Pentair MYERS MSPD3 Manual

NOTE! To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible
party who maintains the system.
MODEL MSPD3/MSPD8/MSPD10
SELF-PRIMING SEWAGE
AND TRASH PUMPS
INSTALLATION AND SERVICE MANUAL
Part # 23833A568 | © 2014 Pentair Ltd. | 07/29/14

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GENERAL INFORMATION
The self-priming centrifugal pumps have a semi-open
impeller and suction flap valve. Pump is designed to
handle raw unscreened sewage, mild industrial waste
and slurries containing entrained solids. The material
of construction is a cast iron volute case and bearing
frame, ductile iron impeller and wear plate.
CALIFORNIA PROPOSITION 65 WARNING:
This product and related accessories
contain chemicals known to the State of California to
cause cancer, birth defects or other reproductive harm.
Before Operation:
Read the following instructions carefully. Reasonable
care and safe methods should be practiced for
installation and operation of pump. Check all local
codes and requirements before installation.
Attention:
This manual contains important information for the
safe use of this product. Read this manual completely
before using this product and refer to it often for
continued safe product use. Do not throw away or
lose this manual. Keep it in a safe place so that you
may refer to it often.
Unpacking Pump:
Remove pump from pallet. When unpacking unit,
check for concealed damage. Claims for damage
must be made at the receiving end through the
delivery carrier. Damage claims cannot be processed
from the factory. Check for and tighten all loose
attaching hardware. Check oil levels and lubricate
as necessary.
WARNING: Before handling these pumps and
controls, always disconnect the power first. Do not
smoke or use sparkable electrical devices or flames in
a septic (gaseous) or possible septic area.
Pump Not Operating or in Storage:
If pump is not put into service immediately, it must be
properly stored to prevent damage. Store unit in a dry,
warm location. Never store unit in the open even if it is
protected with plastic or other covering. The bearing
housing and motor will draw moisture, which may
result in pump failure after being put in operation.
While in storage, pumps with carbon ceramic seals
must have impellers manually rotated (6 to 12
revolutions) after sitting nonoperational for three
months or longer and prior to electrical start-up.
Pumps with tungsten carbide seals must have
impellers manually rotated (6 to 12 revolutions) after
sitting nonoperational for three weeks or longer and
prior to electrical start-up.
Motors:
Pump unit may be shipped without the motor for
customer to supply and mount.
Motor Types:
Pumps can be driven by drip-proof or totally enclosed
fan cooled motors. If motor is to operate in the open,
or in a dusty location, a totally enclosed fan-cooled
motor must be used. If pump is to operate in a damp
location, a motor with encapsulated winding should
be used. Motors are to be sized so that no overload
will exist in the operating range of the pump.
Note: When pump units are mounted at the factory,
the driver and pump are aligned before shipment.
During transit and handling of pump and components
misalignment may occur. Before operation the drive
alignment should be checked.
Shaft Couplings:
We recommend using Wood's flexible coupling to
prevent misalignment and noise that can be caused
by other couplings. The extra cost of the coupling is
easily saved in installation and field service that can
result from coupling problems.
V-Belt Drive:
Where V-belts are used, keep belts tight by adjusting
motor base screws. Belts should run cool. If belts
heat up it will indicate slipping. The V-belts should be
fiddlestring tight.
NOTE: Belt guards and coupling guards must be
properly installed before operating pump unit.
Electrical Starting Equipment:
If electrical starting equipment is not furnished with
pump, certain precautions must be observed in
selecting motor starter.
Type of Starter:
For three phase power a magnetic starter with 3-leg
overload protection is recommended to prevent
motor burnout that can occur from single phasing or
transformer faults on three phase systems. For single
phase motors a standard starter with 2-leg overload
protection is recommended.
Electrical:
1. For motor overload protection the magnetic
starter trip amp rating should not be more than
1.25 times the full load amps of the motor.
Myers®recommends a rating of 1.15 times the
full load amps of the motor.

3
2. Always use fused disconnect switch or circuit
breaker ahead of magnetic starter for short circuit
protection. When duplex pumps are used and are
operated from single disconnect switch, be sure
disconnect switch is large enough to withstand
the starting current of both pumps coming on at
once. This can occur after a power failure.
This is important as a blown fuse or tripped
circuit breaker can make both pumps and an
alarm system inoperative, resulting in flooding or
other damage.
Ground:
Connect a ground wire to motors, control box and
other related controls. Ground wire is to be sized to
the National Electric Code article 250-95. Ground
wire must be connected to a driven ground stake or
to a ground wire from the supply service. If a ground
stake is used, it must be driven at least 8 feet into
the ground.
Codes:
All local wiring codes must be observed, and
any exceptions to data given must be followed in
accordance with the local code. Consult the local
inspector before installation to avoid costly delays that
can occur due to rejection after job is finished.
PUMP INSTALLATION
Pump Installation Foundation:
Pump frame or base should be installed on a concrete
floor with proper shims and grout. Use hardwood
tapered shims to drive under base to level. Base
should be about 1" to 1½" off the floor. Build form
around the base and fill base inside cavity with grout.
Foundation bolts can be set in the grout or set in the
concrete floor with expansion bolts. Grout should be
made with 1 part cement and 2 parts sand. Mixture
should be fluid enough to run under base. Wood shim
blocks can be removed after grout has set and holes
filled with quick set cement.
Piping:
All piping to suction and discharge openings of pump
must be supported to remove stress from the pump
case and bearing frame.
Suction Pipe:
1. Suction pipe should be the same size as pump
opening. Do not use larger suction pipe as
priming time will be increased and velocity may
not be high enough to properly carry solids.
2. Pump should be installed as close to the liquid
being pumped as possible with a minimum of
elbows or fittings.
3. To avoid air pockets, suction pipe must be as
short and direct as possible. Suction pipe must
always slope upward to the pump from the
source of the liquid being pumped.
4. The suction pipe should be installed at a distance
equal to 1½ times the diameter of the suction
pipe from the wall of the wet well, minimum.
5. The suction pipe should be installed at a distance
equal to one half the diameter of the suction pipe
or 3" from the floor of the wet well, minimum.
6. If more than one suction pipe is to be installed
in the same wet well, a distance equal to at least
3 times the diameter of the suction pipe should
separate them, minimum.
7. Submergence of the suction pipe is critical to
efficient pump operations. Submergence may be
reduced by installing a standard pipe increaser
fitting at the end of the suction pipe. The larger
opening size will reduce the inlet velocity and
required submergence.
Vertical Suction Lift:
Vertical lift should not be more than 25 feet for
MSPD8/MSPD10 and not to more than 15 feet for
the MSPD3. This is for starting level only. After pump
primes, level can be pumped down to 26 to 27 feet
for MSPD8/MSPD10 and 18 to 20 feet for the MSPD3
if desired, but sump level must rise to the original
level for restart. All suction line joints must be airtight
as a leak in the suction pipe can cause the pump to
lose prime or not prime at all. Always check N.P.S.H.
calculations for available atmosphere pressure before
applying pump.
Discharge Lines:
If the discharge line ends at level lower than the liquid
being pumped, a siphon breaker must be installed in
the discharge line. Otherwise, siphoning action may
cause damage to the pump. The discharge line should
include a system check valve, with outside weight
or spring, to protect the pump from excessive shock
pressure and reverse rotation when pump is stopped.
Do not depend on the check valve at pump suction
to hold discharge pressure. The discharge line should
include an isolation valve, plug valve or gate valve,
to isolate the pump from the discharge line. This will
allow maintenance to be performed on the pump or
check valve without draining the discharge line.
Air Bleed Pipe:
A ¾" or 1" bleed line with ball valve or gate valve
must be installed between the pump discharge flange
and discharge check valve. The bleed line should be
installed as close to the discharge check valve as
possible, the end extending a minimum of 6" below
low water offset point in the wet well. The valve in the
bleed line is to be fully open at initial start-up of pump.
After initial start-up the valve is to be left partially open
at all times. This will allow any trapped air or gas to
be vented back to the wet well. Be sure vent line is
under water at all times. Self-priming pumps will not
compress air to any extent. Pump may not prime if the
bleed line is not used or closed and may not reprime
if pump loses prime after discharge line is full of water
and a discharge check valve is used.

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Drain Line from Pump Case:
A pipe should be installed in the lower drain tapping of
volute case and be piped back to the wet well. Install
a shutoff valve, ball valve or gate valve, in this line.
This will permit draining of pump case if necessary
to remove suction elbow/plate to clean impeller or
perform maintenance on the pump.
Electrical Connections:
Connect power lines to motor from magnetic starter.
Turn pump shaft by hand to be sure it is free before
attempting to start motor. Turn power on and off
quickly to check rotation. If motor is three phase,
interchanging any two lines to motor can reverse
rotation. If motor is single phase, consult literature
supplied with the motor for specific instructions.
Correct pump rotation is clockwise when looking at
pulley or coupling end (power end) of pump. Direction
arrow is cast on bearing housing.
Priming:
For initial prime, remove priming cap from suction inlet
casting and fill pump housing with water. Fully open
the air bleed valve in the bleed line. Replace cap,
being sure gasket is in place and that seat is clean.
Start motor and allow sufficient timing for priming.
Priming time is dependent on pump speed, impeller
diameter and vertical suction lift.
Cleaning Impeller:
If impeller gets clogged at any time, suction elbow/
plate can be removed by unscrewing four hand knobs
or nuts. Drain pump case before removing suction
elbow/plate. Tap on knobs with hammer to loosen.
Be sure O-ring gaskets are in place before replacing
suction elbow/ plate. Use grease on machined faces
to make removal easier at a later date. Tap on hand
knobs with hammer to retighten.
Adjusting Impeller Clearance:
Impeller face vanes must be within .015" of suction
wear plate for most efficient operation.
When wear plate or impeller wears, it can be
readjusted to proper clearance from the outboard
bearing end without the use of shims or disturbing the
pump case or piping. Loosen the three screws with
the jam nuts. Tighten the other three screws evenly
until the impeller just drags on the suction wear plate
when the shaft is turned by hand. Back off the three
screws and place a .015" shim under the head of the
screw. Turn screw up against the shim, then remove
shim. Repeat this operation on each of the three
pushing screws. Now retighten the three screws with
jam nuts, pushing the housing up against the three
adjusting screws. Retighten the jam nuts and pump
is ready to operate with the impeller face .015" from
suction wear plate.
This clearance should be checked at least once a year
and more often if water containing abrasives is being
pumped. When impeller face wear exceeds 1/8",
the impeller, wear plate and volute lip plate should
be replaced.
WARNING: Before handling these pumps and
controls, always disconnect the power first. Do not
smoke or use sparkable electric devices or flames in
a septic (gaseous) or possible septic area. Be sure all
V-belt guards or coupling guards are in place before
operating unit.
PUMP LUBRICATING
Shaft Seals:
All Myers self-priming sewage pumps use two shaft
seals with an oil chamber between the seals. The oil in
the seal chamber should be checked every six months
or every three months if water containing abrasives
is being pumped. Remove hex head plug from top of
seal chamber and loosen hex plug at bottom of seal
chamber. Place a container under the lower plug,
then remove lower plug and allow oil to drain into
container. After all oil is removed, pour used oil into a
glass container so that it can be observed. If the oil is
clean it will indicate seals are in good condition. If a
small amount of water shows in the oil, this will also
indicate satisfactory seal operation. If considerable
water and some dirt shows in the oil , it will indicate
the inboard seal is worn and should be replaced
before outboard seal is damaged. If seals are in good
order, refill the seal chamber with #30 nondetergent
automotive oil. About 2½ quarts are required for the
MSPD8/MSPD10 and about 1 quart for the MSPD3.
Fill with funnel or tube so that the air can escape.
Oil chamber must have a 1" air gap; do not overfill
oil chamber.
Pump Bearings Grease Lubricated:
Bearings should be lubricated every six months or
more often if pump is operated 24 hours a day. Do
not overgrease bearings as heat will build up that
can damage the bearings. Bearing housing is fitted
with grease gun pressure fittings at both bearing
locations and grease relief fittings. Add grease until
a small amount comes from relief fitting. The same
basic instructions apply to lubricating motor bearings,
but consult motor manufacturer's data on lubricating
bearings. Use high quality ball bearing grease or high
temperature grease. Bearings can run quite hot to
the hand without damage to the bearing. Outside
temperature of the housing should not exceed 130°F
for long bearing life.
PUMP MAINTENANCE
Replacing Impeller and Volute Lip Plate:
Disconnect power from the motor before attempting
to work on pump. Drain pump volute case and oil
from seal chamber. Remove suction elbow/plate with
wear plate attached. Clean any trash out of pump
volute, clean all machined surfaces, and wipe all ports

5
clean. The following pertains to the 3" MSPD pumps.
Remove stainless steel socket head impeller screw
that locks impeller to the shaft. This screw has a
right-hand thread. Remove impeller lock washer with
pin. Block impeller vane with a piece of hardwood
and unscrew impeller by turning pump shaft
counterclockwise. Impeller shaft has a right-hand
thread. Use large crescent wrench or strap wrench on
shaft, pulling against the key. A pipe wrench can be
used if care is used not to damage shaft. It may be
necessary to tap on impeller vanes with hammer to
break impeller loose, especially if pump has been in
service for a long period of time.
If impeller is held to the shaft with a taper fit, remove
the stainless steel nut on the end of shaft, then
remove washer. A taper fit shaft can be identified by
the key that drives the impeller. To remove impeller,
loosen three holding screws at outboard bearing
cap and tighten up on back-off screws. This will pull
the impeller loose from the shaft. After impeller is
removed, retighten screws to bring bearing cap back
to original position. It will be necessary to readjust the
impeller clearance after impeller is reinstalled.
After impeller is removed, unscrew three or four
stainless steel socket head screws that hold volute
lip plate in place. Tap on plate to loosen and remove
through volute case inlet opening. The inboard seal
now can be removed for inspection by sliding sleeve
from pump shaft. If faces are worn, the seal should
be replaced.
See seal replacement instructions. Clean pump
casing thoroughly, removing any rust or dirt from
all machined surfaces. Install lip plate with lip in the
one o'clock position. Use a pipe compound on all
machined faces.
The following pertains to the 3" MSPD pumps. Use
Permatex®on the three stainless steel screws that
hold volute lip plate in place. Reinstall the lip plate
and tighten the screws. Install seal on shaft and place
seal spring in place. Block impeller vane with a piece
of hardwood and screw impeller on by turning pump
shaft clockwise. Use large crescent wrench or strap
wrench on shaft, pulling against key to retighten.
A pipe wrench can be used if care is used not to
damage shaft. Replace impeller lock washer with pin
and stainless lock screw.
All 8" and 10" MSPD pumps use a taper fit impeller
shaft. Use Permatex®on the four stainless steel
screws that hold volute lip plate in place. Reinstall
the lip plate and tighten the screws. Install seal on
shaft and place seal spring in place, then install
key and impeller. Caution must be taken to be sure
impeller is seated on the shaft and not on the key.
Replace impeller lock washer and stainless lock bolt.
Replace suction elbow/plate with wear plate attached.
Check impeller clearance, and adjust if necessary
as described under adjusting instructions. Refill seal
chamber as described under lubricating instructions.
Replacing Inboard Seal:
Use all steps outlined under impeller removal. Slide
seal and shaft sleeve from shaft. It may be necessary
to tap on sleeve with plastic hammer to loosen. After
rotating part of seal is removed, use wire hook and
pull stationary seal seat from casting. Wipe seal
pocket clean, then install new stationary seat. Use
grease on rubber cap and push in place with fingers,
then wipe the seal face clean. Place new rotating
seal part on sleeve and push sleeve onto shaft. Be
sure O-ring gasket is in place at end of stainless steel
shaft sleeve.
Reinstall volute lip plate, put seal spring in place and
install impeller. Install impeller washer, impeller lock
screw or nut, and suction elbow/plate. Check impeller
clearance, and adjust if necessary as described under
adjusting instructions. Refill seal chamber with #30
nondetergent automotive oil.
Replacing Both Inboard and Outboard Seals:
When it is necessary to replace both seals, which will
be indicated by water leaking from the seal chamber,
it is recommended that the complete rotating
assembly be removed so that it can be worked on
more easily.
Drain pump and seal chamber as described above.
Then loosen or remove the pump coupling or remove
V-belt components, if belt driven. Remove motor bolts
and move motor to one side. Remove bolts in bearing
bracket support foot and remove six nuts from
studs in seal housing. Tap on housing with hammer
to loosen, then pull complete assembly from case.
Remove impeller and lip plate; see Replacing Impeller
and Volute Lip Plate. Remove inboard seal by sliding
sleeve from shaft. Use two screws in tapped holes
of seal plate and pry out plate with pinch bar under
heads of pull bolts. Remove snap ring from shaft
and pull outboard rotating assembly from shaft. Use
wire hooks to pull ceramic stationary seal seat from
housing. It may be necessary to break the ceramic
seal ring. Ceramic ring can be easily broken by
tapping with screwdriver. Ring is broken only if worn
and needs to be replaced.
Wipe housing clean and replace ceramic stationary
ring. Use grease on rubber cap to push into housing.
Push in stationary seal seat with fingers only, then
wipe the seal face clean. Push new rotating seal part
onto shaft. Replace seal spring and holding washer,
then install snap ring.
Replace seal plate. Be sure O-ring is in place and that
flat rubber gasket is in place on backside of seal plate.
Use grease on O-ring and push plate into position in
seal housing. Replace the three socket head stainless
steel screws. Use Permatex®on bolt threads. Replace
new inboard stationary seal face. Now replace rotating
seal part mounted on shaft sleeve. Replace volute
lip plate with the three or four socket head stainless
screws. Use Permatex®on screw threads. Install
seal spring and then screw impeller onto shaft. Lock
impeller on with washer and stainless steel socket

6
head screw. If shaft has a taper fit, be sure key is in
place and in notch of shaft sleeve. Unit is now ready
to reinstall in casing. Use NEVER SEEZ®on machine
faces and be sure case O-ring is in place on flange.
Replace nuts and bearing bracket support foot. Reset
motor and connect coupling or reinstall belts if unit is
belt driven. Refill seal chamber with #30 nondetergent
automotive grade oil. Replace top fill plugs.
Replacing Shaft Bearings:
Both inboard and outboard shaft bearings are single
row type and are the same size for any given pump.
Greased lubricated bearings are single shield.
To replace bearings, remove the impeller, seal plate
and seals as described previously. Remove holding
screws from outboard bearing cap and pull shaft and
bearing assembly from housing. It may be necessary
to tap on end of shaft with plastic or rubber hammer
to loosen shaft bearings from housing. After shaft is
removed, take snap ring off end bearing cap and push
shaft and bearing from housing.
Use Arbor press to press bearings from shaft. Always
support or press on inner race of bearing. Never press
on outer race as this can damage the bearing. Be sure
housing and all parts are thoroughly cleaned before
installing new bearings. Use care in pushing shaft
through lip seals that seal shaft in bearing housing
and bearing cap. Clean all old grease from housing
and cap and pack bearing level full with grease before
reinstalling. Do not add any extra grease to housing
after assembly, as this grease pack is sufficient for at
least six months usage. After shaft is reassembled,
install seals and impeller and adjust clearance of
impellers as described previously.
PUMP TROUBLESHOOTING
WARNING: Before handling these pumps and
controls, always disconnect the power first. Do not
smoke or use sparkable electrical devices or flames in
a septic (gaseous) or possible septic area. Be sure all
belt guards and exposed coupling guards are in place
before operating unit.
WARNING: If pump has overheated, allow pump to
cool before servicing. Do not remove plates, cover,
gauges or fittings from an overheated pump. Liquid
inside the pump case can reach the boiling point,
and vapor pressure within the pump case may cause
parts to be ejected with great force. Drain pump case
only after pump has been allowed to cool. Use care to
prevent personnel from touching the hot liquid.
Pump will not prime:
1. Pump discharge does not have air bleed line
installed. See pump installation instructions for
air bleed line.
2. Vertical suction lift is too high. Vertical lift for
priming should not be more than 20 feet for
MSPD8/MSPD10 and 15 feet for MSPD3.
3. Allow sufficient time for priming. On high lifts
and at low pump speeds priming time may take
5 minutes or longer.
4. Suction line has an air leak. Install a vacuum
gauge at pump suction flange and start pump.
After a vacuum is established, stop pump and
see if gauge holds. If gauge hand drops, it will
indicate an air leak at some connection below the
gauge tap.
5. Check pump rotation. Pump must turn clockwise
when looking at the power end of pump.
6. Not enough liquid in pump casing; add water to
the case. Pump needs water in the pump case
to prime.
7. Suction check valve damaged or contaminated;
replace check valve.
8. Leaking or worn seal or pump gasket; check
pump case vacuum, replace leaking or worn
seals or gaskets.
Pump primed OK initially but occasionally loses
prime and will not reprime without adding water:
IMPORTANT: Drain pump case and close discharge
gate valve before removing the inspection cover.
1. Air bleed line is not installed properly as specified
or is plugged. See installation instructions.
2. Check priming port for plugging. Remove
inspection cover on right side of case when
facing power end of pump. Check priming port
hole in case below inspection plate for plugging.
3. Impeller may be worn, leaving too much
clearance between impeller face and suction
wear plate. Adjust impeller as described under
adjusting instructions. If impeller and volute lip
plate are worn, they must be replaced to regain
original priming efficiency.
Pump makes a loud crackling noise when
operating:
1. If pump has been operating satisfactorily and this
noise suddenly starts, it may indicate that some
large object is lodged in the suction check valve,
suction elbow/plate or impeller causing the pump
to be noisy. Remove debris from these areas of
the pump.
2. If noise exists when suction pipe, check valve
and suction elbow are clear, it may indicate
too high of capacity being delivered for a given
suction lift, causing suction cavitation. If pump
is allowed to operate under these conditions,
the impeller will be damaged. Using a smaller
impeller or reducing the pump speed if a belt
drive is used may alleviate the cavitation. Consult
factory for recommendations.

7
3. If cracking noise is pronounced when pump is
operating at low capacity it may indicate pump is
operating too near the shut-off head. Increasing
the impeller diameter or increasing pump speed
may alleviate this condition. Consult factory
for recommendations.
4. Performance curves show maximum/minimum
capacity that the pump will deliver at a given
condition point and the allowable suction lift
without cavitation. Use vacuum gauge at pump
suction to check total suction lift when pump
is operating. Use discharge pressure gauge at
pump discharge to check discharge head. Total
the two-gauge readings to determine the total
dynamic head the pump must operate against.
5. Entrained air may be present and is being
pumped. Find source of air and eliminate.
6. Pump or drive not securely mounted. Retighten
all components.
Pump does not deliver rated capacity:
1. Total head may be higher than calculated. Pump
capacity is based on total head. Total dynamic
head is arrived at by adding the suction gauge
reading, in feet, to the discharge gauge reading,
in feet. These readings should be taken at the
suction flange and at the pump discharge flange
connections. Reading should be taken as close
to the flange fittings and pump case as possible.
To convert psi, pressure per square inch, to feet,
multiply the total psi readings by 2.31. This will
equal total dynamic head in feet.
2. Pump impeller may be worn on the vane faces
or the clearance between the impeller and wear
plate may be greater than .015". Adjust impeller
to wear plate clearances for proper clearance
as described under adjusting instructions. If
impeller, suction wear plate and volute lip plate
are badly worn, they must be replaced.
3. Pump speed may be too slow. Check drive
assembly, V-belts or coupling, for slippage.
4. Possible air leak in the suction piping; eliminate
the leak.
5. Suction head may be too high. Reduce lift by
raising on/off levels in the wet well or reduce
friction losses due to suction piping arrangement.
6. Suction line not submerged at proper levels;
correct suction pipe submergence.
7. Blockage in the suction pipe or discharge pipe;
remove blockage. Where the blockage is can be
determined by gauge readings.
8. Impeller clogged; remove debris.
Motor starter overload trips after pump has
operated for a short period:
1 . Rags or trash may be caught in the impeller,
causing extra load. Remove suction elbow/plate
and clean impeller. Pump shaft must turn freely
by hand after cleaning impeller.
2. Overload heater may be too small. Check
heater size with full load amps of motor. See an
electrical table for proper size.
3. Total head may be lower than calculated,
causing extra load on the motor. Reducing
impeller diameter or reducing speed if belt
driven, will lower motor load. Consult factory for
recommendations.
4. Pump may be pumping a liquid heavier than
water or a liquid with higher viscosity than water,
such as heavy oil. Consult factory for power
required to pump oils or liquids other than water.
5. Bearings may be damaged, causing excessive
motor load.
6. Pump speed may be too high. Check drive
output to see if they are sized properly.
Pump clogs frequently:
1. Liquid solution being pumped is too thick; dilute
if possible.
2. Discharge velocity too slow. Open discharge
valves to fully open and increase pump speed.
Bearing running too hot:
1. Drive misaligned; realign drive.
2. Low or incorrect lubricant; use proper type and
level of lubricant.
3. Suction and/or discharge pipe not supported
properly. Check piping installation for proper
support and take strain off the pump case and
bearing frame.

8
MSPD3 PARTS LIST
Item
Eng.
No.
Part
Description Qty.
1 020500002 Dis. Flange (3"– 4") 1
2 001200011 Pipe Plug 3
3 072870551 Pipe Nipple (3" x 3") 1
4 010680002 Inspection Cover 1
5 002410071 O-ring SC 1
6 010850011 Nut 18
7 010790031 Stud 2
8 010570002 Volute 1
9 010270021 Stud 2
10 134840001 Sleeve 2
11 120130001 Flap Valve Front Gasket SC 1
12 000790071 O-ring SC 1
13* 010750012 Weight 1
14 024070021 Gasket, 4" 1
15 020490002 Suction Flange 4" 1
16 009050022 Handle – Plate Clamp 2
18 120110105 Flap Valve Assy 1
19 120090003 Priming Cover 1
20 119990002 Flap Valve Housing 1
21 001190011 Pipe Plug 3
22 120150001 Cover Gasket SC 1
23 052190001 Grease Fitting Cover 2
24 517280005 Flap Valve Box Assy 1
25 010830051 Bolt 3
26 010300081 Stud 2
27 011240031 Nut 2
28 001770111 Lockwasher 2
29 010770002 Suction Flange 1
30 010790021 Stud 10
31 001770091 Lockwasher 15
32* 101560591 Flat Washer 1
33 002410041 O-ring SC 1
34 010590022 Inlet Elbow 1
35 020040002 Lip Plate (8-13/32" Imp Dia) I 1
012110022 Lip Plate (7-3/4" Imp Dia) I 1
012110052 Lip Plate (7-1/2" Imp Dia) I 1
013200012 Lip Plate (7" Imp Dia) I 1
013200022 Lip Plate (6-1/2" Imp Dia) I 1
36 010610002 Impeller 8-13/32" Dia I 1
010610082 Impeller 7-3/4" Dia I 1
010610122 Impeller 7-1/2" Dia I 1
011720032 Impeller 7" Dia I 1
011720042 Impeller 6-1/2" Dia I 1
37 010600002 Wear Plate 1
38 025830011 Pipe Plug 1
39 001780011 Cap Screw 3
40 005680021 Impeller Bolt I 1
41 010390001 Impeller Washer w/Pin I 1
Item
Eng.
No.
Part
Description Qty.
42 002380081 Bolt 2
43 001560481 Washer 2
44 010240011 Stud 4
45 009050002 Handle – Plate Clamp 4
46 010370021 Stat-O-Seal 3/8" SC 2
47 001500231 O-ring SC 2
48 005170051 Setscrew (6-1/4" - 7-1/8" Imp) I 3
011300071 Setscrew (7-5/32" – 8-13/32" Imp) I 3
49 011330011 Gasket SC 3
50* 131230021 Screw 1
51* 001140021 Hex Nut 1
52 016640011 Pipe Plug 2
53 002390031 Bolt 4
54 015090021 Sleeve SC 1
55 009750031 Snap Ring 1
56 013450001 Relief Fitting 2
57 010900011 Lip Seal SC 2
58 009740021 Snap Ring 1
59 010650013 Support Foot 1
61 001770101 Lockwasher 2
62 010830021 Bolt 3
63 009750041 Snap Ring 1
64 041300003 Shaft 1
65 000650071 Bearing 2
66 062050001 Grease Fitting 1
67 001500131 O-ring SC 1
68 010660002 Bearing Cap 1
69 010640002 Bearing Housing 1
70 052180001 Grease Fitting Straight 1
71 009200011 Seal (Ceramic) Std S 2
009200041 Seal (Carbide) Opt SC 1
72 010630002 Seal Housing 1
73 009010002 Seal Plate 1
74 001500191 O-ring SC 1
75 045800011 Drive Screw 4
76* 120110001 Flap Bracket 1
77 009050012 Handle – Plate Clamp 1
78 010700002 Clamp Arm 1
79 064620005 Pipe Nipple/Cplg 1
80 015950011 Flange, 3" 1
81 010790091 Stud SC 4
517000387 Seal Kit 1
517003387 Carbide Seal Kit 1
013420002 Suction Flange 3" 1
024070011 Gasket, 3" 1
Notes: S – Parts in Seal Kit, C – Parts in Carbide Seal Kit,
I – Parts in Impeller Kit, R – Parts in Rebuild Kit, *Consult Factory

9
76
60
51
50
32
17
11
13
24
17
32
13
50
10
76
51
60
76
12
11
MSPD3 PARTS

10
MSPD8 PARTS LIST
Item
Eng.
No.
Part
Description Qty.
1 001180011 Pipe Plug 2
2 001190011 Pipe Plug 1
3 001780021 Setscrew 4
4 023680011 Hex Head Screw 8
5 001770121 Lockwasher 8
6 023240021 Stud 2
7 002390081 Hex Head Screw 4
8 080970010 Cover 1
9 104320001 Gasket SC 1
10 104330002 Flap Valve 1
11 104340001 Flap Gasket SC 1
12 080980001 Gasket SC 1
13 009050022 Handle – Plate Clamp 2
14 010270091 Stud 2
15 001010211 Capscrew 2
16 105470002 Suction Body 1
17 023240021 Stud 4
18 040060095 Weight Hinge Assy 1
19 001760051 Hex Head Screw 2
20 104360003 Weight 1
21 002410231 O-ring SC 1
22 009050042 Handle – Plate Clamp 4
23 001560491 Washer 4
24 104370002 Suction Elbow 1
25 002410151 O-ring SC 1
26 104430002 Suction Pipe 1
27 002410221 O-ring SC 1
28 001200041 Pipe Plug 1
29 002390071 Hex Head Screw 4
30 001770181 Lockwasher 4
31 104440002 Wear Plate 1
32 002410221 O-ring SC 1
33 023240101 Stud 2
34 105840011 Washer I 1
35 105250081 Cap Screw 1
36 104390002 Seal Plate 1
37 001770121 Lockwasher 8
38 023680011 Hex Nut 8
39 023240021 Stud 8
40 016640011 Pipe Plug 2
41 009750101 Snap Ring 1
42 001770111 Lockwasher 4
43 011240031 Hex Nut 4
44 010300021 Stud 4
45 010900031 Grease Seal SC 1
46 013450001 Relief Fitting 1
47 009750111 Snap Ring 1
48 071670031 Bearing 1
49 009740041 Snap Ring 1
Item
Eng.
No.
Part
Description Qty.
50 009750081 Snap Ring 1
51 104380002 Foot Support 2
52 001770111 Lockwasher 2
53 005700051 Hex Head Screw 2
54 005700101 Hex Head Screw 3
55 013450001 Relief Fitting 1
56 010900021 Grease Seal SC 1
57 019421115 Shaft w/Stud 1
58 062050001 Grease Fitting 1
59 005700101 Hex Head Screw 3
60 011240031 Hex Nut 3
61 019400002 Bearing Retainer 1
62 000650121 Bearing 1
63 001500181 O-ring SC 1
64 023680021 Hex Nut 1
65 052190001 Cap-Grease Fitting 2
66 019390012 Bearing Bracket 1
67 052180001 Grease Fitting 1
68 037180001 Shaft Seal SC 2
69 023100023 Shaft Sleeve SC 1
70 000790101 O-ring SC 1
71 037180011 Seal, Carbide (Optional) C 1
72 019380022 Seal Plate 1
73 028550011 Key I 1
74 005560061 Allen Head Screw 3
75 011330021 Gasket SC 3
76 002410161 O-ring SC 1
77 001010261 Capscrew 4
78 029220011 Stat-O-Seal SC 4
79 006280371 Shim 1
80 045800011 Drivescrew 4
81 104310002 Volute 1
82 001190011 Pipe Plug 1
83 023680021 Hex Nut 1
84 005890061 Lifting Eye 2
85 104270002 Impeller, 15" Dia I 1
104270011 Impeller, 14-1/2" Dia I 1
104270022 Impeller, 14" Dia I 1
104270032 Impeller, 13-1/2" Dia I 1
104270042 Impeller, 13" Dia I 1
86 109170003 Back Plate, Imp Dia 14-1 /2" & 15" I 1
104490002 Lip Plate, Imp Dia 14" I 1
104490012 Lip Plate, Imp Dia 13-1/2" I 1
104490022 Lip Plate, Imp Dia 13" I 1
517000317 Seal Kit 1
517003317 Carbide Seal Kit 1
Notes: S – Parts in Seal Kit, C – Parts in Carbide Seal Kit,
I – Parts in Impeller Kit, R – Parts in Rebuild Kit

11
22
23
MSPD8 PARTS

12
MSPD10 PARTS LIST
Item
Eng.
No.
Part
Description Qty.
1 001180011 Pipe Plug 2
2 001190011 Pipe Plug 1
3 001780021 Setscrew 4
4 023680011 Hex Head Screw 8
5 001770121 Lockwasher 8
6 023240021 Stud 4
7 002390081 Hex Head Screw 4
8 080970010 Cover 1
9 104320001 Gasket SC 1
10 104330002 Flap Valve 1
11 104340001 Flap Gasket SC 1
12 080980001 Gasket SC 1
13 009050022 Handle – Plate Clamp 2
14 010270091 Stud 2
15 001010211 Capscrew 2
16 105470002 Suction Body 1
17 023240021 Stud 4
18 040060095 Weight Hinge Assy 1
19 001760051 Hex Head Screw 2
20 104360003 Weight 1
21 002410231 O-ring SC 1
22 009050042 Handle – Plate Clamp 4
23 001560491 Washer 4
24 104370002 Suction Elbow 1
25 002410151 O-ring SC 1
26 104430002 Suction Pipe 1
27 002410221 O-ring SC 1
28 001200041 Pipe Plug 1
29 002390071 Hex Head Screw 4
30 001770181 Lockwasher 4
31 104440002 Wear Plate 1
32 002410221 O-ring SC 1
33 023240101 Stud 2
34 105840011 Washer I 1
35 105250081 Cap Screw 1
36 104390002 Seal Plate 1
37 001770121 Lockwasher 8
38 023680011 Hex Nut 8
39 023240021 Stud 8
40 016640011 Pipe Plug 2
41 009750101 Snap Ring 1
42 001770111 Lockwasher 4
43 011240031 Hex Nut 4
44 010300021 Stud 4
45 010900031 Grease Seal SC 1
46 013450001 Relief Fitting 1
Item
Eng.
No.
Part
Description Qty.
47 009750111 Snap Ring 1
48 071670031 Bearing 1
49 009740041 Snap Ring 1
50 009750081 Snap Ring 1
51 104380002 Foot Support 2
52 001770111 Lockwasher 2
53 005700051 Hex Head Screw 2
54 005700101 Hex Head Screw 3
55 013450001 Relief Fitting 1
56 010900021 Grease Seal SC 1
57 019421115 Shaft w/Stud 1
58 062050001 Grease Fitting 1
59 005700101 Hex Head Screw 3
60 011240031 Hex Nut 3
61 019400002 Bearing Retainer 1
62 000650121 Bearing 1
63 001500181 O-ring SC 1
64 023680021 Hex Nut 1
65 052190001 Cap-Grease Fitting 2
66 019390012 Bearing Bracket 1
67 052180001 Grease Fitting 1
68 037180001 Shaft Seal SC 2
69 023100023 Shaft Sleeve SC 1
70 000790101 O-ring SC 1
71 037180011 Seal, Carbide (Optional) C 1
72 019380022 Seal Plate 1
73 028550011 Key I 1
74 005560061 Allen Head Screw 3
75 011330021 Gasket SC 3
76 002410161 O-ring SC 1
77 001010261 Capscrew 4
78 029220011 Stat-O-Seal SC 4
79 006280371 Shim 1
80 045800011 Drivescrew 4
81 104310002 Volute 1
82 001190011 Pipe Plug 1
83 023680021 Hex Nut 1
84 005890061 Lifting Eye 2
85 104270002 Impeller, 15" Dia I 1
104270011 Impeller, 14-1/2" Dia I 1
104270022 Impeller, 14" Dia I 1
104270032 Impeller, 13-1/2" Dia I 1
104270042 Impeller, 13" Dia I 1
86 109170003 Back Plate, Imp Dia 14-1 /2" & 15" I 1
104490002 Lip Plate, Imp Dia 14" I 1
104490012 Lip Plate, Imp Dia 13-1/2" I 1
104490022 Lip Plate, Imp Dia 13" I 1
517000317 Seal Kit 1
517003317 Carbide Seal Kit 1
Notes: S – Parts in Seal Kit, C – Parts in Carbide Seal Kit,
I – Parts in Impeller Kit, R – Parts in Rebuild Kit

13
23
22
MSPD10 PARTS

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Warranty Rev. 12/13
STANDARD LIMITED WARRANTY
Pentair Myers® warrants its products against defects in material and workmanship for a period of 12 months from the
date of shipment from Pentair Myers or 18 months from the manufacturing date, whichever occurs first – provided
that such products are used in compliance with the requirements of the Pentair Myers catalog and technical manuals
for use in pumping raw sewage, municipal wastewater or similar, abrasive-free, noncorrosive liquids.
During the warranty period and subject to the conditions set forth, Pentair Myers, at its discretion, will repair or
replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers reserves the
right to change or improve its products or any portions thereof without being obligated to provide such a change or
improvement for prior sold and/or shipped units.
Start-up reports and electrical schematics may be required to support warranty claims. Submit at the time of start-
up through the Pentair Myers website: http://forms.pentairliterature.com/startupform/startupform.asp?type=m.
Warranty is effective only if Pentair Myers authorized control panels are used. All seal fail and heat sensing devices
must be hooked up, functional and monitored or this warranty will be void. Pentair Myers will cover only the lower
seal and labor thereof for all dual seal pumps. Under no circumstance will Pentair Myers be responsible for the cost
of field labor, travel expenses, rented equipment, removal/reinstallation costs or freight expenses to and from the
factory or an authorized Pentair Myers service facility.
This limited warranty will not apply: (a) to defects or malfunctions resulting from failure to properly install, operate or
maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident
or negligence; (c) to normal maintenance services and parts used in connection with such service; (d) to units that
are not installed in accordance with applicable local codes, ordinances and good trade practices; (e) if the unit is
moved from its original installation location; (f) if unit is used for purposes other than for what it is designed and
manufactured; (g) to any unit that has been repaired or altered by anyone other than Pentair Myers or an authorized
Pentair Myers service provider; (h) to any unit that has been repaired using non factory specified/OEM parts.
Warranty Exclusions: PENTAIR MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND
THE DESCRIPTION ON THE FACE HEREOF. PENTAIR MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
Liability Limitation: IN NO EVENT SHALL PENTAIR MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL,
INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY PENTAIR MYERS
PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER
INSTALLATION. PENTAIR MYERS DISCLAIMS ALL LIABILITY, INCLUDING LIABILITY UNDER THIS WARRANTY, FOR
IMPROPER INSTALLATION. PENTAIR MYERS RECOMMENDS INSTALLATION BY PROFESSIONALS.
Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or
consequential damages and therefore such limitations may not apply to you. No warranties or representations at any
time made by any representatives of Pentair Myers shall vary or expand the provision hereof.
1101 MYERS PARKWAY 490 PINEBUSH ROAD, UNIT 4
ASHLAND, OHIO 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
PH: 855-274-8947 PH: 800-363-7867
WWW.FEMYERS.COM WWW.FEMYERS.COM