MTH PUMPS E51 SERIES Manual Download

Page: 13 / 20

Figure 4-13

Section

T51 • E51

Page 513

Dated

February 2014

23A

125

C15 VERTICAL FLANGE

MOUNT PUMP

Figure 4-12

C15

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

finger, slide the assembly onto

the motor shaft.

g. Push the sleeve on until it

comes in contact with the lock-

ing collar.

h. Position the collar over the

sleeve end and push the sleeve

on until the seal spring holder

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 set-

screws 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 po-

sition. 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 fit and

should slide on firmly but easily

until it stops against the 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 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 im

peller 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.

NAME/DESCRIPTION

PART

NO. QTY.

Motor Bracket

Cover/Vertical

“O” Ring/Casing

“O” Ring/Guide Rod

Impeller

Seal Rotating Element

Seal Stationary Seat

125

Drive Sleeve/Impeller Driver

Impeller Nut

Guide Rod (Qty. 4 on Stainless Steel) 18

ThruBolt (Qty. 0 on Stainless Steel)

Nut (Qty. 4 on Stainless Steel)

Key/Impeller Drive

Key/Sleeve Drive

23A

Gasket

Summary of Contents for E51 SERIES

Page 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 ...

Page 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 ...

Page 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 ...

Page 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 ...

Page 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...

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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