IWAKI AMERICA MDF-L Series User manual

IWAKI AMERICA
MDF-L SERIES
MAGNETIC DRIVE PUMP
INSTRUCTION MANUAL

MDF-L SERIES INSTRUCTION MANUAL
Table of Contents
1 UNPACKING AND INSPECTION ...................................................................................................................1
2 MODEL IDENTIFICATION GUIDE ...............................................................................................................2
3 SPECIFICATIONS .............................................................................................................................................3
! MATERIALS OF MAIN COMPONENTS .....................................................................................................................4
4 HANDLING INSTRUCTIONS ..........................................................................................................................5
5 INSTALLATION, PIPING, AND WIRING .....................................................................................................8
! INSTALLATION POSITION ......................................................................................................................................8
! INSTALLATION......................................................................................................................................................8
! PIPING ................................................................................................................................................................9
! SUCTION PIPING..................................................................................................................................................9
! DISCHARGE PIPING ...........................................................................................................................................11
! WIRING ..............................................................................................................................................................12
6 OPERATION .....................................................................................................................................................13
! NOTES ON OPERATION .......................................................................................................................................13
! START-UP PREPARATION ...................................................................................................................................14
! STARTING OPERATION STEPS..............................................................................................................................15
! STOPPING OPERATION STEPS .............................................................................................................................16
7 MAINTENANCE AND INSPECTION ...........................................................................................................16
! DAILY INSPECTION ...........................................................................................................................................16
! PERIODIC INSPECTION.......................................................................................................................................17
! REPLACEMENT TOLERANCE CHART ....................................................................................................................19
! CHECKING WEAR OF CONICAL THRUST BUSHING ...............................................................................................20
8 TROUBLESHOOTING ....................................................................................................................................22
9 PARTS DESCRIPTION AND EXPLODED VIEW.......................................................................................24
10 DISASSEMBLY AND ASSEMBLY OF PUMP .........................................................................................26
! DISASSEMBLY ....................................................................................................................................................26
! REPLACEMENT OF BUSHING, OUTBOARD THRUST COLLAR AND SHAFT ...............................................................28
! REASSEMBLY......................................................................................................................................................30
11 SPARE PARTS ..............................................................................................................................................32
12 DIMENSIONS AND WEIGHTS..................................................................................................................33
This product is protected by patents.
180119 Rev. H Jan 2007

1
Thank you for selecting an Iwaki America MDF-L 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 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 MDF-L
HEAD (FT.)
CAPACITY (GPM)
SERIAL NO.
HOLLISTON, MA 01746
IWAKI AMERICA
HP
60 Hz. RPM

2
2 Model Identification Guide
1 2 3 4 5
MDF-L 422 CF V X - D
Pump Size
Model Suction Discharge Motor HP Motor Frame
250 1 1 ¾ 56C
401 1 ½ 1 ½ 1 ½ 56C
422 2 1 ½ 2 145TC
423 2 1 ½ 3 182TC
425 2 1 ½ 5 184TC
Bearing System
Bearing option CF AA
Thrust collar, inboard 99.8% alumina ceramic
Thrust collar, outboard PTFE
Bushing Carbon 99.8% alumina ceramic
Thrust collar, rear
Shaft 99.8% alumina ceramic
Casing liner, containment shell 20% carbon fiber reinforced fluoroelastomer ETFE
Dry run capability (sizes
250/401/422/423/425 only) See No. 5 Yes No
1. O-ring/Gasket Material
V: Fkm (Fluoroelastomer) E: EPDM A: AFLAS T*: Teflon coated
* Special order only
2. Impeller
G: 250,401,422,423 P: 422,423,425 X: 250,422,423
5. Dry Run capability – Sizes 250, 401, 422, 423, 425 (bearing system specific)
-D: Dry run available -E: Dry run not available

3
3 Specifications
Model Connections
Suct x Disch
Impeller
Code
Max
Capacity
@60Hz
(GPM)
Max
Head
(ft)
Min Flow
rate
(GPM)
Motor
(RPM)
Motor
(HP)
G 35 55
250 1 x 1 X 45 36 3/4
401 1½ x 1½ G 70 71
2.5
1½
P 60 95
422 X 85 80 2
P 70 105
423 X 120 84
5.3
3
425
2 x 1½
P 150 135 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: ETFE type: 32 - 194°F (0 - 90° C)
Some models may be operated in a temperature of 194 - 212°F (90 - 100°C). Consult
Iwaki America or your distributor.
3. Slurry: In general, slurries should not be handled. However, a pump with a ceramic
bearing system, AA, 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.

4
! Materials of Main Components
Figure 1
Parts CF AA
1. Casing liner
2. Containment shell 20% carbon reinforced fluoroplastic ETFE
3. Bushing High density carbon 99.8% alumina ceramic
4. Shaft
5. Thrust collar, inboard 99.8% alumina ceramic
6. Impeller 20% carbon fiber reinforced fluorplastic ETFE
7. O-ring FKM/EPDM/AFLAS/Teflon
8. Gasket EPDM/FKM/AFLAS

5
4 Handling Instructions
1. Do not operate the pump dry
The sliding parts used in the MDF-L series pump 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 bushing system. A dry run monitoring device (current or power
sensor) is recommended for the prevention of damage when dry run operation is likely.
"-D" Models
Some MDF-L models in the 250, 401, 422, 423 and 425 sizes are designed to tolerate
brief or intermittent dry run operation, they are identified by a "-D" at the end of the
model number. 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.
"-E" Models
Pump models with a suffix '-E' have a similar bushing system construction to '-D'
models. However, they are not rated for dry run operation.
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.

6
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 which can
cause severe damage to the pump.
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.
4. Handling of slurry liquid
In general, slurries should not be handled. However, a pump with a ceramic bearing
system, AA or KK type, 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 MDF-L 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. 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.
PSI
(kg/cm)
2
0.4 58
43.5
0.3
.24
290.2
.16
14.50.1
Temperature Limit °F (°C)
158
(70)
194
(90)
34.8
23.2
0
MDF-L422, 423, 425
MDF-L401
MDF-L250
Figure 2
Max. Pressure rating

7
8. 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.
Liquid temperature range: ETFE type: 32 - 194° F (0 - 90°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.
Some types of pumps can be operated in the fluid temperature range of 194-212°F (90-100°C).
For details contact Iwaki America or your distributor.
9. 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.
10. 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 which is installed
close to the discharge port of the pump.

8
5 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 surface
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. (See Figure 3).
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

9
! 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
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
8
22
22
13
3
4
65
9
Fi
g
ure 4

10
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.
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.

11
! 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.

12
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.
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
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.
MC
M
OLR
MC ON
OFF
RST
POWER
PUSHBUTTON
M
TR
A
RMC
MC
R S T
POWE
R
MCB
OLR
OLR
PBS
OFF
AR
TR
ON
MCY
AR
MCY
MC
PUSH
BUTTON
TR
AR
MC
Y
UVW
XYZ
For ½ - 7½ HP motor: For 10-20 HP motor:
M
MC
ON
OFF
OLR
MOTOR
ELECTROMAGNETIC SWITCH
OVERLOAD RELAY
PUSH BUTTON
M
ON
OFF
MC
MCB
MCY
OLR
TR
AR
MOTOR
ELECTROMAGNETIC CONTACTO
R
NONFUSE BREAKER
ELECTROMAGNETIC CONTACTO
R
OVERLOAD RELAY
TIMER
AU
XILIARY RELAY
PUSH BUTTON
Figure 6

13
4. For pumps using a motor of 10 HP or larger, use of a soft start motor voltage/amperage
device is recommended.
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.)
6 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.

14
! 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 baseplate installation bolts.
Check the torque of the bolts which couple the front casing and the bracket together.
Proper torque is 32.5 ft-lbs.
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.
Note: All Iwaki America MDF-L 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.

15
! 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:
Models 250/401 2.5 GPM (9.5 LPM)
Models 422/423 5.3 GPM (20 LPM)
Model 425 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.

16
! 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, which 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.
7 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.

17
! 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.

18
Inspection
Interval Part Inspection Points Operator Action
Inner magnet assy
# Is there scoring on rear face or
cylindrical body?
# Are there any cracks in the
plastic of the rear section or
cylindrical body?
# Bushing wear.
# Contact distributor if any
abnormality is observed.
# Contact distributor if any
abnormality is observed
# Replace if abnormality is
observed. (See Tolerance
chart)
Every 3
months
Impeller
Impeller
# Are there any cracks?
# Are there any cavitation
marks?
# Stain or clogging inside
impeller?
# Dimensional change of
impeller?
# Conical thrust wear?
(250/401/422/423/425 only)
# Replace if abnormality is
observed.
# Eliminate cause.
# Clean.
# Replace if abnormality is
observed.
# Replace if abnormality is
observed. (See Tolerance
chart)
Front casing
liner
# Stain in liquid-contacting
section?
# Are there any cracks?
# Wear or crack on inboard
thrust collar?
# Expansion or wear of o-ring?
# Scoring on inner surface?
# Clean
# Replace if abnormality is
observed.
# Contact distributor if
abnormality is observed.
# Replace if part is damaged.
# Contact distributor if
abnormality is observed.
Every 3
months
Shaft # Are there any cracks?
# Wear on surface?
# Replace if abnormality is
observed.
# Replace if wear limit is
exceeded.