Pioneer PB Series Manual

Revision 008 9/13/2018
Pioneer Self Priming Series
PB & PEB Series
Operation & Maintenance Manual

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TABLE of CONTENTS
TABLE OF CONTENTS........................................................................................................................................... 2
INTRODUCTION .................................................................................................................................................. 3
INSPECTION ........................................................................................................................................................ 3
PRE-INSTALLATION INSPECTION ............................................................................................................................3
RECORDING MODEL &SERIAL NUMBERS...............................................................................................................4
WARRANTY INFORMATION....................................................................................................................................4
SAFETY INFORMATION...........................................................................................................................................4
INSTALLATION .................................................................................................................................................... 5
FOUNDATION/BASE PLATE/SKID............................................................................................................................5
LEVELING................................................................................................................................................................6
GROUT ...................................................................................................................................................................6
TRAILER MOUNTED UNITS .....................................................................................................................................6
INSTALLING PUMP .................................................................................................................................................6
SUCTION PIPING.....................................................................................................................................................6
DISCHARGE PIPING.................................................................................................................................................7
SUCTION &DISCHARGE PIPE FLANGES...................................................................................................................7
SCREENING.............................................................................................................................................................7
SUMP DESIGN ........................................................................................................................................................7
LIFTING...................................................................................................................................................................8
ALIGNMENT OF PUMP AND MOTOR ......................................................................................................................8
ROTATION ..............................................................................................................................................................8
OPERATION ........................................................................................................................................................ 8
PRE-START CHECK LIST ...........................................................................................................................................8
LUBRICATION .........................................................................................................................................................9
PRIMING.................................................................................................................................................................9
OPERATION OF ENGINE DRIVEN UNITS ................................................................................................................10
STARTING .............................................................................................................................................................10
ROTATION ...............................................................................................................................................................10
LIQUID TEMPERATURE AND OVERHEATING.....................................................................................................................11
PUMP VACUUM CHECK..............................................................................................................................................11
STOPPING.............................................................................................................................................................11
MAINTENANCE ................................................................................................................................................. 12
SPARE PARTS ........................................................................................................................................................12
DISASSEMBLY .......................................................................................................................................................13
INSPECTION COVER AND WEAR PLATE (P3B”THROUGH P8B”PUMPS) ...............................................................14
SUCTION CHECK VALVE ........................................................................................................................................14
SUCTION HEAD, WEAR PLATE, AND CHECK VALVE (P10B PUMP).........................................................................14
ROTATING ASSEMBLY ..........................................................................................................................................15
IMPELLER .............................................................................................................................................................15
BACK WEAR PLATE (P10B) ....................................................................................................................................16
MECHANICAL SEAL ...............................................................................................................................................16
PRESSURE RELIEF VALVE ......................................................................................................................................19
LUBRICATION .......................................................................................................................................................20
PUMP STORAGE................................................................................................................................................ 20
TROUBLE SHOOTING......................................................................................................................................... 20

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CONDITIONS AND TERMS OF SALE.................................................................................................................... 22
INTRODUCTION
Thank you for purchasing a Pioneer PB Series Self-Priming centrifugal pump, complete with
integral suction check valve. The pump is designed for handling non-volatile, non-flammable,
mild industrial corrosives, residues and slurries containing large entrained solids.
WARNING!!!
This manual provides installation, operation and maintenance instructions for your Pioneer
Self-Prime Pump and is intended to make your personnel aware of any procedure that requires
special attention because of potential hazards to personnel or equipment. Read all instructions
carefully and remember, pump installations are seldom identical. Therefore, this manual
cannot possibly provide detailed instructions and precautions for each specific application.
Thus, it is the owner/installer’s responsibility to ensure that neither operator safety nor pump
integrity are compromised by installations and applications that are not addressed in this
manual.
WARNING!!!
Centrifugal Pumps are designed for specific service and may or may not be suited for any other
service without loss of performance or potential damage to equipment/personnel. If there is
ever any doubt about suitability for a specific purpose; contact your Pioneer Pump, Inc.
representative or the factory for assistance.
Remember: Pump performance may be affected by changes in pumpage such as, specific
gravity, viscosity, temperature, operating speed and net positive suction head available
(NPSHA).
INSPECTION
The pump assembly was inspected and tested before shipment from the factory. Before
installation, inspect the pump for damage that may have occurred during shipment.
PRE-INSTALLATION INSPECTION
Check as follows: Inspect the pump for cracks, dents, damaged threads, and other obvious
damage.
Check for and tighten loose attaching hardware. Since gaskets tend to shrink after drying,
check for loose hardware at mating surfaces.
Carefully read all warnings and cautions contained in this manual or affixed to the pump, and
perform all duties indicated. Note the direction of rotation indicated on the pump and check
that the pump shaft rotates counter-clockwise when standing on the suction side of the pump
and facing the impeller.

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CAUTION!!!
If equipment is stored more than twelve (12) months, some of the components or lubricants
may have exceeded their maximum shelf life. These must be inspected and replaced as
necessary prior to pump operation to ensure proper pump performance.
RECORDING MODEL & SERIAL NUMBERS
Record the model and serial number for your Pioneer Pump in the spaces provided below.
The factory will need this information when you require parts or service.
Pump Model: _______________________________________
Pump Serial Number: ________________________________
Engine/Motor Serial #: _______________________________
Engine/Motor Mgf: __________________________________
WARRANTY INFORMATION
Pioneer Pump’s current terms and conditions, including limited warranty policy, can be found
on our website http://www.pioneerpump.com from the homepage by selecting More >
Resources > Terms and Conditions or by following this link:
http://pioneerpump.com/media/232391/M5132_Pioneer_Standard_Terms_and_Conditions-1-
.pdf
WARRANTY CLAIMS
Contact the factory to file a warranty claim, before shipping parts back. Parts returned to the
factory without an RMA number on file will be scrapped upon arrival.
SAFETY INFORMATION
These warnings apply to PB Series basic pumps. In many cases, Pioneer Pump, inc. has no
control over or particular knowledge of the power source that will be used. Therefore, refer to
the manual accompanying the power source before attempting to begin operation.
WARNING!!!
Before attempting to open or service the pump:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power source to ensure that the pump will remain
inoperative.
3. Check the temperature before opening any covers, plates or plugs.
4. Allow the pump to cool if overheated.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the Pump.

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WARNING!!!
This pump is designed to handle mild industrial corrosives, residues and slurries containing
large entrained solids. Do not attempt to pump volatile, corrosive, or flammable materials that
may damage the pump or endanger personnel as a result of pump failure.
WARNING!!!
After the pump has been positioned, make certain that the pump and all piping connections are
tight, properly supported and secure before operation. (Refer to Installation section)
DANGER!!!
Do not operate the pump without the guards in place over the rotating parts. Exposed rotating
parts can catch clothing, fingers, or tools, causing severe injury to personnel.
WARNING!!!
Do not remove plates, covers, gauges, pipe plugs, or fittings from an overheated pump. Vapor
pressure within the pump can cause parts being disengaged to be ejected with great force.
Allow the pump to cool before servicing.
WARNING!!!
Do not operate the pump against a closed discharge valve for long periods of time. If operated
against a closed discharge valve, pump components will deteriorate, and the liquid could come
to a boil, build pressure, and cause the pump casing to rupture or explode.
WARNING!!!
Remove suction and discharge piping from pump prior to moving. Use lifting and moving
equipment with adequate capacity and in good repair.
INSTALLATION
Use the following guidelines when installing your new PB Series Self Priming Pump.
WARNING!!!
Review safety information in safety information section. This section is intended to outline
general recommendations and practices required to position and arrange the pump and piping
in static lift situations. If installing the unit in flooded suction applications some of the
information will need to be tailored to the specific application. Never exceed the maximum
permissible operating pressure of the pump as shown on the pump performance curve.
FOUNDATION/BASE PLATE/SKID
If using a concrete foundation it should be rigid enough to inhibit vibration. Pour the
foundation well in advance of installation of pump equipment to allow time for drying and
curing.

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If the pump is to be mounted on a steel frame, or similar structure, it should be set directly over
the supporting beams. These beams and the structure must be rigid enough to prevent
distortion and potential misalignment due to movement within the structure or base.
The location of this structure should be as close as possible to the pumpage source. Provide
adequate space for operation, maintenance and inspection of the pump and equipment.
The concrete foundation should be provided with anchor bolts for attachment to the base plate.
If required, provide adequate drainage to keep pump and motor dry and clean. Also, provide
either leveling nuts or leveling wedges for mounting the base plate to the foundation.
LEVELING
When mounting the base plate to the foundation use the leveling nuts or wedges to provide a
level, flat base plate. Use a machinist's level on the mounting pads and make adjustments as
necessary as the anchor bolts are tightened. This will provide the true alignment between the
pump and motor.
GROUT
If this base plate is to be grouted, ensure that you have the mounting surface flat and level for
correct alignment of pump and motor. Build a dam around the base plate perimeter that is to be
watertight. Use standard grouting practice and be sure to protect (cover) the leveling wedges
with caulk or plastic tape if they are to be removed later. After the grout has thoroughly
hardened, remove forms. If the wedges are removed, fill holes with grout. Seal grout by
covering with a quality paint or sealer.
TRAILER MOUNTED UNITS
See “OPERATION” section.
INSTALLING PUMP
Ensure that all foreign material has been removed from the pump before mounting. Be sure to
remove all shipping protection prior to operation.
NOTE: Many of the bare pumps are shipped with protective guards and coatings.
SUCTION PIPING
For best performance the suction piping should be at least as large as the pump flange, never
smaller. Use an eccentric reducer at the suction flange with the straight side up. The use of
flow-retarding fittings is to be avoided and if necessary should never be placed closer to the
pump suction than four (4) times the pipe diameter. The pump should be at the highest point of
the piping. Slope the piping up to the pump to prevent air pockets and avoid changing pipe
size with the exception of the eccentric reducer mentioned above. All suction piping and
fittings are to be checked for any foreign material (rocks, bolts, wire, etc.) and also any sharp
burrs that could disrupt the flow.
CAUTION!!!

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The suction and discharge pipe/hose material should be compatible with the liquid being
pumped.
CAUTION!!!
If hose is used on the suction line it should be of the reinforced type to prevent collapse under
suction lift.
DANGER!!!
If a manual shut-off valve is installed in the discharge line, it must not be left closed during
operation, a closed manual shut off valve will cause overheating and possible explosive rupture
of the pump casing. Personnel could be severely injured!
DISCHARGE PIPING
Use a concentric taper on the discharge side to increase discharge pipe diameters. All valving
and additional fittings should be the same size as the discharge main-line. The discharge size
should be adequate to maintain reasonable velocities and reduce friction losses. It is strongly
recommended that a pressure relief valve is installed on the discharge piping.
SUCTION & DISCHARGE PIPE FLANGES
All piping is to be supported, braced and lined up square before connection to the pump
flanges. A flexible fitting is recommended on both suction and discharge, to eliminate
misalignment loads or stresses being transmitted to the pump.
NOTE: Flexible pipe couplings must be restrained so as not to transmit any strain to the pump
flanges when expanding or contracting under pressure. Unrestrained expansion fittings can
transmit enormous forces to the pump flanges.
SCREENING
Make provisions for the installation of a suction screen or strainer to prevent any debris from
clogging the impeller. The open area of the strainer should be equal to at least four (4) times
the area of the pipe. The screen should be rigid enough to prevent collapse when flow is
reduced due to clogging.
SUMP DESIGN
The submergence of the suction pipe into the liquid should be at least four (4) to five (5) times
the pipe diameter. If this is not possible then provide a baffle or a floating board. This is to
prevent any vortex action allowing air into the pipe. For best performance a bell mouth fitting
is recommended. Recommended pipe submergences for various flows as well as recommended
bell diameters are shown in the table below whose data was taken from ANSI/HI 9.8-1998.
FLOW (GPM)
500
1000
1500
2000
2500
3000
3500
4000
4500
SUBMERGENCE WITH BELL (FT)
Bell Diameter (in)
6.1
8.6
10.6
12.2
13.6
14.9
16.1
17.2
18.3
Submergence (FT)
2.1
2.6
3.0
3.3
3.5
3.7
3.9
4.1
4.3

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LIFTING
Any lifting equipment is to be rated for at least five (5) times the weight of the item being
lifted. Use only established methods when lifting or moving any heavy components.
ALIGNMENT OF PUMP AND MOTOR
Precise alignment is mandatory to achieve correct performance of the system. Every time a
component is moved this alignment will have to be checked. The alignment can be checked
with a straight edge and an outside caliper, taper thickness gauge, dial indicators, or for best
results, use a laser alignment tool. Use the straight edge across the outside diameters of the
coupling to ensure that the two halves are concentric and parallel. The outside calipers or the
taper thickness gauge is to correct for any angular misalignment and to verify the correct gap
between the coupling flanges. Use a laser alignment tool or dial indicators to adjust for
concentric and angular displacement. With dial indicators, rotate shafts together and take
readings every ninety (90) degrees. Make adjustments by placing shims under the driver, and
be sure that the mounting bolts are properly tightened while taking readings and after final
adjustment then install coupling guard.
ROTATION
Before the pump is started correct rotation must be confirmed. If the rotation is not correct then
follow the direction given by the driver manufacturer.
OPERATION
Review all safety information in the safety information section, before operating the pump.
PRE-START CHECK LIST
1) Verify that rotation is correct and that the shaft rotates freely.
2) Check all piping connections for tightness.
3) Inspect all accessories and make sure they are appropriate for your installation.
4) Verify that the driver and coupling are aligned correctly and that all guards are in place.
5) Ensure that all bearings and grease seals are lubricated.
6) Oil levels should be checked and also, maintained during pump operation.
7) Follow the instruction on all tags, labels and decals attached to the equipment.
8) Review the operations manual furnished with the power source. (Equipment driver)
SUBMERGENCE WITHOUT BELL (FT)
PIPE ID (in)- No Bell
SUBMERGENCE WITHOUT BELL (FT)
3
4.7
4
3.3
6.3
6
2.1
3.7
5.3
8
1.7
2.8
3.8
4.9
6.0
10
1.6
2.3
3.1
3.8
4.6
5.4
6.1
6.9
7.6

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WARNING!!!
This pump is designed to handle most non-volatile, non-flammable liquids containing specified
entrained solids and corrosives. Do not attempt to pump volatile, corrosive, or flammable
liquids that may damage the pump or endanger personnel as a result of pump failure.
CAUTION!!!
Pump speed and operating condition points must be within the continuous performance range
shown on the Performance Curve in the separate Part List Manual for your specific pump
model.
LUBRICATION
This pump is oil lubricated. The bearing housing contains an oil cavity for lubricating the
bearings and an oil cavity for lubricating the mechanical seal in case the pump runs dry. The
sight gauge on the side of the bearing housing should read half full to indicate the bearings
have the correct amount of oil.
PRIMING
This pump is self-priming, but the pump should never be operated without liquid in the pump
casing. The pump casing needs to be half filled with liquid in order to prime.
CAUTION!!!
The pump will not prime when dry. Extended operation of a dry pump will destroy the seal
assembly. Make sure pump casing is half filled with liquid when priming.
Add liquid to the pump casing when:
1. The liquid in the pump casing is low.
2. The pump has not been used to an extended period of time.
3. The pump is being put into service for the first time.
Once the pump casing has been filled, the pump will prime and re-prime as necessary.
WARNING!!!

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Do not attempt to operate the pump unless all connecting piping, fill plug and other fittings are
securely installed, failure to do so, could cause liquid pumped to be forced out under pressure
causing injury to personnel.
WARNING!!!
Never run the pump with the discharge valve closed for extended periods of time. Never use
the suction valve to throttle the flow. Check all suction and discharge piping for leaks.
If a suction strainer is installed, check the pressure drop across the strainer. If the differential in
pressure exceeds five (5) PSI have the strainer cleaned.
OPERATION OF ENGINE DRIVEN UNITS
Review pre-start instructions in the beginning of the Operation section.
Before Starting,
Check the fuel level and oil levels in the engine.
CAUTION!!!
Make sure the pump is level. Lower jack stands and chock the wheels. Use caution when
positioning the skid-mounted unit to prevent damage to the fuel tank. Consult the engine
operations manual before attempting to start the unit.
WARNING!!!
Do not operate the pump without guards in place over the rotating parts. Exposed rotating parts
can catch clothing, fingers or tools, causing severe injury to personnel.
STARTING
Consult the operations manual furnished with the power source.
Rotation
The correct direction of pump rotation is counter-clockwise when standing on the suction side
of the pump and facing the impeller. The pump could be damaged and performance adversely
affected by incorrect rotation. If pump performance is not within the specified limits, verify
rotation. If necessary, check the connection to the power source, and interchange two leads
(three phase power) in order to change rotation.
If an electric motor is used to drive the pump, remove V-belts, couplings, or otherwise
disconnect the pump from the motor before checking motor rotation. Operate the motor
independently while observing the direction of the motor shaft, or cooling fan.
If rotation is incorrect consult the power source operation manual.

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Operation
Open all valves in the discharge line and start the power source. Priming is indicated by a
positive reading on the discharge pressure gauge or by a quieter operation. The pump may not
prime immediately because the suction line must first fill with liquid. If the pump fails to
prime within five minutes, stop it and check the suction line for leaks.
Liquid Temperature and Overheating
The maximum liquid temperature for this pump is 160º F (71º C). Do not apply it at a higher
operating temperature.
Overheating can occur if operated with the valves in the suction and/or discharge lines closed.
Operating against closed valves could bring the liquid to a boil, build pressure, and cause the
pump to rupture or explode. If overheating occurs, stop the pump and allow it to cool before
servicing it. Refill the pump casing with cool liquid.
As a safeguard against rupture or explosion due to heat, this pump is equipped with a pressure
relief valve that will open if vapor pressure within the pump casing reaches a critical point. If
overheating does occur, stop the pump immediately and allow it to cool before servicing it.
Approach any overheated pump cautiously. It is recommended that the pressure relief valve
assembly be replaced at each overhaul, or any time the pump casing overheats and activates the
valve.
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge in the system. Make sure the pump is at
least half filled with liquid. Block the suction line and start the pump. At operating speed, the
pump should pull a vacuum of 20 inches of mercury (508.0 mm) or more. If it does not, check
for air leaks at the suction piping gaskets.
STOPPING
Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly,
damaging shock waves can be transmitted to the pump and piping system. Close all connecting
valves slowly.
On engine driven pumps, reduce the throttle speed slowly and allow the engine to idle briefly
before stopping.
Cold Weather Protection
If the pump is to remain idle during below freezing conditions, drain the pump to prevent
damage from freezing. Also, clean out any solids by flushing with a hose.
Bearing Temperature Check
Bearings normally run at higher than ambient temperatures because of heat generated by
friction. Temperatures up to 160º F (71º C) are considered normal for bearings, and they can
operate safely to at least 180º F (82º C).Measure bearing temperature with a contact-type
thermometer.

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MAINTENANCE
Under normal conditions this pump is designed to run maintenance free, because of its rugged
construction, for extended periods of time. However, all centrifugal pumps contain wear parts
that will gradually deteriorate, affecting pump performance. This pump does contain wear
parts and these parts should be replaced as required to maintain optimum performance.
General maintenance can be performed without removing the pump from the driver. The
following instructions assume a complete disassembly of the pump is required.
The equipment covered in this section is limited to the pump components only. Refer to the
applicable vendor's manual for motors, engines and other accessory equipment. This manual
also provides a troubleshooting section to diagnose many operational or performance problems.
Use the troubleshooting section to help determine the cause of any problems, and only
disassemble the pump components required to remedy the problem condition.
Drain volute case of pumpage when pumping unit is idle to avoid freezing and possible thermal
cracking of pump case.
SPARE PARTS
Spare parts should be kept on hand to reduce downtime. At a minimum the following parts
should be stocked.
Wear Plate
All O-rings
Set of bearings
Mechanical seal
Set of grease seals
If you have unusual pumping conditions, consult Pioneer Pump, Inc. for additional
recommended spare parts.
When ordering parts from Pioneer Pump, Inc. please provide the following information:
1) Pump serial number
2) Pump model
3) Cross section drawing number
4) Part number from cross section drawing
5) Description of part
6) Quantity required
7) Package Vehicle Identification Number (VIN)
WARNING!!!
Before attempting to service this pump, read this manual carefully. Operators and maintenance
personnel should have a good understanding of all aspects of this pump and the pumping
conditions. Failure of operating personnel to be familiar with all aspects of pump operation
outlined in this manual could contribute to equipment damage, bodily injury or possible death.

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WARNING!!!
Before any servicing:
1) Read this manual carefully.
2) Shut down driver and lock out incoming power to ensure that the pump will remain
inoperative.
3) If the pump or components are hot, allow adequate cooling prior to servicing the unit.
4) Close the suction and discharge valves.
5) Vent the pump slowly and drain completely.
WARNING!!!
If this pump is used to handle any hazardous materials that can cause illness, either directly or
indirectly, take precautions by wearing approved protective clothing and use appropriate safety
equipment.
WARNING!!!
Use lifting and moving equipment in good repair and with adequate capacity to prevent injuries
to personnel or damage to equipment. When lifting the pump with chains or cable wrapped
around the pump, make certain that they are positioned so as not to damage the pump, and so
that the load will be balanced. The bail on trailer or skid mounted units is intended for use in
lifting the pump assembly only. Suction and discharge hoses and piping must be removed from
the pump before lifting.
CAUTION!!!
When servicing this pump, use only components provided by Pioneer Pump, Inc. Any use of
non-authorized parts could result in sub-standard performance, damage to equipment and
possible injury to personnel. Non-authorized parts will also void the warranty.
When using this manual any reference to part numbers or names will be directed to the
applicable cross section drawing. These parts will also be called out in the bill of materials for
full description.
WARNING!!!
Select a clean suitable location for any required maintenance, and note that all work must be
performed by qualified personnel.
DISASSEMBLY
Before performing maintenance on your pump, verify the following:
1. Driver is shut down and power is locked out.
2. If pump components are hot, allow to adequately cool.
3. Suction and discharge valves are shut.
4. Drain pump after it has adequately cooled.
5. For power source maintenance refer to power source O & M manual.

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6. Review all safety information and follow the instructions in this manual, as well as, all
tags, labels and decals attached to the pump or related equipment.
INSPECTION COVER AND WEAR PLATE (P3B” THROUGH P8B” PUMPS)
Once the pump has been drained, clean the drain plug and reinstall into inspection cover.
Remove the four (4) hand lugs and use the two (2) jackscrews (3” through 6” pump) provided
to remove the inspection cover and assembled wear plate. Replace the wear plate if it is badly
worn or scored. To remove the wear plate, remove the 2 nuts (3”, 4” pumps), 4 nuts (6”
pumps), or 3 bolts (8” pump). Inspect the inspection cover o-ring and replace if necessary.
SUCTION CHECK VALVE
To service the check valve assembly, remove the check valve bolt, reach through the inspection
cover opening and pull the complete assembly from the suction flange. Service the check valve
as required.
SUCTION HEAD, WEAR PLATE, AND CHECK VALVE (P10B PUMP)
The suction piping must be removed prior to removing the suction head and wear plate. To
remove the suction head, support each end securely with lifting straps and remove the 4 bolts
from the flange. Use the 2 jackscrews to separate the suction head and wear plate assembly
from the volute. Remove the 4 hand knobs to remove the clean-out cover. To service the check
valve, unbolt the check valve housing from the suction head and unbolt the flapper pivot
support and remove flapper.

15
ROTATING ASSEMBLY
The power source must be removed prior to removing the rotating assembly. Drain the oil in
the seal cavity by removing the seal cavity drain plug. Clean and replace the drain plug after
draining seal cavity of oil. Remove the four (4) nuts on studs of the volute, and use the
jackscrews to remove the rotating assembly from the volute. Separate the rotating assembly by
pulling straight away from the pump casing.
IMPELLER
With the rotating assembly removed from the pump casing, remove the impeller lock screw and
unscrew the impeller from the shaft. The impeller was installed at the factory using Loctite®
and so may be fairly difficult to unscrew. A propane torch can be used to ease loosening the

16
screw if necessary. Use the impeller removal tool to fix the shaft from rotating, and use a metal
bar or piece of wood to rotate the impeller counter-clockwise until it is free of the shaft. It may
be necessary to pound the bar with a hammer to loosen the impeller. Inspect the impeller and
replace as necessary. Use caution when removing the impeller.
BACK WEAR PLATE (P10B)
With the rotating assembly out of the volute and the
impeller removed, remove the four (4) nuts to remove the
back wear plate. Replace the wear plate if it is badly worn
or scored.
MECHANICAL SEAL
With the rotating assembly out of the volute and the impeller removed, slide the shaft sleeve
and rotating portion of the seal off of the shaft as one unit (3” to 8” pumps). On the P10B there
is no sleeve or sleeve o-ring. Drain the oil in the seal cavity by removing the seal cavity drain
plug, located on the bearing housing’s bottom front boss (figure 4). Clean and replace the drain
plug after draining seal cavity of oil. Remove the seal housing from the bearing frame, and
place it, face down, on a flat surface. With a suitable tool press on the backside of the
stationary seat until it is removed from the seal housing. On the P10B, the stationary seat is
held in a retainer, and the two are pressed out together.

17
SHAFT AND BEARING
With the mechanical seal removed, remove the bearing
housing drain plug located on the front bottom left of the
bearing frame (figure 4), and drain oil. Clean plug and
reinstall in housing. Remove fasteners, and slide the
bearing cap/SAE bracket and grease seal off the shaft.
Press the grease seal from the bearing cap/SAE bracket.
Place a block of wood against the impeller end of the shaft
and gently tap the shaft and bearings out of the housing.
BEARING REMOVAL
Remove the shaft snap ring. This will require the use of snap ring pliers. It
will be necessary to use a puller or hydraulic press to remove the drive-end bearings and
pump-end bearing from the shaft. If the bearings are to be reused, be certain that puller
jaws bear only against the inside races (shaft-side) of the bearings.
REASSEMBLY OF COMPONENTS
SHAFT AND BEARINGS
Clean the housing and components with appropriate cleaning solvent and use compressed air to
dry components. If bearings need replacement, remove the outboard (drive-end) bearing
retaining ring and use appropriate bearing puller to remove bearings from shaft. Inspect shaft
and replace if distorted, nicked or scratched beyond repair.

18
If bearings are to be replaced, then the bearings may be heated to 250º F for ease of installation.
An induction heater, electric oven or hot plate may be used to heat the bearings. Never use
direct flame to heat bearings.
After heating the bearings slide the bearings on the appropriate shaft end. When installing the
bearings onto the shaft only press against the inner bearing race. The inboard bearing should be
installed with the shielded side toward the impeller. The outboard bearing should have the
integral retaining ring on the bearing O.D. toward the drive-end of the shaft.
After installation of bearing, ensure that bearings are tight against shaft shoulders.
Secure the outboard bearing on the shaft with the bearing retaining ring. Slide the shaft and
assembled bearings into the bearing housing until the retaining ring contacts the bearing
housing.
SEAL INSTALLATION (P3B to P8B)
A new seal assembly should be installed anytime the old
seal is removed. The wear pattern on the old seal can cause
premature failure if reused. Refer to figures 1 and 2.
Thoroughly clean the shaft where the mechanical seal will
be installed, and the seat of the seal housing. Place the
sleeve o-ring over the shaft, past the threads and up against
the shaft shoulder. Lubricate the stationary seat bore and
stationary seat o-ring with P-80, 30 wt. motor oil, or liquid
dish detergent and a little water. DO NOT USE GREASE
OR SILICONE LUBRICANTS.
Carefully slide the cartridge seal assembly over the shaft,
with the stationary seat towards the bore. By hand only,
carefully press on the flanged end of the cartridge seal
sleeve until the stationary seat bottoms in the stationary seat bore. Install impeller according to
instructions.
SEAL INSTALLATION (P10B) See figure 3
Thoroughly clean the shaft where the mechanical seal will be installed. Place the sleeve o-ring
over the shaft, past the threads and up against the shaft shoulder. Lubricate the stationary seat
bore and stationary seat retainer o-ring with 30 wt. motor or liquid dish detergent and a little
water. DO NOT USE GREASE OR SILICONE LUBRICANTS. Press the stationary seat
retainer / stationary seat assembly into the seat bore (by hand only). Lubricate the shaft
surface and the inside diameter of the seal bellows. With the polished seal face of the rotating
element toward the stationary seat, push the rotating element onto the sleeve and up against the
stationary seat. Install the spring retainer onto the back of the rotating element (see fig. 3).
Install the spring against the spring retainer. Install the impeller and check impeller to sealplate
clearance. Follow procedure as outlined in Seal Installation (P3B to P8B

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IMPELLER
The shaft and impeller threads must be completely clean
before re-installing the impeller. Apply anti-seize
compound to the external shaft threads. Do not use anti-
seize compounds on the lockscrew threads! Screw the
impeller onto the shaft until tight. A clearance of .025 to
.035 between the impeller and the seal plate is
recommended for optimum pump efficiency. Measure this
clearance between the impeller and the rotating assembly
with the rotating assembly sitting on the impeller with the
shaft oriented vertically. Add or remove impeller adjusting
shims as required to achieve the correct clearance. Apply
Loctite 2760, or equivalent thread locking compound, to
impeller screw and install impeller washer and screw.
Torque the impeller screw to a minimum of 175 foot pounds, maximum of 235 foot pounds.
Tighten the impeller lock screw by hand, and do not use a pneumatic wrench to tighten the.
Do not allow the shaft to rotate while tightening the lockscrew
INSPECTION COVER AND WEAR PLATE
Re-grease o-ring when installing and use 2760 Loctite® (red), or equivalent, on the wear plate
studs. Installation is the reverse of removal.
ROTATING ASSEMBLY
Re-grease o-ring and install rotating assembly into volute. Installation is the reverse of removal.
Upon installation, the clearance between the suction cover and impeller needs to be verified.
After sliding the rotating assembly back into the volute, evenly tighten rotating element bearing
housing fasteners until impeller lightly contacts wear plate. Note: the shaft will not rotate.
Tighten bearing housing jack screws until .010” to .020” increase in clearance is achieved.
.010” to .020” is the desired clearance between the impeller and wear plate.
This can be determined by taking measurements of the gap between the pump casing and the
bearing housing when the impeller is making contact with the wear plate, then re-measure the
same gap until the above increase in clearance is achieved at each corner of the bearing
housing.
Rotate shaft, making sure there isn’t any impeller/wear plate contact or rubbing. Tighten the
jack screws at each corner of the bearing housing (not too tight), then tighten the jackscrew
lock nuts to maintain setting position. Rotate shaft to verify the shaft is free to rotate without
the impeller rubbing on the wear plate after adjustment. If the impeller continues to rub on the
wear plate, repeat adjustment procedure above until the shaft rotates freely.
PRESSURE RELIEF VALVE
The suction cover is equipped with a pressure relief valve to provide additional safety for the
pump and operator. Make sure the relief valve is set to 80 psi
DANGER!!!
It is recommended that the pressure relief valve assembly be replaced at each overhaul, or any
time the pump overheats and activates the valve. Periodically, the valve should be removed for
inspection and cleaning.

20
LUBRICATION
Proper lubrication is essential to maintain performance and to help ensure trouble free
operation.
Seal Assembly
Prior to starting the pump, remove the seal vent plug and fill the seal cavity with approximately
1 quart of ISO VG 32 viscosity grade 32 Turbine oil, so that the oil level is halfway in the level
sight gauge.
Bearings
The bearing housing was lubricated at the factory and should be maintained at the middle of the
sight gauge. Use an ISO viscosity grade 32 Turbine oil and fill through the air vent hole at the
top right of the bearing frame (figure 4). Under normal use drain and refill bearing housing at
least once every 12 months.
CAUTION!!!
Over-filling of oil can result in premature failure of bearings.
PUMP STORAGE
Pumps are adequately prepared for outside storage prior to shipment, but use the following list
of additional suggestions for extended storage longer than four (4) weeks.
1) Store the unit off the ground so no water will accumulate around the equipment.
2) Protect unit from blowing sand and dirt.
3) Stack no other items on top of pump/equipment.
4) Protect unit from the entry of any animals.
5) Periodically rotate shaft to lubricate bearings and protect bearings from brinelling.
6) Protect unit with approved drying agents.
7) Ensure all bare metal areas are coated with rust preventative.
8) Inspect unit every four (4) weeks and replace drying agents (Silica Gel) as required or a
minimum of ever six (6) months.
9) Keep an inspection record showing dates of inspection with any maintenance preformed
and condition of drying agents.
10)Before installation ensure that all rust protection has been removed. Also, remove any
foreign material that may have accumulated during storage.
11)Before installation remove all drying agents (Silica Gel).
TROUBLE SHOOTING
An ongoing record of performance will assist in any troubleshooting and/or analysis of
problems. A pressure gauge can be installed on the suction and discharge side of the pump to
monitor any changes in differential pressure. Differential pressure is useful in monitoring and
diagnosing any possible degradation in pump performance.