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Figure 4-24

Section

T51 • E51

Page 517

Dated

February 2014

P3 & P15 BEARING PEDESTAL

Figure 4-19

P3 Bearing Pedestal

Figure 4-20

P15 Bearing Pedestal

24A

Figure 4-23

Figure 4-25

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

Snap Ring/Bearing Retainer

Shaft

Flinger

Key Coupling

Ball Bearing/Inboard

Ball Bearing/Outboard

24A

Coupling Guard/Halves

Capscrew

2. Place the pedestal, pump mount-

ing surface up, in a vise or suitable

fixture and insert the bearing

assembly. It should be possible to

install the shaft assembly with firm

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 prop-

erly in the groove. The beveled

edge of the ring should face away

from the bearing.

4. Install the flinger over the snap

ring. The bearing pedestal is now

ready for pump and motor instal-

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 emer-

gency 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 flat 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 bear-

ings by striking the outer race.

4. Repeat step 3 for the other bear-

ing.

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 posi-

tioned 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

firmly 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 ap-

propriate pump end assembly

operations. Refer to Section 4

SERVICE - PUMP ENDS (Final

testing is done after the pump end

is in place.)

Содержание E51 SERIES

Страница 1: ...ction T51 E51 Page 501 Dated February 2014 97 4623 01 588 T51 E51 SERIES Pump Manual 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 ...

Страница 2: ...ose 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 Apply ing torque to the motor fan blades is not recommended If the impeller does not break loose immediately fill the pump with a process compatible fluid and try again in a few hours If this fails loosen only the pump cov er thru bolts clamping the ...

Страница 3: ... 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 fluid in the pump it can gall and lock up impellers Violent pump failure will result from contin ued operation with the inlet valve closed 1D4 Priming Regardless of whether ...

Страница 4: ... properly aligned The foundation must be a perma nent rigid installation of concrete or other material of sufficient 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 specified size can be enclosed in a pipe sleeve two to three diameters larger than the bolts ...

Страница 5: ... 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 Consid eration should be given to thermally ind...

Страница 6: ...he pump If a new pump does not oper ate properly the first thing to check for is damage from foreign material 3D Electrical It is important to be aware of and fol low the appropriate local and national electrical codes Do not make wiring alterations that can affect motor rotation without reconfirming correct rotation Select starter heaters and wiring for the maximum current the motor can use at fu...

Страница 7: ... valve necessary to maintain a vacuum in the suc tion 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 suc tion 4 A fluid chamber used on the inlet side to provide a supply of fluid to speed ...

Страница 8: ...to Figures 4 4 and 4 5 for refer ence 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 ...

Страница 9: ...s 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 n...

Страница 10: ... 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 unt...

Страница 11: ...t 125 Refer to Figure 4 12 Place the motor bracket face down on a clean flat 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 with the seat It is often a brittle material and is prone to breakage It is recommended that a new replacement seat be installed duri...

Страница 12: ...ts should be visually inspected and cleaned or replaced as outlined in 4D above 1 The seal seat 125 must be in stalled 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 flat 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 c...

Страница 13: ...impel ler wearing surface Force should not be required to install the impeller in the correct posi tion 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 fit repeat steps a and b to deter mine 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...

Страница 14: ...placed as outlined in 4E above 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 flat 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 sid...

Страница 15: ...mpeller 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 insta...

Страница 16: ...ion 4 T51 PUMP ENDS All work on the unit should be per formed 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 refer encing the numbers i...

Страница 17: ...t using the following procedure This procedure is not recommended and should only be used in an emer gency 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 flat 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 Ref...

Страница 18: ...system with fluid 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 Insufficient NPSH or too much suc tion lift Relocate pump supply tank or both to improve inlet con ditions Increase suction pressure Reduce fluid temperature Select a pump with...

Страница 19: ...t 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 posi tioned Refer to the appropriate seal diagrams and instructions to confirm the correct seal orientation Rotating elements sometimes stick in the wrong posit...

Страница 20: ...thout 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 a...

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