MTH PUMPS E51, T51 User Manual

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T51 • E51 SERIES

Pump Manual

HORIZONTAL CLOSE COUPLED PUMPS VERTICAL FLANGE MOUNTED CLOSE COUPLED PUMPS FLEXIBLE COUPLED PUMPS

Section T51 • E51 Page 501

Dated February 2014

97-4623-01-588

Distributed in the UK by.....

Pump Engineering Limited. Unit B1, Riverside Industrial Estate, Littlehampton, West Sussex, BN17 5DF, United Kingdom Tel: 01903 730900 Fax: 01903 730234 email: sales@pumpeng.co.uk Web: www.pumpeng.co.uk

T51 • E51 SERIES

General Instructions

Section T51 • E51 Page 502

Dated February 2014

HORIZONTAL CLOSE COUPLED PUMPS VERTICAL FLANGE MOUNTED CLOSE COUPLED PUMPS 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. They do not, however, have a service life equal to that of low head centrifugal pumps, which are not subjected to the typical differential pressures produced by the regenerative turbine pump. 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, re-crated 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 corro-

sion 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 suf-

cient 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 or shaft. On close coupled units, access to the shaft is between the pump and motor. A vise grip or other plier type gripping device may be used directly on the shaft. 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, loosen only the pump cover thru bolts clamping the assembly together, one full turn, no more. Fill

the pump with uid. Apply torque,

50 foot pounds maximum, to the shaft. The pump should turn before 50 foot pounds is reached. If you are successful at breaking loose the unit, continue turning the pump while re-tightening the thru bolts 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

While it is reasonable to assume that good judgment has been used in selecting all the materials in the pump for compatibility with process

uids, actual conditions sometimes vary from original specications.

Also, typical material selection charts do not consider all the temperature,

pressure, and uid variables. The

customer’s engineer should be

consulted for nal judgment on the

best materials for critical process applications.

1D3 Valves

The rst valve to be considered for a

regenerative turbine pumping system might 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 along with pressure increases) a relief valve can be effectively used to limit horsepower. This is helpful when a non-overload-

ing motor is specied. 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 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 in other pieces of equipment in the system. If a shutoff valve is necessary in the suction line, use a gate, ball, but-

tery, or other full port valve. Globe or other ow restricting valves can in some cases reduce pump ow or

increase chances of cavitation. A swing check valve is recommended in the suction line even when the

Section T51 • E51 Page 503

Dated February 2014

pump inlet is even 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. Never start the pump with the discharge valve closed. The inlet valving should be open when starting any pumping system.

Without some uid in the pump, it can

gall and lock up impellers. Violent pump failure will result from continued operation with the inlet valve closed.

1D4 Priming

Regardless of whether self-priming

equipment is used or not, always ll

the pump 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 denition, 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.

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.

Ps - P

NPSH = 2.31( )+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. Careful pump installation can alleviate noise problems. Proper alignment of the pump and driver is essential. Adequate supports for the inlet and discharge piping is equally important. A degree of noise reduction may be obtained when the pumping unit is supported free of building structures by the use of

vibration isolators and exible piping

and conduit connections. Elastomer type couplings are the best choice to

separate motor noises from the uid

and piping structure.

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 remove the drain

plugs, and 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. Turn around time can be as short as one or two days for standard models.

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, motor bracket, and cover.

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 needed for rebuilding a pump and are shown on the exploded view drawings for each individual type of pump.

T51 • E51 SERIES

Installation2.

FLEXIBLE COUPLED PUMPS CLOSE 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, qualied erecting engineers undertake this task. Read the 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. Questions regarding possible locations should be resolved 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 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. Sufcient

head room should be provided, particularly when lifting devices will be used for heavier assemblies.

2B Foundation

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 sufcient 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

specied size can be enclosed in a

pipe sleeve two to three diameters larger than the bolts to compensate for minor variations in alignment.

Close coupled pumps can be mounted on a steel base prior to installation or mounted directly to the foundation. Place shims under one or more of the motor feet so that strain and distortion will not result when the mounting bolts are tightened.

2C Leveling (Flexible Coupled Pumps Only, Refer to Figure 2-1)

If the unit is received with the pump

and motor mounted on the baseplate:

1. Place the unit in position.

Figure 2-1

1/4”

Finished Grouting

3/4” to 1 1/2” Allowance for Grout

Section T51 • E51 Page 504

Dated February 2014

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 2-2)

a. Place shims close to the foun-

dation bolts. (Refer to Figure 2-3)

Figure 2-3

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 base-

plate 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.

Baseplate

Grout

Leveling Wedges or Shims - Left in Place

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

Dam

Foundation

Figure 2-2

Pipe Sleeve

Washer

Lug

Top of Foundation Left Rough - Clean and Wet Down

Section T51 • E51 Page 505

Dated February 2014

The standard coupling supplied by MTH Pumps has an elastomer member between two internal serrated

anges. They have smooth outsides

of equal diameter. These surfaces are used for alignment procedures.

To check the PARALLEL alignment:

(Refer to Figure 2-4)

1. Place a straightedge across the

two coupling anges.

2. Measure the maximum offset (A), Figure 2-4, at various points around the periphery of the coupling. DO NOT rotate the coupling.

Figure 2-4

3. If the maximum offset exceeds the Parallel 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 offset is corrected.

4. Torque down the motor or pump.

5. Recheck alignment.

To check the ANGULAR alignment:

(Refer to Figure 2-5)

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.

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.

4. Torque down the motor or pump.

5. Recheck the parallel alignment above.

CHART 1

COUPLING TYPES JE, J, S

MAX. RPM & ALLOWABLE MISALIGNMENT

SLEEVE

SIZE

MAXIMUM

RPM

PARALLELAANGULAR

B-C

3 9200 .010 .035

4 7600 .010 .043

5 7600 .015 .056

6 6000 .015 .070

If the parallel or angular misalignment is great, this is an indication of baseplate distortion and must be cor-

rected 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 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, outlet and especially inlet pipe sizes should be equal to or larger than those of the pump.

This may not, however, be the nal

determining factor. Many things, including installation and operating costs are involved in the decision.

Careful use of the pipe and tting

friction loss tables (as shown in the Hydraulic Institute manual), along with the appropriate pump performance curve, should be the basis for judgments.

Figure 2-5

T51 • E51 SERIES

Operation

Section T51 • E51 Page 506

Dated February 2014

FLEXIBLE COUPLED PUMPS CLOSE COUPLED PUMPS

A. Rotation B. Inlet and Outlet Locations C. Foreign Material D. Electrical E. Adjustments F. Cooling Water G. Priming H. Starting I. 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 conrm 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 briey.

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.

Outlet

3B Inlet and Outlet Locations (Refer to Figure 3-1)

The pump inlet is located on the end farthest from the motor. The

discharge or “outlet” can be on the

top, side, or bottom depending on the model and construction of the pump. Normal discharge position is on top.

3C Foreign Material

All regenerative turbine pumps have close running clearances in order

to maintain efciency. 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 will 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 oper-

ate properly, the rst thing to check

for is damage from foreign material.

3D 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 reconrming correct

rotation. Select starter heaters and wiring for the maximum current the motor can use at full service factor loads. When making electrical connec-

tions to motors provided with threaded stud electrical terminals, the recommended torque should be 13-16 inch-lbs. Applying torque in excess of this range

Rotation

Outlet

may cause damage. Regenerative

turbine pumps will typically use extra power for a period until they run in. This can take three to four weeks depending on the duty cycle. During

this period, impellers are nding their

hydraulically balanced position.

3E Adjustments

No adjustments are required or advisable on new pumps, other than those required for installation. Because of the tight tolerances of regenerative turbine pumps, it is not uncommon for the pump to be

difcult to turn over by hand after the

internal parts have been allowed to dry out . New pumps from the factory are tested using rust inhibiters to help preclude this possibility. On site

system ushing may remove these

inhibitors and subject the pump to the risk of lock up, if it is allowed to dry

out. In this case, do the following:

1. Fill the pump with uid (wait 2

hours).

2. Insert 5/32” Allen wrench into lock collar setscrew and rotate shaft, using the Allen wrench as a handle. (DO NOT LOOSEN SETSCREW)

3. Remove the Allen wrench.

4. Jog the pump momentarily using the on/off buttons if so equipped.

5. This should “break” the impeller

loose without damage, unless foreign material has entered the pump.

This procedure will ush residue from the close tting impeller surfaces. If

not immediately successful, refer

Rotation

Inlet

Figure 3-1

Inlet

Outlet

Inlet

Rotation

Section T51 • E51 Page 507

Dated February 2014

to Section 1, 1C Placing Stored Pumps Into Service. Because of the

large areas of close tting surfaces

inside these pumps, it takes only microscopic residue to produce substantial resistance to rotation. Once loosened, this material is quickly

dispersed and the impellers nd their

hydraulic center. If these procedures are followed carefully, no damage

will result from “breaking loose” the

impeller.

3F 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. If seal ushing lines have not been installed,

heat can build up on the seal faces

to a degree that may destroy the uid lm necessary to prevent rapid wear.

In some cases it is necessary to cool

the seal ushing uid. Refer to the

seal manufacturers charts for guidance, or to selection data in the MTH

catalog, any time uids can reach or

exceed their boiling point.

3G 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. Without lubrication, seal faces can be damaged from heat buildup. Pumps can be easily primed with a vacuum pump. An ejector or liquid ring vacuum pump is recommended because they are not damaged if liquid enters them. Connect the vacuum line to the discharge side of the pump, either in the discharge opening or the drain tap. A foot valve is not necessary when this kind of device is used. When a vacuum pump is not practical, a foot valve in the suction inlet can be used to prevent liquid from running out. The pump and suction line can then

be lled completely from an outside

source. A vent opening will be nec-

essary during lling to let air escape.

A tight foot valve will keep the pump constantly primed so that automatic

operation is possible. The valve should be inspected regularly to see that it does not develop leaks, allowing the pump to run dry. Optional self-priming casings are available for MTH pumps allowing priming when a vacuum pump or foot valve is not

practical. Refer to specic literature

for details.

There are four components to 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 liquid so the liquid can be used again as air is carried through the pump.

3. A recirculating line - carries liquid from the air eliminator to the suction.

4. A uid chamber - used on the inlet side to provide a supply of uid to

speed up priming.

Small suction lines are desirable to minimize priming time.

Using the self priming casing, it is

only necessary to:

1. Open the plugs in both the inlet and discharge chambers.

2. Pour uid in one until both are full.

3. Tighten both plugs.

4. Turn on the pump.

Priming time depends on lift, volume of air in the suction line, and the size of the regenerative turbine pump used. If priming time is long and the pump becomes warm, rell the priming chambers with fresh liquid. Most turbine pumps will pump twenty-six to twenty-eight inches of mercury vacuum with cold water in the pump, but have very little capacity and therefore are not practical at lifts over twenty-two feet. The best way to prime a pump and

keep it primed is to use a ooded

suction. While this is not always practical, it does provide a number of

advantages. The likelihood of pump damage from dry running is eliminated. Suction lines may be large, reducing line losses and minimizing the potential of cavitation damage. There are no check valves or priming devices to fail or require maintenance. Whenever possible, design

pumping systems with a ooded

suction.

3H 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. Start the pump with the minimum possible line restriction.

2. Open discharge valves before pressing the starter.

3. Start the pump and let the system clear of air.

4. Listen for foreign material being carried through the pump.

5. Slowly close necessary valves or otherwise place the pump into service.

6. Listen for indications of undue load or other sounds indicating problems.

7. Use a clip-on ammeter to check for a steady load after ap-

proximately fteen minutes of

operation.

3I Stopping

It is best to stop the pump with the least discharge head possible both for minimizing strain on components, and to be in low power mode in anticipation of restarting. If the pump will be down for more than a few weeks it is advisable to drain it. Follow the instructions for long term storage, Section 1 , 1B Storage. After any prolonged stoppage, turn the pump over by hand before restarting, to be sure it is free.

T51 • E51 SERIES

Service

Section T51 • E51 Page 508

Dated February 2014

PUMP ENDS

A. Preliminary B. Disassembly C3 & P3 C. Disassembly C15 & P15 D. Disassembly D3 (E51) E. Inspection of Components F. Reassembly C3 & P3 G. Reassembly C15 & P15 H. Reassembly D3 (E51) H. Testing and Final Adjustments

4A Preliminary

Before attempting any service on the pump or motor, disconnect the electrical power to the pump motor. If the pump and motor are to be removed as a unit, note the wiring conguration. Use colored or numbered tape to mark the wire connections of the motor and power source, for reconnection. If the pump is being used to transfer hot liquid, let the pump and liquid cool before starting disassembly.

1. Disconnect the inlet and outlet piping before unbolting the pump and motor. If the pipes are corroded, use penetrating oil on the threads to aid in removal.

2. Unbolt the motor from the base and remove the unit. All work on the unit should be performed on an elevated workbench whenever possible.

The disassembly and reassembly procedures are broken into four sec-

tions covering the following units:

4B — Disassembly of the C3 and P3

Units (3 hp and under)

4C — Disassembly of the C15 and

P15 Units (5 hp and up)

4D — Reassembly of the D3 (E51)

Units

4F — Reassembly of the C3 and P3

Units

4G — Reassembly of the C15 and

P15 Units

4H — Reassembly of the D3 (E51)

Units

Exploded views of each unit, Figures 4-4, 4-5, 4-11, and 4-12, are provided for referencing the numbers in the following procedures, i.e. (#1), motor bracket.

4B Disassembly (C3 and P3)

The following tools and equipment are needed for disassembly of C3

and P3 units:

1. Soft plastic or wooden mallet.

2. Small ball peen hammer.

3. 9/16” wrench or socket.

4. 5/32” hex wrench.

5. Penetrating oil.

6. 1” wood dowel (Approx. 6” long).

7. Thin blade screwdriver.

8. Two large blade screwdrivers.

9. Cealube G or similar glycol base lubricant. (DO NOT use petroleum products.)

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 quickly.

2. Remove the two (2) nuts (#20), and the two (2) 3/8” X 4” bolts (#19) from the cover (#2).

3. Remove the cover. In some cases light tapping with a plastic or wooden mallet on the outside diameter of the cover may be required to loosen it from the motor bracket. Care should be taken if a screwdriver is needed to pry between the cover and motor

bracket. Damage to the “O” ring

(#7) and/or impeller can result.

4. Remove the impeller (#11), refer to Figure 4-1. The impeller is a slip t and, under normal conditions, can be removed by gently tapping on the end of the shaft sleeve with a mallet. Leave the impeller key (#23) in place. Strik-

Figure 4-1

ing the sleeve too hard could damage the seat or rotating element.

5. Using the 5/32” hex wrench, loosen the set screws (#15) in the locking collar (#14), located on the shaft sleeve between the motor bracket and the motor face. The collar should now be loose on the sleeve. Note the condition of the setscrew in the collar and replace if necessary.

6. Remove the shaft sleeve (#17).

The sleeve is a keyed t and is

removed using two large screwdrivers, Refer to Figure 4-2.

Figure 4-2

a. Insert the blades of the

screwdrivers between the springholder on the rotating element and the shoulder of the shaft sleeve.

b. Holding the screwdrivers at

approximately 3 o’clock and 9 o’clock, push the handles in toward the motor body, using the motor bracket for leverage.

7. In some cases a rocking motion of the screwdrivers will be necessary to break the sleeve loose. Normally the rotating element will slide off with the sleeve. DO NOT attempt to remove the sleeve by rotating it. (Previous models have used a threaded shaft and different procedures are required in these cases.)

8. Remove the rotating element from the sleeve. Refer to Figure 4-3. The element normally adheres tightly to the sleeve and some force may be necessary to remove it. This is common and if care is taken, the element can be reassembled and reused. It

is recommended that a new rotating element be used for

d. Care must be taken with

the seats. They are often a brittle material and are prone to breakage. It is recommended

that a new replacement seat be installed during reassembly.

Section T51 • E51 Page 509

Dated February 2014

reassembly. DO NOT attempt to

Figure 4-3

remove the seal using a screwdriver or other sharp object. Extensive damage to the shaft, sleeve, or element could occur.

9. Before the motor bracket (#1) can

be removed, the four (4) “O”rings

(#8), located on the upper left and right studs must be removed.

a. Gently tap on the back of the

motor bracket, alternating between the left and right side, until the motor bracket moves approximately 1/4”.

b. Tap the motor bracket face to

move it back to its original position.

c. Remove the “O” rings by sliding

them off the studs.

d. Slide the motor bracket straight

off. Do not attempt to remove

the motor bracket without rst removing the “O” rings (#8).

10.Remove the seat portion of the seal, Refer to Figure 4-6.

Figure 4-6

a. Place the motor bracket face

down on a at surface.

11.It is not necessary to remove the locking collar (#14) on the motor shaft unless motor repairs are planned. Note the condition of the setscrew in the collar and replce if necessary. The two studs (#18) may also be left in the motor face.

4C Disassembly (C15 and P15)

The following tools and equipment are needed for disassembly of C15

and P15 units:

1. Soft plastic or wooden mallet.

2. 9/16” wrench or socket.

3. Two 10” or larger adjustable

wrenches.

4. Penetrating oil.

5. 1” wood dowel ( Approx. 6” long).

6. 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 to the numbered parts in the disassembly below.

1. Remove all liquid from the pump.

2. Remove the two (2) 3/8” nuts

(#20), and the two (2) 3/8” X 4” bolts (# 19) from the cover. (#2)

3. Remove the cover. In some

cases, light tapping with a plastic or wooden mallet on the outside diameter of the cover may be required to loosen it from the motor bracket. Care should be taken if a screwdriver is needed to pry between the cover and motor

bracket. Damage to the “O” ring

(#7) and/or impeller can result.

Figure 4-7

ing the sleeve too hard could damage the seat or rotating element.

5. Remove the impeller drive hub, Refer to Figure 4-8. Two (2) adjustable wrenches are used to remove the impeller drive hub (#14).

Figure 4-8

a. Adjust one wrench to t over

the sleeve and engage the impeller key. Adjust the second

wrench to t the impeller nut

(#15).

b. Holding both wrenches, turn the

impeller nut counter-clockwise.

c. After the impeller nut is re-

moved, the impeller drive hub can be removed.

d. The hub is keyed and can be

removed using two large bladed screwdrivers.

e. Insert the blades of the screw-

drivers between the spring holder on the rotating element and the shoulder of the hub.

f. Holding the screwdrivers at

approximately 3 o’clock and 9 o’clock, push the handles in toward the motor body, using the motor bracket for leverage. Refer to Figure 4-9. This pro-

b. Look into the opening in the

center of the bracket, you will see a portion of the seat.

c. Insert the 1” dowel and, very

gently, tap the seat until it drops out.

4. Remove the impeller (#11), refer to Figure 4-7. The impeller is a slip t and, under normal conditions, can be removed by gently tapping on the end of the shaft sleeve with a mallet. Leave the impeller key (#23) in place. Strik-

Figure 4-9

Section T51 • E51 Page 510

Dated February 2014

cedure usually does not require excessive force. Care should be taken not to damage the hub or motor shaft.

6. Remove the rotating element from the shaft. The element normally adheres tightly to the motor shaft and some force may be necessary to remove it. This is common and if care is taken, the element can be reassembled and reused. It is recommended

that a new rotating element be used for reassembly. DO NOT

attempt to remove the seal using a screwdriver or other sharp object. Damage to the shaft or element can occur.

7. Before the motor bracket (#1) can

be removed, the four (4) “O”rings

(#8), located on the upper left and right studs must be removed.

a. Gently tap on the back of the

motor bracket, alternating between the left and right side, until the motor bracket moves approximately 1/4”.

b. Tap the motor bracket face to

move it back to its original position.

c. Remove the “O” rings by sliding

them off the studs.

T51

E51

d. Slide the motor bracket straight

off. Do not attempt to remove

the motor bracket without rst removing the “O” rings (#8).

8. Remove the seat portion of the seal. Refer to Figure 4-10.

a. Place the motor bracket face

Figure 4-10

down on a at surface.

b. Look into the opening in the

center of the bracket, you will see a portion of the seat.

c. Insert the 1” dowel, and very

gently, tap the seat until it drops out. Care must be taken with the seats. They are often a brittle material and are prone to breakage. It is recommended

T51 C3

125

23A

that a new replacement seat be installed during reassembly.

4D Disassembly D3 (E51)

The following tools and equipment are needed for disassembly of E51

Series Pumps:

1. Soft plastic or wooden mallet.

2. Small ball peen hammer.

3. 9/16” wrench or socket

4. Snap ring pliers.

5. Penetrating oil.

6. 1” wood dowel (Approx. 6” long.)

7. Thin blade screwdriver.

8. Cealube G or similar glycol base lubricant. (DO NOT use petroleum products.)

To disassemble the pump:

Refer to Figure 4-4 for reference to the numbered parts in the procedures below.

1. Remove all liquid from the pump.

2. Remove the four (4) 3/8” X 4” bolts (#19) from the cover. (#2)

C3 - D31 - P3 CLOSE

COUPLED PUMP

NAME/DESCRIPTION

Motor Bracket 1 1 Cover 2 1 “O” Ring/Casing 7 1 “O” Ring/Guide Rod 8 4 Impeller 11 1 Snap Ring 4 1 Seal Rotating Element 12 1 Seal Stationary Seat 125 1

Lock Collar/Sleeve 14 1 Setscrew/Lock Collar 15 2 Shaft Sleeve 17 1 Guide Rod (Qty. 4 on Stainless Steel) 18 2 ThruBolt (Qty. 0 on Stainless Steel) 19 2 Nut (Qty. 4 on Stainless Steel) 20 2 Pipe Plug/Drain 22 1 Optional Vent/Port Plug* 22A 1 Key/Impeller Drive 23 1 Key/Sleeve Drive 23A 1

22A Not Shown

*Serial Number Specic

Contact factory for size

PART

NO.

QTY.

E51 D3

Figure 4-4

Optional Cover Congurations

Section T51 • E51 Page 511

Dated February 2014

bracket. Damage to the “O” ring

(#7) and/or impeller (#11) can result.

4. Remove the impeller(#11), refer to Figure 4-11. This is easily done by setting the motor on end. The impeller is a slip t and under normal conditions, can be removed by hand or by gently tapping on the end of the shaft with a mallet. Striking the shaft too hard could damage the seat, rotating element, or the motor. After

Figure 4-11

E51 D3

125

removing the impeller, the impeller key (#23) needs to be removed from the shaft keyway.

5. Remove the snap ring (#4) from the shaft; note the spring that is held in place by the snap ring. Remove the spring from the shaft.

6. To remove the rotating element (#12), gently slide the motor bracket (#1) forward on the shaft to move the rotating element high enough to be removed by hand. Using tools on the rotating element may damage the rotating element or the seat. Take precautions to keep the rotating element clean if it is to be reused.

7. Next remove the motor bracket.

8. To remove the seat (#125). Refer to Figure 4-12. Place the motor

bracket face down on a clean at

surface. Look into the opening in the center of the motor bracket, and you will see a portion of the seat. Insert the 1” dowel and, very gently, tap the seat until it drops out. Care must be taken

T51

125

23A

with the seat. It is often a brittle

Figure 4-12

material and is prone to breakage. It is recommended that a new replacement seat be installed during reassembly.

4E Inspection of Components

Thoroughly clean all parts. All components should be examined for wear and corrosion. Replace any parts that show visible wear. If the

pump was not producing sufcient

pressure or capacity, the clearances between the casing and impeller probably exceed the maximum allowable clearance. At minimum, the impeller 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.

The “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

C3 - D3 VERTICAL FLANGE

MOUNT PUMP

E51

Figure 4-5

NAME/DESCRIPTION

T51 C3

Motor Bracket Cover/Vertical 2 1 “O” Ring/Casing 7 1 “O” Ring/Guide Rod 8 4 Impeller 11 1 Snap Ring 4 1 Seal Rotating Element 12 1 Seal Stationary Seat 125 1 Lock Collar/Sleeve 14 1 Setscrew/Lock Collar 15 2 Shaft Sleeve 17 1 Guide Rod 18 2 ThruBolt 19 2 Nut 20 2 Pipe Plug/Drain 22 1 Key/Impeller Drive 23 1 Key/Sleeve Drive 23A 1 Gasket 60 1

PART NO. QTY.

1 1

Section T51 • E51 Page 512

Dated February 2014

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 the impeller, it is designed to

oat. It should slide easily on the

shaft. As long as it can be moved on the shaft by hand, it is loose enough. If the impeller can be rocked or wobbled, it is too loose and must be replaced.

Check the shaft for galling, pitting, and corrosion. If the shaft is heavily corroded where the seal comes in contact with it, the motor shaft must be replaced. Surface corrosion must be removed so that seals can slide freely during assembly. The shaft diameter should be no smaller than .002” below the nominal fractional seal sizes. Remove any nicks or burrs which may have occurred during disassembly. Re-clean parts as necessary.

23A

4F Reassembly (C3 and P3)

All parts should be visually inspected and cleaned or replaced as outlined in 4D above.

1. The seal seat (#125) must be installed in the motor bracket before the bracket is installed on the mo-

tor. To install the seat:

a. Place the motor bracket face up

on a at surface.

b. Carefully press the seat,

smooth side up, into the seat cavity of the motor bracket. To make the installation of the seat easier, apply a thin coating of compatible lubricant to the elastomer portion of the seat prior to installation. Care must be taken not to damage the seat face. Thumb pressure is

usually sufcient to install the

seat.

2. Install the motor bracket.

a. Make sure the locking collar is

positioned on the motor shaft.

b. While holding the motor bracket

with the outlet port facing up, slide the bracket over the two (2) studs on the motor face.

c. Slide the bracket back until

the feet are resting against the motor face. Light tapping may be necessary to seat the motor bracket in the proper position.

125

d. Install the four (4) “O” rings (#8)

on the two studs. This will help hold the bracket in place during the remainder of the assembly operation.

3. Install the shaft sleeve and rotating element as a unit.

a. Place the sleeve in an upright

position with the smaller end facing up.

b. Lubricate the shaft sleeve and

rotating element.

c. Be sure to install a key (#23A)

in the motor shaft before installing the sleeve and seal assembly.

d. Holding the element assembly

between the thumb and index

nger of both hands, refer to

Figure 4-13, slide the assembly over the sleeve until the spring holder rests against the shoulder of the sleeve.

e. The element must slide freely

up and down on the sleeve. It

C15 - P15 CLOSE

COUPLED PUMP

NAME/DESCRIPTION

Motor Bracket 1 1 Cover 2 1 “O” Ring/Casing 7 1 “O” Ring/Guide Rod 8 4 Impeller 11 1 Seal Rotating Element 12 1 Seal Stationary Seat 125 1 Drive Sleeve/Impeller Drive 14 1 Impeller Nut 15 1 Guide Rod (Qty. 4 on Stainless Steel) 18 2 ThruBolt (Qty. 0 on Stainless Steel) 19 2 Nut (Qty. 4 on Stainless Steel) 20 2 Pipe Plug/Drain 22 1 Optional Vent/Port Plug* 22A 1 Key/Impeller Drive 23 1 Key/Sleeve Drive 23A 1

PART

NO.

QTY.

P15

C15

Figure 4-11

22A Not Shown

*Serial Number Specic

Contact factory for size

Optional Cover Congurations

Figure 4-13

is necessary to maintain some downward pressure on the element because the spring tension could dislodge the seal portion of the element.

f. Holding the assembled sleeve

between the thumb and index

nger, slide the assembly onto

the motor shaft.

g. Push the sleeve on until it

comes in contact with the locking collar.

h. Position the collar over the

sleeve end and push the sleeve on until the seal spring holder

C15

23A

Figure 4-12

is 1/32” to 1/16” below the impeller wearing surface of the motor bracket. Check for adequate running clearance between the lock collar and the motor and the lock collar and the pump.

i. While maintaining inward pres-

sure 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 setscrews snugly.

k. Pressure can now be released,

the sleeve should remain in position. The spring holder must be below the impeller wearing surface of the motor bracket for proper impeller operation.

4. Install the impeller.

a. Place a key (#23) in the shaft

sleeve.

b. The impeller is a slip t and

should slide on rmly but easily

until it stops against the impeller wearing surface. Force should not be required to install the impeller in the correct position.

125

Section T51 • E51 Page 513

Dated February 2014

c. The impeller hub should be

facing out away from the motor bracket. Refer to Figure 4-4 and 4-5.

d. If the impeller does not t,

repeat steps a. and b. to determine the problem.

5. Place “O” ring (#7) into the “O”

ring groove in the motor bracket. It is helpful to stand the motor and pump assembly on end for this procedure.

6. Place the cover over the studs and install the two (2) 3/8” nuts and two (2) 3/8”X4” bolts. Tighten the nuts and bolts systematically, alternating diagonally across the cover.

7. After the nuts and bolts are “snugged up”, make sure the impeller is not binding by inserting a 5/32” hex wrench into the locking collar and moving it left to right. The collar should rotate with little or no resistance. If the collar will not turn, loosen the two (2) 3/8” nuts and bolts equally until the impeller moves freely.

Proceed to Section 4H Testing and Final Adjustments.

4G Reassembly (C15 and P15)

All parts should be visually inspected and cleaned or replaced as outlined in 4D above.

C15 VERTICAL FLANGE

MOUNT PUMP

NAME/DESCRIPTION

Motor Bracket 1 1 Cover/Vertical 2 1 “O” Ring/Casing 7 1 “O” Ring/Guide Rod 8 4 Impeller 11 1 Seal Rotating Element 12 1 Seal Stationary Seat 125 1 Drive Sleeve/Impeller Driver 14 1 Impeller Nut 15 1 Guide Rod (Qty. 4 on Stainless Steel) 18 2 ThruBolt (Qty. 0 on Stainless Steel) 19 2 Nut (Qty. 4 on Stainless Steel) 20 2 Key/Impeller Drive 23 1 Key/Sleeve Drive 23A 1 Gasket 60 1

PART

NO.

QTY.

Section T51 • E51 Page 514

Dated February 2014

1. The stationary seat (#125) must be 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 at surface.

b. To make the installation of the

seat easier, apply a thin coating of compatible lubricant to the elastomer portion of the seat prior to installation.

c. Carefully press the seat,

smooth side up, into the seat cavity of the motor bracket. Care must be taken not to damage the seat face. Thumb

pressure is usually sufcient to

install the seat.

2. Install the motor bracket.

a. While holding the motor bracket

with the outlet port facing up, slide the bracket over the two (2) studs (#18) on the motor face.

b. Slide the bracket back until

the feet are resting against the motor face. Light tapping may be necessary to seat the motor bracket in the proper position.

c. Install the four (4) “O” rings (#8)

on the two studs. This will help hold the bracket in place during the remainder of the assembly operation.

3. Install the sleeve hub and rotating element as a unit.

a. Place the sleeve in an upright

position with the smaller end facing up.

b. Lubricate the motor shaft with

a small amount of glycol based lubricant.

c. It is generally easier to remove

the entire head or sealing

assembly from the spring and install it on the motor shaft. Refer to Figure 4-14. This assembly lifts out of the rotating element spring.

d. After removal, apply a thin layer

of lubricant to the elastomer portion of the seal.

e. Holding the head assembly

between the thumb and index

nger, with the sealing face

pointing toward the stationary seat, slide the assembly over the motor shaft until it rests against the seat. Refer to Figure 4-14. A slight twisting motion will allow the assembly to slide more easily.

f. Check to see that the head as-

sembly is against the seat face.

g. Position the rotating element

spring with the spring holder resting against the shoulder of the sleeve hub.

h. Align the keyway slot in the hub

assembly, and the key in the motor shaft. Refer to Figure 4-15,

Figure 4-15

i. Slide the hub and spring as-

sembly over the shaft until the hub is properly seated and the spring is positioned correctly on the rotating element head previously installed. Refer to Figure 4-11 and 4-12.

j. While maintaining inward

pressure on the hub, install the impeller nut. Refer to Figure 4-16.

k. Tighten the nut as far as pos-

sible by hand.

l. Pressure can now be released.

m. To tighten the nut, place a

crescent wrench over the hub sleeve and engage the drive key.

n. Place a second crescent

wrench over the nut and tighten in a clockwise direction until it is secured. Refer to Figure 4-17.

Figure 4-17

4. Install the impeller.

a. The impeller is a slip t and

should slide on rmly but easily

until it stops against the impeller wearing surface. Force should not be required to install the impeller in the correct position.

b. The impeller hub should be

facing out away from the motor bracket.

c. If the impeller does not t,

repeat steps a. and b. to determine the problem.

5. Place “O” ring (#7) into the “O”

ring groove in the motor bracket. It is helpful to stand the motor and pump assembly on end for this procedure.

6. Place the cover over the studs and install the two (2) 3/8” nuts and two (2) 3/8”x4” bolts. Tighten the nuts and bolts, systematically alternating diagonally across the cover. Do not over-tighten the

nuts and bolts; nal adjustment

will be made after the unit is in operation.

Figure 4-14

Figure 4-16

4H Reassembly D3 (E51)

All parts should be visually inspected and cleaned or replaced as outlined in 4E above.

Section T51 • E51 Page 515

Dated February 2014

1. The seal seat (#125) must be installed in the motor bracket (#1) before the bracket is installed on

the motor. To install the seat:

a. Place the motor bracket face up

on a at surface.

b. Apply a coating of compatible

lubricant to the elastomer portion of the seat to aid with installation.

c. Carefully press the seat,

smooth side up, into the seat cavity of the motor bracket. Thumb pressure is usually

sufcient to install the seat.

2. Install the motor bracket. This is best done with the motor standing on end. Make sure that both the face of the motor and the feet of the motor bracket are clean. Slide the motor bracket over the shaft onto the motor.

3. Install the rotating element (#12). Lubricate I.D. of the rotating element. Place the rotating element on the shaft with the carbon end towards the seat. Place the spring over the shaft, with the backing plate up and compress the spring to locate the rotating element against the seat. If this fails to seat the rotating element gently push the rotating element down with a thin blade screwdriver being careful not to damage the seat or the rotating element.

4. Compress and hold the seal spring slightly below the snap ring groove and install the snap ring (#4). Make sure the snap ring is locked in the groove.

5. Install the impeller key (#23) into the shaft keyway.

6. The impeller is a slip t and should slide on rmly but easily

until it stops against the impeller wearing surface. Force should not be required or used to install the impeller in the correct position. The impeller hub should be facing out away from the motor bracket. Refer to Figures 4-4 and 4-5.

7. Next, rotate the impeller by hand, the impeller should move freely.

8. Place the large “O” ring (#7) into the outside “O” ring groove in the

motor bracket.

9. Place the cover over the motor bracket and install the two (2) nuts (#20) and the two (2) 3/8”x4” bolts. Tighten the bolts systematically, alternating diagonally across the cover. Do not over-tighten the bolts. Final adjustment will be made after the unit is in operation.

4I Testing and Final Adjustment

The pump is now ready for installation. Final adjustments will be made with the pump in operation.

1. Reconnect the electrical connections referring to the colored or numbered tape used to mark the wires during disassembly.

2. Connect all piping and ll the pump with uid.

3. Make sure all valves are open,

and uid will ow through the

system.

4. Start the pump and make the nal

adjustments to the 3/8” nuts and bolts holding the cover on. These nuts and bolts must be torqued to 20 ft. lbs. to obtain proper performance.

5. Check for leaks on pump and piping. Special attention should be given to the seal area at the rear opening in the motor bracket.

6. Under pressure, the impeller will

nd its “hydraulic” balance.

7. Using an amprobe or similar device, check for motor overload.

8. While the impeller is seating, it is common to experience some variance in readings. After a run-in period the readings should level off.

This completes the adjustment and testing phase. The pump is ready for service.

T51 • E51 SERIES

4.Service

BEARING PEDESTALS

A. Preliminary B. Disassembly C. Inspection of Components D. Reassembly E. Testing and Final Adjustments

4A Preliminary (P3 and P15)

1. Disconnect the inlet and outletpiping before unbolting the pump. If the pipes are corroded, use penetrating oil on the threads to aid in removal.

2. Unbolt the pump from the base and remove. Disassembly instructions for the pump are found in section 4, T51 PUMP ENDS. All work on the unit should be performed on an elevated workbench whenever possible.

The disassembly and reassembly procedures are broken into two sec-

tions covering the following units:

4B — Disassembly of the P3 and

P15 Bearing Pedestals

4D — Reassembly of the P3 and

P15 Bearing Pedestals

Exploded views of each unit, Figures 4-19 and 4-20 are provided for referencing the numbers in the following

procedures, i.e. inger (#21).

4B Disassembly (P3 and P15)

The following tools and equipment are needed for disassembly of the P3

and P15 units:

1. Remove the inger (#21) located

in the pump end of the bearing pedestal (#3).

2. Using a snap ring plier, remove snap ring (#4).

3. Open the jaws of the vice approximately 2-1/4” for model P3 and 3” for model P15.

4. Place the pedestal, pump side down, on the jaws. Refer to Figure 4-18.

Figure 4-18

5. Using 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 occur.

6. Using the arbor press remove the two (2) bearings from the shaft. Refer to Figure 4-21. If the inner race is well supported during this operation, no damage will be done to the bearings.

Section T51 • E51 Page 516

Dated February 2014

Figure 4-22

until the bearing is removed. Refer to Figure 4-22.

P3 P15

Inside Diameter 1” 1 1/4” Outside Diameter 2” 2 3/4”

3. Repeat step 2 to remove the other bearing. Good support used on the inner races will prevent bearing damage.

4C Inspection of Components

Thoroughly clean all parts. All components should be examined for wear and corrosion. Replace any parts showing visible wear.

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. Check the shaft for galling, pitting, and corrosion. Surface corrosion on the pump portion of the shaft must be removed so the seals will slide freely during assembly. The shaft diameter should be no smaller than .002” below the nominal fractional seal sizes. Remove any nicks or burrs which may have occurred during disassembly. Reclean parts as necessary.

4D Reassembly

1. Soft plastic or wooden mallet.

2. Arbor press or vise.

3. 3/4” X 6” piece of water pipe for P3, 1-1/4” X 6” for P15.

4. Internal snap ring plier.

5. Penetrating oil.

When installing or removing bearings from the shaft, the use of an arbor press is strongly recommended.

To disassemble the pedestal:

Refer to Figures 4-19 and 4-20 for reference to the numbered parts in the procedures below.

Figure 4-21

If an arbor press is not available, a bench vise may be substituted using the following instructions.

1. Remove the pedestal and close the jaws to approximately 1-1/8” for model P3 and 1-3/8” for model P15.

2. Place the shaft with either bearing resting on top of the jaws and gently tap on the end of the shaft

All parts should be visually inspected and cleaned or replaced as outlined in 4C above. It is recommended that the bearings be replaced any time the bearing pedestal is disassembled for service.

1. Using an arbor press, install the bearings on the shaft prior to installing the shaft into the pedestal.

A steel “donut” with the proper

inside diameter and outside diameter, refer to Chart 1, should be used between the arbor face plate and the lower bearing to insure proper installation and to prevent bearing damage. The bearings

Figure 4-23

must seat against the shoulder for proper alignment. Refer to Figure 4-23. *Also refer to Alternate bearing installation procedures.

CHART 1

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/Inboard 24 1 Ball Bearing/Outboard 24A 1 Coupling Guard/Halves 30 2 Capscrew 33 4

2. Place the pedestal, pump mounting surface up, in a vise or suitable

xture and insert the bearing

assembly. It should be possible to

install the shaft assembly with rm

thumb pressure. Refer to Figure 4-24. If more force is required, the butt end of a hammer handle or plastic mallet may be helpful. The shaft assembly should never be forced or driven in.

3. Install the snap ring (#4) in the pump end of the pedestal. Be sure the snap ring is seated properly in the groove. The beveled edge of the ring should face away from the bearing.

ready for pump and motor instal-

Figure 4-24

lation.

*Alternate bearing installation procedures.

If an arbor press is not available, the bearings may be installed on the

shaft using the following procedure:

This procedure is not recommended and should only be used in an emergency situation.

1. Stand a piece of 3/4” pipe for P3 or a 1-1/4” piece of pipe for P15, with the threads cut off, on a work-

bench or similar at surface, with

the bearing placed on the correct shaft end.

2. Insert the shaft into the pipe so the bearing is between the pipe and the shoulder of the shaft. Refer to Figure 4-25.

3. Using extreme caution, gently tap on the end of the shaft until the bearing rests against the shoulder. Never attempt to install the bearings by striking the outer race.

4. Repeat step 3 for the other bearing.

Section T51 • E51 Page 517

Dated February 2014

Figure 4-25

4E Testing and Final Adjustments

1. Check to be sure that the rotating assembly turns freely. Turn the shaft by hand. If it is tight or rough spots are encountered, it is likely that at least one of the bearings was damaged during disassembly/ assembly operations and will have to be replaced.

2. Look to make sure that the lip seals on the bearings are positioned properly in their grooves. Correct if necessary. As the bearings are turned, the grooves should appear wet with oil but have no visible grease present.

3. Recheck the snap ring on the large bearing end. It should be

rmly in place, and no axial motion

should result from gentle tapping on either end of the shaft. (Use a soft mallet so shaft surfaces are not damaged.)

4. No adjustments are possible or required. Proceed with the appropriate pump end assembly operations. Refer to Section 4 SERVICE - PUMP ENDS (Final testing is done after the pump end is in place.)

4. Install the inger over the snap

ring. The bearing pedestal is now

P3 & P15 BEARING PEDESTAL

24A

Figure 4-19 P3 Bearing Pedestal Figure 4-20 P15 Bearing Pedestal

24A

T51 • E51 SERIES

Troubleshooting

Section T51 • E51 Page 518

Dated February 2014

FLEXIBLE COUPLED PUMPS CLOSE COUPLED PUMPS VERTICAL FLANGE MOUNTED 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 — Conrm that pump and all inlet piping is 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 change rotation. Check motor nameplate for single phase operation.

6. Clogged suction line, strainer or 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. Insufcient 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 some-times be detected in this manner. If there is a suspicion of damage, remove the pump from service and disassemble for inspection.

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 the simpler 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.

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, suction cover, and motor bracket.

4. System head less than expected — Replace pump with higher capacity unit or add a valve or orice 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. Insufcient NPSH or too much suc-

tion 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. Specic 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

Section T51 • E51 Page 519

Dated February 2014

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 4G Testing and Final Adjustments for repositioning fasteners.

5F Pump Vibrates Or Is Noisy

1. Pump and motor are mis-aligned — Follow the installation instructions 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 become noticeably quieter as the pump 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. Disas-

semble 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 through 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 as a result of 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

conrm the correct seal orientation.

Rotating 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 shaft 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 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.

T51 • E51 SERIES

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.

6D Motors, Mechanical Seals, and Accessories

Repair or replacement service on

Section T51 • E51 Page 520

Dated February 2014

97-4623-01-588

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 manufac-

turer’s sales ofce.

T51 • E51 SERIES

7.Limited Warranty

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” (dened 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 HEREBY

There are no warranties which extend beyond the description on the face hereof.

MTH warrants that, during the “Warranty Period” (dened below), the “Product” (dened below) will not fail to meet the “Operational Specications” (dened 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 Specications” 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 Speci cations”. The term “Product” does not include any item, assembly of items, or portion of such assembly that is selected or specied by any entity other than MTH, or that MTH has identied 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 Specications” shall mean the specied dimensions, material composition, and performance parameters of a Product, as pub lished 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 Specications” 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 Specications, the Purchaser must request a Return Goods Authorization (“RGA”) in the manner specied 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 Specications, or other written specications 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 Specications”, within applicable 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 specic 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 interpreted and en-

forced only in accordance with the laws of the State of Illinois (excluding its conicts 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.

DISCLAIMED.

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MTH PUMPS E51, T51 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual