Watson-Marlow MR-Series User Manual

ATEX

Watson-Marlow MasoSine

MR-Series

Installation & Operation Manual

Revision 1.4 / August 2013

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Icons Used in this Manual

The following icons (symbols) are used to indicate specific types of information.

Good ideas to use. A reminder to do something.

Equipment use alert. Unless you follow these procedures correctly, the equipment
may be damaged.

Safety alert. Failure to follow these procedures can endanger the safety of you or
others.

Electrical hazard. Failure to follow these procedures can endanger the safety of
you or others.

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Contents

IMPORTANT SAFETY MEASURES ..................................................................................... 4

RECEIVING YOUR MASOSINE PUMP ................................................................................ 5

WARRANTY AND LIABILITY ............................................................................................... 5

INSTALLATION PROCEDURES .......................................................................................... 6

OPERATION GUIDELINES .................................................................................................. 7

WET END DISASSEMBLY ................................................................................................... 8

WET END ASSEMBLY ........................................................................................................10

POWER END DISASSEMBLY .............................................................................................11

POWER END ASSEMBLY ..................................................................................................12

SEAL SYSTEM - DISASSEMBLY AND ASSEMBLY ..........................................................14

SHIMMING FOR PROPER SHAFT LOCATION ..................................................................18

PUMP HOUSING ROTATION INSTRUCTIONS ..................................................................21

BEARING OIL LUBRICATION RECOMMENDATIONS .......................................................22

ASSEMBLY INSTRUCTIONS FOR INSTALLATION OF FRONT COVER HINGE ..............23

HOW TO USE THE REMOVEL TOOLS...............................................................................26

TORQUE SPECIFICATIONS ...............................................................................................27

MASOSINE PUMP WEIGHTS .............................................................................................27

TROUBLESHOOTING THE MASOSINE PUMP ..................................................................28

PRODUCT LINE ..................................................................................................................29

SOFTWARE MATERIAL GUIDE .........................................................................................30

SEAL OPTIONS...................................................................................................................32

CROSS SECTION AND PARTS ..........................................................................................35

INDEX OF FIGURES ...........................................................................................................49

INDEX OF TABLES .............................................................................................................49

SAFETY INSTRUCTIONS (ATEX) .......................................................................................50

OIL CHANGE .......................................................................................................................52

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Important Safety Measures

Note: It is important that this manual be read completely before attempting operation
or disassembly of the MASOSINE PUMP to ensure safety of personnel and to avoid
damage to the pump.

Be sure to give strict attention to the Installation and Operation sections of this
manual. These sections are intended to bring to the user's attention areas of bad
practice that may give rise to possible failure conditions with the equipment as
supplied.

Never place fingers, hands or other foreign objects into the MasoSine Pump during
operation as this could cause personal injury.

Never operate the MasoSine Pump with the front cover removed or loose as this
could cause fluid to spill out of the pump and could ultimately result in personal
injury.

Do not operate the MasoSine Pump without the coupling guard installed properly.
Clothing, body parts, tools or other loose items coming in contact with the
pump/drive shaft or coupling could result in severe personal injury or loss of life.

Before attempting to dismantle the MasoSine Pump, be sure that the power source
to the drive is disconnected or locked nut. Ensure that the electrical switch gear
cannot be operated while any work is being done on the pump.

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Receiving Your MasoSine Pump

NOTE: Your MasoSine Pump has been inspected at the factory prior to shipment. All pumps are
shipped ready for service, i.e. completely assembled. The bearing housings have been supplied with
oil in them.

Inspect the shipping container and pump for evidence of damage during shipment.

If damage is found:

Note the extent of the damage before unpacking the pump.

Photograph the damage, as this is very helpful in making any claims against the carrier.

A pump lost or damaged during shipment is the responsibility of the carrier. Watson-Marlow

MasoSine will assist in tracing any lost shipments.

After uncrating your MasoSine Pump:

1. Check to be sure that the suction and discharge nozzles are covered. If the nozzles protective
covers have come loose or have been removed during shipment, it is important that the pump
interior be inspected. Any debris found in the pump should be removed.

2. Check the nameplate data against the shipping papers and against your purchase order to insure
that the proper pump has been provided and that the materials of construction match your
specifications.

3. If applicable, check to see that the proper drive has been supplied, particularly with regard to the
supply voltage required.

4. Inspect the suction and discharge nozzles to be certain that they are free of scratches and that
they are clean of any foreign substances. The gasket seating surfaces should be inspected
carefully, especially for vacuum and suction lift applications.

5. Liner/seal housing removal tools have been provided to assist you with maintenance of the
MasoSine Pump. These tools (there should be two) can be found in the crating.

If there are any questions regarding receiving your pump, please contact Watson-Marlow MasoSine
at [phone]

Warranty and Liability

Basically our “General sales and delivery conditions” apply. These are available to the operator at the
latest since conclusion of the contract.
Warranty and liability claims for personal and material damage are excluded if they are attributable to
one or several of the following causes:

- Use of the machine not as intended

- Incorrect installation, operation and maintenance of the machine

- Operating the machine with defective safety devices or not correctly attached or not functioning
safety and protective devices

- Non-compliance with the instructions in the operating instructions regarding

transport,

storage,
installation,
start-up,
operation, maintenance and setting of the machine.

- Unauthorized constructional changes to the machine

- Insufficient monitoring of machine parts subject to wear

- Incorrectly performed repairs

- Cases of catastrophe due to effect of foreign bodies and acts of God.

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The Watson-Marlow MasoSine grants no warranty on this documentation as well as no implicit
warranties on commercially customary quality and suitability for a certain application.
The Watson-Marlow MasoSine undertakes no liability for errors contained in it or consequential
damage occurring by chance arising due to the design, performance and the use of this
documentation.
This publication contains own information protected by copyright. All rights are reserved.
This publication may be neither photocopied, nor duplicated nor translated without previous
agreement of Watson-Marlow MasoSine. Rights reserved to make changes in these operating
instructions.

Installation Procedures

NOTE: Before attempting to operate your MasoSine Pump, work through the following items.

1. Check the coupling alignment between the drive and the pump. This should be done only after the
pump, drive and base have been fully anchored. Refer to
with the coupling, if applicable.

Figure 1

and the alignment sheet supplied

Figure 1 – Coupling Alignment

2. Be sure that the piping loads on the suction and discharge nozzles are not excessive. Flexible
connectors on both the suction and discharge side of the pump are recommended to eliminate
pipe stress or movement

3. Check to be sure that the pump and piping are free of foreign objects.

Caution: Do not use the MasoSine Pump to flush or clean the piping system as damage to the
pump may result.

4. Be sure to check all joint and piping connections to insure that they are tight and free of air leaks.

Suction leaks can cause the pump to run inefficiently.

5. Pressure gauges on both the suction and discharge side of the pump are highly recommended.
These gauges can often identify the source of system operational problems.

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Operation Guidelines

The following guidelines are important to the proper operation of your MasoSine Pump:

1. Check to be sure that the drive shaft rotation is compatible with the desired rotation of the pump
shaft.

2. The suction and discharge nozzles on the pump housing will always remain 90° apart. However,
the pump housing can be rotated in 45° increments to suit your desired nozzle positioning and
process needs. Refer to
how to rotate the pump housing.

Figure 2

for the three positioning options and to page 22 for instructions on

Figure 2 – Nozzle Position

3. The application suction conditions determine the rotation of the pump shaft and the orientation of
the scrapergate and scrapergate guide.

NOTE: The MasoSine Pump can operate in either a clockwise or counterclockwise direction with
equal performance provided the scrapergate and scrapergate guide are installed properly. The
fluid will pass through a 270° arc that will transport it from suction to discharge. Refer to

Figure 3

and page 20 for scrapergate and scrapergate guide installation instructions.

Figure 3 - Rotation

4. Caution: Do not run the MasoSine Pump dry. Damage to the wet end parts may result. If using the
MasoSine Pump in conjunction with a variable speed drive, it is recommended to start the drive at
as low a speed as possible. Be certain that liquid is available to the suction side of the pump
before operating.

5. On suction lift applications, top suction nozzle orientation should be avoided, as it is very difficult
to remove air from the pump in this position. It is necessary to fill the pump with water or product
prior to starting the drive.

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Operation Guidelines, cont.

6. Be certain that all suction and discharge valves lines, etc. in the system are open and clear of

any clogs. This will prevent over pressurization of the pump. Warning: The MasoSine Pump is
not supplied with a relief valve and the maximum discharge pressure rating is 150 psi.
Exceeding this maximum pressure rating could result in severe personal injury.

7. The maximum MasoSine Pump operating speeds are:

MR-120 MR-125 MR-130 MR-135/MR-135RF MR-150/MR150RF

800 RPM 800 RPM 800 RPM 600 RPM 600 RPM

Warning: Exceeding the maximum speed rating for your MasoSine Pump could result in
severe personal injury or loss of life. Since some pumpages may be adversely affected by

operation at high rotor speeds, we recommend that you contact Watson-Marlow MasoSine
with pertinent application information before running at or near these speeds.

8. It is recommended that the MasoSine Pump wet end be fully disassembled for cleaning after

every use per the instructions in the Wet End Disassembly section of this manual. Sanitizing
the MasoSine Pump in a Clean-In-Place (CIP) system with a common disinfecting or rinsing
solution may not fully clean the wet end of the pump.

9. Warning: When pumping explosive, flammable or hazardous fluids, please contact the factory

for application assistance.

10. The MasoSine Pump airborne noise emissions do not exceed 70 dB(A).

Wet End Disassembly

Reference the isometric drawing below for parts identification while following the wet end disassembly
and assembly steps.

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Wet End Disassembly, cont.

1. Remove the front cover, item 400, by removing the five wing nuts, item 441, and sliding the cover
off of the front cover studs, item 450. NOTE: Do not use a screwdriver or other prying

instrument to separate the cover from the housing. Damage to the stainless steel may
result. A soft hammer can be used to separate the cover from the housing by tapping on the front

cover pins, item 420, located on the outer diameter of the front cover.

2. The front support, item 370, may now be removed from the front cover for inspection and cleaning.
If the support is stainless steel, remove the dynamic face o-ring, item 515, from the groove.

3. Remove the front liner, item 072, by pulling with even pressure on both ends. Pulling with uneven
pressure may cause the liner to become lodged in the pump housing making it difficult to remove.

NOTE: Pumping of high temperature fluids may also make the liners difficult to remove due
to thermal expansion. If the pump has been running at a high temperature, allow it to cool before

removing the liner.

4. Remove the shaft nut, item 231, from the shaft, item 200. Wrench flats have been machined on
the rear of the shaft for the purpose of securing the shaft while removing the nut. The rotor o-ring,
item 030, can now be removed from the groove in the shaft nut.

5. Next, the rotor, item 011, the scrapergate, item 125, and the scrapergate guide, item 100, can be
pulled of the shaft and removed from the pump housing. This will require two hands.

6. Remove the rear liner, item 072. This is where the liner/ seal housing removal tools will be helpful
(refer to page 26-27). Insert the hooked ends of the liner pullers into the slots located on each end
of the liner. Again, apply even pressure on both ends to prevent the liner from lodging the pump
housing.

7. The lip seal housing, item 500, may now be removed, along with the shaft sleeve, item 530. The
liner/seal housing puller tools should be used here again (refer to pages 26-27). Simply insert the
pins on the pullers into the holes in the outer diameter of the seal housing, located 180° from each
other, and use the tool to lever the seal housing out of the pump housing. Refer to page 33-35,
Seal Options, for a diagram showing your specific seal arrangement. If the seal housing is
stainless steel, remove the dynamic face o-ring, item 515, from the groove. For further
disassembly procedures for your specific seal arrangement, refer to the seal system disassembly
section of this manual.

8. Remove the shaft sleeve, item 530, from the seal housing. The rotor o-ring, item 030, can then be
removed from the groove in the shaft sleeve.

9. The seal housing o-ring, item 540, may then be removed from the groove in the pump housing.
There is a small notch in the bore of the pump housing to facilitate easy removal of the o-ring.

10. Should removal of the pump housing, item 300, be required, remove the housing mounting bolts,
item 340, and housing mounting washers, item 345, which connect the pump housing to the power
frame, item 600. Warning: Suitable lifting equipment should be used when removing the

pump housing to ensure that personal injury or damage to pump components does not
occur.

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Wet End Assembly

1. Place the pump housing, item 300, onto the power frame, item 600, by fitting the opening in the
back of the pump housing over the shaft, item 200. NOTE: Be sure that the mating flanges of the
power frame and pump housing are free of any debris or nicks, as this may cause misalignment of
the rotor. Warning: Suitable lifting equipment should be used when installing the pump housing to
ensure that personal injury or damage to pump components does not occur.

2. Install the housing mounting washers, item 345, and housing mounting bolts, item 340, through
the rear of the power frame. The bolts should be tightened evenly and to the torque specification
provided on page 28.

3. Replace the seal housing o-ring, item 540, by fitting it into the groove in the rear of the pump
housing. Apply a food grade lubricant to the o-ring before installation.

4. If the lip seal housing, item 500, is stainless steel, replace the dynamic face o-ring, item 515, by
placing it into the groove at the end of the seal housing. Apply a food grade lubricant to the o-ring
before installing. Place the seal housing into the bore in the rear of the pump housing, item 300,
such that the removal holes on the outer diameter are exposed. NOTE: Lubricating the outer
diameter of the rear of the seal housing will promote easy assembly with the seal housing o-ring,
item 540. If the seal housing is stainless steel, the anti-rotation pin in the rear of the seal housing
must be sealed properly in the slot in the rear of the pump housing. To properly seat the seal
housing, place the rotor, item 011, and the shaft nut, item 231, over the shaft, item 200. Tighten
the shaft nut to force the seal housing past the seal housing o-ring. Remove the rotor and shaft
nut from the shaft before proceeding. For further assembly procedures for your specific seal
arrangement, refer to the seal system assembly section of this manual.

5. Replace one of the rotor o-rings, item 030, by placing it into the groove on the end of the shaft
sleeve, item 530. Apply a food grade lubricant to the o-ring before installing. The shaft sleeve my
then be fitted over the shaft and into the seal housing.

6. Install one of the liners, item 072, into the pump housing being sure to fit the liner between the two
anti-rotation pins located on the internal diameter of the pump housing. Apply even pressure to
both ends to prevent the liner from becoming lodged in the pump housing.

7. Place the scrapergate, item 125, into the scrapergate guide, item 100, being sure that the marked
ends (SL and SR) match up properly. Referencing page 20 of this manual, place the scrapergate
and scrapergate guide in the desired orientation. Using both hands, this assembly can then be
placed on the rotor, item 011, such that the opening in the scrapergate and scrapergate guide fit
over the rotor vane. Install this three-piece assembly in the pump by placing the scrapergate guide
into the bore located between the suction and discharge nozzle and fitting the rotor over the
splined section of the shaft. NOTE: There is no front or back to the rotor, so it can be inserted
either way. Once the rotor meets the rotor o-ring on the shaft sleeve, apply extra pressure to
insure that the rotor is seated over the o-ring.

8. Replace the other rotor o-ring, item 030, by placing it into the groove on the end of the shaft nut,
item 231. Apply a food grade lubricant to the o-ring before installing. The shaft nut can then be
tightened onto the shaft. Wrench flats have been machined on the rear of the shaft for the purpose
of securing the shaft while tightening the shaft nut. Torque the shaft nut to the specification listed
on page 28.

9. Install the other liner, item 072, into the pump housing being sure to fit the liner between the two
anti- rotation pins located on the internal diameter of the pump housing. Apply even pressure to
both ends such that the liner does not become lodged in the pump housing.

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Wet End Disassembly, cont.

10. The front cover o-ring, item 430, can then be placed into the groove on the front of the pump
housing. Applying a food grade lubricant to the o-ring will keep it from slipping out of the groove.

11. If the front support, item 370, is stainless steel, replace the dynamic face o-ring, item 515, by
placing it into the groove at the end of the front support. Apply a food grade lubricant to the o-ring
before installing. Place the front support into the bore in the front cover, item 400, with the slots
being installed first

12. Place the front cover and front support assembly onto the front of the pump housing by lining up
the front cover studs, item 450, with the corresponding holes in the cover. Front cover pins, item
420, have been placed on the outer diameter of the front cover to facilitate this.

13. Install the five wing nuts, item 441, by hand tightening them onto the front cover studs. The wing
nuts may be further tightened with a soft-headed hammer. NOTE: If the front cover does not seat
properly against the pump housing face, remove the cover and examine the internal components
checking for proper alignment.

Power End Disassembly

Reference the isometric drawing below for parts identification while following the power end
disassembly an assembly steps.

1. Before beginning the power end disassembly, follow steps 1 through 11 in the wet end
disassembly section of this manual.

2. Drain the oil from the bearing housing, item 700, by removing the oil drain plug, item 737, located
on the bottom of the bearing housing.

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Power End Disassembly, cont.

3. Remove the bearing housing mounting cap screws, item 640, which connect the bearing housing,
item 700, to the power frame, item 600. The bearing housing may then be removed by pulling the
shaft, item 200, and bearing housing away from the power frame. NOTE: Be sure to support the

bearing housing such that the shaft will not be damaged when pulling it through the hole in
the power frame.

4. Remove the shims, item 800, which are located where the bearing housing meets the power
frame.

5. Remove the bearing housing cover cap screws, item 768, which connect the bearing housing
cover, item 761, to the bearing housing. The bearing housing cover can then be removed.

6. Using a punch and hammer or a press, remove the outboard oil seal, item 742, from the cover.
NOTE: Be careful not to damage the bearing housing cover when removing the seal.

7. Loosen the four small set screws located in the bearing locknut, item 750. The bearing locknut can
then be unscrewed and removed from the shaft.

8. Using a press, remove the shaft from the bearing housing by applying force to the key end of the
shaft. As the shaft is being forced out of the bearing housing, the rear tapered roller bearing inner
race, item 770, is being removed from the shaft. NOTE: The shaft will come free and drop out

of the bearing housing when the bearing is pressed out. Be sure to support the shaft such
that it will not be damaged.

9. Remove the inboard oil seal, item 741, by simply pulling it off of the shaft.

10. Remove the front tapered roller bearing inner race, item 770, by pressing the bearing off of the
shaft.

11. Using a punch and hammer or a press, remove the front and rear tapered roller bearing outer
races, item 770, from the bearing housing. NOTE: Be careful not to damage the internal
diameter of the bearing housing when removing the outer races.

Power End Assembly

1. Press the front and rear tapered roller bearing outer races, item 770, into the bearing housing,
item 700, being sure that the angled ends of the races face out of the housing. In the case of the
MR-150 and MR-150RF, the larger of the two outer races should be pressed into the flanged end
of the bearing housing. NOTE: Be careful not to damage the race surfaces, as this may lead to
premature bearing failure.

2. For easy bearing assembly, lock the shaft, item 200, into a vertical position with the key end of the
shaft on top. Heat one of the tapered roller bearing inner races (in the case of the MR-150 and
MR- 150RF, the larger of the two bearings), item 770, to a temperature of 250°F. Thermal
expansion of the bearing will allow it to fit into the shaft. NOTE: Do not overheat the inner race,

as this will distort the roller support. While the bearing is hot, fit it onto the shaft until it
reaches the step, with the tapered section facing upward.

3. Place the bearing housing, item 700, flanged section first, over the shaft. This will seat the front
bearing inner and outer races.

4. Heat the other tapered roller bearing inner race, item 770, to a temperature of 250°F. While the
bearing is hot, place it onto the shaft with the tapered section facing down into the bearing
housing. This will seat the back bearing inner and outer races.

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Power End Assembly, cont.

5. With the bearing still hot, tighten the bearing locknut, item 750, onto the shaft, only enough to
eliminate any float between the shaft and the bearing housing. NOTE: The holes for the set

screws must be facing upward or out of the bearing housing when the bearing locknut is
installed. While tightening the bearing locknut, rotate the bearing housing a few times to
insure that the bearings have seated properly.

6. After allowing the assembly to cool, tighten the bearing locknut until the torque required to turn the

shaft falls within the following range of your specific pump model:

MR-120 and MR-125 = 1 to 3 in lbs
MR-130 and MR-135 and MR-135RF = 6 to 8 in lbs
MR-150 and MR-150RF = 8 to 10 in lbs

This requires tightening the shaft nut, item 231, onto the shaft, item 200, and using a torque
wrench to measure the torque required to turn the shaft. NOTE: Remember, this is the torque

required to turn the shaft. The actual torque required to turn the bearing locknut is much
greater.

7. Tighten the four set screws on the bearing locknut.

8. Press the outboard oil seal, item 742, into the bearing housing cover, item 761, with the lip section
of the seal facing outward. Be sure to lubricate the inner and outer diameter of the lip seal.

9. Apply a quality gasket sealant to the mating surface of the bearing housing cover, item 761, and
the bearing housing, item 700. Fit the bearing housing cover onto the bearing housing while lining
up the holes for the bearing housing cover cap screws, item 768. Fit the bearing housing cover
cap screws into the holes and tighten to the torque specification provided on page 28.

10. Press the inboard oil seal, item 741, into the bearing housing by fitting it, lip section first, over the
wet end of the shaft. Be sure to lubricate the inner and outer diameter of the lip seal.

11. Clean the mating surfaces between the bearing housing, item 700, and the power frame, item 600,
to insure that no debris is between the parts. Fit the bearing housing onto the power frame while
lining up the holes for the bearing housing mounting cap screws, item 640. The bearing housing
must be oriented such that the drain plug, item 737, is located at the bottom. NOTE: Be sure to

support the bearing housing such that the shaft will not be damaged while fitting it through
the hole in the power frame. Fit the bearing housing mounting cap screws into the holes
and tighten to the torque specification provided on page 28.

12. Install and tighten the drain plug, item 737.

13. Remove the oil fill plug and oil level plug, items 737. Fill the bearing housing with oil until the oil is
visible through the level hole. Refer to page 23 for oil lubrication recommendations. NOTE: Fill

the bearing housing with oil only to the oil level hole, as overfilling may cause the bearings
to fail prematurely. Replace and tighten the oil fill and oil level plugs.

14. Before replacing the parts in the wet end of the pump, refer to page19 for shimming instructions.

NOTE: The bearing housing must always be shimmed when the bearings are changed or
the bearing housing is removed for the purpose of properly locating the rotor in the center
of the pump.

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Seal System - Disassembly and Assembly

A. Lip Seal

Reference the isometric drawing in
disassembly and assembly steps.

Figure 4

for parts identification while following the lip seal

506

Figure 4 – Lip Seal Disassembly / Assembly

Lip Seal Disassembly

1. Using a punch and hammer, remove the single lip seal, item 510, located in the rear of the lip seal
housing, item 506. NOTE: Be careful not to damage the inner diameter of the housing when
removing the seal.

2. Turn the seal housing upside down and press the remaining two lip seals, item 510, and the two
support rings, item 520, out of the seal housing using the press plug diameter for your specific
model listed in

3. . The lip seals should be discarded.

Table 1 – Lip Seal, Press (OUT) Plug Diameters

MR-120 = 1-3/8" or 34.9 mm
MR-125 = 1-7/8” or 47.6 mm
MR-130 = 2-3/8” or 60.3 mm
MR-135 = 2-3/4” or 69.8 mm
MR-150 = 3-1/2” or 88,9 mm

NOTE: Be careful not to damage the support rings, as these will be used again.

Lip Seal Assembly

1. Apply a food grade lubricant to the inner diameter of the lip seal housing, item 506. This should be
done to both ends of the housing.

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Seal System - Disassembly and Assembly, cont.

2. Place the seal housing in a press with the removal holes at the top of the housing. This side of the
seal housing will face into the wet end of the pump. Insert one support ring, item 520, into the seal
housing such that the flat surface of the ring rests on the step in the housing. This will not require
a press.

3. Press one of the lip seals, item 510, into the seal housing with the lip side of the seal facing out of
the housing using the press plug diameter listed in Table 2 for your specific pump model. Press
the seal in until it fits securely over the support ring.

Table 2 – Lip Seal, Press (INTO) Plug Diameters

MR-120 = 1-9/16” or 39.6 mm
MR-125 = 2-7/32” or 56.3 mm
MR-130 = 2-5/8” or 66.6 mm
MR-135 = 3” or 76.2 mm
MR-150 = 3-29/32” or 99.2 mm

NOTE: Apply even pressure to the lip seal to prevent it from lodging sideways in the housing

4. Insert the other support ring, item 520, into the seal housing such that the flat surface of the ring
rests on the lip seal. This will not require a press.

.

5. Press the second lip seal, item 510, into the seal housing with the lip side of the seal facing out of
the housing using the press plug diameter listed in Table 2 for your specific pump model. Press
the seal in until it fits securely over the support ring. NOTE: Apply even pressure to the lip seal
to prevent it from lodging sideways in the housing

6. Turn the seal housing over such that the removal holes in the housing are at the bottom. This side
of the seal housing will face the power end of the pump. Press the third lip seal, item 510, into the
seal housing with the lip side of the seal facing out of the housing. Press the lip seal in until the flat
side of the seal rests on the step in the seal housing. NOTE: Apply even pressure to the lip seal

to prevent it from lodging sideways in the housing

B. O-Ring Seal

Reference the isometric drawing in
seal disassembly and assembly steps.

Figure 5 – O-Ring Seal

for parts identification while following the o-ring

620

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Figure 5 – O-Ring Seal Disassembly / Assembly

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Seal System – Disassembly and Assembly, cont.

O-ring Seal Disassembly

1. Remove the dynamic radial o-ring, item 513, from the inner diameter of the o-ring seal housing,
item 620.

O-ring Seal Assembly

1. Replace the dynamic radial o-ring, item 513, by placing it into the groove on the inner diameter of
the o-ring seal housing, item 620. Apply a food grade lubricant to the inner diameter of the o-ring.

C. Mechanical Seal

Reference the isometric drawing in
disassembly and assembly steps.

Figure 6

for parts identification while following the mechanical seal

Figure 6 – Mechanical Disassembly / Assembly

Mechanical Seal Disassembly

1. Remove the shaft sleeve, item 531, from the mechanical seal housing, item 501. Slide the
mechanical seal, item 511, off of the shaft sleeve.

2. To remove the stationary ceramic face of the mechanical seal, item 511, place the seal housing in
a press with the removal holes at the bottom of the housing. Press the face out of the housing
using the press plug diameter listed in

Table 3

Table 3 – Mechnical, Press (OUT) Plug Diameters

for your specific pump model.

MR-120 = 1-1/2” or 38.1 mm
MR-125 = 1-3/4” or 44.4 mm
MR-130 = 2-1/8” or 53.9 mm
MR-135 = 2-1/8” or 53.9 mm

Mechanical Seal Assembly

1. Apply a food grade lubricant to the inner diameter of the mechanical seal housing, item 501.

MR-150 = 3-7/16” or 87.3 mm

2. Place the mechanical seal housing, item 501, into a press with the removal holes at the top of the
housing. Press the stationary ceramic face of the mechanical seal, item 511, into the seal housing
until it reaches the step at the rear of the housing using the press plug diameter listed in

Table 4

for

your specific pump model.

Revision 1.4 / August 2013

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