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MTH Tool Company, Inc. / MTH Pumps,
hereinafter referred to as “MTH”, war-
rants for a period of twelve (12) months
from the date of shipment (“The War-
ranty Period”), that the pumps
manufactured by it will be free from
defects in material and workmanship.
MTH will correct defects in material or
workmanship which may develop in its
products under proper or normal use
during the Warranty Period and under
the conditions of this Warranty.  This
Warranty does not extend to anyone
except the original consumer-purchas-
er.  Damage to the product due to
improper handling, improper storage,
improper maintenance, or improper ap-
plication is not covered by this
Warranty.  Warranty claims for motors,
mechanical seals, and accessories
should be directed to those who manu-
factured the component.  MTH will
repair or replace, at its option and ex-
pense, its products proved to be

defective after examination by the Com-
pany.  The defective Product must be
returned, transportation prepaid, to the
factory at Plano, Illinois.  Disassembly
of the equipment impairs determination
of reasons for failure and shall be cause
for voiding this Warranty.  The Product,
repaired or replaced, will be shipped
f.o.b. MTH’s factory.  This is MTH's
sole warranty.    MTH makes no other
warranty of any kind, expressed or
implied, and all implied warranties of
merchantability and fitness for a par-
ticular purpose which exceed MTH's
aforestated obligations are hereby
disclaimed by MTH and excluded
from this warranty. 
 MTH neither as-
sumes nor authorizes any person to
assume for it, any other obligation in
connection with the sale of the Product
and any enlargement of this Warranty
by a purchaser shall be for its own
account and its exclusive responsibility.
This Warranty shall not apply to any

7.

Limited Warranty

Product or parts of Products which:  (a)
have been repaired or altered outside of
MTH’s factory, in any manner; or (b)
have been subjected to misuse, negli-
gence or accident; or (c) have been
used in a manner contrary to MTH’s
printed instructions; or (d) have been
damaged due to defective power supply
or faulty installation.    MTH shall not be
liable for incidental and consequen-
tial losses and damages under this
express warranty, any applicable im-
plied warranty, or claims for
negligence, except to the extent that
this limitation is found to be unen-
forceable under the applicable State
law.  Some States do not allow the
exclusion or limitation of incidental
or consequential damages, so the
above limitation or exclusion may
not apply to you.  This warranty gives
you specific legal rights, and you
may also have other rights which
vary from State to State.

6A Parts

Repair parts may be obtained
through your local Authorized MTH
Pumps Representative or Distribu-
tor 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.

6.

A. Parts
B. Repair Service
C. Warranty Service
D. Motors, Mechanical Seals,

and Accessories

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.

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 applica-
tion information can be obtained
from your local seal manufacturer's
sales office.

Parts and Repair Services

T51 SERIES

T51 SERIES

MTH PUMPS

401 West Main Street  •  Plano, IL  60545-1436

Phone:  630-552-4115   •   Fax:  630-552-3688

Page 520

Dated January 2000

97-4623-01-588

Summary of Contents for T51 SERIES

Page 1: ...PUMPS VERTICAL FLANGE MOUNTED CLOSE COUPLED PUMPS FLEXIBLE COUPLED PUMPS Section T51 Page 501 Dated January 2000 97 4623 01 588 MTH PUMPS 401 West Main Street Plano IL 60545 1436 Phone 630 552 4115 Fa...

Page 2: ...refer to the disassembly reassembly instruc tions in Section 4 Loosen the thrubolts clamping the assembly together three full turns no more Fill the pump with water Apply torque 50 foot pounds maximum...

Page 3: ...ne of the pump in feet Hf All friction losses from the vessel to the pump in feet NPSH 2 31 Hs Hf For boiling liquids Ps and Pvp are equal This item then becomes zero and can be omitted from the equat...

Page 4: ...on it is only necessary to embed the edges It is unnecessary to completely fill under the baseplate DO NOT grout the unit to the foundation until it has been properly aligned The foundation must be a...

Page 5: ...ipe 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...

Page 6: ...peller vanes and can sometimes lock up the pump If a new pump does not operate properly the first thing to check for is damage from foreign material 3D Electrical It is important to be aware of and fo...

Page 7: ...o the self primer 1 A check valve necessary to maintain a vacuum in the suction line as surging occurs in the pump 2 An air eliminator used on the discharge side of the pump to separate air from liqui...

Page 8: ...To disassemble the pump Refer to Figures 4 4 and 4 5 for reference to the numbered parts in the procedures below 1 Remove all liquid from the pump Air blown through the pump will remove the water quic...

Page 9: ...Thin blade screwdriver 7 Two large blade screwdrivers 8 Cealube G or similar glycol base lubricant DO NOT use petroleum products To disassemble the pump Refer to Figures 4 11 and 4 12 for reference t...

Page 10: ...acement seat be installed during reassembly 4D Inspection of Components Thoroughly clean all parts All components should be examined for wear and corrosion Replace any parts that show visible wear If...

Page 11: ...installed in the motor bracket before the bracket is installed on the motor To install the seat a Place the motor bracket face up on a flat surface 15 14 1 7 125 12 23 11 23A 60 19 2 18 20 b Carefull...

Page 12: ...of the motor bracket i While maintaining inward pressure on the sleeve with one hand line up the collar setscrews with the key in the shaft sleeve one setscrew on each side of the key j Tighten the se...

Page 13: ...he seat cavity of the motor bracket Care must be taken not to damage the seat face Thumb pressure is usually sufficient to install the seat 2 Install the motor bracket a While holding the motor bracke...

Page 14: ...peller hub should be facing out away from the motor bracket c If the impeller does not fit repeat steps a and b to determine the problem 5 Place O ring 7 into the O ring groove in the motor bracket It...

Page 15: ...a plastic or wooden mallet gently tap on the end of the shaft until it slides out of the frame Both bearings should come out with the shaft Do not use a metal hammer severe damage to the shaft will o...

Page 16: ...aring to insure proper installa tion and to prevent bearing damage The bearings must seat against the shoulder for proper alignment Refer to Figure 4 23 Also refer to Alternate bearing installation pr...

Page 17: ...earing Pedestal 30 23 17 24 4 21 3 33 24A 30 23 17 24 4 33 24A 3 NAME DESCRIPTION PART NO QTY Bearing Pedestal 3 1 Snap Ring Bearing Retainer 4 1 Shaft 17 1 Flinger 21 1 Key Coupling 23 1 Ball Bearing...

Page 18: ...n 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 M...

Page 19: ...ent 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...

Page 20: ...er this express warranty any applicable im plied warranty or claims for negligence except to the extent that this limitation is found to be unen forceable under the applicable State law Some States do...

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