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Installation, Operation, and Maintenance Instructions
Model NM 3171
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Page 3
FOREWORD
This manual provides instructions for the Installation, Operation, and Maintenance of the
Goulds Model NM 3171 Non-Metallic Vertical Process Pump. This manual covers the standard
product plus common options that are available. For special options, supplemental
instructions are supplied. This manual must be read and understood before installation
and start-up.
The design, materials, and workmanship incorporated in the construction of Goulds pumps
makes them capable of giving long, trouble-free service. The life and satisfactory service of
any mechanical unit, however, is enhanced and extended by correct application, proper
installation, periodic inspection, condition monitoring, and careful maintenance. This instruction
manual was prepared to assist operators in understanding the construction and the correct
methods of installing, operating, and maintaining these pumps.
Goulds shall not be liable for physical injury, damage, or delays caused by a failure to
observe the instructions for installation, operation, and maintenance contained in this
manual.
Warranty is valid only when genuine Goulds parts are used.
Use of the equipment on a service other than stated in the order will nullify the warranty,
unless written approval is obtained in advance from Goulds Pumps.
Supervision by an authorized Goulds' representative is recommended to assure proper installation.
Additional manuals can be obtained by contacting your local Goulds representative or by
calling 1-800-446-8537.
THIS MANUAL EXPLAINS
n
Proper Installation
n
Start-up Procedures
n
Operation Procedures
n
Routine Maintenance
n
Pump Overhaul
n
Trouble Shooting
n
Ordering Spare or Repair Parts
NM 3171 IOM 5/08 3
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TABLE OF CONTENTS
PAGE SECTION
7 SAFETY 1
9 GENERAL INFORMATION 2
11 INSTALLATION 3
13 OPERATION 4
15 PREVENTIVE MAINTENANCE 5
17 DISASSEMBLY & REASSEMBLY 6
21 TROUBLESHOOTING 7
23 PRODUCT DESCRIPTION - SECTIONAL VIEW 8
25 ORDERING SPARE PARTS 9
27 APPENDIX 10
NM 3171 IOM 5/08 5
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Page 7
IMPORTANT SAFETY NOTICE
To: Our Valued Customers
User safety is a major focus in the design of our products. Following the precautions outlined in this
manual will minimize your risk of injury.
ITT Goulds pumps will provide safe, trouble-free service when properly installed, maintained, and
operated.
Safe installation, operation, and maintenance of ITT Goulds Pumps equipment are an essential end user
responsibility. This Pump Safety Manual identifies specific safety risks that must be considered at all
times during product life. Understanding and adhering to these safety warnings is mandatory to ensure
personnel, property, and/or the environment will not be harmed. Adherence to these warnings alone,
however, is not sufficient — it is anticipated that the end user will also comply with industry and corporate
safety standards. Identifying and eliminating unsafe installation, operating and maintenance practices is
the responsibility of all individuals involved in the installation, operation, and maintenance of industrial
equipment.
Please take the time to review and understand the safe installation, operation, and maintenance guidelines
outlined in this Pump Safety Manual and the Instruction, Operation, and Maintenance (IOM) manual.
Current manuals are available at
your nearest Goulds Pumps sales representative.
www.gouldspumps.com/literature_ioms.html or by contacting
These manuals must be read and understood before installation and star t-up.
For additional information, contact your nearest Goulds Pumps sales representative or visit our Web site at
www.gouldspumps.com.
S-1
Page 8
SAFETY WARNINGS
Specific to pumping equipment, significant risks bear reinforcement above and beyond normal safety precautions.
WARNING
A pump is a pressure vessel with rotating parts that can be hazard o us. An y press ure vessel can explode,
rupture, or discharge its contents if sufficiently ove r press u r i zed causi n g deat h, personal injury, property
damage, and/or damage to the environment. All necessary measures must be taken to ensure over
pressurization does not occur.
WARNING
Operation of any pumping system with a blocked suction and discharge must be avoided in all cases.
Operation, even for a brief period under these conditions, can cause superheating of enclosed pumpage and
result in a violent explosion. All necessary measures must be taken by the end user to ensure this condition is
avoided.
WARNING
The pump may handle hazardous and/or toxic fluids. Care must be taken to identify the contents of the pump
and eliminate the possibility of exposure, particularly if hazardous and/or toxic. Potential hazards include, but
are not limited to, high temperature, flammable, acidic, caustic, explosive, and other risks.
WARNING
Pumping equipment Instruction, Operation, and Maintenance manuals clearly identify accepted methods for
disassembling pumping units. These methods must be adhered to. Specifically, applying heat to impellers
and/or impeller retaining devices to aid in their removal is strictly forbidden. Trapped liquid can rapidly
expand and result in a violent explosion and injury.
ITT Goulds Pumps will not accept responsibility for physical injury, damage, or delays caused by a failure to
observe the instructions for installation, operation, and maintenance contained in this Pump Safety Manual or the
current IOM available at www.gouldspumps.com/literature.
S-2
Page 9
SAFETY
DEFINITIONS
Throughout this manual the words WARNING, CAUTION, ELECTRICAL, and ATEX are used to indicate
where special operator attention is required.
Observe all Cautions and Warnings highlighted in this Pump Safety Manual and the IOM provided with
your equipment.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
Example:
Pump shall never be operated without coupling guard installed correctly.
CAUTION
Indicates a hazardous situation which, if not avoi ded, could result in minor or moderate injury.
Example: Throttling flow from the suction side may cause cavitation and pump damage.
ELECTRICAL HAZARD
Indicates the possibility of electrical risks if directions are not followed.
Example: Lock out driver power to prevent electric shock, accidental start-up, and physical injury.
When installed in potentially explosive atmospheres, the instructions that follow the Ex symbol must be
followed. Personal injury and/or equipment damage may occur if these instructions are not followed. If there
is any question regarding these requirements or if the equipment is to be modified, please contact an ITT
Goulds Pumps representative before proceeding.
Example:
parts, resulting in a spark and heat generation.
Improper impeller adjustment could cause contact between the rotating and stationary
S-3
Page 10
GENERAL PRECAUTIONS
WARNING
A pump is a pressure vessel with rotating parts that can be hazardous. Hazardous fluids may be contained by the
pump including high temperature, flammable, acidic, caustic, explosive, and other risks. Operators and
maintenance personnel must realize this and follow safety measures. Personal injuries will result if procedures
outlined in this manual are not followed. ITT Goulds Pumps will not accept responsibility for physical injury,
damage or delays caused by a failure to observe the instructions in this manual and the IOM provided with your
equipment.
WARNING
WARNING
General Precautions
NEVER use heat to disassemble pump due to risk of explosion from tapped liquid.
NEVER APPLY HEAT TO REMOVE IMPELLER. It may explode due to
trapped liquid.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
NEVER operate pump without safety devices installed.
NEVER operate pump without coupling guard correctly installed.
NEVER run pump below recommended minimum flow when dry, or without
prime.
ALWAYS lock out power to the driver befo re per fo rming pump maintenance.
NEVER operate pump with discharge valve closed.
NEVER operate pump with suction valve closed.
DO NOT change service application without approval of an authorized ITT
Goulds Pumps representative.
Safety Apparel:
Insulated work gloves when handling hot bearings or using bearing heater
Heavy work gloves when handling parts with shar p ed ges, especially
impellers
Safety glasses (with side shields) for eye protection
Steel-toed shoes for foot protection when handling parts, heavy tools, etc.
Other personal protective equipment to protect against hazardous/toxic fluids
Receiving:
Assembled pumping units and their components are heavy. Failure to properly lift
and support equipment can result in serious physical injury and/or equipment
damage. Lift equipment only at specifically identified lifting points or as
instructed in the current IOM. Current manuals are available at
www.gouldspumps.com/literature_ioms.html or from your local ITT Goulds
Pumps sales representative. Note: Lifting devices (eyebolts, slings, spreaders, etc.)
must be rated, selected, and used for the entire load being lifted.
Alignment:
WARNING
Shaft alignment procedures must be followed to prevent catastrophic failure of
drive components or unintended contact of rotating parts. Follow coupling
manufacturer’s coupling installation and operation procedures.
S-4
Page 11
WARNING
CAUTION
General Precautions
Before beginning any alignment procedure, make sure driver power is locked out.
Failure to lock out driver power will result in serious physical injury.
Piping:
Never draw piping into place by forcing at the flan ged con necti on s of t he pump.
This may impose dangerous strains on the unit and cause misalignment between
pump and driver. Pipe strain will adversely effect the operation of the pump
resulting in physical injury and damage to the equipment.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
CAUTION
CAUTION
WARNING
Flanged Connections:
Use only fasteners of the proper size and material.
Replace all corroded fasteners.
Ensure all fasteners are properly tightened and there are no missing fasteners.
Startup and Operation:
When installing in a potentially explosive environment, please ensure that the
motor is properly certified.
Operating pump in reverse rotation may result in contact of metal parts, heat
generation, and breach of containment.
Lock out driver power to prevent accidental start-up and physical injury.
The impeller clearance setting procedure must be followed. Improperly setting
the clearance or not following any of the proper procedures can result in sparks,
unexpected heat generation and equipment damage.
If using a cartridge mechanical seal, the centering clips must be installed and set
screws loosened prior to setting impeller clearance. Failure to do so could result
in sparks, heat generation, and mechanical seal damage.
The coupling used in an ATEX classified environment must be properly certified
and must be constructed from a non-sparking material.
Never operate a pump without coupling guard properly installed. Personal injury
will occur if pump is run without coupling guard.
Make sure to properly lubricate the bearings. Failure to do so may result in excess
heat generation, sparks, and / or premature failure.
The mechanical seal used in an ATEX classified environment must be properly
certified. Prior to start up, ensure all points of potential leakage of process fluid to
the work environment are closed.
Never operate the pump without liquid supplied to mechanical seal. Running a
mechanical seal dry, even for a few seconds, can cause seal damage and must be
avoided. Physical injury can occur if mechanical seal fails.
Never attempt to replace packing until the driver is properly locked out and the
coupling spacer is removed.
WARNING
WARNING
S-5
Dynamic seals are not allowed in an ATEX classified environment.
DO NOT operate pump below minimum rated flows or with suction and/or
discharge valve closed. These conditions may create an explosive hazard due to
vaporization of pumpage and can quickly lead to pump failure and physical injury.
Page 12
WARNING
WARNING
WARNING
WARNING
WARNING
CAUTION
CAUTION
WARNING
CAUTION
CAUTION
General Precautions
Ensure pump is isolated from system and pressure is relieved before
disassembling pump, removing plu gs, ope ni n g vent or drain valves, or
disconnecting piping.
Shutdown, Disassembly, and Reassembly:
Pump components can be heavy. Proper methods of lifting must be employed to
avoid physical injury and/or equipment damage. Steel toed shoes must be worn at
all times.
The pump may handle hazardous and/or toxic fluids. Observe proper
decontamination procedures. Proper personal protective equipment should be
worn. Precautions must be taken to prevent physical injury. Pumpage must be
handled and disposed of in conformance with applicable environmental
regulations.
Operator must be aware of pumpage and safety precautions to prevent physical
injury.
Lock out driver power to prevent accidental startup and physical injury.
Allow all system and pump components to cool before handling them to prevent
physical injury.
If pump is a Model NM3171, NM3196, 3198, 3298, V3298, SP3298, 4150, 4550,
or 3107, there may be a risk of static electric discharge from plastic parts that are
not properly grounded. If pumped fluid is non-conductive, pump should be
drained and flushed with a conductive fluid under conditions that will not allow
for a spark to be released to the atmosphere.
Never apply heat to remove an impeller. The use of heat may cause an explosion
due to trapped fluid, resulting in severe physical injury and property damage.
Wear heavy work gloves when handling impellers as sharp edges may cause
physical injury.
Wear insulated gloves when using a bearing heater. Bearings will get hot and can
cause physical injury.
S-6
Page 13
ATEX CONSIDERATIONS and INTENDED USE
Special care must be taken in potentially explosive environments to ensure that the equipment is properly
maintained. This includes but is not limited to:
1. Monitoring the pump frame and liquid end temperature.
2. Maintaining proper bearing lubrication.
3. Ensuring that the pump is operated in the intended hydraulic range.
The ATEX conformance is only applicable when the pump unit is operated within its intended use. Operating,
installing or maintaining the pump unit in any way that is not covered in the Instruction, Operation, and
Maintenance manual (IOM) can cause serious personal injury or damage to the equipment. This includes any
modification to the equipment or use of parts not provided by ITT Goulds Pumps. If there is any question
regarding the intended use of the equipment, please contact an ITT Goulds represe ntative before proceeding.
Current IOMs are available at
Pumps Sales representative.
All pumping unit (pump, seal, coupling, motor and pump accessories) certified for use in an ATEX classified
environment, are identified by an ATEX tag secured to the pump or the baseplate on which it is mounted. A
typical tag would look like this:
www.gouldspumps.com/literature_ioms.html or from your local ITT Goulds
The CE and the Ex designate the ATEX compliance. The code directly below these symbols reads as follows:
II = Group 2
2 = Category 2
G/D = Gas and Dust present
T4 = Temperature class, can be T1 to T6 (see Table 1)
Table 1
Max permissible
surface temperature
Code
T1 842 (450) 700 (372)
T2 572 (300) 530 (277)
T3 392 (200) 350 (177)
T4 275 (135) 235 (113)
T5 212 (100) Option not available
T6 185 (85) Option not available
o
F (oC)
The code classification marked on the equipment must be in accordance with the specified area where the
equipment will be installed. If it is not, do not operate the equipment and contact your ITT Goulds Pumps sales
representative before proceeding.
Max permissible
liquid temperature
o
F (oC)
S-7
Page 14
PARTS
The use of genuine Goulds parts will provide the safest and
most reliable operation of your pump. ITT Goulds Pumps ISO
certification and quality control procedures ensure the parts are
manufactured to the highest quality and safety levels.
Please contact your local Goulds representative for details on
genuine Goulds parts.
S-8
Page 15
GENERAL INFORMATION
PUMP DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Importance of Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Special Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Receiving Inspection - Shortages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Preservation and Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Handling Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PUMP DESCRIPTION
Goulds Model NM 3171 is a vertical centrifugal
submerged or wet pit type pump intended for
installation directly into a sump or vessel vented to
atmospheric pressure.
All pump parts in contact with the pumpage are
constructed of glass reinforced vinylester or
polyester resin, except for the shaft and hardware,
which are of an alloy selected for compatibility with
the pumpage.
The design of the NM 3171 incorporates one or
more non-metallic column (steady) bearings which
require a source of clean liquid for cooling and
lubrication.
GENERAL INFORMATION
IMPORTANCE OF INSTRUCTIONS
This instruction manual is intended to assist those
involved with the installation, operation and
maintenance of Goulds Model NM 3171 pump. It is
recommended that this manual be thoroughly
reviewed prior to installing or performing any work
on the pump or motor.
Study thoroughly and carefully follow the instructions
for installation and operation. Keep this instruction
manual available for reference.
Further information may be obtained by contacting
the Seneca Falls Operations at Goulds Pumps,
Seneca Falls, N.Y. 13148, or your nearest Goulds
sales office or representative.
PRECAUTIONS
s
! WARNING
Personal injuries will result if procedures
outlined in this manual are not followed.
1. Do not over tighten bolts and nuts. Tighten
according to Chart C-l (Appendix I)
2. Never rotate pump in the wrong direction.
Severe pump damage can be caused by wrong
rotation. Proper rotation direction is indicated on
the motor support (240).
3. Never force pump parts during disassembly or
assembly.
4. Avoid undue impacts or shocks to pump while
hanging.
NM 3171 IOM 5/08 9
Page 16
5. Do not put pipe strain or bending moments on
discharge pipe and flange (195C). Piping should
be independently supported and should line up
naturally with the discharge. Use properly
restrained expansion joints between pump and
piping.
6. Clean liquid must be applied to the column
bearings (213) at a rate of 0.25 - 0.50 GPM
(0.16 - 0.32 I/s)
7. Never operate pump without coupling guard
correctly installed.
8. Never operate pump beyond the rated
conditions to which the pump was supplied.
9. Never operate pump without safety devices
installed.
10. Lower ends of pumps must be braced in
turbulent sumps.
11. Always lock out power to the driver before
performing pump maintenance.
PRESERVATION AND STORAGE
Goulds' normal domestic storage preparation is
suitable for protecting the pump during shipment in
covered trucks. It also provides protection during
covered storage at the job site and for a short period
before installation and start-up.
Motor manufacturers should be contacted for their
recommendations on preservation and protection
procedures.
HANDLING TECHNIQUES
! WARNING
s
Pump and components are heavy. Failure to
properly lift and support equipment could
result in serious physical injury, or damage
to pumps. Steel toed shoes must be worn at
all times.
Care should be used in moving pumps. Slings
should be put under the mounting plate (189) to
properly support the unit.
SPECIAL WARNINGS
Goulds Pumps will not be liable for any damages or
delay caused by failure to comply with the provisions
of this instruction manual.
This pump is not to be operated at speeds, working
pressures, discharge pressures or temperatures
higher than, or used with liquids other than, that
stated in original order acknowledgement without
written permission of Goulds Pumps.
RECEIVING INSPECTION - SHORTAGES
Care should be taken when unloading pumps. If
shipment is not delivered in good order and in
accordance with the bill of lading, note the damages
or shortages on both receipt and freight bill. Make
any claims to the transportation company
promptly.
Instruction sheets on various components, as well
as the installation, operation and maintenance
instructions for the pump, are included in the
shipment.
Do not discard!
The best method of lifting unit is with parallel
straps attached to a horizontal bar.
10 NM 3171 IOM 5/08
Page 17
INSTALLATION
LOCATION OF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
PREPARATION FOR INSTALLATION . . . . . . . . . . . . . . . . . . . . 11
INSTALLATION OF UNIT IN PIT. . . . . . . . . . . . . . . . . . . . . . . . 11
Assembly Of Motor To Motor Support . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Rotation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Connection Of Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Alignment Of Flexible Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LOCATION OF UNIT
Vertical sump pumps are to be mounted directly in a
sump or tank, with proper support under the
polyester mounting plate (189). Floor space and
head room allotted to the unit must be sufficient for
removal from the sump or tank.
PREPARATION FOR INSTALLATION
Vertical units are shipped completely assembled
except for level controls and motors. Make sure all
bolts are securely tightened. Use a torque wrench
on all non-metallic joints. Bolt and nut torque values
should not exceed those shown in Chart C-l
(Appendix I).
Install level controls per the manufacturer's
recommendations included with the controls.
INSTALLATION OF UNIT IN PIT
Installation must be done with care to avoid damage
and insure proper operation.
1. Check clearance between the unit and pit. There
must be at least 1/2 inch (13 mm) clearance
between the sides of the pumping unit and any
portion of the pit. There should be 5.50 to 7.50
inches (140 to 190 mm) from the bottom of the
pump to the bottom of the pit. Check pump
dimension print for the distance pertaining to
your pump.
2. Guide the assembled pump carefully into pit so
that it does not strike the sides.
3. Once mounting plate (189) is supported on the
pit, shim under mounting plate where necessary
to level unit. Pump must hang vertically to avoid
placing a bending stress on the unit. Bolt
mounting plate to the supports on the pit.
4. Check for free turning. lf shaft (122) does not
turn freely, misadjustment of the discharge pipe
collar (242) may be placing a bending moment
on the column pipe assembly (192), causing the
shaft to bind or rub. lf that occurs, follow the
steps listed below.
a. Loosen set screws (222J). Gently raise or
lower discharge pipe assembly (195) while
rotating shaft (122) by hand in a clockwise
direction until shaft turns freely.
b. Tighten set screws (222J).
NM 3171 IOM 5/08 11
Page 18
ASSEMBLY OF MOTOR TO MOTOR
SUPPORT
If motor is shipped from Goulds' factory, both
coupling halves will be assembled on shafts in their
correct positions. If motor is shipped direct or
furnished by customer, the motor half coupling must
be fitted on motor shaft.
Place motor on motor support (240) and tighten hex
cap screws (370U) snugly.
ROTATION CHECK
Before coupling is connected, motor should be wired
and the direction of rotation checked. A rotation
arrow is located on the motor support (240).
Standard rotation for Model NM 3171 is clockwise
(CW) as viewed from the driver.
! CAUTION
s
Serious damage may result if pump is run in
the wrong direction.
CONNECTION OF PIPING
Connect discharge piping to discharge pipe flange
(195C) above mounting plate (189). This piping
should be independently supported, should align
naturally with the discharge flange, should be as
direct as possible and should have a minimum
number of fittings. A gate valve should be used for
flow control. There should be no strain on the piping,
and a properly restrained expansion joint must be
used.
s
! WARNING
Never draw piping into place by forcing at
the flange connections of the pump. This
may impose dangerous strains on the unit
and adversely affect the operation of the
pump resulting in physical injury and
damage to the equipment.
ALIGNMENT OF FLEXIBLE COUPLING
Check for coupling alignment by laying a straight
edge across both coupling rims at four points 90
degrees apart. When the straight edge rests evenly
at all four points, the coupling will be in correct
alignment. Tighten hex cap screws (370U).
12 NM 3171 IOM 5/08
Page 19
OPERATION
PREPARATION FOR OPERATION . . . . . . . . . . . . . . . . . . . . . . 13
Motor Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Pump Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Check For Free Turning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Priming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Operation Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Operating with Surge Conditions In Line . . . . . . . . . . . . . . . . . . . . . . . . . 14
Freezing Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Shutdown Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PREPARATION FOR OPERATION
MOTOR BEARINGS
Check and follow motor manufacture's lubrication
instructions.
PUMP BEARINGS
The upper (ball) bearing (112) is greased for life. No
additional lubrication is necessary.
Optional regreasable ball bearing is available upon
request. Grease is applied as standard from Goulds
Pumps. The bearing must be regreased periodically
through the grease fitting in the bearing housing.
The column bearings (213) are a sleeve type and
are made of Rulon, a corrosion resistant
non-metallic bearing material. The bearings must be
lubricated. If the pumpage is clean and suitable for
lubrication, a bypass off the discharge is possible. If
not, a connection above the mounting plate (189)
will be provided for bearing lubrication. A flow of
15-30 GPH (gallons per hour) (57-115 liters per
hour) of clean water is sufficient to lubricate the
bearing.
COUPLING
Assure that the coupling is properly lubricated if
required by the coupling manufacturer's instructions.
CHECK FOR FREE TURNING
Before pump is started, rotate shaft by hand to be
sure it is free. If pump cannot be turned by hand, or
binding or rubbing is noticed, refer to Installation of
Unit in Pit, Step 4 (page 11).
Install coupling guard securely before starting the
pump to prevent serious injury.
PRIMING
The pump must be full of liquid with specified
submergence head above centerline of impeller.
NM 3171 IOM 5/08 13
Page 20
OPERATION
! WARNING
s
Check motor rotation before coupling motor
to pump. Refer to Rotation Check (page 12)
for instructions.
! CAUTION
s
Serious damage may result if pump is run in
the wrong rotation.
START-UP PROCEDURE
1. Connect coupling, following instructions for the
particular make of coupling used. This data is
supplied separately, giving complete instructions
for connection, lubrication, alignment and
maintenance.
2. Check for free turning.
3. Install coupling guard.
! WARNING
s
Never operate a pump without coupling
guard properly installed. Personal injury will
occur if pump is run without coupling guard.
4. Before pump is started, the flushing flow
specified in Precautions, Step 6 (page 10)
should be started. Do not run the pump without
flush to the column bearings (213). (Internal for
clean liquids - external for dirty liquid).
OPERATING WITH SURGE CONDITIONS IN
LINE
If the pump is installed with a quick-acting valve in
the discharge line that could close when the pump is
running, dangerous pressure surges may be built up
that can cause damage to the pump or line. In
services of this kind, some cushioning arrangement
must be provided to protect the pumping equipment.
FREEZING CONDITIONS
If exposed to freezing conditions while the pump is
standing idle, liquid inside the pump must be
drained.
SHUTDOWN PRACTICE
When a check valve is installed in the discharge, the
pump can be shut off without closing any valves.
When no check valve is used, the discharge valve
must be closed before the pump is stopped to
prevent back flow through the pump.
! WARNING
s
When handling hazardous and/or toxic fluids,
proper personal protective equipment should
be worn. If pump is being drained,
precautions must be taken to prevent
physical injury. Pumpage must be handled
and disposed of in conformace with
applicable environmental regulation.
5. Starting: Pump is now ready to start. Start pump
with closed or slightly opened discharge valve.
Open immediately after starting.
OPERATIONAL CHECKS
Inspect pump carefully and frequently during the first
few hours of operation. Check motor for excessive
heating. Check motor for excessive vibration or
unusual noise. Do not run pump at greatly reduced
flow because all the motor power will go into heating
the liquid in the pump and damage may result. If this
condition exists over a long period, the temperature
of the liquid in the pump may increase until the
boiling point is reached. If this occurs, the rotating
parts are exposed to vapor with no lubrication, and
they may score or even seize to the stationary parts.
Continued operation under these conditions may
create an explosive hazard due to the confined
vapor under high pressure and temperature.
14 NM 3171 IOM 5/08
Page 21
PREVENTIVE MAINTENANCE
LUBRICATION
The ball bearing (112) supplied is greased for life.
No further lubrication is required. Column bearings
(213) must be lubricated by an integral pumpage
flush or clean source of external liquid flush.
Consult Goulds Pumps for appropriate option.
Follow motor and coupling manufacturers lubrication
instructions.
VIBRATION
It is good practice to periodically monitor vibration of
the pump. Normally, vibration level will be well below
accepted standards. Of equal importance is that the
vibration level not increase. If a problem with
vibration is encountered, refer to Trouble Shooting
(page 20).
NM 3171 IOM 5/08 15
Page 22
Page 23
DISASSEMBLY & REASSEMBLY
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Inspection And Parts Replacement Guidelines . . . . . . . . . . . . . . . . . . . . . . 18
REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Impeller Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
DISASSEMBLY
1. Lock out power supply to motor.
! WARNING
s
Lockout driver power ro prevent accidental
start up and physical injury.
2. Shut off valves controlling flow from pump.
3. Disconnect coupling.
4. Disconnect motor and remove from motor
support (240).
5. Remove coupling hub.
6. Remove motor support (240) from adapter (106)
by removing screws (371 S).
7. Disconnect discharge pipe at the discharge
flange (195C).
8. Dismantle flow controls (when furnished).
9. Loosen and remove mounting plate to pump
support structure screws or bolts.
10. Disconnect flush lines (190).
11. Lift pump from sump and if possible,
disassemble in vertical position. If not, lay
horizontally on proper supports.
SAVE ALL BOLTS, NUTS, SCREWS AND
MISCELLANEOUS HARDWARE.
THEY ARE OF ALLOY CONSTRUCTION FOR
CORROSION RESISTANCE.
12. Loosen pipe collar set screws (222J).
13. Remove casing/discharge pipe assembly
screws (371H).
14. Remove casing/discharge gasket (351A).
15. Remove casing/suction tail pipe assembly
screws (372A).
16. Remove suction tail pipe assembly (161) and
gasket (36OY).
17. Remove casing stud nuts (425).
18. Remove casing (100). It may be necessary to
GENTLY tap or pry casing loose from pump
cover (160).
19. Remove pump cover O-ring (4122).
20. Unscrew impeller (101) from shaft (122).
NOTE: Model NM 3171 impellers are threaded
onto the pump shaft and removal can be
difficult unless some means is used to hold
the shaft from turning.
s
! WARNING
Operator must be aware of pump and safety
precautions to prevent physical injury.
s
! WARNING
Pump components can be heavy. Proper
methods of lifting must be employed to avoid
physical injury and/or equipment damage.
Steel toed shoes must he worn at all times.
NM 3171 IOM 5/08 17
21. Remove impeller O-ring (412A).
22. Remove and discard anti-rotation pin (445A).
23. Disconnect any column bearing flush tubing.
24. Unscrew impeller adjustment bolts (370D) and
bearing end cover to bearing housing screws
(37OC).
25. Remove bearing end cover (109) and O-ring
(496).
Page 24
26. Remove bearing locknut (136) and bearing
lockwasher (382).
27. Pull ball (thrust) bearing (112) off shaft (122)
using suitable bearing puller and pulling on
bearing housing (134). DO NOT hammer on
pump shaft to remove bearing.
INSPECTION AND PARTS REPLACEMENT
GUIDELINES
Impeller (101) - Replace if impeller shows excessive
erosion, corrosion, extreme wear or vane breakage.
O-ring groove and impeller hub must be in good
condition. Check impeller balance if possible.
28. Slide pump shaft (122) out of column assembly
(192) from impeller end.
29. Unscrew column pipe assembly/pump cover
screws (371W).
30. Remove pump cover (180). Be sure shaft
column assembly (192) is supported properly.
31. Remove column bearing housing (213).
Note: Pump may be supplied with
intermediate column bearing housing (213),
Remove column/column screws (372B),
column pipe assemblies (192) and
intermediate column bearing housings (213)
individually.
32. Remove column pipe assembly/protector plate
screws (371Z).
33. Remove shaft column assembly (192).
Note: Protector plate (215) should not be
removed unless it is to be replaced. To
remove protector plate, unscrew protector
plate/mounting plate screws (317X). Remove
protector plate from mounting plate (189).
Shaft (122) - Check for runout (.005" MAX) to see
that the shaft has not been bent. Shaft surface and
threads must be in good condition. Replace if
necessary.
Casing (100) - Replace if casing shows excessive
erosion, corrosion or extreme wear.
Lip Seals - upper (332) and lower (333A) - Replace
if damaged.
Vapor Seal (215A) - Replace if damaged.
Column Bearing Assembiy (213) - Assure flush
passages are clean. Check clearance. Assembly
should be replaced if diametral clearance exceeds
0.062" (1.6mm).
Flush Tubing (190) - Make sure tubing is clear and
clean.
Ball Bearing (112) - Renew at each overhaul and
when damage is obvious (through vibration, etc.).
Note: Refer to back cover for information on
ordering spare parts.
18 NM 3171 IOM 5/08
Page 25
REASSEMBLY
This procedure covers reassembly of pumps after
complete disassembly. Make sure all Inspection and
Parts Replacements Guidelines above have been
followed.
All parts should be clean before assembly. This is
especially important for O-ring grooves, threads,
lock fits, and gasket surfaces. Any burrs should be
removed.
If access permits, it is recommended that the pump
be reassembled in vertical position. If necessary to
reassemble pump in horizontal position, be sure to
properly support shaft (122) and shaft column
assembly (192).
NOTE: Refer to Chart C-1 (Appendix I) for
recommended torque values.
1. Slide mounting plate (189) and adapter (108)
assembly on shaft (122) from motor end and
past ball (thrust) bearing (112) location.
2. Install vapor seal (215A).
3. Install new lower lip seal (333A) (if required) in
bearing housing (134).
13. Install impeller adjustment screws (370D) and
bearing end cover screws (370C).
14. Lubricate outside surface of bearing housing
(134).
15. Pull mounting plate (169) and adapter (106)
assembly over bearing housing (134). If
assembly becomes cocked, push apart and
realign. It may be necessary to use bearing end
cover screw (370C) to seat bearing housing in
adapter (106).
16. Slide first column pipe assembly (192) over
pump shaft (122) and fasten to protector plate
(215) using screws (371Z). Make sure vent hole
is toward protector plate.
17. Slide a column bearing assembly (213) against
the column pipe assembly (192) flange. Make
sure drilled flush opening in column bearing
assembly matches location of holes in mounting
plate (169).
18. Install additional column pipes (192) and column
bearing assemblies (213), if any, using screws
(3728).
4. Slide bearing housing (134) on shaft (122). Be
careful not to damage lip seal (333A).
5. Lubricate bearing seat on shaft (122) and slide
the ball bearing (112) as far as possible by
hand. Place pipe or driving sleeve over shaft
against inner race of bearing. Make sure bearing
is "square" on shaft. Tap or press evenly until
bearing is seated firmly against shaft shoulder.
Do not mar the shaft.
6. Place bearing lockwasher (382) on shaft (122).
7. Tighten bearing locknut (136) firmly on shaft
(122).
8. Bend "tang" of bearing lockwasher (382) into
slot in bearing locknut (136).
9. Pull bearing housing (134) over ball bearing
(112) until firmly seated against bearing.
10. Install new upper lip seal (332) (if required) in
bearing end cover (109).
11. Install bearing housing O-ring (496) in groove in
bearing housing (134).
12. Slide bearing end cover (109) over shaft (122)
and seat in bearing housing (134). Be careful
not to damage lip seal (332).
NOTE: All column bearings (213), except the
last, are to be installed with the bearing
retaining lip facing toward the casing (100).
The last, and in cases where there is only
one bearing assembly, install with bearing
retaining lip facing the motor end of the
pump.
19. Place pump cover (180) against last column
bearing (213).
20. Fasten pump cover (180) to column assembly
(192) using screws (371W).
21. Apply O-ring lube to pump cover O-ring (412Z).
22. Place O-ring in groove of pump cover (180).
23. Apply a small amount of O-ring lube to impeller
O-ring (412A).
24. Install O-ring (412A) in impeller (101).
25. Place new anti-rotation pin (445A) in hole in
shaft threads.
NOTE: Make sure shaft threads and impeller
insert threads are clear of dirt, grease and
oil. Scrube or wipe clean if necessary.
NM 3171 IOM 5/08 19
Page 26
26. Spray shaft (122) threads and impeller (101)
threads with Loctite Locquic Primer T or
equivalent. Allow 5 minutes for drying.
27. Coat entire threaded area of shaft (122) threads
with Loctite 242 or equivalent.
28. Evenly disperse three (3) drops of Loctite 242 or
equivalent on impeller (101) threads. Refer to
manufacturers literature for set and cure times.
33. Connect discharge pipe assembly (195) to
casing using screws (371H).
34. Tighten pipe collar set screws (222J). Make sure
no strain has been placed on the pump. Rotate
shaft (122) by hand to assure that no bending is
present.
35. Replace casing/suction tail pipe assembly
gasket (360Y).
29. Screw impeller (101) on shaft (122) assuring
impeller does not touch pump cover (180). If
impeller does hit, use adjusting screws (370D
and 370C) to correct. Firmly tighten impeller
using Shaft Key Wrench.
Model NM 3171 impellers are threaded onto the
pump shafts. Removal can be difficult unless some
means is used to hold the shaft from turning.
Figure 1 shows a "shaft key wrench" which is an
excellent tool for holding the shaft. It provides a
positive restraint and does not damage the shaft or
coupling hub as a pipe wrench could.
The impeller should be turned clockwise by hand,
raising the shaft key wrench off the table or floor.
The impeller should then be given a quick turn
counter-clockwise causing the wrench to impact the
table.
The shaft key wrench has Goulds Part Number
A01676, and customers can order through their local
Goulds Pumps sales office.
36. Align suction tail pipe assembly (161) with
casing (100) and fasten using screws (372A).
37. Reconnect flush tubing (190) to bearing housing
assembly (213).
38. Install motor support (240) on adapter (106)
using screws (371S).
39. Install coupling hub.
Refer to the Installation section for instruction on
installation. Particular attention should be directed
to instructions concerning alignment and rotation.
IMPELLER ADJUSTMENT
Model NM 3171 is designed so that the impeller
must be adjusted relative to the casing.
This procedure should be followed with pump
installed in the vertical position.
1. Disconnect coupling.
2. Loosen bolts (370D) evenly while slowly rotating
the shaft (122) clockwise until impeller contacts
pump casing (100).
3. Place and zero a dial indicator on top of shaft
(122).
Fig. 1
NOTE: NEVER USE HEAT TO ASSIST IN
IMPELLER REMOVAL! The application of
heat to the hub or nose area of the impeller
will not aid in removal and could cause the
hub area to fail.
30. Align casing studs (356A) with pump cover (180)
and fasten with nuts (425). Torque nuts (425) to
values shown in table C-l.
31. Check axial travel of the impeller (101) within the
casing (100) by using the procedure in Impeller
Adjustment (page 20).
32. Replace casing/discharge pipe assembly gasket
(351A).
4. Tighten evenly and alternately impeller
adjustment bolts (370D) until dial indicator reads
.015" (.38mm). This adjustment has raised the
impeller from contact with the casing (100) .015"
(.38mm) which is the normal clearance between
these two parts.
5. Tighten bearing end cover/bearing housing
screws (370C). Rotate shaft (122) to ensure no
binding or rubbing of parts occurs.
6. Install coupling guard.
20 NM 3171 IOM 5/08
Page 27
TROUBLESHOOTING
CAUSES AND CORRECTIVE MEASURES . . . . . . . . . . . . . . . . . . 21
Problem Possible Causes & Corrections
No liquid delivered, not enough liquid delivered or not enough pressure 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 15, 16, 17
Pump works a while and then quits 4, 5, 7, 8, 9, 17
Pump takes too much power 6, 10, 11, 12, 13, 14, 18, 19, 20, 22
Pump is noisy or vibrates 4, 12, 13, 14, 21, 22
1. Priming - Liquid level in sump not equal to or
greater than minimum submergence.
2. Speed too low - check whether motor wiring is
correct and receives full voltage.
3. System discharge head too high - check system
head, particularly friction losses.
4. Suction lift too high - check sump level.
5. Impeller or piping obstructed - check for
obstructions.
6. Wrong direction of rotation - check rotation.
7. Air pocket in casing increasing - increase level in
sump.
8. Float controls operating incorrectly - check
operation.
9. Entrained air or gases in liquid - consult factory.
10. Impeller clearance too great - check for proper
clearance.
11. Impeller damaged - inspect and replace as
required.
13. Shaft bent - straighten or replace as required.
14. Coupling or pump and driver misaligned - check
alignment and realign if required.
15. Impeller diameter too small - consult factory for
proper impeller diameter.
16. Improper pressure gauge location - check
correct position and discharge nozzle or pipe.
17. Pump cover O-ring damaged - check O-ring and
replace as required.
18. Speed too high - check motor winding voltage.
19. Head lower than rating; pumps too much liquid
-consult factory. Install throttle valve, cut
impeller.
20. Liquid heavier than anticipated - check specific
gravity and viscosity.
21. Cavitation - Consult factory. Increase NPSH
available.
22. Bearings worn out - inspect and replace as
required. Assure bearings have proper
lubrication.
12. Rotating parts bind - check internal wearing
parts for proper clearances.
NM 3171 IOM 5/08 21
Page 28
22 NM 3171 IOM 5/08
Page 29
PARTS LIST AND MATERIALS OF CONSTRUCTION
Item
No.
100 1 Casing GMP-2000
101 1 Impeller with Insert GMP-2000/Hastelloy C
108 1 Adapter Cast Iron
109 1 Bearing End Cover Cast Iron
112 1* Ball Bearing Steel
113 1 Grease Relief Fitting (Optional) Steel
122 1 Shaft 316 SS (Optional - Various Alloys)
134 1 Bearing Housing Cast Iron
136 1* Bearing Locknut Steel
180 1 Pump Cover Polyester
181 1 Suction Tail Pipe Assembly Polyester
189 1 Mounting Plate Polyester
190 A 1-4 Flush Tubing Polypropylene
192 A 1-4 Column Pipe Assembly Vinyl Ester
193A 1 Grease Fitting (Optional) Steel
194 1 Suction Strainer Valox
195 1 Discharge Pipe Assembly Vinyl Ester
195C 1 Flange - Discharge Pipe Vinyl Ester
213 A 1-4 * Column Bearing Assembly Polyester / Rulon
215 1 Protector Plate Polyester
215A 1* Vapor Seal Teflon
222J 3 Set Screw - Pipe Collar / Discharge Assembly 304 SS
240 1 Motor Support Cast Iron
242 1 Pipe Collar Polyester
332 1* Lip Seal - Upper Steel / Buna
333A 1* Lip Seal - Lower Steel / Buna
351A 1* Gasket - Casing / Discharge Pipe Assembly Non-Asbestos
356A B 4-16 Stud - Casing / Pump Cover 316 SS (Optional - Various Alloys)
360Y 1* Gasket - Casing / Tail Pipe Assembly Non-Asbestos
370C 3 H-Cap Screw-Bearing, End Cover / Bearing Housing 304 SS
370D 3 H-Tap Bolt - Impeller Adjustment 304 SS
370U C 4-8 H-Cap Screw - Motor / Motor Support 304 SS
371H B 4-8 H-Cap Screw - Casing / Discharge Pipe Assembly 316 SS
371S 4 H-Cap Screw - Motor Support Adapter 304 SS
371W 4 H-Cap Screw - Column Pipe Assembly / Pump
371X 3 H-Cap Screw - Protector Plate / Meeting Plate 304 SS
371Y 4 H-Cap Screw - Adapter / Protector Plate 304 SS
371Z 4 H-Cap Screw - Column Pipe Assembly / Protector
372A B 4-8 H-Cap Screw - Casing / Suction Tailpipe Assembly 316 SS
372B A 0-12 H-Cap Screw - Column / Column 316 SS
372X 3 H-Cap Screw - Pipe Collar / Meeting Plate 304 SS
382 1* Bearing Lockwasher Steel
400 1 Key Coupling Steel
412A 1* O-Ring, Impeller Acid-Resistant Viton
412Z 1* O-Ring, Pump Cover Acid-Resistant Viton
415 3 Locknut - Impeller Adjustment 304 SS
425 B 4-16 Hex, Nut - Casing / Pump Cover Stud 316 SS
445A 1* Pin, Anti-Rotation Nylon
496A 1* O-Ring, Bearing Housing Buna
* Suggested replacement parts
A Quantity determined by pump setting
B Quantity determined by pump size
C Quantity determined by motor size
Qty Per
Pump
Part Name Material
316 SS
Cover
316 SS
Plate
NM 3171 IOM 5/08 23
Page 30
24 NM 3171 IOM 5/08
Page 31
ORDERING SPARE PARTS
SPARE PARTS
To insure against possible long and costly down
time periods, it is advisable to have spare parts on
hand.
The recommended spare parts for the NM 3171 are:
1. Impeller (101)
2. Shaft Assembly (122)
3. Ball Bearing (112)
4. Column Bearing Assembly (213)
5. Complete set of O-rings and gaskets
INSTRUCTIONS FOR ORDERING SPARE
PART S
Repair orders will be handled with a minimum of
delay if the following directions are allowed:
1. Give model number, size of pump, and serial
number. These can be obtained from the
nameplate.
2. Write plainly the names, part numbers and
materials of the parts required. The names and
numbers should agree with those on the
sectional view in Section VIII.
3. Give the number (quantity) of each part
required.
4. Give complete shipping instructions.
NM 3171 IOM 5/08 25
Page 32
Page 33
APPENDIX I
CHART C-1, RECOMMENDED TORQUE VALUES . . . . . . . . . . . . . . 27
Chart C-1
Recommended Torque Values
(All Values in ft-lb)
Description Item Number Size Recommended Torque Value
Casing Nuts - 6" ST & All MT 425
Casing Nuts - 8" ST Only 425 ½ - 13 40
Nozzle/Connections
1" and 1½" Flanges
Nozzle Connections
2" - 4" Flanges
Column/Pump Cover
Screw All
Protector/Mounting Plate
Screw All
Adapter/Protector Plate
Screw All
Ccolumn/Protector Plate
Screw All
Column Pipe Joint
Screw All
Pipe Collar/Mounting Plate
Screw All
371H ½ 30
371H
371W
371X ½ - 13 25
371Y ½ - 13 15
371Z
372B
372X ½ - 13 25
5
- 11 30
8
5
8
5
- 11
8
5
- 11
8
5
- 11
8
40
25
25
25
NM 3171 IOM 5/08 27
Page 34
Page 35
APPENDIX II
SUPPLEMENTAL INSTRUCTIONS FOR NM3171 MAINTENANCE . . . . . 29
SEALED BEARING DESIGN
This supplement addresses the grease
lubricated/sealed bearing design that uses the
pumpage to externally cool the bearing cavity. The
standard bearing configuration is product lubricated,
and is addressed in the IOM. The bearing housing
will be provided fully assembled. This will include
the bearing housing, bearing, lip seals and snap
rings.
Assembly steps to immediately follow the
attachment of the first column pipe assembly to the
protector plate. (Page 11 of the NM3171 IOM):
1. Squeeze the top lip seal of the bearing assembly
so that it will go over the pump shaft.
2. Slide the bearing assembly onto the shaft and
lock it into place on the lock collar of the column
shaft.
Note: Care must be taken to align the cooling
connections on the bearing housing with the
cooling piping. The same care must be taken
to align the grease connection with the
grease line. All fittings should line up with
the appropriate supply lines as originally
installed by the factory.
Note: it is important to ensure that all air is
out of grease lines and grease lines are
charged before pump startup.
3. Repeat steps 1-3 until all column shafts and
bearing assemblies are in place.
4. Grease the bearing with NLGI#2 Grade Lithium
12 Hydroxysterate EP Grease or equivalent
before assembling grease lines.
5. Assemble all grease lines, fittings and
connectors together but do not connect to
bearing housing.
6. Charge all grease lines from the grease cup
down to the connector of the bearing assembly.
7. Confirm that grease comes out of the male
connector of the bearing assembly, and then
connect to the bearing assembly.
8. Continue with instructions in IOM at point of
placing pump cover against last column bearing.
Note: Keep grease cup reservoir full at all
times.
NM 3171 IOM 5/08 29
Page 36
PARTS LIST AND MATERIALS OF CONSTRUCTION
30 NM 3171 IOM 5/08
Page 37
NM 3171 IOM 5/08 31
Page 38
Page 39
Page 40
HOW TO ORDER
When ordering parts call
1-800-446-8537
or your local Goulds Representative
EMERGENCY SERVICE
Emergency parts service is available
24 hours/day, 365 days/year...
Call 1-800-446-8537
For more information, call your nearest Goulds sales representative or visit our website at www.gouldspumps.com
© copyright 2002 Goulds Pumps, Incorporated,
Form No. I3171NM Rev. 5/08
a subsidiary of ITT Industries, Inc.
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