Power-flo PF30MU Guide

877-24PUMPS • www.poweropumps.com ISP No: PF30-40MU - 1/2021
INSTALLATION, SERVICE & PARTS MANUAL
Series: PF30MU
PF40MU
Self-Priming Frame
Mounted Pumps

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
PF30MU & PF40MU Self-Priming Frame Mounted Pumps
General Safety Information
® Power-Flo is a registered trademark of Power-Flo Technologies Inc. Other brand and product names are trademarks or registered trademarks
of their respective holders. Alteration Rights Reserved. 1/09, 8/09, 9/09, 3/11, 8/11, 6/13, 1/14, 7/14, 9/2020, 1/2021
Before installation, read the following
instructions carefully. Failure to follow
instruction and Safety information could
cause serious bodily injury, death and/or
property damage. Each Power-Flo pump is
individually factory tested to insure proper
performance. Closely following these
instructions will eliminate potential operating
problems, assuring years of trouble-free
service.
“Danger” indicates
an imminenty
hazardous situation which, if not avoided,
WILL result in death or serious injury.
“Warning” indicates
an imminenty
hazardous situation which, if not avoided,
MAY result in death or serious injury.
“Caution” indicates
an potentially
hazardous situation which, if not avoided,
MAY result in minor or moderate injury.
IMPORTANT - Power-Flo Pumps and
Systems is not responsible for losses, injury
or death resulting from failure to observe
these safety precautions, misuse, abuse or
misapplication of pumps or equipment.
ALL RETURNED
PRODUCTS MUST BE
CLEANED, SANITIZED,
OR DECONTAMINATED
PRIOR TO SHIPMENT, TO
INSURE EMPLOYEES WILL NOT BE EXPOSED
TO HEALTH HAZARDS IN HANDLING SAID
MATERIAL. ALL APPLICABLE LAWS AND
REGULATIONS SHALL APPLY.
Installation, wiring,
and junction
connections must be in accordance with
the National Electric Code and all applicable
state and local codes. Requirements may
vary depending on usage and location.
Installation and
servicing is to be
conducted by qualied personnel only.
Keep clear of suction
and discharge
openings. Do not insert ngers in
pump with power connected.
Always wear eye
protection when
working on pumps. Do not wear loose
clothing that may become entangled in
moving parts
Pumps build up heat
and pressure during
operation. Allow time
for pumps to cool
before handling or
servicing.
This pump is not
intended for use
in swimming pools or water
installations where human
contact with pumped uid.
Risk of electric shock.
To reduce risk of
electric shock, always disconnect
pump from power source before
handling. Lock out power & tag.
Do not us these
pumps in water
over 160˚F. Do not exceed manufactures
recommended maximum performance, as
this could cause the motor to overheat.
Operation against a
closed discharge
valve will cause
premature bearing
and seal failure.
Heat build up on
self-priming and end suction pumps
may cause dangerous pressures. A high
temperature switch or pressure relief valve
is recommended to be be installed in pump
case.
Carefully read
instruction manuals
supplied with motor or engine before
operating or servicing.
DO NOT pump
hazardous material.
These pumps are NOT to be
installed in locations classied as
hazardous in accordance with the
National Electric Code, ANSI/NFPA 70.
Pumps constructed
with or tted with
bronze/brass may contain lead
levels higher than considered
safe for potable water systems.
Lead is known to cause cancer and birth
defects or other reproductive harm.
Various government agencies have
determined that leaded copper alloys
should not be used in potable water
applications.
IMPORTANT!
Prior to installation, record Model
Number, MFG Date, and/or serial number,
from pump name plate for future
reference.
Model:
Serial:
MFG Date:
WARNING:
CANCER AND REPRODUCTIVE HARM-
WWW.P65WARNINGS.CA.GOV

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Specications
Series: PF30MU
PF40MU
4” x 4”
Universal Drive/Frame Mtd
Trash/Solids Handling
PF30MU & PF40MU Self-Priming Frame Mounted Pumps
DISCHARGE 4” x 4” NPT, Female
LIQUID
TEMPERATURE 160°F Continuous
VOLUTE/WEARPLATE Cast Iron, ASTM A48, Class 30
SEAL PLATE Cast Iron, ASTM A48, Class 30
PEDESTAL Cast Iron, ASTM A48, Class 30
SHAFT Steel
IMPELLER Open trash type.
Material: Cast Iron, ASTM A48, Class 30
O-RINGS Buna-N
HARDWARE Steel
PAINT Air dry enamel
SEAL
Single Mechanical
Self-Lubricating
Material: Carbon/Ceramic/Buna-N
PUMP END BEARING Single Row, Ball, Oil Lubricated
DRIVE END BEARING Double Row, Ball, Oil Lubricated
CHECK VALVE Neoprene Flap type valve, with cast iron
weight
STAINER Steel

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Dimensions
PF30MU & PF40MU Self-Priming Frame Mounted Pumps
Model Weight
PF30MU 330 lbs
PF40MU 330 lbs
Not for pumping ammable liquids or hazardous materials that is not compatible with pump materials.

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Performance
PF30MU Self-Priming Frame Mounted Pumps

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
PF40MU Self-Priming Frame Mounted Pumps
Performance

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Receiving Inspection
Upon receiving the pump, it should be
inspected for damage or shortages.
If damage has occurred, le a claim
immediately with the company that
delivered the pump. If the manual is
removed from the packaging, do not
lose or misplace.
Storage
Any product that is stored for a period
longer than six (6) months from the
date of purchase should be bench
tested prior to installation. A bench
test consists of, checking the impeller
to assure it is free turning and a run
test to assure the motor (and switch
if provided) operate properly. Do not
pump out of liquid.
Location
Locate pump as near as possible to the
liquid being pumped. Do Not place pump
more that 25 feet above the surface of
the liquid supply. Be sure pump is level.
Mount pump rmly so not to move due to
vibration.
Units should be permanently grouted
onto a cement foundation. The pumps
should be level to provide correct
operating conditions. The exible
coupling should be realigned after
grouting to eliminate excessive wear on
the coupling.
Allow a minimum 18 inches in front of the
pump case cover to permit easy removal
and access to the interior of the pump. On
belt drive units, allow a minimum of 10
inches at the shaft end to permit removal
of the pedastal or rotating assembly.
Controls
Be sure the electrical specication of
the control selected properly match the
electrical specications of the pump.
Motor Connection
All wiring of motor and control, overload
protection and grounding should be in
accordance with the National Electrical
Code, State and Local codes. Make motor
connection per label located on motor or
motor manufactures manual.
Rotation
Pump rotation should agree with the
direction on the rotation plate. If rotation
on 3 phase is incorrect, interchange any
two incoming wire leads. Rotation is
“clockwise” when looking from the motor
end.
The impellers are threaded on the shaft
and it is necessary to slide one half of the
coupling back when checking rotation
in order to eliminate the possibility of
unscrewing the impeller and damaging
the pump.
Suction
CAUTION! - Pump should not
be operated without a suction
strainer to prevent foreign
matter from being drawn into
impeller. The strainer should be
cleaned regularly.
The use of pipe the same size as the
port size is highly recommended. Using
a smaller pipe line can cause internal
damage. Make sure all lines have air-tight
joints. The smallest air leak in the suction
line may prevent the pump from priming.
All horizontal suction lines should slope
up to the pump to avoid trapped air
pockets.
Discharge
Connect discharge hose or pipe to the
discharge port. Make sure all lines have
air-tight joints.
Driver
Refere to Engine or Motor Manufacture’s
Instructions.
Lubrication
The bearing housing is the only part that
needs lubricated. The shaft seals and
impeller are lubricated by the liquid being
pumped and needs no other lubrication.
The bearing housing is lled with 90
weight oil for bearing lubrication. The
oil level should be checked periodically.
Check oil level by removing the oil dip
stick (34) and check the level on it.
Priming
Remove pipe plug (31) in top of body (5)
and ll the pump body completely with
solids free liquid. In freezing weather
prime pump with warm water.
DO NOT operate pump without
priming rst. Operating dry will
damage seal.
Starting
To start pump, apply power to motor
or engine per the Motor or Engine
manufacture’s instructions.
Shutdown
Disconnect electric power or stopping
engine to shut down. It is recommended
to drain and ush pump if pump has
been operating in freezing weather.
Service
Turn o and lock out power before
servicing pump.
Check Valve
Disconnect suction piping and remove
hex nuts (24), suction ange (2). DO NOT
PRY ON FLANGE but bump o with block
of wood and a hammer. Remove gasket
(30), weights (3) & (4) and screw (25), and
replace if worn or damaged.
To replace, the HINGE section of gasket
(30) is at the TOP and the LARGE weight is
on the pump side of gasket.
Receiving, Installation & Service
PF30MU & PF40MU Self-Priming Frame Mounted Pumps

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Installation & Service
Body & Impeller
Disconnect suction and discharge piping.
To expose body (5), wear plate (11),
gaskets (28) & (29) and impeller (6) for
clean out or replacement, remove hex
nuts (27) then remove body (5) and wear
plate (11) from bearing pedestal (1). If
impeller (6) needs replacement, unscew
from shaft. The impeller has right hand
threads, so to break loose use a block
of wood against a vane and strike with
hammer. To replace wear plate (11),
remove screws (21).
Shaft Seal
Remove body and impeller. Remove
impeller shims (17), (18) and the seal’s
(14) spring holder, spring and rotating
member of seal from shaft (10). Replace if
worn or damaged.
If stationary member needs replaced,
remove screws (21) and pull seal plate (8)
together with stationary from bearing
housing (1). Press stationary out of seal
plate (8).
Handle all seal parts with care.
Do Not damage lapped faces.
To reassemble, lightly oil seal cavity in seal
plate (8) and ring of stationary member.
Replace seal plate (8) onto bearing
housing (1). Lightly oil shaft (10) press
stationary over shaft and into seal plate
(8). Lightly oil shaft and inner surface
of bellows of rotating member. With
lapped surface facing bearing housing,
slide rotating member onto shaft until
lapped faces are of rotating member
and stationary are together. Use a piece
of tubing or nger pressure, to press on
bellows only, not on the retainer. Driving
lugs in retainer should mate into rotating
member. Replace spring and spring
holder (23) and reassemble remainder of
pump.
When impeller (6) is removed, also
remove shims (17), (18), spring holder,
spring and rotation members of shaft
seal (14). To reassemble be sure to use
a combination of impeller shims (17)
and (18), body gaskets (28) and (29) to
result in an impeller-to-body clearance of
approximately .015”.
Shaft and Bearing
Remove cap screws (22), lockwashers
(16) and pull front bearing cap (7) with
oil seal (15) from bearing pedestal (1).
Remove cap screws (22), lockwashers (16)
and pull rear bearing cap (7) with oil seal
(15) from bearing pedestal (1). Remove
bearing shims (19) and (20). Tap on drive
end of shaft (10) with a block of wood and
a hammer, driving the shaft (10) together
with the complete front bearing (13) and
the roller and cone of the back bearing
(12) out of the pedestal (1). Replace if
required.
Press bearings from shaft. If oil seals are
to be replaced, press used seals out of
bearing caps and replace. Press new seal
into bearing caps with patent number
side out.
Press double row back bearing (12) onto
drive end of shaft (10) seating it snug
against the shaft shoulder. Press single
row, front bearing (13) onto impeller end
of shaft (10) seating it snug against the
shaft shoulder.
Place assembled shaft and bearings into
pedestal (1) key end rst. Bring the front
bearing (13) into position and press in
place. If tight, use a sleeve and hammer
to tap into position. Replace back bearing
cap (7) with oil seal (15) using required
number of shims (19) and (20). DO NOT
seat bearings too tight but make sure that
a snug t is insured, yet permitting free
movement of shaft in bearings. Replace
front bearing cap (7) with oil seal (15)
using required number of shims (19) and
(20) to allow for a .005” shaft end play.
Reassembling remainder of pump.
Rell pedestal with 6.14 oz. of a ISO
VG32, lubricating mineral oil suitable for
hydraulic systems,
PF30MU & PF40MU Self-Priming Frame Mounted Pumps
Figure 1

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Repair Parts
For Repair Part Please supply: Model Number and MFG Date as shown on
Name Plate, and Part Description and Part Number as shown on Parts List.
Figure 2
PF30MU & PF40MU Self-Priming Frame Mounted Pumps

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Repair Parts For Repair Part Please supply: Model Number and MFG Date as shown on
Name Plate, and Part Description and Part Number as shown on Parts List.
PF30MU & PF40MU Self-Priming Frame Mounted Pumps
ITEM QTY DESCRIPTION PART NUMBER
PF30MU
PART NUMBER
PF40MU
1 1 Bearing Housing PF03040005 PF03040005
21 Suction Flange PF03050006 PF03050006
3 1 Weight Large PF03080003 PF03080003
41 Weight Small PF03080004 PF03080004
5 1 Casing PF03090007 PF03090007
6 1 Impeller PF03140007B PF03140007
71 Cap Bearing PF03170002 PF03170002
81 Seal Plate PF03180014 PF03180014
9 1 Shaft Key 3/8” #5163 PF30400634 PF30400634
10 1 Shaft PF30400709 PF30400709
11 1 Wear Plate PF03190005 PF03190005
12 1 Outer Bearing, 3208 PF31020014 PF31020014
13 1 Inner Bearing, 6208 PF31020013 PF31020013
14 1 Shaft Seal 1.25”, T21 PF31030131 PF31030131
15 2Bearing Cap Oil Seal PF31150002 PF31150002
16 8Lockwasher 3/8”  
17 3 Shims Washer 0.10” #1349 PF91010121 PF91010121
18 2Shims Washer .031” #1348 PF91010130 PF91010130
19 2Bearing Cap Shims #5069 PF91010151 PF91010151
20 2Bearing Cap Shims #5068 PF91010152 PF91010152
21 7Conic Head Screw 3/8” x 1.50” Lg  
22 8 Hex Hd Screw 3/8 x 1” Lg  
23 8Screw 5/8 x 2.50” Lg  
24 8 Hex Nut 5/8”  
25 1 Screw 1/4” x 1” Lg  
26 8Screw 1/2” x 2.50” Lg  
27 8 Hex Nut 1/2”  
28 2 Casing Gasket #3188 PF92010148 PF92010148
29 1 Casing Gasket #3189 PF92010149 PF92010149
30 1 Suction Check Valve #1486 PF92010214 PF92010214
31 1 Square Head Plug 2”  
32 1 Square Head Plug 1-1/2”  
33 1 Square Head Plug 1/4”  
34 1 Bayonet PF30400851 PF30400851
() = Aquire standard hardware locally.

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
Risk of electric shock. Always disconnect the pump from the power source before handling inspections or repairs.
Symptom Possible Cause(s) Corrective Action
Little or no discharge and will not prime
1. Pump body not lled with water
2. Total head too high
3. Suction head higher than pump designed for
4. Impeller partially or completely plugged
5. Leak in suction line
6. Foot-valve too small
7. Impeller damaged
8. Foot-valve or suction line not submerged deep
enough in water, pulling air
9. Insucient inlet pressure or suction head
10. Suction piping too small
11. Body gasket leaking
12. Suction or discharge line valves closed
13. Piping damaged
14. Clogged strainer or foot-valve
15. Incorrect engine speed
1. Fill pump body with water.
2. Shorten suction head
3. Lower suction head, install foot-valve and prime
4. Disassemble pump and clean out impeller
5. Repair or replace suction line
6. Match foot-valve size to piping or install one
larger size foot-valve
7. Disassemble pump and replace impeller
8. Submerge lower in water
9. Increase inlet pressure by adding more water to
tank or increasing back pressure by turning gate
valve on discharge line partially closed.
10. Increase pipe size to pump inlet size or larger
11. Replace
12. Open
13. Clean or replace
14. Clean or replace
15. Increase speed
Loss of suction after satisfactory operation
1. Air leak in suction line
2. When pump was last turned o, water siphoned
out of pump body
3. Suction head higher than pump designed for
4. Insucient inlet pressure or suction head
5. Clogged foot-valve, strainer or pump
6. Defective wearplate
1. Repaire or replace suction line
2. Rell (reprime) pump body before restarting
3. Lower suction head, install foot-valve and prime
4. Increase inlet pressure by adding more water to
tank or increasing back pressure by turning gate
valve on discharge line to partially closed.
5. Unclog or replace
6. Replace
Pump overloads driver
1. Total head lower than pump rating, unit
delivering too much water
2. Specic gravity and viscosity of liquid being
pumped dierent than the pump rating
3. Speed to high
1. Increase back pressure by turning gate
valve on discharge line to partially closed
position that will not overload motor.
2. Consult factory
3. Check and correct speed
Pump vibrates and/or makes excessive noise
1. Mounting plate or foundation not rigid enough
2. Foreign material in pump causing unbalance
3. Impeller bent
4. Cavitation present
5. Piping not supported to relieve any strain on
pump assembly
1. Reinforce
2. Disassemble pump and remove
3. Replace impeller
4. Check suction line for proper size and check
valve in suction line if completly open, remove
any sharp bends before pump and shorten
suction line
5. Make necessary adjustments
Pump runs but no uid
1. Air leak in suction piping
2. Pump located too far from uid source
3. Gate valve closed
4. Clogged strainer
5. Fouled foot-valve
6. Discharge height too great
7. Fouled impeller
8. Faulty mechanical seal
1. Replace
2. Replace
3. Open
4. Clean or Replace
5. Clean or Replace
6. Lower the height
7. Clean or Replace
8. Replace
Pump leaks at shaft 1. Worn mechanical seal
2. Seal not installed properly
1. Replace
2. Follow service instructions for installing seal
NOTE: Power-Flo Pumps & Systems assumes no responsibility for damage or injury due to disassembly in the eld. Disassembly of the pumps or supplied
accessories other than at Power-Flo Pumps & Systems or its authorized service centers, automatically voids warranty.
Trouble Shooting Chart
PF30MU & PF40MU Self-Priming Frame Mounted Pumps

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Power-Flo Pumps & Systems • 877-24PUMPS • www.poweropumps.com
LIMITED WARRANTY
PF30MU & PF40MU Self-Priming Frame Mounted Pumps
Manufacturer warrants, to the immediate purchaser and subsequent initial owner during the warranty period,
every new pump to be free from defects in material and workmanship under normal use and service, when
properly used and maintained, for a period of eighteen (18) months from date of manufacture or twelve (12)
months from date of installation (which ever comes rst). Failure due to wear due to exessive abrasives is
not covered. The initial owner is the purchaser who rst uses the pump after its initial installation, or for non-
permanent installation, the rst owner who uses the pump. The date of installation shall be determined by a
dated sales receipt noting the model and serial number of the pump. The dated sales receipt must accompany
the returned pump. Product will be repaired, replaced or remanufactured at Manufacturer’s option. No allowance
will be made for shipping charges, damages, labor or other charges that may occur due to product failure, repair
or replacement. This warranty does not apply to and there shall be no warranty for any material or product that
has been disassembled without prior approval of Manufacturer, subjected to misuse, misapplication, neglect,
alteration, accident or act of God; that has not been installed, operated or maintained in accordance with
Manufacturer’s installation instructions; that has been exposed to outside substances including but not limited
to the following: sand, gravel, cement, mud, tar, hydrocarbons, hydrocarbon derivatives (oil, gasoline, solvents,
etc.), or other abrasive or corrosive substances, wash towels or feminine sanitary products, etc. in all pumping
applications. The warranty set out in the paragraph above is in lieu of all other warranties expressed or implied;
and we do not authorize any representative or other person to assume for us any other liability in connection
with our products. Contact Manufacturer at: 1-877-24PUMPS or www.poweropumps.com, Attention: Customer
Service Department, to obtain any needed repair or replacement of part(s) or additional information pertaining
to our warranty.
MANUFACTURER EXPRESSLY DISCLAIMS LIABILITY FOR SPECIAL, CONSEQUENTIAL OR INCIDENTAL
DAMAGES OR BREACH OF EXPRESSED OR IMPLIEDWARRANTY; AND ANY IMPLIEDWARRANTY OF FITNESS
FOR A PARTICULAR PURPOSE AND OF MERCHANTABILITY SHALL BE LIMITED TO THE DURATION OF THE
EXPRESSED WARRANTY.
Some states do not allow limitations on the duration of an implied warranty, so the above limitation may not
apply to you. Some states do not allow the exclusion or limitation of incidental or consequential damages, so
the above limitation or exclusion may not apply to you. This warranty gives you specic legal rights and you may
also have other rights which vary from state to state.