IWAKI AMERICA MXM Series User manual

IWAKI AMERICA
MXM SERIES
MAGNETIC DRIVE PUMP
INSTRUCTION MANUAL

MXM SERIES INSTRUCTION MANUAL
Table of Contents
1SAFETY INSTRUCTION ..................................................................................................................................1
2CAUTION............................................................................................................................................................2
3UNPACKING AND INSPECTION...................................................................................................................3
4MODEL IDENTIFICATION.............................................................................................................................4
5SPECIFICATIONS.............................................................................................................................................5
6MATERIALS OF CONSTRUCTION...............................................................................................................6
7HANDLING INSTRUCTIONS..........................................................................................................................7
8INSTALLATION, PIPING, AND WIRING...................................................................................................10
INSTALLATION POSITION ....................................................................................................................................10
INSTALLATION....................................................................................................................................................10
PIPING ..............................................................................................................................................................11
SUCTION PIPING................................................................................................................................................11
DISCHARGE PIPING ...........................................................................................................................................13
WIRING .............................................................................................................................................................14
9 OPERATION.....................................................................................................................................................15
NOTES ON OPERATION.......................................................................................................................................15
START-UP PREPARATION ...................................................................................................................................15
STARTING OPERATION STEPS..............................................................................................................................16
STOPPING OPERATION STEPS.............................................................................................................................17
10 MAINTENANCE AND INSPECTION .......................................................................................................17
DAILY INSPECTION.............................................................................................................................................17
PERIODIC INSPECTION.......................................................................................................................................18
REPLACEMENT TOLERANCE CHART ....................................................................................................................20
11 TROUBLESHOOTING................................................................................................................................21
12 PARTS DESCRIPTION AND EXPLODED VIEW...................................................................................23
13 DISASSEMBLY AND ASSEMBLY OF PUMP.........................................................................................24
DISASSEMBLY ....................................................................................................................................................24
REASSEMBLY......................................................................................................................................................28
14 SPARE PARTS..............................................................................................................................................30
15 DIMENSIONS AND WEIGHTS..................................................................................................................31
This product is protected by patents.
P/N 180334 Rev. C1 Jul 2008

1
Thank you for selecting an Iwaki America MXM Series magnetic drive pump. This instruction manual
explains the correct handling, operating, maintenance, inspection and troubleshooting procedures for your
pump. Please read through it carefully to ensure the optimum performance, safety and long service of
your pump.
1 Safety Instruction
WARNING:
1. Pay attention to the magnet field
The magnet drive pump has a pair of strong magnets. The strong magnet field could adversely affect
any persons who are assisted by electronic devices such as the pacemaker, etc.
2. Be sure to turn off power prior to any inspection/maintenance and installation works. Be careful
power is not turned on unintentionally while working on the pump. In a noisy or dark place, display
a sign of "Men Working" near the power supply switch.
3. Wear protective clothing
When arranging piping or dismantling the pump, wear protective clothing such as safety goggles,
protective gloves etc.
4. Lifting pump
When lifting the pump, apply a chain or belts to the eye bolts to keep the pump horizontal.
5. Do not remodel pump
Do not remodel the pump. Iwaki America is not responsible for any personal injury or damage to the
pump due to modifications.
6. Handling of dangerous liquids
For the transfer of the dangerous liquids mentioned below, be sure to conduct daily inspection and
maintenance for the prevention of liquid leakage or other failure. Liquid leakage may result in a
personal injury, explosion or fire.
• Explosive or flammable liquids
• Corrosive or stimulus toxic liquids
• Harmful liquids to human health
7. Preventative measure against harmful gas
When handling harmful chemical gas, provide a preventative measure such as installation of an air
fan.

2
2 Caution
1. Attention to magnetic force
Strong magnets are used in this pump. Personal injury may be caused from the strong magnetic
force. Follow the procedure on "Disassembly and Assembly of Pump" when conducting maintenance
work.
2. Do not run pump dry
Do not run pump dry. Frictional heat generated under dry run conditions can cause damage to the
pump. NEVER operate the pump with a suction side valve closed.
3. Restriction on pump operator
The pump must be handled or operated by a qualified person with a full understanding of the pump.
4. For specified application only
The use of the pump in any application other than those clearly specified may result in the failure or
damage to the pump.
5. Countermeasure against static electricity
When low electric conductivity liquid such as the ultra-pure water and the fluor inactive liquid (e.g.
Fluorinert™) are handled, static electricity may generate in the pump, which may cause a static
discharge resulting in damage to the pump. Countermeasure must be taken to remove static
electricity.
6. Air elimination prior to pumping operation
Eliminate air in the pump chamber before operating the pump. Care must be taken to eliminate air
when handling fluids which easily generate bubbles (hydrogen peroxide, sodium hypochlorite, etc.).
Any operation with air remaining in the pump chamber may cause frictional heat and result in
damage to the pump.
7. Countermeasure against efflux
Take protective measures against the accidental efflux caused by damage to the pump or piping.
Also, take an appropriate measure for preventing any spilled liquid from directly soaking into the
ground.
8. Pump disposal
A used or damaged pump must be disposed of in accordance with local laws and regulations.

3
3 Unpacking and Inspection
Open the package and check that the product conforms to your order. Also, check each of the following
points. For any problem or inconsistency, contact your distributor at once.
1. Check that the model number and the HP indicated on the nameplate conform to the specifications of
your order.
2. Check that all the accessories you ordered are included.
3. Check that the pump body and parts have not been accidentally damaged or that any bolts or nuts
have not been loosened in transit.
MODEL MXM
HEAD (FT.)
CAPACITY
(GPM)
SERIAL NO.
HOLLISTON, MA
IWAKI
HP 60 Hz. RPM

4
4 Model Identification
MXM- 54 2 1 CF V H -XX
1 2 3 4 5 6 7
1 Connection Size
Model Suction Discharge
54 2” Flange 1.5” Flange
2 Horsepower
Model HP
2 2
3 3
5 5
3 Impeller Range
Code Number Maximum Capacity Maximum Head
1 110 GPM 128 Ft
2 95 GPM 88 Ft
3 150 GPM 98 Ft
4 165 GPM 146 Ft
4 Materials of Construction
Material Code CF FF KK
Front casing liner/Rear casing
Impeller/Magnet Capsule CFRETFE
Bearing High Density
Carbon High Purity Alumina Ceramic
Spindle High Purity Alumina Ceramic
Liner Ring High Purity Alumina Ceramic
Mouth Ring PTFE
SiC
Rear Thrust Ring CFRPFA
5 O-ring/Gasket Material:
V: FKM (Fluoroelastomer E: EPDM A: AFLAS® P: Dal-el-Perfluoro®
6 H: Rear Casing with Cover
7 Special Configuration: 2 digit numeric code denoting special configuration

5
5 Specifications
Max. Min.
Connections Impeller Capacity Max. Flow Motor Motor
Suction x Discharge Code @ 60 Hz Head Rate (RPM) (HP)
Model
(GPM) (Ft.) (GPM)
2 95 88
MXM-542 3 45 98 2
1 44 128
2 95 88
3 60 98
MXM-543
4 75 125
5.5
3
1 110 128
2 95 88
3 150 98
MXM-545
2" x 1.5" Flange
4 165 146
13.2
3450
5
Notes:
1. Rated performance (head/capacity) represents the maximum discharge head/capacity measured with
water at 68°F (20°C).
2. Liquid temperature range: 14 to 221°F (-10 to 105° C)
3. Maximum Allowable Working Pressure: 101.5 PSI
3. Slurry: In general, slurries should not be handled. However, a pump with a SiC bearing system, KK,
can handle slurries if the hardness is 80Hs or below, with a maximum grain size of 2 MIL (50
microns) and maximum density 5% wt. Contact Iwaki America or your distributor for details.

6
6 Materials of Construction
Materials of Construction
N0. Item CF FF KK
1 Front Casing
2 Rear Casing
3 Impeller
4 Magnet Capsule
CFRETFE
5 Spindle High Purity Alumina Ceramic
6 Bearing High Density
Carbon
High Purity
Alumina
Ceramic
7 Liner Ring High Purity Alumina Ceramic
8 Mouth Ring PTFE with Filler
SiC
9 Rear Thrust Ring CFRPFA
10 O-ring FKM/EPDM/AFLAS®/Dal-el Perfluoro®
11 Impeller Locking Pin CFRETFE
12 Rear Casing Support FRP

7
7 Handling Instructions
1. Do not operate the pump dry
The sliding parts used in the MXM Series pumps are lubricated and cooled by the fluid being
pumped. Never operate the pump dry or with the valves on the suction side closed. Otherwise, the
inside of the pump will be damaged. If the pump is unavoidably or accidentally operated dry, with
no obvious damage, allow the pump to cool down for a minimum of one hour before attempting to
restart. Do not allow fluid to enter the pump cavity until the pump has cooled down. Sudden or rapid
cooling of the pump may cause damage to the ceramic components. A dry run monitoring device
(current or power sensor) is recommended for the prevention of damage when dry run operation is
likely.
"CF" Models
Some MXM models are designed to tolerate brief or intermittent dry run operation. They are
identified by the "CF" material code. These models can tolerate dry run conditions for up to one
hour. Longer dry run periods, or frequent dry running may result in premature wear of the bushing
and shaft. This can rapidly affect the standard clearances of the rotating elements inside the pump.
These pumps are designed to reduce the likelihood of cracking resulting from sudden cooling with
liquid immediately after dry run operation. However, to ensure that this does not occur, Iwaki
America recommends that the pump be allowed to cool for at least 20 minutes after dry running
before introducing fluid again.
2. Starting and Stopping
Pay close attention to the following points to avoid water hammer upon starting and stopping of
pump operation. Extra attention is required when the discharge piping is very long.
Starting
Prior to starting the pump, make sure that the power is turned off. Then carry out priming to fill the pump
cavity with liquid.
Next, close the valves on the discharge side. Now you can turn the power on and start up the pump. When
the pump has reached full speed and line pressure is stable, the discharge valve can be opened to the
desired pressure setting.
Caution! If the pump is operated with air remaining within the pump cavity, pitting, cracking,
or breakage of the bushing and/or thrust collar may occur, causing damage to the pump.
Stopping
When stopping the pump, first close the discharge valve gradually. When it is completely closed, turn off
the power switch so that the pump stops. Never stop the pump suddenly by quickly closing a valve (i.e.,
solenoid or hydraulic valves).
Caution! Quick valve closure may cause water hammer that can cause severe damage to the
pump.

8
MPa PSI
Figure 1
(Deg. F)
(Deg. C)
Max. Allowable Pressure
101.50.7
14 221
-10 105
Temperature Limit
3. Maximum system pressure rating
The chart above shows the maximum system pressure rating of each model. Take care that the
system pressure does not exceed the maximum pressure rating.
NOTE: Allowable liquid temperature range is 50 - 221° F (10 - 105° C) with Aflas® O-ring.
Ambient Temperature: 32 - 104° F (0 - 40° C)
Ambient Humidity: 35- 85% RH
4. Handling of slurry liquid
In general, slurries should not be handled. However, a pump with silicon carbide bearing system
(KK material code) can handle slurries if the hardness is 80 Hs or below, with a maximum grain size
of 2 MIL (50 microns) and the maximum density 5% wt. Contact Iwaki America or your distributor
for details.
5. Influence of specific gravity on pump performance
The performance of the MXM pump does not change when pumping fluids of high specific gravity.
However, the effect of specific gravity on shaft power and magnet coupling torque requirements
must be considered in the selection of the appropriate model for your application.
6. Influence of liquid viscosity on pump performance
When pumping a high viscosity liquid, the discharge head and capacity of the pump may be lower
than in the case of pure water. The required driving power may also vary and should be verified.
7. Allowable liquid viscosity with FF material code
Liquid viscosity should be 1 mPa•S (cP) or more.
8. Intermittent operation
Frequent start/stop switching shortens the service life of the pump. Limit the frequency of switching
on or off to six times or less per hour.
9. Effects of temperature
The pump itself may not suffer a change in performance due to temperature fluctuation. However,
the liquid may change in terms of viscosity, vapor pressure, and corrosive properties. Pay special
attention to changes in liquid characteristics as a result of temperature fluctuation.

9
Liquid temperature range: 14 - 221° F (-10 - 105°C)
Ambient temperature range: 32 - 104° F (0 - 40°C)
Refer to corrosion resistance tables for the recommended temperature range for various types of liquids.
In case of any questions, contact Iwaki America or your distributor to determine if operation is feasible.
NOTE: Allowable liquid temperature range is 50 - 221° F (10 - 105° C) with Aflas® O-ring.
10. Separation of magnet coupling (decoupling)
If the magnet coupling should disconnect, stop the pump immediately. If operation is continued, the
torque rating of the coupling will be permanently reduced.
11. Operation within range of bell-shaped head/capacity curve
In the case of a pump which generates a bell-shaped capacity curve in a low-flow range, do not
operate the pump in the section where the line ascends. (Refer to the standard performance curve to
verify the head/capacity). If the rightward ascending section of the head/capacity curve is part of the
pump operation specifications, design the piping by observing the following points:
1. The discharge piping should have no water tank or air trap,
2. The discharge quantity must be adjusted by a valve that is installed close to the
discharge port of the pump.

10
8 Installation, Piping, and Wiring
 Installation Position
1. Install the pump as close to the suction tank as possible (flooded suction). If the suction port of the
pump is positioned higher than the suction tank (suction lift), be sure to arrange a foot valve in the
suction pipe. The lifting capability depends upon the liquid properties, temperature, and length of
suction piping. For details, consult Iwaki America or your distributor.
2. The pump can be installed indoors or outdoors. However, there should be sufficient space around
the pump to enable efficient and easy maintenance.
 Installation
1. The pump anchoring area must be greater than the area of the pump baseplate. If the anchoring area
is not large enough, the baseplate may be damaged due to the concentration of loads placed on it.
2. Set the pump baseplate on a concrete foundation and fasten the anchor bolts tightly to prevent the
pump from vibrating during operation. A sturdy metal (or reinforced) skid or platform is also an
acceptable mounting surface.
3. Insert a spacer between the concrete suface and the bottom of the base to level the pump
horizontally. Next put a level on the discharge flange surface to adjust the pump horizontally in the
direction of the pump shaft. Also adjust the direction vertical to the pump shaft at the same time by
placing a level on the suction flange surface. Pour cement mortar into the anchor bolt holes after
leveling has been completed. When the cement mortar is hardened, fasten the anchor bolt nuts
firmly. [Fig. 2]
4. In case there is influence of motor vibration during operation (e.g. sympathetic vibration with
piping), an expansion joint should be provided between the pump and the piping before installation.
Otherwise, pipes and gauges may be damaged.
Base
Anchor bolt
Space
r
Fi
g
ure 3
Figure 2

11
 Piping
1. Discharge pipe (use a support
To keep the pump free from the
load of the pipe)
2. Gate valve
3. Check valve
4. Pressure gauge
5. Motor
6. Pump
7. Priming pump
8. Gate valve
9. Drain valve
10. Compound gauge
11. Suction pipe (shortest horizontal
section with an ascending gradient
toward the pump)
12. Pipe support
13. Pump drain
14. Suction pipe
15. Suction pipe stabilizer brace
(used if suction pipe is particularly
long)
16. Foot valve
17. 1.5D* or more
18. 18 inches or more
19. 1-1.5D* or more (if sediment Figure 3
accumulates easily)
20. Suction tank
21. Screen
22. Short pipe
* Pipe diameter
 Suction Piping
1. The suction pipe should employ the flooded suction method if possible. The shortest pipe possible,
with the minimum number of bends, should be designed. Arrange a proper support on the suction
pipe so that the load and the thermal stress of the pipe itself are not applied to the pump.
2. Attach the coupling on the suction pipe carefully, so that no air enters the line. The presence of air in
the suction pipe may prevent priming of the pump.
3. Avoid installations with poor suction conditions (e.g. vacuum in suction tank, large suction head or
long suction piping). NPSHa should always be at least 2 feet greater than NPSHr. For NPSHr
values, refer to the standard performance curve for your pump model or contact Iwaki America or
your distributor.
19
18
21
15
14
20
16
17
18
8
7
1
2
12
12
10
11
12
822
22 13
3
4
65
9

12
4. When using a bend on the suction side, install a straight pipe which is more than 20 inches long or 10
times as long as the suction port diameter before the suction port of the pump. Use the largest
possible radius of curvature for the bend.
5. Do not allow any projection where air may be trapped along the suction pipe. The suction pipe
should have an ascending gradient toward the pump.
6. If the diameters of the pump suction port and the suction pipe are different, use an eccentric reducer
pipe. Connect the eccentric reducer pipe such that the upper part of it is level. Never use a suction
pipe with a diameter smaller than that of the pump's suction port.
7. When using the flooded suction method, the suction pipe should be given a slight ascending gradient
toward the pump so that no air pocket is created on the suction side.
8. The end of the suction pipe should be located 18 inches or more below the surface of the liquid.
9. A screen should be provided at the inlet of the suction tank to prevent the entrance of foreign matter
into the suction pipe. Foreign matter may cause malfunctioning of and/or damage to the pump. The
end of the suction pipe should be a least 1- 1.5D from the bottom of the suction tank. (D=Diameter
of suction pipe).
10. When employing the suction lift method, install a foot valve on the suction pipe.
11. When using the flooded suction method, it is recommended that a gate valve be installed on the
suction pipe for easier overhaul inspection of the pump. Since this valve is used only in the overhaul
inspection of the pump, keep it fully opened during normal pump operation.
12. Pay close attention to the lowest level of the liquid in the suction tank to avoid vortexing, air
entrapment and associated suction piping concerns.
The inflow pipe into the suction tank should be distanced from the suction pipe and positioned below
the liquid surface as a means of preventing air entrainment to the suction pipe. If air bubbles are
generated in the suction tank, install a baffle.
13. It is recommended that a vacuum/pressure gauge be installed on the suction piping approximately 6
pipe diameters from the pump suction port.

13
Figure 4
 Discharge Piping
1. Use proper pipe supports so that the weight of the piping does not load the pump nozzle.
2. If a method other than flooded suction is used, install a special pipe for priming.
3. If the piping is very long, its diameter should be determined by calculating the piping resistance.
Otherwise, the specified performance may not be obtained due to increased piping resistance.
4. A check valve should be installed if any of the following conditions exists in the piping:
• The discharge piping is very long.
• The discharge head is 50 feet or more.
• The end of the discharge pipe is located 30 feet higher than the surface of the suction tank.
• Several pumps are connected in parallel with the same piping.
5. The installation of a gate valve on the discharge pipe is recommended for the adjustment of
discharge quantity and for the prevention of motor overload. When installing both a check valve and
a gate valve, the check valve should be positioned between the pump and the gate valve.
6. A pressure gauge must be installed on the discharge piping, prior to the gate valve.

14
7. An air bleeding valve should be installed if the discharge pipe is very long in the horizontal
direction.
8. A drain valve should be installed for the drainage of liquid if there is a chance that the liquid in the
discharge pipe will freeze.
 Wiring
Figure 5
Use appropriate wiring materials, follow the instruction manual for the motor and abide by the local
and national electrical codes. In addition, follow the instructions given below:
1. Use a motor contactor that conforms to the specifications (voltage, current, etc.) of the pump motor.
2. If the pump is installed outdoors, use waterproof wiring to protect the switches from rainwater and
moisture.
3. The motor contactor and push button should be installed a reasonable distance from the pump.
Refer to the wiring examples shown above. (These examples do not include the installation of a dry
run prevention device. Follow the instruction manual of the dry run prevention device when
installing it.)
MC
M
OLR
MC ON
OFF
RST
POWER
PUSHBUTTON
For ½ - 7½ HP motor:
M
MC
ON
OFF
OLR
MOTOR
ELECTROMAGNETIC SWITCH
OVERLOAD RELAY
PUSH BUTTON

15
9 Operation
 Notes on Operation
1. Never operate the pump with the suction valve (gate valve) closed. Otherwise, the internal bushing
of the pump will be damaged.
2. In the event of cavitation, stop the pump immediately.
3. If the magnet coupling disconnects, stop the pump immediately. The torque rating of the magnet
coupling will be reduced if operation is continued with the coupling disconnected.
4. Liquid temperature fluctuation should not exceed 144o F (62°C) when starting, stopping, and
operating the pump.
5. Be sure to close the discharge valve completely prior to start-up in order to prevent water hammer.
6. The pump should never be operated with the discharge valve closed for longer than one minute. A
resulting rise in temperature of liquid within the pump may cause damage.
In the event of a service power failure, turn off the power switch immediately and close the
discharge valve.
 Start-Up Preparation
When operating the pump for the first time after installation, and when restarting operation after a
long interval, prepare for operation as described below.
1. Thoroughly clean the inside of the piping and pump.
2. Tighten the union fittings or flange connecting bolts and base plate installation bolts. Check the
torque of the bolts that couple the front casing and the bracket together. Proper torque is 18 Ft-lbs
(24.5 N·m).
3. Close the cocks of any pressure or vacuum gauges to prevent damage from sudden pressure changes.
Open only when taking measurements.
4. Fully open the suction gate valve and partly open the discharge valve. Discharge valve may be
adjusted after completion of priming and start-up process.
5. Use a screwdriver to rotate the motor fan and check that the fan rotates smoothly. This also purges
any residual air from in and around the impeller.
6. If using flooded suction, measure the pressure in the suction pipe to verify that the pump is filled
with liquid.
7. Run the motor momentarily to check the direction of motor rotation. The motor should run in the
direction indicated by the arrow cast on the pump casing. If the direction is reversed, exchange two
wires of the three-phase power wires.

16
Note: All Iwaki America MXM Series pumps rotate counter-clockwise when looking at the suction
port of the pump. Naturally, from the motor fan side, this would be viewed as clockwise.
 Starting Operation Steps
Pump operation is detailed below.
Operation Step Notes
1. Verify valve position Suction valve should be fully open, discharge valve
fully closed.
2. Check that the pump is filled with liquid. If the pump is not full of liquid, fill it according to
steps 5 & 6 of “Startup Preparation.”
3. Turn motor switch ON momentarily to check
for correct direction of pump rotation
Note the arrow direction on the casing to confirm the
direction of rotation (clockwise when viewed from the
motor fan side).
Flow rate adjustment:
Once total discharge pressure is
increased to shut off pressure, open discharge
valve gradually to set discharge pressure to
desired specification.
Open valve slowly, paying attention to the motor
current draw to prevent it from being overloaded
through excessive opening of the valve.
Pump should be operated at a minimum flow rate of:
Model: MXM-542 5.3 GPM (20 LPM)
Model: MXM-543 5.3 GPM (20 LPM)
Model: MXM-545 13.5 GPM (50 LPM)
In case of automatic control, close discharge valve when starting pump and gradually open the discharge
valve thereafter.
Do not operate the pump with the discharge valve closed for more than one minute.
Points to be observed during operation:
If the pump enters continuous operation condition, check flow meter and confirm that pump
operation meets specifications.
If flow meter is unavailable, check values of discharge pressure, suction pressure and current in
relation to piping resistance.

17
 Stopping Operation Steps
Operation Step Notes
1. Close discharge valve gradually.
Caution! Do not cause sudden closure by
using solenoid valve, etc. Pump may be
damaged by water hammer.
2. Stop motor. Observe that the motor stops rotating slowly and
smoothly. If not, check inside of pump.
Points to be observed when stopping:
If pump operation is stopped in cold weather, liquid inside the pump cavity may freeze and
damage the pump. Be sure to drain liquid completely. In case of short term shut down, that does
not allow removal of liquid, use band heater to prevent liquid from freezing.
In case of service power failure, turn power switch OFF and close discharge valve.
10 Maintenance and Inspection
 Daily Inspection
1. Check that the pump operates smoothly, without generating abnormal sounds or vibration.
2. Check the level of the liquid in the suction tank, and the suction pressure.
3. Compare the discharge pressure and current measured during operation with the specifications
indicated on the motor and pump nameplates to verify normal pump load.
Note that the indicated value of the pressure gauge varies in proportion to the specific gravity of the
liquid.
Note: The valve of the pressure gauge or vacuum gauge should be opened only when measurements
are recorded. It must be closed after completion of each measurement. If the valve remains open
during operation, the gauge mechanism may be affected by abnormal pressure caused by water
hammer.
4. If a spare pump is included in the installation, keep it ready for use by operating it from time to time.

18
 Periodic Inspection
1. To ensure efficient, smooth operation of the pump, carry out periodic inspection by following the
procedure described below. Inspection records should be maintained.
2. When carrying out an overhaul inspection, handle the internal bushings and plastic components most
carefully. Since the outer drive magnet and inner magnet capsule are very powerful, handle these
components with caution. Take care not to trap hands and fingers between the magnets and metal
objects. Also avoid positioning the magnets near any electronic device that could be affected by a
strong magnetic field (i.e.. ATM cards or computer disks).
Inspection
Interval Part Inspection Points Operator Action
Every 6
months Outer magnet assembly
 Check for scoring
 Is magnet mounted normally?
Is hexagonal socket set
screw loose?
 Is inner perimeter of magnet
& motor shaft concentric?
 Contact distributor if any
abnormality is found.
 Reinstall magnet on motor
shaft and fasten hexagonal
socket set screws.
 Re-tighten or replace
hexagonal socket set screws.
Every 3
months Containment shell
 Check for scoring on inner
diameter.
 Are there any cracks in liquid-
containing section?
 Wear of thrust collar?
 Stain in containment shell?
 Contact distributor is
abnormality is observed.
 Replace if abnormality is
observed.
 Replace if abnormality is
observed
 Clean.