ITT Goulds Pumps HS User manual

Installation, Operation, and
Maintenance Manual
Model HS

Table of Contents
1 Introduction and Safety ....................................................................................................................................2
1.1 Important Safety Notice.............................................................................................................................2
1.2 Safety Warnings ........................................................................................................................................2
1.3 Safety ........................................................................................................................................................ 3
1.4 General precautions .................................................................................................................................. 3
1.5 Parts .......................................................................................................................................................... 6
2 General Information ..........................................................................................................................................7
2.1 Preparation for shipment ........................................................................................................................... 7
2.2 Installation ................................................................................................................................................. 7
2.3 Pump Driver Alignment ............................................................................................................................. 9
2.4 Stuffing Boxes ......................................................................................................................................... 12
2.5 Pump Start-up ......................................................................................................................................... 14
2.6 Water Hammer ........................................................................................................................................15
2.7 Freezing .................................................................................................................................................. 15
2.8 Locating Problems................................................................................................................................... 15
2.9 Bill of Material and Assembly Drawing .................................................................................................... 16
3 Bearing Frame Assembly ...............................................................................................................................17
3.1 General.................................................................................................................................................... 17
3.2 Bearing Lubrication and Care.................................................................................................................. 17
3.3 Installing a bearing .................................................................................................................................. 18
3.4 Normal bearing temperature ................................................................................................................... 18
3.5 Disassemble the Bearing Assembly........................................................................................................18
3.6 Assemble the bearing assembly ............................................................................................................. 19
4 Liquid End........................................................................................................................................................20
4.1 General Instructions ................................................................................................................................ 20
4.2 Clearance Adjustment ............................................................................................................................. 20
4.3 Disassemble the Liquid End....................................................................................................................20
4.4 Assemble the Liquid End......................................................................................................................... 21
4.5 Special Notice ......................................................................................................................................... 21
Table of Contents
Model HS Installation, Operation, and Maintenance Manual 1

1 Introduction and Safety
1.1 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 man-
ual will minimize your risk of injury.
ITT Goulds pumps will provide safe, trouble-free service when properly installed, maintained, and operat-
ed.
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 guide-
lines outlined in this Pump Safety Manual and the Instruction, Operation, and Maintenance (IOM) man-
ual. Current manuals are available at https://www.gouldspumps.com/en-US/Tools-and-Resources/Litera-
ture/ or by contacting your nearest Goulds Pumps sales representative.
These manuals must be read and understood before installation and start-up.
For additional information, contact your nearest Goulds Pumps sales representative or visit our Web site
at https://www.gouldspumps.com
1.2 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 hazardous. Any pressure vessel
can explode, rupture, or discharge its contents if sufficiently over pressurized causing death,
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 con-
tents of the pump and eliminate the possibility of exposure, particularly if hazardous and/or tox-
ic. Potential hazards include, but are not limited to, high temperature, flammable, acidic, caus-
tic, explosive, and other risks.
1 Introduction and Safety
2 Model HS Installation, Operation, and Maintenance Manual

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 for-
bidden. 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 http://www.gouldspumps.com/literature.
1.3 Safety
Definitions
Throughout this manual the words Warning, Caution, and Electrical are used to indicate where special
operator attention is required.
Observe all Cautions and Warnings highlighted in the 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 avoided, could result in minor or moderate injury.
Example: Throttling flow from the suction side may cause cavitation and pump damage.
Electrical Hazard:
WARNING:
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 in-
jury.
1.4 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 equip-
ment.
Table 1: General Precautions
WARNING NEVER APPLY HEAT TO REMOVE IMPELLER. It may explode due to trap-
ped liquid.
1.3 Safety
Model HS Installation, Operation, and Maintenance Manual 3

WARNING NEVER use heat to disassemble pump due to risk of explosion from tapped
liquid.
WARNING NEVER operate pump without coupling guard correctly installed.
WARNING NEVER run pump below recommended minimum flow when dry, or without
prime.
WARNING ALWAYS lock out power to the driver before performing pump maintenance.
WARNING NEVER operate pump without safety devices installed.
WARNING NEVER operate pump with discharge valve closed.
WARNING NEVER operate pump with suction valve closed.
WARNING DO NOT change service application without approval of an authorized ITT
Goulds Pumps representative.
WARNING Safety Apparel:
•Insulated work gloves when handling hot bearings or using bearing
heater
• Heavy work gloves when handling parts with sharp edges, 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
WARNING Receiving:
Assembled pumping units and their components are heavy. Failure to properly
lift and support equipment can result in serious physical injury and/or equip-
ment damage. Lift equipment only at specifically identified lifting points or as
instructed in the current IOM. Current manuals are available at www.gould-
spumps.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.
WARNING Alignment:
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.
WARNING Before beginning any alignment procedure, make sure driver power is locked
out. Failure to lock out driver power will result in serious physical injury.
CAUTION Piping:
Never draw piping into place by forcing at the flanged connections of the
pump. This may impose dangerous strains on the unit and cause misalign-
ment between pump and driver. Pipe strain will adversely effect the operation
of the pump resulting in physical injury and damage to the equipment.
WARNING Flanged Connections:
Use only fasteners of the proper size and material.
WARNING Replace all corroded fasteners.
WARNING Ensure all fasteners are properly tightened and there are no missing fasten-
ers.
WARNING Startup and Operation:
1.4 General precautions
4 Model HS Installation, Operation, and Maintenance Manual

When installing in a potentially explosive environment, please ensure that the
motor is properly certified.
WARNING Operating pump in reverse rotation may result in contact of metal parts, heat
generation, and breach of containment.
WARNING Lock out driver power to prevent accidental start-up and physical injury.
WARNING 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.
WARNING 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.
WARNING Never operate a pump without coupling guard properly installed. Personal in-
jury will occur if pump is run without coupling guard.
WARNING Make sure to properly lubricate the bearings. Failure to do so may result in ex-
cess heat generation, sparks, and / or premature failure.
CAUTION 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.
WARNING Never attempt to replace packing until the driver is properly locked out and the
coupling spacer is removed.
WARNING DO NOT operate pump below minimum rated flows or with suction and/or dis-
charge valve closed. These conditions may create an explosive hazard due to
vaporization of pumpage and can quickly lead to pump failure and physical in-
jury.
WARNING Ensure pump is isolated from system and pressure is relieved before disas-
sembling pump, removing plugs, opening vent or drain valves, or disconnect-
ing piping.
WARNING 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.
WARNING The pump may handle hazardous and/or toxic fluids. Observe proper decon-
tamination procedures. Proper personal protective equipment should be worn.
Precautions must be taken to prevent physical injury. Pumpage must be han-
dled and disposed of in conformance with applicable environmental regula-
tions.
WARNING Operator must be aware of pumpage and safety precautions to prevent physi-
cal injury.
WARNING Lock out driver power to prevent accidental startup and physical injury.
CAUTION Allow all system and pump components to cool before handling them to pre-
vent physical injury.
CAUTION 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.
WARNING Never apply heat to remove an impeller. The use of heat may cause an explo-
sion due to trapped fluid, resulting in severe physical injury and property dam-
age.
1.4 General precautions
Model HS Installation, Operation, and Maintenance Manual 5

CAUTION Wear heavy work gloves when handling impellers as sharp edges may cause
physical injury.
CAUTION Wear insulated gloves when using a bearing heater. Bearings will get hot and
can cause physical injury.
WARNING Noise:
Sound pressure levels may exceed 80 dbA in operating process plants. Clear
visual warnings or other indicators should be available to those entering an
area with unsafe noise levels. Personnel should wear appropriate hearing pro-
tection when working on or around any equipment, including pumps. Consider
limiting personnel’s exposure time to noise or, where possible, enclosing
equipment to reduce noise. Local law may provide specific guidance regard-
ing exposure of personnel to noise and when noise exposure reduction is re-
quired.
WARNING Temperature:
Equipment and piping surfaces may exceed 130ºF (54ºC) in operating proc-
ess plants. Clear visual warnings or other indicators should alert personnel to
surfaces that may reach a potentially unsafe temperature. Do not touch hot
surfaces. Allow pumps operating at a high temperature to cool sufficiently be-
fore performing maintenance. If touching a hot surface cannot be avoided,
personnel should wear appropriate gloves, clothing, and other protective gear
as necessary. Local law may provide specific guidance regarding exposure of
personnel to unsafe temperatures.
1.5 Parts
The use of genuine Goulds parts will provide the safest and most
reliable operation of your pump. ITT Goulds Pumps ISO certifica-
tion and quality control procedures ensure the parts are manufac-
tured to the highest quality and safety levels.
Please contact your local Goulds representative for details on
genuine Goulds parts.
1.5 Parts
6 Model HS Installation, Operation, and Maintenance Manual

2 General Information
2.1 Preparation for shipment
Goulds pumps are prepared at the factory for shipment under covered conditions. They are protected for
transport and short term covered storage. Unless otherwise specified, it is assumed the pump will be in-
stalled upon delivery. Additional protection can be provided by request.
2.2 Installation
Location of unit
The pump should be located in a clean, dry area free from flooding. The area should provide adequate
space for maintenance and repair, considering complete disassembly and handling of equipment. The
unit should be positioned to provide the most efficient pipeline system.
Piping
Short, direct suction and discharge pipelines and a minimum of elbows and fittings result in the least
amount of pipe friction.
Suction piping
1. Excessive Friction losses will cause cavitation.
2. Must be kept free of air leaks, particularly in long lines or conditions of high suction lift.
3. Flow regulating valves must not be located on suction side of the pump.
Discharge piping
1. Excessive friction losses result in insufficient head.
2. A check valve should be located in the discharge line to protect the pump from reverse flow and
excessive pressure.
Piping support
The pumps are not designed to carry loads imposed by the weight of the pipeline. Suction and discharge
piping must be supported near the pump, unless otherwise specified. Pumps and sub-bases can be de-
signed to carry loads due to thermal expansion.
Foundation
The foundation must be a permanent, rigid support for the sub-base or floor-plate. It should be an indus-
trially accepted design capable of absorbing excessive vibration. Foundations are typically concrete with
anchor bolts cast into secure the pump.
An anchor bolt assembly consists of a bolt and washer with a sleeve 2 times the diameter of the bolt.
When the assembly is cast in concrete, the washer prevents the sleeve and bolt from being pulled. The
sleeve I.D. provides an adjustment allowance around the bolt. A lug is generally welded on the bolt to
prevent rotation when tightening. Anchor bolts should be located in the concrete by a template dimen-
sioned from the pump installation drawing. The top of the sleeve should be temporarily sealed with waste
material to prevent concrete from entering during the concrete pouring operation.
2 General Information
Model HS Installation, Operation, and Maintenance Manual 7

Figure 1: Typical anchor bolt
Installing Pump on Foundation
If sub-bases or floor-plates were directly anchored to poured concrete foundations, surface irregularities
would cause distortion. Rectangular metal blocks and shims, or metal wedges having a small taper, are
placed beside each anchor bolt to level the sub-base or floor-plate, see Figures below, Leveling with
Wedges and Leveling with Blocks and Shims. The anchor bolts are then drawn tight enough to maintain
position and level.
Figure 2: Leveling with wedges
To secure the shims in place and provide a level surface for the base or plate, grout is poured over the
concrete foundation. A ¾" to 1-½" grout allowance is recommended. When subbases have cavities,
grout holes are provided to fill all spaces. After the grout has hardened, permanently tighten the anchor
bolts.
2.2 Installation
8 Model HS Installation, Operation, and Maintenance Manual

Figure 3: Leveling with blocks and shims
When the grout has hardened and the anchor bolts are permanently secured, recheck level.
NOTICE:
On large subbase/floorplates, shimming is recommended to be at 24" spacing.
Figure 4: Typical
2.3 Pump Driver Alignment
Shaft alignment of horizontal pump and driver
Pumps and drivers that are received from the factory with both machines mounted on a common sub-
base were accurately aligned before shipment. Because all sub-bases are, to some extent, flexible, fac-
tory alignment may be altered during shipment and handling. After the sub-base has been leveled, grout-
ed, and secured, check the alignment. Alignment should be rechecked after the pump is fully installed
and before startup. Refer to the "Alignment Procedure."
1. On certain large units, limited end-float couplings are used, and the instruction book furnished
with such units should be consulted for the special alignment instructions that apply to such cou-
plings.
2. Disconnect coupling halves before proceeding with alignment. Check for angular and parallel
alignment in the next section, Alignment Procedure. The faces and outside diameters of the cou-
pling halves must be square and concentric with the bores. If this condition does not exist, the
2.3 Pump Driver Alignment
Model HS Installation, Operation, and Maintenance Manual 9

“Alternate Method” of alignment described in the Pump/Driver Alignment section, is recommend-
ed.
Sub-base mounted horizontal pumps may be shipped with or without drivers and gears. Be sure
pump and drivers are uncoupled before installation. Level by shimming beside each anchor bolt
and grout.
Figure 5: Alignment procedure
Alignment procedure
A check for angular alignment is made by inserting the tape gauge or feelers at four points between the
coupling faces at four points spaced around the coupling. The unit will be in angular alignment when the
measurements show that the coupling faces are the same distance apart at all points (Figure Checking
Angular Alignment).
Figure 6: Checking angular alignment
A check for parallel alignment is made by placing a straight edge across both coupling rims at the top,
bottom, and at both sides. The unit will be in parallel alignment when the straight edge rests evenly on
the coupling rim at all positions. Allowance may be necessary for temperature changes and for coupling
halves that are not of the same outside diameter.
2.3 Pump Driver Alignment
10 Model HS Installation, Operation, and Maintenance Manual

Figure 7: Checking Parallel Alignment
NOTICE:
Care must be taken to have the straight edge parallel to the axis of the shafts (Figure Checking
Parallel Alignment).
Angular and parallel misalignment are corrected by means of shims under the motor mounting feet. After
each change, it is necessary to recheck the alignment of the coupling halves. Adjustment in one direction
may disturb adjustments already made in another direction. It should not be necessary to adjust the
shims under the pump.
The permissible amount of misalignment will vary with the type of pump and driver. The manufacturer’s
recommendations should be obtained and followed.
When the driver is to be mounted on the sub-base in the field, it is necessary to place the subbase with
the pump on the foundation to level the pump shaft, to check the coupling faces, the suction and dis-
charge flanges for horizontal or vertical position, and to make any necessary corrective adjustments.
When the units are lined up cold, it may be necessary to make an allowance for the vertical rise of the
driver and/or pump caused by heating.
Alternate method of alignment
An approved method for putting the coupling halves in final accurate alignment is by the use of a dial
indicator. Check alignment by straight edge, taper gauge or feelers as accurately as possible by proce-
dure indicated above.
Bolt the indicator to the pump half of the coupling. With the indicator button resting on the other half cou-
pling periphery, set the dial to zero, and chalk mark the coupling half at the point where the buttons rest.
For any check (top, bottom, or sides) rotate both shafts by the same amount; i.e., all readings on the dial
must be made with button on the chalk mark.
The dial readings will indicate whether the driver has to be raised or lowered or moved to either side.
After each movement, check to see that coupling faces remain parallel to one another.
With this method, accurate alignment of shaft centers can be obtained even where faces or outside di-
ameters of the coupling halves are not square or concentric with the bores, provided all measurements
for angular alignment are made between the same two points on the faces, and all measurements for
parallel alignment are made between the same two points on the outside diameters. Gross deviations in
squareness or concentricity, however, may cause problems due to the coupling unbalance or abnormal
coupling wear and may need to be corrected for reasons other than accomplishment of shaft alignment.
2.3 Pump Driver Alignment
Model HS Installation, Operation, and Maintenance Manual 11

Alignment of gear type couplings
Gear type couplings are aligned in the same manner as outlined above. However, the coupling covers
must be moved back out of the way and measurements made on the coupling hubs as shown in Figure
Gear Coupling Alignment.
Figure 8: Gear Coupling Alignment
Factors that may disturb alignment
The unit should be checked periodically for alignment. If the unit does not stay in line after being properly
installed, the following are possible causes:
1. Settling, seasoning, or spring of the foundation.
2. Wear of the bearings.
3. Pipe strains distorting or shifting the machine.
4. Springing of the baseplate by heat from an adjacent steam pipe or from a steam turbine.
5. Shifting of the building structure due to variable loading or other causes.
6. Loose nuts or bolts on the pump or driver assembly.
2.4 Stuffing Boxes
In the conventional stuffing box, mechanical seals and packing seal between the stationary and rotating
components of the pump. Generally a clear liquid such as water is forced through the stuffing box to lu-
bricate the sealing elements. The lubricating liquid pressure must exceed the pressure of the pumpage
at the stuffing box. For end suction pumps, lubricating liquid pressure should be 10-15 PSIG higher than
the discharge pressure. For side and double suction pumps, lubricating liquid pressure should be be-
tween 10-15 PSIG higher than the suction pressure.
NOTICE:
To determine suction or discharge pressure, use gauge pressure only.
The piping supplying the lubrication liquid should be fitted tightly to prevent air from entering. On suction
lifts, a small quantity of air entering the pump at this point may result in loss of suction.
Lubrication liquid pressure is controlled by a valve on the outlet piping. Since the liquid leaking from the
stuffing box should be clear, control of the packing lubricant will vary with the condition of the packing.
Increase pressure within the stuffing box by closing outlet valve. Adjustments should be slow and consis-
tent with the run-in procedure for new packing.
The lubricating liquid must be clean, free of grit and acid. Shaft sleeve scoring, packing destruction, and
mechanical seal face damage will result from contaminated lubricant.
2.4 Stuffing Boxes
12 Model HS Installation, Operation, and Maintenance Manual

Packing
Original equipment packing is a suitable grade for the service intended. To replace original packing, con-
tact local packing suppliers.
Figure 9: Typical Stuffing Box
Refer to 2.9 Bill of Material and Assembly Drawing on page 16 for specific packing size and configura-
tion.
Packing procedure
1. Stuffing box and shaft sleeve must be clean and free of grit.
2. Form packing over shaft or mandrel of same diameter. Carefully cut to packing length. Discard
rings cut too short.
3. Pre-form each ring by coiling 1-½ turns.
4. To install packing rings, do not pull straight. Expand the coil as a coil spring
Figure 10: Stuffing Box Packing
5. Expand first coil as shown and insert into stuffing box. Tamp packing to stuffing box shoulder
firmly with the gland. Note where the cut is positioned.
6. Install second and third coils as required by assembly drawing, staggering the cut 90°F-120°F.
7. Insert seal cage (lantern ring) into stuffing box, carefully noting its proper position on assembly
drawing. Failure to properly locate seal cage will result in insufficient packing lubrication. Packing
and shaft sleeve damage will occur.
8. After packing and seal cage are properly installed, insert gland into stuffing box. Tighten gland
nuts finger-tight only. Shaft should turn freely.
9. Follow pump start-up procedure. Turn on stuffing box lubricating liquid and start pump.
2.4 Stuffing Boxes
Model HS Installation, Operation, and Maintenance Manual 13

10. A significant amount of lubricating liquid should leak from gland side of stuffing box. Operate
pump for at least 15 minutes before tightening gland nuts. Make small, even gland nut adjust-
ments to reduce leakage. Allow adequate run-in time between adjustments. Acceptable leakage
is 30-50 drops per minute.
NOTICE:
Do not over-tighten gland nuts. Packing may set permanently and require removal. Overtight-
ened packing causes excessive friction between packing and sleeve, and will result in dam-
aged components. A noticeable temperature increase in stuffing box would indicate insufficient
lubrication.
11. Periodic maintenance is absolutely required for all packed pumps.
Normal shaft run-out should be under .005" to avoid pounding of stuffing box packing. With excessive
shaft run-out, shaft straightening or replacement is necessary.
Mechanical Seals
Most mechanical seals are installed and adjusted at the factory. Due to size and design, some installed
mechanical seals are supplied with shipping retainers. Shipping retainers hold the sealing faces apart to
avoid damage during transport. Shipping retainers must be removed before shaft is to be rotated. Pumps
with retained seal faces will be specially marked and instructions from the seal manufacturer for retainer
removal will be provided.
Mechanical seals have a stationary and a rotating sealing face. Commonly, these sealing rings are of
carbon and ceramic material, brittle in nature, and easily damaged. As the sealing rings seat with the
operation of the pump, a compatible wear pattern develops between the mating surfaces. To disassem-
ble the mechanical seal after the wear pattern is established would necessitate the replacements of the
rotating and stationary sealing elements. Do not replace only one component.
To ensure the life and sealing characteristics of the mechanical seal, lubricating liquid must be circulated
through the stuffing box. Clear, grit-free liquid is necessary.
Special seal information and replacement seal elements should be provided by the seal manufacturer.
Goulds strongly recommends the stocking of replacement sealing elements.
CAUTION:
Do not make shaft adjustments on mechanical seal installations without consulting seal instruc-
tions and pump assembly drawing.
2.5 Pump Start-up
Bearing lubrication
Bearing must have adequate lubrication. Engage external lubrication system. Refer to “Bearing Frame
Assembly Section” of these instructions for specific information.
Shaft Rotation
The pump shaft must turn without any binding or rubbing. By manually turning the rotating element, only
the uniform frictional drag of the bearings and the stuffing box should be sensed.
Correct Rotation of the Driver
The direction of rotation of the driver must be checked before it can be coupled with the pump. The direc-
tion of rotation of the pump is indicated in a prominent location.
2.5 Pump Start-up
14 Model HS Installation, Operation, and Maintenance Manual

Lubricating Lines to Stuffing Box
Lubricating liquid must be flowing to the stuffing box before the pump is started. Both mechanical seals
and packing require lubrication for continuous service.
Priming
The pump must be completely primed before operation.
2.6 Water Hammer
Water hammer is a high pressure surge within a closed pipe system, created by rapid change in the flow
rate. Changes in the flow rate occur when there are sudden changes in pump speed. The most common
cause is the sudden opening or closing of a valve or flow control device. Extensive damage to the pump
and pipeline is a result of water hammer.
2.7 Freezing
If the pump is exposed to below freezing temperatures, the liquid should be drained during idle periods.
2.8 Locating Problems
1. Conditions Leading to Insufficient or No Discharge
1. Insufficient speed.
2. Excessive discharge head.
3. Insufficient NPSH.
4. Worn pump components.
5. Incorrect direction of rotation.
6. Incomplete pump priming.
7. Impeller or discharge pipe clogged.
8. Pumpage viscosity too high.
2. Conditions Leading to Excessive Power Consumption
1. Excessive speed.
2. Pump operating at high horsepower area of the pump curve (off design point).
3. Mechanical binding or rubbing of rotating element.
4. Pumpage specific gravity and/or viscosity too high.
WARNING:
This unit must never be used without prior installation of the safety guards for rotating parts as
prescribed by O.S.H.A.
Operation of this pump with both suction and discharge valves closed for even brief periods of
time is unacceptable and a dangerous practice. It can rapidly lead to a violent pump failure.
2.6 Water Hammer
Model HS Installation, Operation, and Maintenance Manual 15

2.9 Bill of Material and Assembly Drawing
2.9 Bill of Material and Assembly Drawing
16 Model HS Installation, Operation, and Maintenance Manual

3 Bearing Frame Assembly
3.1 General
The inboard of lower bearing is an angular contact ball bearing with high thrust capacity and the out-
board or top bearing is a high radial capacity ball bearing. Grease is the standard lubricant, but bearing
assemblies can be furnished for oil lubrication.
3.2 Bearing Lubrication and Care
NOTICE:
The shaft seals (332) at each bearing should be oiled with a few drops of #20 or #30 oil before
the pump is started to ensure lubrication of the seal lip while the seal is "running in."
Grease lubrication
When the pump is furnished with grease lubrication, a quality bearing grease equivalent to Mobilux #2
should be used to ensure long bearing life.
Grease lubricated pumps are assembled with the bearings hand-packed with grease at the factory and
should be allowed to run for eight hours before any grease is added. The suggested interval for adding a
small amount of grease is five hundred (500) hours; however, the operating conditions and experience of
the customer with other equipment can be used to establish a more suitable lubrication schedule for the
particular application.
Adding excessive amounts of grease will increase the bearing temperature and shorten the lubricating
life of the grease. See Figure 10: Stuffing Box Packing on page 13.
Oil lubrication
When the pump is furnished with oil lubrication, a high quality bearing oil should be used to ensure long
bearing life. Pumps furnished for oil lubrication are shipped without oil. add oil until the level is up to the
oil level line before the unit is started. If too much oil is added, there will be excessive heat generated in
the bearings and there may be leakage from the shaft seals. We recommend a commercial oil such as
Mobil D.T.E., or B.B., or equal. However, a good grade of non-detergent oil of #30 weight is usually satis-
factory. The oil should have a minimum viscosity of 100 Sec. Saybolt at the normal operating tempera-
ture.
For normal operating conditions, change the oil at least once a year and thoroughly flush the bearings. If
the bearing assembly is exposed to dirty or moist conditions, the oil should be changed more often.
3 Bearing Frame Assembly
Model HS Installation, Operation, and Maintenance Manual 17

Figure 11: Oil Lubrication
NOTICE:
"N" - with thrust bearing, (112C), tight against inboard end cover (119B), measure length "L"
and install necessary shims to make .005" - .008" gap at "G".
3.3 Installing a bearing
Long bearing life is quite dependent on careful handling of the bearing when it is out of the housing and
during the installation procedure. Dirt and rough handling are prime enemies of precision bearings. Bear-
ings should be pressed, not "hammered" into place. If heat is used to facilitate the installation, a hot oil
bath is the best method. Bearings for grease lubrication should be hand-packed with grease to ensure
adequate lubrication at startup.
3.4 Normal bearing temperature
The running temperature for a bearing assembly depends on many factors such as speed, bearing
loads, ambient air temperature, and condition of bearings. Temperatures higher than the human hand
can tolerate are very satisfactory for good bearing operation and should not cause any alarm.
For a given speed and loading, the bearing housing temperature will stabilize at some temperature, usu-
ally below 200°F., which will be the normal temperature for that installation. Higher temperatures than
this normal temperature, without any change in speed or loading, can mean a lubrication difficulty or the
approach of a bearing failure.
3.5 Disassemble the Bearing Assembly
1. Disassemble the liquid end in accordance with the instructions for that section.
2. Remove the cap screws which fasten the retainers (109 and 119B) to the bearing housing and pull
the retainers off the shaft. Retainer (119B) will push the slinger (9905) off the shaft with it.
3. Remove the shaft (122) from the bearing frame (134C).
4. Press the bearings off the shaft by pushing against the inner race.
3.3 Installing a bearing
18 Model HS Installation, Operation, and Maintenance Manual