torque to the motor fan blades
is not recommended. If the impeller
does not break loose immediately, ll
the pump with a process compatible
uid and try again in a few hours.
If this fails, read the disassemblyreassembly instructions. With an
understanding of which are the bolts
used to clamp the entire assembly
together, loosen each of them exactly
three full turns. After lling the pump
with water again, up to 50 foot pounds
of torque may be applied to the coupling
without fear of ruining the impeller
vanes. It should begin to turn well
before this force is reached. Continue
turning the pump while the various
fasteners are returned to their original
positions.
If the unit still won’t turn over, DO
NOT apply further force. Refer to the
Disassembly/Reassembly Instructions
in Section 5 to determine the cause of
the problem.
1D Application Considerations
1D1 Electrical Wiring
All electrical equipment and wiring
should conform to local and National
Electrical Codes. Use the motor
manufacturer’s instructions for
connecting the motor. Note the correct
rotation and wiring diagrams on the
assembly. Make sure the motor rotation
and speed matches that required for the
pump.
1D2 Construction Materials
Wile it is reasonable to assume that
good judgement has been used in
selecting all the materials in the pump
for compatibility with process uids,
actual conditions sometimes vary from
Section 140 • 180 Page 501
Dated October 2011
original specications. Also, typical
material selection charts do not consider
all the temperature, pressure, and uid
variables. The customer’s engineer
should be consulted for nal judgement
on the best materials for critical process
applications.
1D3 Valves
The rst valve to be considered for a
regenerative turbine pumping system
should be a pressure relief valve.
Because this type of pump has a
horsepower requirement similar to
that of a positive displacement pump,
constantly rising hp as pressure
increases, a relief valve can be
effectively used to limit horsepower.
This is helpful when a non-overloading
motor is specied. It can be of
critical importance if the system ow
rate can vary widely. There are
almost no circumstances where
a ow modulating valve will work
successfully in a regenerative
turbine pumping system. The steep
pumping characteristic, typical
of these pumps, produces very
large pressure changes with small
variations in ow rate. As a result,
the modulating ow from the valve
introduces sharp pressure shock
waves that shorten pump life and
may cause damage to other pieces
of equipment in the system.
A swing check valve is recommended
in the suction line even when the pump
inlet is only slightly higher than the uid
source. It should be the same size
as the pump inlet or sized based on
reasonable uid friction losses.
A foot valve is recommended when
lifting uid from a sump. This will save
wear and tear on any pump, even those
equipped with self- priming capability.
A Y-Strainer is recommended
immediately ahead of the pump on
any newly constructed system. This
is advisable due to the probability
that foreign material large enough to
damage pump clearances may remain,
even though the piping has been
ushed.
Valves in the outlet piping of a
regenerative turbine pump should
always be open as far as possible when
the pump is started. This will reduce the
start-up load on the pump and motor.
Section 140 • 180 Page 502
Dated October 2011
Never start the pump with the discharge
valve closed.
Inlet valving should be open when
starting any pumping system. Without
some uid in the pump, the impellers
can gall and lock up. Violent pump
failure will result from continued
operation with the inlet valve closed.
1D4 Priming
Regardless of whether or not selfpriming equipment is used, always
ll the pump with uid and vent it of
air before starting for best seal and
pump life. Under most circumstances,
regenerative turbine pumps can be
made to self-prime as long as a small
amount of uid can be recirculated
through the impeller and the uid
doesn’t heat up noticeably.
1D5 NPSH (Net Positive Suction Head)
The NPSH required varies with every
size and capacity of pump. The NPSH
required by your unit can be obtained
from the performance curves or from
your MTH representative.
If the NPSH available is not equal to or
greater than that required by the pump,
it must be increased or a different
pump selected. The usual method for
increasing NPSH is to raise the static
head on the pump inlet, (Hs).
By denition, NPSH means: “Net
Positive Suction Head” above the
vapor pressure of the pumped liquid
available at the centerline of the
pump. It should always be given in
feet of pumped liquid. The NPSH is
actually a measurement of the amount
of energy available in the pumped
liquid to produce the required absolute
entrance velocity in the pump. If a
pump requires more energy (or NPSH)
than is available at a given capacity, the
pressure at the inlet will fall below the
vapor pressure of the pumped liquid
and loss of performance will result as
the liquid vaporizes.
Ps = Pressure in the suction vessel in
PSIA.
Pvp = Vapor pressure of the pumped
uid in PSIA.
Hs = Static height of the pumped uid
above (+) or below (-) the centerline of
the pump in feet.
Hf = All friction losses from the vessel to
the pump in feet. Then, NPSH = 2.31
Ps - P
vp
( )+ Hs- H
sp. gr.
For boiling liquids, Ps and Pvp are equal.
This item then becomes zero and can
be omitted from the equation.
1D6 Noise
Regenerative turbine pumps typically
produce a high pitched whine that
increases in intensity as the differential
pressure produced in the pump
increases. While high frequency
sound is attenuated more easily than
lower frequencies, piping structures
and the uids in them readily transmit
noise. Motors, bearings, and other
rotating components add to the noise
and sometimes create objectionable
harmonics.
Adequate support for the inlet and
discharge piping is important for noise
reduction.
1D7 Freezing
When ambient temperatures drop
below the freezing point of the uid in
a pump, consideration should be given
to heating, insulating, or draining the
pump. If you choose to drain the pump,
and it will only be for a short period, rst
f
remove the drain plugs, then drain the
inlet and outlet lines. Carefully blow out
the pump with compressed air to clear
all internal cavities of uid.
1E Recommended Spare Parts
FOR CRITICAL SERVICES - a duplex
installation, with two identical pumping
units in parallel, is the safest, and many
times, the most cost effective choice.
FOR IMPORTANT SERVICES - a
standby pump, ready for installation, is
advised.
Special pricing and new pump warranty
is offered for factory rebuilding.
FOR ROUTINE MAINTENANCE
- only the mechanical seals and a
complete set of “O” ring gaskets are
recommended. Should additional
components show wear, they are
available from stock at the factory.
FOR SERVICING A PUMP THAT
DOES NOT PRODUCE RATED HEAD
- mechanical seals, “O” ring gaskets,
impeller, and channel rings.
FOR REBUILDING A PUMP - all the
components required for servicing,
plus bearings, shaft, and drive keys
for exible coupled pumps, should be
obtained. A factory rebuild should be
considered whenever your disassembly
indicates rebuilding is necessary, as this
is usually more economical.
The factory recommendation for spare
parts are all of those listed for rebuilding
a pump and are shown on the exploded
view drawings for each individual type
of pump.
140 • 180 SERIES
2.
Installation
FLEXIBLE COUPLED PUMPS
A. Location
B. Foundation
C. Leveling
D. Alignment
E. Piping
F. Typical Installation
In order to insure that pumping
equipment is installed properly and
to obtain reliable pump operation,
it is recommended that only
experienced, qualied erecting
engineers undertake this task. Read
these instructions thoroughly before
beginning.
2A Location
The rst consideration for locating
a pump is elevation. The lowest
possible elevation using the shortest
possible suction piping is usually the
best. Locations should be compared
by making inlet head calculations,
including all friction losses. The one
producing the highest inlet pressure
should be selected. One reason for
this precaution is that, the greater
the inlet pressure, the less likelihood
of NPSH problems. Also, a ooded
suction is particularly helpful on
start-up when the seals or the entire
pump can be ruined, because it is not
properly primed and purged of air.
A dry, easily accessible location
is also important. Allow ample
Section 140 • 180 Page 503
Dated October 2011
clearance around the unit for free
air circulation. If a dry location is
not available, the pump can be
mounted on a foundation, above
the oor. Specify motor enclosure,
pump materials, or coatings to suit
the worst conditions expected.
Place the pump so that it can be
easily inspected and serviced during
operation. Sufcient head room
should be provided, particularly when
lifting devices will be used for heavier
assemblies.
2B Foundation
Baseplates alone are not rigid
enough to maintain alignment of
the unit. The pump foundation is
used as a support for the baseplate
to maintain alignment of the unit. If
the baseplate is to be grouted to the
foundation, it is only necessary to
embed the edges. It is unnecessary
to completely ll under the baseplate.
DO NOT grout the unit to the
foundation until it has been properly
aligned.
The foundation must be a permanent
rigid installation of concrete or other
material of sufcient mass to absorb
all normal vibrations. Locate the
foundation bolts using a layout or
template in relation to the suction
and discharge piping. If concrete is
being used, foundation bolts of the
specied size can be enclosed in a
pipe sleeve two to three diameters
larger than the bolts to compensate
for minor variations in alignment.
2C Leveling
If the unit is received with the pump
and motor mounted on the baseplate:
1. Place the unit in position.
2. Disconnect the coupling halves.
Do not reconnect until all
alignment procedures have been
completed.
3. Support the baseplate on metal
shims or wedges having a small
taper. (Refer to Figure 2-1)
Figure 2-2
1/4"
Finished Grouting
3/4" to 1 1/2"
Allowance for
Grout
Dam
Figure 2-1
Foundation
a. Place shims close to the
foundation bolts. (Refer to
Figure 2-2)
b. Also place shims close to
where the greatest weight is
located.
4. Check the baseplate for
distortion:
a. Place a straightedge along
the baseplate to determine if
it is distorted.
b. Adjust the shims until the
baseplate is not distorted.
5. Use a section of pipe to
determine if the inlet and
discharge openings are vertical
and located properly.
6. Correct the positions, if
necessary, by adjusting the
shims.
2D Alignment
Although exible coupled pumps
are carefully aligned prior to crating
and shipping, it is very likely that
strains imposed during transit have
altered the alignment. Complete
the following steps after the unit has
been placed on the foundation and
leveled.
A
Figure 2-3
Baseplate
Grout
Leveling Wedges or Shims - Left in Place
Top of Foundation Left
Pipe Sleeve
Washer
Lug
Rough - Clean and Wet
Down
To check the PARALLEL alignment:
(Refer to Figure 2-3)
1. Place a straightedge across the
two coupling anges.
2. Measure the maximum offset
(A), Figure 2-3, at various points
around the periphery of the
coupling. DO NOT rotate the
coupling.
3. Referring to chart 1, If the
maximum offset exceeds the
Parallel dimension in Chart 1
for your sleeve size, loosen the
C
B
Figure 2-4
motor or pump and place thin
metal shims under the motor
or pump feet until the offset is
corrected.
4. Torque down the motor or pump.
5. Recheck alignment.
To check the ANGULAR alignment:
(Refer to Figure 2-4)
1. Using a micrometer or caliper,
measure from the outside of one
ange to the outside of the other
at intervals around the periphery
of the coupling. DO NOT rotate
the coupling.
Section 140 • 180 Page 504
Dated October 2011
2. Determine the maximum (B) and
minimum (C) dimensions.
3. If the difference between the
maximum and minimum exceeds
the Angular dimension in Chart 1
for your sleeve size, loosen the
motor or pump and place thin
metal shims under the motor or
pump feet until the misalignment
is corrected.
CHART 1
COUPLING TYPES JE, J, S
MAX. RPM & ALLOWABLE MISALIGNMENT
MAXIMUM
SIZE
PARALLELAANGULAR
RPM
B-C
3 3600 .010 .035
4 3600 .010 .043
5 3600 .015 .056
6 3600 .015 .070
7 3650 .020 .081
8 3600 .020 .094
4. Torque down the motor or pump.
5. Recheck the parallel alignment
above.
If the parallel or angular misalignment
is great, this is an indication of
baseplate distortion and must be
corrected rst, refer to 2C Leveling.
After all leveling and alignment
operations have been completed,
piping can begin. After the piping
has been completed, refer to 2E1,
Piping Alignment. Alignment of
the unit must then be rechecked
to make certain that no piping
strains are causing distortion.
After approximately two weeks of
operation, check the alignment
again to make sure that temperature
changes, piping strain, or foundation
variations have not caused
misalignment. If alignment has been
maintained over this period, the
pump and motor can be doweled to
the baseplate.
2E Piping
2E1 Alignment
It is important that all piping be lined
up and not forced into place. It is
recommended that you begin piping
at the pump. If the lines are ended at
the pump, particularly if the last piece
is cut a little too short or long, the
pump will be forced to meet the pipe
and strain or distortion will result.
2E2 Piping Support
Never allow the pump to support
piping. Other means, such as
pipe hangers and pipe supports,
should be used to carry piping to
avoid misalignment and distortion.
Consideration should be given to
thermally induced expansion and
contraction, particularly in long runs
of straight pipe.
2E3 Piping Size
In general, the outlet and inlet pipe
sizes should be equal to or larger
than those of the pump.
2F Typical Installation (Refer to
Figure 2-5)
Figure 2-5 shows a typical pump installation, note the use of pipe hangers
and support, as well as, the position of
piping, valves, and components.
Gate Valve
Check Valve
Eccentric
Reducer
Fasten Unit Securely to Founda-
tionin Level Position
Pipe Hangers
Union
Long Suction Lines to have Continual
Rise From Source. Eliminate High Spots
Union and
Spool Piece
Increaser
Vent Plug
Drain
Pipe Supports
Combination
Foot Valve and
Strainer
Figure 2-5
Suction Reservior
Arrangement of Suction Pip-
ing for Head-on Suction
Elbow 10 to 20 Pipe Diam-
eters from Pump Suction
Area of Foot Valve 1
1/2 Times Pipe Area
Area of strainer 3 to 4
Times Pipe Area
140 • 180 SERIES
3.Operation
FLEXIBLE COUPLED PUMPS
A. Rotation
B. Foreign Material
C. Electrical
D. Adjustments
E. Cooling Water
F. Priming
G. Starting
H. Stopping
3A Rotation
The standard direction of rotation
for the pump is right-handed, or
clockwise when looking at the motor
end of the pump. A rotation arrow,
refer to Figure 3-1, is located on the
pump to indicate the correct direction
of rotation.
Operating the pump in reverse will
cause substantial performance
variations and can damage the
pump.
Always conrm correct motor rotation
prior to connection of the coupling.
If this is not possible, perform a nal
rotation check as follows:
1. Jog the motor briey.
3B Foreign Material
All regenerative turbine pumps have
close running clearances in order
to maintain efciency. Take extra
precautions to insure that no foreign
material larger than 25 microns
or .001 inches is allowed to pass
through the pump. Even particles
of this size can damage the pump
if allowed to circulate continuously.
Regenerative turbine pumps are not
designed for slurries.
Large particles, weld spatter, and
other material found in new piping
systems will bend the impeller
vanes and can sometimes lock up
the pump. If a new pump does not
operate properly, the rst thing to
check for is damage from foreign
material.
3C Electrical
It is important to be aware of and
follow the appropriate local and
national electrical codes. Do
not make wiring alterations that
can affect motor rotation without
reconrming correct rotation.
3D Adjustments
Section 140 • 180 Page 505
Dated October 2011
the large close-tting surface area
inside regenerative turbine pumps,
it takes only microscopic residue to
produce substantial resistance to
rotation. Once loosened, however,
this material is quickly dispersed.
Impellers quickly nd thier hydraulic
center. Normal operation may be
expected.
3E Cooling Water
When the pump is used to transfer
hot uids, consideration should be
given to cooling the seals and/or
selecting materials that will give
satisfactory seal life. The actual
temperature at the seal faces, the
most critical area, will always exceed
the surrounding uid temperature.
Seal ush taps or lines must be
ordered from the factory.
3F Priming
Pumps should not be operated
unless they are completely lled
with liquid. Damage to parts of the
pump that depend on liquid for their
lubrication can occur. Impellers can
seize quickly when a pump is run dry.
Also, without lubrication, seal faces
can be damaged from heat buildup.
2. Observe rotation as the unit
comes to a stop.
3. Rotation should be in the
direction of the arrow.
If the motor operates in the wrong
direction:
1. Interchange any two leads on a
three-phase motor.
2. On a single-phase motor,
change the leads as indicated on
the connection box cover. Some
single-phase motors may not be
reversible.
Inlet
Outlet
Rotation
Figure 3-1
No adjustments are necessary or
advisable on new pumps. In view
of the close ts however, it is not
uncommon for regenerative turbine
pumps to be difcult or impossible to
turn over by hand by the time they
have been shipped, mounted and
allowed to dry out inside. In these
cases, it may be necessary to ll
the pump with uid and loosen the
thrubolts exactly one turn.(loosen
guide rods also on the pumps
that have them -see appropriate
assembly drawings) DO NOT
LOOSEN BEARING ARMS - they
are difcult to adjust except as part of
the assembly or reassembly process.
With the thrubolts loose, light tapping
with a soft mallet on the exposed
end of the pump shaft along with
torque applied to the coupling should
have the desired effect. If possible,
spin the pump (or operate with
minimal discharge pressure) while
the thrubolts are retightened exactly
one turn. This action will allow
residue to be ushed from closetting ring and impeller surfaces. With
3G Starting
Before starting a pump for the rst
time, be sure that all the preceding
operations have been carried out.
Proper rotation, priming, and a free
turning pump are most important.
1. Open suction and discharge
valves to allow system to clear of
air.
2. Start the pump with the minimum
possible line restriction.
3. Listen for foreign material being
carried through the pump.
4. Slowly close necessary valves
or otherwise place the pump into
service.
5. Listen for indications of undue
load or other sounds indicating
problems.
6. Use a clip-on ammeter to
check for a steady load after
Section 140 • 180 Page 506
Dated October 2011
Drive End
12 or 13
Part
No. Name Description
Figure 4-11
Part
No. Name Description
1 Cover Inlet & Discharge 13 Seal Rotating Element Balanced (outlet end- 143/183 & 144/184 series)
2 Seal Cup 14 Drive Collar Spirolox
3 Bearing Arm 16 Interstage Bushing (142/182, 143/183, 144/184 series)
4 Snap Ring Bearing Retaining (inlet end only) 17 Shaft
5 Stud Bearing Arm 18 Guide Rod
6 "O" Ring Medium- Seal Cup 19 Thru Bolt Casing
7 "O" Ring Large- Casing 20 Nut Casing and Bearing Arm
8 "O" Ring Small- Guide Rod 20.5 Jam Nut Bearing Arm
9 Channel Ring Right (outer end ring) 21 Flinger
10 Channel Ring Left (inlet end ring) 22 Drain Plug
11 Impeller Turbine 23 Key Impeller and shaft
12 Seal Rotating Element
Unbalanced (inlet end- all pumps)
(outlet end- 141/181 & 142/182 series)
24 Ball Bearing Sealed
12.5 Seal Stationary Seat Both Seals
Section 140 • 180 Page 507
Dated October 2011
approximately fteen minutes of
operation.
140 • 180 SERIES
4.Service
PUMP ENDS
A. Preliminary
B. Tools and equipment
C. Disassembly
D. Inspection of components
E. Reassembly
F. Testing and nal adjustments
4A PRELIMINARY
Before pump service begins, note the
details of the system prior to removal
of the pump. This is sometimes
helpful in determining the cause of
failure when pump life has been less
than expected.
Disconnect inlet and outlet piping.
Disconnect and separate coupling
halves. Remove any dowel pins
from the pump feet. Remove pump
mounting bolts. Lift the pump
carefully from baseplate. The feet
are easily broken if the pump is
dropped. A hoist or other mechanical
lifting aid may be necessary on larger
models. See gure 4-11 for parts
identication.
4B TOOLS AND EQUIPMENT
1. Soft mallet
2. Two jaw gear puller
3. Snap ring pliers
4. Two large screwdrivers
5. Wood blocks as shown in Figure
4-3
6. Side cutters
7. Penetrating oil
8. 5/16” drive pin punch
9. Set of metal numbering stamps
10. 10 or 12 inch crescent wrench
11. 9/16” box end wrench or socket
12. 9/16” open end wrench
4C DISASSEMBLY
1. Starting at the discharge end of the
pump, remove the four nuts (#20)
and four thru bolts (#19).
2. Remove the two nuts (#20) that
hold the outboard bearing arm (#3)
in position.
3H Stopping
It is best to stop the pump with the
least discharge head possible both
for minimizing strain on components
3. The bearing arm (#3) may now
be removed. A gear puller may
be necessary.(refer to gure 4-1)
The outboard ball bearing (#24)
should now be removed. A gear
puller will need to be used for
this operation. If the bearing can
be removed too easily, a worn
bearing surface may be indicated.
Replace the shaft and bearing as
necessary before reassembly.
Figure 4-1
4. Slide the inger (#21) off the shaft.
5. Carefully loosen the two remaining
nuts (#20). Relieve the tension
evenly by turning each nut a
little at a time. This will prevent
the guide rods from becoming
distorted.
6. Using a soft mallet, loosen the
outboard cover (#1) by tapping
lightly around the outside edge.
Slip the cover off the guide rods
(#18) being careful not to bend
them.
7. The seal cup (#2) may be removed
by tapping it towards the inside of
the cover (#1). Using a wooden
block or dowel for this operation,
rather than something metal, will
prevent damage to the seal cup or
seal seat (#12.5).
8. If the seal seat (#12.5) must be
reused, use a wooden dowel sized
to t through the hole in the seal
cup to tap it out.(refer to gure 4-2)
Ceramic seal seats are particularly
easy to damage. Normally,
always replace the seats when
servicing the pump.
and to be in low power mode, in
anticipation of restarting.
Figure 4-2
9. Slide the outboard seal rotating
element (#12 or #13) from the
shaft. If the rotating element
cannot be removed easily, it may
be necessary to apply penetrating
oil or some other lubricant
compatible with the seal material.
If any doubt exists as to what
type of elastomer is used in a
particular seal element, check the
purchase records. Reuse of seals
is not recommended, regardless
of its apparent condition, and
replacement during reassembly is
usually a wise choice. Typically,
one & two stage pumps use a 7/8
inch type 21 Crane or equivalent
seal while three & four stage
pumps utilize a 1 inch type 21B
Crane or equivalent seal on the
high pressure end only.
10. Remove the two “O” rings (#8)
from the guide rods (#18).
11. If a complete disassembly is
to be performed, all the channel
rings (#9 & #10) should be
suitably marked at this time so
that the original orientation and
position can be retained during
reassembly. Note or mark these
rings such that the top to bottom
relationship as well as the order
is maintained. Number stamps
are preferable to less permanent
markings which tend to be lost
during cleaning.
12. Gently tapping the rings around
the outside edges with a soft
mallet will loosen them. Separate
the rst channel ring (#9) and slide
it off the guide rods, exercising
Section 140 • 180 Page 508
Dated October 2011
care to prevent damage. Should
prying be necessary, it should be
done evenly and with great care.
13. On three & four stage pumps, the
drive collar (#14) must be removed
before further disassembly can
continue. A small screwdriver
or pocket knife can be useful for
this task. Damage to the groove
should be avoided.
14. Slide the impeller (#11) off the
shaft. Penetrating oil should be
used if resistance occurs. Prying
impellers off the shaft almost
always ruins the impeller.
15. Remove the next channel ring
(#10) using the same care as with
the rst.
16. Remove the key (#23) from the
shaft. Diagonal side cutters or end
nippers are helpful for this job.
17. For disassembly of single stage
pumps (141/181 models) proceed
to step #20. For all other models
(142/182, 143/183, & 144/184)
proceed to next step.
18. Slide off the next channel ring
(#9). Along with the ring will come
an interstage bushing (#16). Note
the direction the bushing is facing
so that the same surfaces will be
in contact after reassembly.
19. Remove the remaining channel
rings, impellers and interstage
bushings. Stacking the parts
as they are removed will help in
maintaining the proper orientation
and in keeping the impellers with
the same pair of channel rings.
On badly corroded pumps it may
be easier to drive the guide rods
(#18) back through each ring
rather than sliding the ring the
entire length of the rods. If this is
to be done, care should be taken
not to “mushroom” the rod ends
by tapping with too much force. A
soft face hammer and/or brass rod
is recommended. Penetrating oil
helps greatly.
20. Turn the pump around and
remove the two nuts (#20) holding
the bearing arm (#3) in place.
21. Removing the bearing arm will
require the use of a gear puller
since the bearing (#24) is held in
the bearing arm by means of a
snap ring (#4). Removal of the
bearing arm will bring the bearing
along with it.(see gure 4-1)
22. Slide the rubber inger (#21) off
the shaft.
23. The remaining internal parts; the
shaft (#17) and the seal rotating
assembly (#12) will slide easily out
of the cover (#1).
24. The shaft extension end seal
rotating assembly (#12) can be
removed in the same manner as
was the outboard rotating element.
25. To complete the disassembly,
remove the two “O” rings (#8) and
two guide rods (#18).
26. Press out the shaft extension
end stationary seat (#12.5) using
the same procedure as on the
outboard seat.
27. The remaining seal cup (#2) can
be removed from the cover by
driving it outward from the inside.
4D INSPECTION OF
COMPONENTS
Thoroughly clean all parts. All
components should be examined
for wear and corrosion. Replace
parts that show visible wear. If the
pump was no longer producing
sufcient pressure or capacity, it is
a safe assumption that clearances
between rings and impeller exceed
an acceptable amount. At least
the impellers should be replaced in
this case. If the total side running
clearance for an impeller exceeds
.007”, it is unlikely that pump
performance will reach that of a new
pump, except at lower discharge
pressures.
“O” rings and other elastomeric
components should be replaced if
they have been deformed or cut.
If seal components must be reused,
carefully inspect for microscopic
cracks and nicks. Scratches that
might be ignored elsewhere can
produce leakage if they are on
seal carbons and seat wearing
surfaces. Cleanliness is imperative
when working with mechanical
seals. Almost unnoticeable particles
between seal faces can be, and often
are, the cause of early seal failures.
Check to be certain that a press t
still exists between the shaft and the
bearings. New bearings, or at least
cleaned and regreased bearings, are
recommended.
All impellers and interstage bushings
are designed to oat, therefore they
should move easily on the shaft. No
more than .0l0” diametral clearance
should exist between the shaft and
the inside of an interstage bushing.
More than this can produce hydraulic
unbalance that can quickly wear out
the impellers. As long as impellers
can be moved on the shaft by hand,
they are loose enough. If they can
be rocked or wobbled, they are
denitely too loose and must be
replaced.
Check the shaft for galling, pitting,
and corrosion. If there are worn
areas between stages of multistage
pumps, the shaft should be replaced.
Pitting or corrosion in the area where
the seal comes in contact is also
cause for shaft replacement. This
will cause leakage under the seal.
Surface corrosion must be removed
so that seals can slide freely during
assembly. The shaft diameter
should be no smaller than .002 inch
below the nominal fractional seal
sizes. Remove any nicks or burrs
which may have occurred during
disassembly. Reclean parts as
necessary.
4E REASSEMBLY
1. Begin reassembly with the inlet
cover (#1). Thread two nuts (#20)
onto the guide rods (#18), and
slide them through the two holes
at six and twelve o’clock. Push
them in until the underside of the
nuts contacts the cover.
2. Slide two “O” rings (#8) over the
extended ends of the guide rods
until they touch the cover.
3. It is recommended that the
assembly be placed on blocks in a
vertical position as shown.(refer to
gure 4-3)
4. Place an “O” ring (#7) into the
groove in the face of the cover
Section 140 • 180 Page 509
Dated October 2011
Figure 4-3
(#1). Slide a left hand channel ring
(#10) onto the guide rods with the
water channel facing up.(refer to
gure 4-4) With the pump feet in
the “six o’clock” position, the large
inlet opening should be at “eleven
o’clock”.
Figure 4-4
5. Put another “O” ring (#7) in place
and a key (#23) into the shaft.
6. Slide an impeller (#11) onto the
shaft (#17) and over the key (#23)
nearest the drive end.(refer to
gure 4-5) Place the impeller-
shaft assembly into the ring, with
the shaft extension down. If the
blocking is the correct height, the
shaft end should contact the bench
at the same time the impeller
covers the key.
Figure 4-6
ring (#9), and an impeller (#11)
between them.
8. Single stage pumps (141/181
model) should proceed to step
#17. For pumps with more than
one stage, (models 142/182,
143/183, or 144/184) proceed to
next step.
9. Slide an interstage bushing onto
the shaft. The smooth wearing
face should be installed against
the ring (#9).(refer to gure 4-7)
Figure 4-7
10. Place another “O” ring (#7) into
position.
11. Slide another left hand channel
ring (#10) into place with the water
channel facing up.(refer to gure
4-8) This time, however, place
the large inlet opening in the “ve
o’clock” position. By locating
successive stages 180 degrees
from the last, hydraulic loads are
radially balanced.
Figure 4-9
toward the impeller.(refer to gure
4-9) The small discharge opening
should be in the “seven o’clock”
position.
15. Continue installing stages
depending on how many stages
are in the pump. Don’t forget
the interstage bushings and “O”
rings (#7). Remember also to
stagger the ring sets to balance
radial loads. The odd numbered
stages should have openings at
the top of the pump as described
for the rst stage installation.
Even numbered stages should
have their openings downward as
indicated for the second stage.
16. After the last impeller has been
installed in three or four stage
pumps, a drive collar (#14) must
be installed to locate the seal
rotating element. If the groove is
hidden, tap the shaft gently from
the coupling end until it becomes
just visible.
17. Add the last “O” ring (#7) and two
“O” rings (#8) onto the guide rods
(#18).
18. Slide the cover (#1) over the
exposed guide rods, bringing it
up against the last channel ring.
Check to make sure the feet on
both covers are in the “six o’clock”
position.
Figure 4-5
7. Slide a right hand channel ring (#9)
onto the guide rods with the water
channel facing downward, toward
the impeller.(refer to gure 4-6)
The small outlet opening should
be in the “one o’clock” position.
This completes one stage; a stage
consisting of one left hand channel
ring (#10), a right hand channel
Figure 4-8
12. Add another Key (#23) and an
impeller (#11).
13. Put another “O” ring (#7) into
place.
14. To complete the second stage
assembly, install a right hand
channel ring (#9) facing downward
19. Install two nuts (#20) onto the
guide rods and tighten enough to
hold the entire assembly in place.
Do not try to tighten them to their
nal position.(refer to gure 4-10)
Figure 4-10
Figure 4-12
20. Install "O" ring or cup elastomer
on the seal seat,(#12.5) lubricate
the elastomer and carefully press
the seat into the seal cups.(#2)
(refer to gure 4-12) A clean soft
material should be used between
the seal face and pressing tools.
The smoothest side of the seat
should face up. Caution: Dirt and
scratches can quickly ruin seals.
Place an “O” ring (#6) into the
groove around each seal cup.
21. When installing seats and rotating
elements, a thin lm of compatible
lubricant may be applied to seal
surfaces. This will help seals to
become mated when they rst
come in contact. Seal Lube
Glycerine, ethylene glycol, and
mineral oil are sometimes selected
for use on standard seals which
use EPR elastomer. Do not use
a petroleum based lubricant in
standard seals.
22. The seal rotating element can
now be installed.(refer to gure
4-13) One and two stage pumps
position both seals (#12) by a
shoulder on the shaft. Three and
four stage pumps locate the rear
seal (#13) by means of a drive
collar (#14). The seal rotating
element, when lubricated, must
be allowed to move freely on the
shaft. This will enable the seal
to seek a hydraulic balance upon
operation.
Figure 4-14
24. Press a inger (#21) onto the
shaft until it is against the seal
cup.
25. Solidly supporting the bottom end
of the shaft, drive or press a ball
bearing (#24) onto the shaft until
it rests rmly against the shoulder
on the shaft.(refer to gure 4-15)
A sleeve properly sized to contact
only the inner bearing race will be
helpful for this operation.
Figure 4-15
26. Tap a bearing arm (#3) over the
bearing and retain with two nuts
(#20). They should be nger tight
only.
27. Remove the pump from the
support blocks and place it on its
feet.
28. Insert the four thru bolts (#19)
and install nuts (#20). Tighten all
six nuts evenly until about one full
turn before being fully torqued.
Return the assembly to the wood
blocking with its shaft extension
up. Install the seal rotating
element (#12), seal cup assembly
(#2), and inger (#21) with the
same procedure as on the other
end.
Section 140 • 180 Page 510
Dated October 2011
Figure 4-16
A 3/8” or 1/2” nut works well.
The pump will be unstable in
this position. It is well to have
necessary tools at an easy
reach. Drive the bearing arm
assembly onto the shaft until the
bearing rests against the shoulder
provided. Driving should be done
with a sleeve contacting the inner
race only.(refer to gure 4-16)
Secure with two nuts (#20), nger
tight.
4F TESTING AND FINAL
ADJUSTMENTS
1. Check to be sure the pump rotates
freely. If not, determine why and
resolve any problems before
proceeding. Incorrect assembly
or the presence of foreign material
has probably occurred.
2. For optimum nal adjustment,
remount the pump, make coupling
and piping connections. Check for
correct rotation.
3. Open inlet and outlet valves and
start the pump when the uid has
displaced air from it. The pump
may leak at this time, but a fully
open discharge should prevent
substantial uid losses.
Figure 4-13
23. Install the seal cup with the face
of the seal towards the rotating
element. A short length of pipe
will help to tap the cup down until
it contacts the ring.(refer to gure
4-14)
29. Drive a ball bearing (#24) into a
bearing arm (#3), applying force
to the bearing’s outer race only.
Insert a snap ring (#4) into the
groove provided in the bearing
arm. The beveled side of the snap
ring faces away from the bearing.
30. Place a metal support under
the shaft opposite the extension.
4. Evenly tighten all six nuts (#20).
A noticeable change in RPM is
an indication that the nuts are not
being tightened evenly. Torque to
20 foot pounds.
5. Evenly tighten the two nuts
(#20) on the driver end bearing
arm. Torque no higher than 5
foot pounds. If signs of distress
Section 140 • 180 Page 511
Dated October 2011
are evident, back off evenly until
the pump runs smoothly again.
Lock the bearing arm in place by
turning the two jam nuts (#20.5)
in a counterclockwise direction.
The bearing arm is now correctly
positioned and should remain so
until service is again required.
6. Evenly tighten the two nuts
(#20) on the discharge end of
the bearing arm. With a new
pump or one with new rings and
impellers, these nuts cannot
be tightened very much before
distress becomes noticeable.
140 • 180 SERIES
5.
Troubleshooting
FLEXIBLE COUPLED PUMPS
A. Failure to Pump
B. Reduced Capacity
C. Reduced Pressure
D. Pump Loses Prime After Starting
E. Excessive Power Consumption
F. Pump Vibrates or is Noisy
G. Mechanical Problems
H. Seal Leakage
5A Failure to Pump
1. Pump not up to speed — Use
Tachometer to determine actual
RPM. Check voltage and wiring
connections.
2. Pump not primed — Conrm
that pump and all inlet piping are
lled with uid.
3. Discharge head too high
— Install a pressure gauge at
the pump discharge to determine
the actual operating pressure.
Compare readings with pump
performance curve. A larger
pump may be necessary.
4. Excessive suction lift —
Relocate pump, supply tank, or
both to minimize suction lift.
5. Wrong direction of rotation
— Compare pump rotation
with arrow on pump. Standard
pumps rotate in a clockwise
direction when looking at the
shaft extension end or from the
motor end on close-coupled
pumps. Reverse two leads
on a three-phase motor to
Back off slightly until the pump
runs smoothly. Use the two jam
nuts (#20.5) to lock this bearing
arm in position as was done in
step #5. On an older pump, the
nuts (#20) on both ends may be
tightened up to 20 foot pounds.
Depending on the condition of the
pump, tightening these nuts can
improve and sometimes restore
performance. Jam nuts (#20.5)
should always be loose enough
to allow sensitive adjustment of
bearing arms when performing
these operations. Turn them
counterclockwise until they contact
change rotation. Check motor
nameplate for single-phase
operation.
6. Clogged suction line, strainer, or
foot valve — Inspect and clean
out if necessary.
7. Air pocket in suction line
— Look for high spots in inlet
piping system. Evacuate the
system with a vacuum pump if
necessary.
5B Reduced Capacity
1. Pump not up to speed — Use a
tachometer to determine actual
RPM. Check voltage and wiring
connections.
2. Excessive suction lift —
Relocate pump, supply tank, or
both to minimize suction lift.
3. Insufcient NPSH — Relocate
pump, supply tank, or both
to improve NPSH available
if possible. Increase suction
pressure. Reduce uid
temperature. Select a pump with
lower NPSH requirements.
4. Mechanical damage — Rotate
the pump by hand to determine
if there are tight spots. Broken
or bent impeller vanes can
sometimes be detected in this
manner. If there is a suspicion
of damage, remove the pump
from service and disassemble for
inspection.
bearing arms when adjustments
are complete.
7. This completes the necessary
adjustments. The pump is now
ready for service.
8. If an Amprobe or other current
measuring device is used as
the system is returned to normal
operation, a variation or wavering
will be noticed as the pump
impellers seek their hydraulic
balance. It sometimes requires
a few hours or even days to
complete this positioning.
5. Air leak in the suction line
— Fill the system with uid and
hydrostatically test. Tighten
connections or replace leaky
components.
6. Air pockets in the suction piping
— Operating the system at
maximum ow conditions will
usually clear the lines. Evacuate
the system with a vacuum pump
if necessary.
7. Suction lines, strainer, or foot
valve too small or clogged
— Inspect and clean out as
necessary. Fittings and lines
should be at least equal to the
pump suction size.
8. Discharge head too high
— Install a pressure gauge at
the pump discharge to determine
the actual operating pressure.
Compare readings with pump
performance curve. A larger
pump may be necessary.
9. Excessive wear — If a pump
had previously performed
satisfactorily and now
gives evidence of reduced
performance, it should be
disassembled and examined
for wear after more simple
possible problems have been
investigated.
5C Reduced Pressure
1. Pump not up to speed — Use a
tachometer to determine actual
RPM. Check voltage and wiring
connections.
Section 140 • 180 Page 512
Dated October 2011
2. Air or vapor in liquid — Install
a separator in the suction line.
Check the seal on the inlet end
of the pump to determine if air is
being drawn in. Hydrostatically
test the system to insure that
there are no leaks.
3. Mechanical wear or damage
— Rotate the pump by hand to
determine if there are tight spots.
Broken or bent impeller vanes
can sometimes be detected
in this manner. If there is a
suspicion of damage or wear,
remove the pump from service
and disassemble for inspection.
Look for wear on the impeller
and channel rings.
4. System head less than expected
— Replace pump with higher
capacity unit or add a valve
or orice to increase line
resistance.
5D Pump Loses Prime After
Starting
1. Leak in suction line — Fill
the system with uid and
hydrostatically test. Tighten
connections or replace leaky
components.
2. Air entering pump through
inlet seal or “O” rings —
Hydrostatically test the pump
and look for leaks. Replace
faulty seals or “O” rings.
3. Insufcient NPSH or too much
suction lift — Relocate pump,
supply tank, or both to improve
inlet conditions. Increase
suction pressure. Reduce uid
temperature. Select a pump with
lower NPSH requirements.
5E Excessive Power Consumption
1. Speed too high — Check RPM
with tachometer.
2. Discharge head too high
— Install a pressure gauge
at the discharge to determine
the actual operating pressure.
Compare readings with pump
performance curve. A different
pump, motor, or both may be
necessary.
3. Specic gravity or viscosity too
high — Check uid involved.
A different motor may be
necessary.
4. Mechanical damage — Turn
pump over by hand. After a few
days run-in period, all models
should turn over by hand with
no tight spots. An exception to
this is when the pump has been
idle for some time. In this case,
run the pump for a few hours
before checking for tight spots.
If there is a suspicion of damage,
remove the pump from service
and disassemble for inspection.
5. Pump not fully “broken in”
— It is normal for new pumps
to consume higher than
normal current during the
break-in period. If high power
consumption persists beyond
a few weeks, it is unlikely that
further operation will reduce
consumption.
6. Pump not properly adjusted —
Loosen all nuts on pump exactly
one turn. Follow the instructions
in Section 5F Testing and Final
Adjustments, for repositioning
fasteners.
5F Pump Vibrates Or Is Noisy
1. Pump and motor are misaligned
— Follow the instructions in
Section 2D Alignment, for proper
alignment.
2. Insecure mounting — Follow
instructions in Section 2, 2B
Foundation.
3. Piping load on pump — Install
piping supports and check to
see that there is no strain on the
pump.
4. Mechanical damage
— If mechanical damage
is suspected, check rst to
determine if the pump turns
freely. Disassemble for
inspection if tight spots are
found.
5. Pump has a high pitched
whine — This is typical of a
regenerative turbine pump.
The intensity should increase
as pressure increases. Over
a period of a few weeks the
noise level will diminish and
will be noticeably quieter as it
approaches a “run-in” condition.
5G Mechanical Problems
1. Short bearing life — Bearings
damaged due to leaky seals.
Coupling misalignment. Piping
load on pump. RPM or pump
pressure too high.
2. Pump locked up — Pump dried
out and close clearance areas
rusted. Follow installation
instructions for loosening the
pump. Foreign material in
pump. Flush out. Disassemble
if ushing is not successful.
3. Pump leaks — Seal or “O”
rings are usually the problem.
Disassembly and replacement is
the solution if tightening the thru
bolts has no effect.
5H Seal Leakage
1. Worn seat or rotating element
— Seals will last many years
operating on cold clear water
or other uids with reasonable
lubricity. Particles, even
microscopic, increase normal
wear rates. Temperatures
near the uid’s boiling point
can reduce lubricity, which in
turn increases wear. Some
chemicals will erode the seal
faces or plate out on the faces
producing an abrasive effect.
Immediate seal replacement
is recommended when leaks
become evident, since bearings
are quickly ruined when exposed
to moisture. Severe mechanical
damage results when the
bearings fail.
2. Improperly installed seat or
rotating element — If a seal
has recently been replaced,
look for a missing “O” ring/cup
around the seat, or a seat
that was installed cocked
or backwards. The smooth
surface should face the
rotating element. The rotating
element may be in backward or
improperly positioned. Refer to
the appropriate seal diagrams
and instructions to conrm the
correct seal orientation. Rotating
Section 140 • 180 Page 513
Dated October 2011
elements sometimes stick in the
wrong position if left partially
assembled for some time. Make
sure a rotating element can be
moved axially on the shaft before
closing up the pump, and then
make the nal adjustments as
soon as possible.
3. Seat broken during assembly
— Ceramic seats are particularly
vulnerable to damage. Carefully
follow reassembly instructions
for seals. Seals on ex-coupled
units can be damaged by
excessive hammering when
installing the coupling onto the
shaft extension.
4. Pitted shaft under the seal —
Reusing a shaft or sleeve when
repairing a pump is the probable
cause of this problem. The seal
rotating element can produce
140 • 180 SERIES
6.Parts and Repair Services
A. Parts
B. Repair Service
C. Warranty Service
D. Motors, Mechanical Seals,
and Accessories
6A Parts
Repair parts may be obtained
through your local Authorized MTH
Pumps Representative or Distributor
who can be found in the yellow pages
or by contacting MTH Pumps at:
401 W. Main St. • Plano, IL 60545
Phone: 630-552-4115
Fax: 630-552-3688
6B Repair Services
Repair service for an MTH pump
should be obtained from the company
through which it was purchased.
In the event this is not possible, the
name and phone number of a nearby
MTH representative or distributor
may be obtained by contacting
MTH Pumps. In the event that it
is necessary to return the pump to
the factory for repairs, remove all
accessories attached to the pump.
We cannot accept responsibility for
their safe removal, storage, and
return.
6C Warranty Service
All requests for warranty claims
should be made through the
company from which the pump was
purchased or supplied. Complete
details on what is wrong with the
pump must be provided along with
information on the system in which it
is installed. Refer to the MTH Pumps
Limited Warranty statement. Return
authorization must be obtained prior
to returning any equipment.
a pitted surface underneath
its elastomer portion during
normal use. This is normally
not a problem for the rst seal
assembly since the elastomer is
conforming as this action occurs.
A new seal can leak before it
conforms if the pits are large
enough. If any pits are visible to
the unaided eye, shaft or sleeve
replacement is advised.
6D Motors, Mechanical Seals, and
Accessories
Repair or replacement service on
motors, mechanical seals, relief
valves, or other accessories should
be obtained from the manufacturer
of these components. MTH does not
carry replacement parts and is not
authorized to render repair service
on these components. Replacement
mechanical seals are stocked at
MTH and are always available
insofar as possible for immediate
shipment. Warranty service, as well
as expert application information
can be obtained from your local seal
manufacturer’s sales ofce.
Section 140 • 180 Page 514
Dated October 2011
140 • 180 SERIES
Limited Warranty
7.
MTH makes good faith recommendations of Products, based on its experience and the application information provided by the Purchaser. However, the
responsibility for testing and approving a Product to be used for a particular purpose lies with the Purchaser.
The obligations of MTH Tool Company, Inc. (hereinafter referred to as “MTH”), with respect to a “Product” (dened below) are limited as set forth herein.
ALL IMPLIED WARRANTIES, including the “implied warranty of merchantability” and the “implied warranty of tness for a particular purpose” are
There are no warranties which extend beyond the description on the face hereof.
MTH warrants that, during the “Warranty Period” (dened below), the “Product” (dened below) will not fail to meet the “Operational Specications” (dened
below), within applicable industry tolerances established by the Hydraulic Institute, due to defects in its materials and workmanship. MTH does not warrant that
any Product will meet the “Operational Specications” in conditions other than the Standard Operating Conditions, unless agreed to by MTH in a signed writing.
For all purposes of this Limited Warranty:
(a) The term “Warranty Period” shall mean the twelve (12) month period from the date of shipment from MTH to the Purchaser (the “Warranty
Period”).
(b) The term “Product” shall mean: any item or assembly of items sold by MTH that are either manufactured or selected by MTH to meet the
“Operational Specications”. The term “Product” does not include any item, assembly of items, or portion of such assembly that is selected or
specied by any entity other than MTH, or that MTH has identied as ineligible for warranty coverage.
(c) The term "Purchaser" shall mean the original person(s) or entity that issued the purchase order to MTH, for the Product.
(d) The term “Operational Specications” shall mean the specied dimensions, material composition, and performance parameters of a Product,
as published by MTH, or as otherwise agreed in a signed writing between MTH and Purchaser. “Standard Operating Conditions”, for pumps,
shall mean: operating with clean water, at standard temperature and pressure. “Operational Specications” shall not include visual appearance or
any other parameters not expressly agreed to in writing.
If, within the Warranty Period, a Purchaser believes that a Product has failed to meet its Operational Specications, the Purchaser must request a Return
Goods Authorization (“RGA”) in the manner specied at http://www.mthpumps.com, and supply any additional information MTH might reasonably request. If the
Product was purchased through a distributor or any entity other than MTH, the RGA request must be made through that entity. Any Product returned without an
RGA will be refused at the dock. Products authorized for return must be properly packaged to prevent further damage, clearly marked with the Return Goods
Authorization “RGA” number provided by MTH, and shipped freight prepaid and allowed, F.O.B. the MTH factory at Plano, Illinois, USA.
MTH may, in its sole discretion, deny any warranty claim if shipping damage, any attempted disassembly, or any other action outside of MTH’s control impairs
MTH’s determination of the existence of, or cause of a claimed failure.
Notwithstanding anything to the contrary in this Limited Warranty, MTH shall have no obligation to repair or replace any Product it determines to have any
defects arising from or attributable to: (1) abrasion, corrosion, or erosion arising after shipment from MTH; (2) improper handling, packaging, installation,
storage, or maintenance, after it is shipped by MTH; (3) repairs or alterations outside of MTH’s factory, in any manner, without MTH’s written authorization; (4)
misuse, negligence, or accident after shipment from MTH; (5) use in a manner inconsistent with MTH’s published instructions and Operational Specications,
or other written specications agreed to by both Purchaser and MTH; or (6) incorrect power supply or power quality. MTH’s determination with respect to the
applicability of this Limited Warranty to any particular defect or Product shall be nal and conclusive.
If, after examination by an authorized representative of MTH, MTH determines that the Product failed to meet the “Operational Specications”, within applica-
ble industry tolerances established by the Hydraulic Institute, due to defects in its materials and workmanship, during the Warranty Period, then MTH will, at
its option, ship a repaired or replaced Product to the Purchaser, F.O.B. MTH’s factory in Plano, Illinois, U.S.A., freight prepaid and allowed. MTH will use a
freight provider of its choosing, via a method no faster than that used for shipping the Product to MTH. MTH may, at its sole discretion, issue a credit memo to
Purchaser for some or all Purchaser’s shipping costs to return a defective Product to MTH.
MTH accepts no responsibility for costs associated with removal and reinstallation of Products.
Under no circumstances shall MTH be liable for incidental or consequential damages.
MTH neither assumes responsibility for, nor authorizes any person to assume for it, any other obligation in connection with the sale of any Product or any
enlargement of this Limited Warranty.
Some States do not allow the exclusion or limitation of incidental or consequential damages. So, the above limitations or exclusions might not apply
to you. This warranty gives you specic legal rights, and you might, also, have other rights, which vary from State to State.
By using this Product, you agree that this Limited Warranty is governed by the laws of the State of Illinois; that this Limited Warranty shall be inter-
preted and enforced only in accordance with the laws of the State of Illinois (excluding its conicts of law provisions); and that you submit yourself
to the jurisdiction of the 23rd Judicial Circuit, Kendall County, Illinois, which shall have exclusive jurisdiction over any controversy or dispute arising
under or with regard to this Limited Warranty.
HEREBY DISCLAIMED.
Section 140 • 180 Page 515
Dated October 2011
97-4670-01-588
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