Goulds Pumps 3910 User Manual

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Page 1

Installation, Operation and Maintenance

Model 3910 11th Edition (ISO 13709)

Page 2

FOREWORD

This manual provides instructions for the Installation, Operation, and Maintenance of the Goulds Model 3910 Vertical Bearing Frame In-line Process Pump designed to meet the requirements of

the 11th Edition (ISO 13709) of API* Standard 610. This manual covers the standard product plus common options

supplied. This manual must be read and understood before installation and maintenance.

The design, materials, and workmanship incorporated in the construction of Goulds pumps make them capable of giving long, trouble-free service. The life and satisfactory service of any mechanical unit, however, are 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.

ITT - Goulds Pumps 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.

When pumping unit is installed in a potentially explosive atmosphere, the instructions after 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 a Goulds representative before proceeding.

that are available. For special options, supplemental instructions are

Warranty is valid only when genuine ITT - Goulds Pumps 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 ITT - Goulds Pumps.

Supervision by an authorized ITT - Goulds representative is recommended to assure proper installation.

Additional manuals can be obtained by contacting your local ITT - Goulds representative or by calling 1-(800)-446-8537.

THIS MANUAL EXPLAINS

Proper Installation

Start-up Procedures

Operation Procedures

Routine Maintenance

Pump Overhaul

Troubleshooting

Ordering Spare or Repair Parts

* American Petroleum Institute

1220 L Street, Northwest

Washington, D.C. 20005

3910-11th IOM 5/08 5

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TABLE OF CONTENTS

PAGE

9 SAFETY

13 GENERAL INFORMATION

17 INSTALLATION

21 OPERATION

27 PREVENTIVE MAINTENANCE

31 DISASSEMBLY & REASSEMBLY

SECTION

61 SPARE PARTS

63 APPENDICES

I - 63 Installation & Disassembly Instructions for Goulds ANSI B15.1 Coupling Guards

A - 63 (Casing Mount Motor Support Only) - All Power Ends Except those with

Optional Air Cooling Package

B - 67 (Casing Mount Motor Support Only) - Power Ends with Optional Air Cooling

Package

II - 71 Dial Indicator (Rim-and-Face) Alignment Procedure

III -75 Removal and Installation of Back Pull-Out Assembly Using Goulds Back Pull-Out

Removal Device

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8 3910-11th IOM 5/08

Page 5

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 start-up.

For additional information, contact your nearest Goulds Pumps sales representative or visit our Web site at

www.gouldspumps.com.

S-1

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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 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.

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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 avoided, 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

Example: parts, resulting in a spark and heat generation.

 Improper impeller adjustment could cause contact between the rotating and stationary

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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

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





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 before performing 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 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

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.

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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 flanged connections of the 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

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

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 10

WARNING

CAUTION

WARNING

CAUTION



General Precautions

Ensure pump is isolated from system and pressure is relieved before disassembling pump, removing plugs, opening 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.

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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 representative 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

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

F (oC)

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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.

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GENERAL INFORMATION

PUMP DESCRIPTION ...........................13

NAMEPLATE INFORMATION .....................14

RECEIVING THE PUMP .........................15

Storage Requirements ..........................15

Handling .................................15

PUMP DESCRIPTION

The Model 3910 is a vertical bearing frame in-line centrifugal pump that meets the requirements of API

Standard 610 11th Edition (ISO 13709).

The model is based pump sizes.

Casing - The casing is a vertical in-line mounted design. The gasket is fully confined. ANSI Class 300 raised face serrated flanges are standard; ANSI Class 300 flat face serrated and ring joint flanges are available.

Impeller - The impeller is fully enclosed and key driven by the shaft. An impeller nut with locking set screw prevents axial movement.

Seal Chamber Cover - The Model 3910 seal chamber cover meets API 682 2nd Edition dimensions for improved performance of mechanical seals.

on 5 power ends and 27 hydraulic

Power End - Regreasable bearings are standard. The power end is sealed with labyrinth seals. Pure oil mist lubrication is optional. Some modifications are required to convert from grease to oil mist.

Shaft - The standard shaft is machined and ground to

comply with API 610 11th Edition (ISO 13709) criteria.

Bearings - The inboard (radial) bearing carries only radial load; it is free to float axially in the frame. The outboard (thrust) bearing is shouldered and locked to the shaft and retained in the bearing frame to enable it to carry radial and thrust loads. All fits are precision machined to industry standards. The inboard bearing is a single row deep groove ball bearing. The outboard bearing is a duplex angular contact bearing, which uses a pair of single row angular contact ball bearings mounted back-to-back.

Motor Support - The fabricated steel motor support is designed to support the driver and to provide ample access to both the seal piping and the coupling.

Direction of Rotation - Counterclockwise (left hand) as viewed from the driver, looking at the pump shaft.

3910-11th IOM 5/08 13

Page 14

NAMEPLATE INFORMATION

Every pump has a Goulds nameplate that provides information about the pump. The nameplate is located on the pump casing.

Special tags which provide additional information (mechanical seal data, etc.) and special tagging required by customers are located on the pump casing or on the bearing frame.

The standard nameplate provides information about the pump’s size, rating, bearings, serial number, hydrostatic test pressure of pressure containment parts, maximum allowable working pressure at designated temperature and construction / customer’s item number. Rating and hydrostatic test pressure are expressed in English units. Note the format of pump size: Discharge x Suction Nominal Impeller Diameter in inches, for example, 2x3-13 (Fig. 1A).

The standard nameplate is also available in a version which expresses the rating and hydrostatic test pressure in metric units (Fig. 1B).

When ordering spare parts you will need to identify pump model, size, serial number, and the item number of required parts. Pump information can be taken from the Goulds nameplate. Item numbers can be found in this manual.

Fig. 1A

If applicable, your pump unit may have the ATEX tag affixed to the pump and/or baseplate (Fig. 2). See the Safety section for a description of the symbols and codes.

Fig. 1B

Fig. 2

14 3910-11th IOM 5/08

Page 15

RECEIVING THE PUMP

Inspect the pump as soon as it is received. Carefully check that everything is in good order. Make notes of damaged or missing items on the receipt and freight bill. File any claims with the transportation company as soon as possible.

STORAGE REQUIREMENTS

Short Term (Less than 6 months) Goulds normalpackaging

procedure is designed to protect the pump during shipping. Upon receipt, store in a covered and dry location.

Long Term (More than 6 months) Preservative treatment of bearings and machined surfaces will be required. Rotate shaft several times every 3 months. Refer to driver and coupling manufacturers for their long term storage procedures. Store in a covered and dry location.

NOTE: Long term storage treatment may be purchased with initial pump order.

HANDLING

! WARNING

Pump and components are heavy. Failure to properly lift and support equipment could result in serious physical injury, or damage to pumps.

Use care when moving pumps. Lifting equipment must be able to adequately support the entire assembly. Hoist bare pump using suitable hooks through the holes in the frame mounted support or suitable slings through the large openings in the casing mounted support (Fig. 3).

Fig. 4

Or with hooks through the holes in the frame mounted support or with slings through the large openings in the casing mounted support.

Fig. 3

! WARNING

Units with drivers mounted are moved with slings under the pump casing and driver (Figs. 4 and 5).

3910-11th IOM 5/08 15

Units with drivers mounted can be top heavy. Driver weight could cause the assembled unit to overturn and could result in serious physical injury, or damage to pumps.

Fig. 5

Page 16

16 3910-11th IOM 5/08

Page 17

INSTALLATION

GENERAL..................................17

SITE/FOUNDATION............................17

ALIGNMENT AND ALIGNMENT CRITERIA .............18

General Considerations..........................18

Alignment Criteria ............................18

ALIGNMENT TROUBLESHOOTING ..................18

PIPING....................................19

Suction Piping ..............................19

Discharge Piping .............................20

Bypass Piping ..............................20

Auxiliary Piping .............................20

Final Piping Check ............................20

Equipment that will operate in a potentially explosive environment must be installed in accordance with the

following instructions.

GENERAL

Procedures for installation described within this section are general in nature. It is assumed that the installer has a basic knowledge of acceptable methods. More detailed procedures are described in various publications,

SITE/FOUNDATION

A pump should be located near the supply of liquid and have adequate space for operation, maintenance, and inspection. Be sure to allow for crane or hoist service.

Model 3910 in-line pumps are designed to be mounted directly in the piping. The pump casing has a flat base which may be mounted on a concrete foundation which has been poured on a solid footing.

including API Recommended Practice 686/ PIP (Process Industry Practices) REIE 686, “Recommended Practices for Machinery Installation and Installation Design.”

Optional casing supports, which provide additional stability, are also available (Fig. 7).

Fig. 7

If it is intended that the piping support the pumping unit, piping supports should be properly designed to accommodate the weight of the pumping unit.

Fig. 6

The foundation must be able to absorb any vibration and to form a permanent, rigid support for the pumping unit (Fig. 6). Goulds recommends this mounting method.

3910-11th IOM 5/08 17

All equipment being installed must be properly

grounded to prevent unexpected static electric discharge.

Page 18

ALIGNMENT AND ALIGNMENT CRITERIA

Alignment procedures must be followed to prevent

unintended contact of rotating parts. Follow coupling manufacturer's installation and operation procedures.

GENERAL CONSIDERATIONS

! 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.

To remove coupling guard, refer to coupling guard installation and disassembly instructions in Appendix I.

The times at which alignment is checked and adjusted are:

Initial Alignment (Cold Alignment) is done prior to operation when the pump and the driver are at ambient temperatures.

Final Alignment (Hot Alignment) is done after operation when the pump and driver are at operating temperatures.

After First Run - To obtain correct alignment when

•

both pump and driver are at operating temperature. Thereafter, alignment should be checked periodically in accordance with plant operating procedures.

NOTE: Alignment check must be made if process temperature changes, piping changes and/or pump service is performed.

Alignment is achieved by adding or removing shims from under the flange of the driver and/or shifting driver horizontally as needed.

NOTE: Proper alignment is the responsibility of the installer and user of the unit.

Accurate alignment of the equipment must be attained. Trouble-free operation can be accomplished by achieving alignment within the levels specified in the following section.

Three common alignment methods are utilized:

Reverse Dial Indicator method is most common.

•

Laser method is similar to reverse dial indicator

•

method, but uses a laser to obtain the necessary measurements.

Dial Indicator (rim-and-face) method.

•

Follow alignment equipment manufacturer's procedures when utilizing reverse dial indicator or laser methods. A detailed procedure for alignment using the dial indicator (rim-and-face) method is included as Appendix II.

ALIGNMENT CRITERIA

Good alignment is attained when readings as specified in this section have been achieved with pump and driver at operating temperatures (final alignment).

Table 2 shows maximum allowable Total Indicator Reading (T.I.R.) for parallel and angular misalignment.

Table 2

Maximum Allowable

Parallel and Angular Misalignment

Maximum Allowable Misalignment

Group

All

Parallel Angular

0.05 mm

(.002 in.)

[0.125 mm/cm (.0005 in. /in.)

0.03 degrees

of coupling face diameter]

ALIGNMENT TROUBLESHOOTING

Problem Probable Cause Remedy

Cannot obtain horizontal (Side-to-Side) alignment, angular or parallel

Driver flange bolt bound

18 3910-11th IOM 5/08

Loosen motor support hold down bolts and slide motor support and driver until horizontal alignment is achieved.

Page 19

PIPING

Guidelines for piping are given in the “Hydraulic Institute Standards,” available from:

Hydraulic Institute 9 Sylvan Way Parsippany, NJ 07054

and in API RP 686, and must be reviewed prior to pump installation.

! WARNING

Never draw piping into place by forcing at the flanged connections of the pump. This may impose dangerous strains on the unit and cause misalignment between pump and driver. Pipe strain will adversely affect the operation of the pump resulting in physical injury and damage to the equipment.

Flange loads from the piping system, including

those from thermal expansion of the piping, must not exceed the limits of the pump. Casing deformation can result in contact with rotating parts which can result in excess heat generation, sparks and premature failure.

1. Piping runs should be as short as possible to minimize friction losses.

2. It is suggested that expansion loops be properly designed and installed in suction and/or discharge lines when handling liquids at elevated tempera- tures, so thermal expansion of piping will not draw pump out of alignment.

3. The piping should be arranged to allow pump flushing prior to removal of the unit on services handling hazardous liquids.

4. Carefully clean all pipe parts, valves and fittings, and pump branches prior to assembly.

5. All piping must be supported independently of, and line up naturally with, the pump flanges. Table 2 shows piping flange alignment criteria.

Bottom of casing should be supported by a solid

6. foundation or casing feet should be used.

SUCTION PIPING

NPSHAmust always exceed NPSHRas shown on Goulds performance curves received with order. (Reference Hydraulic Institute for NPSH and pipe friction values needed to evaluate suction piping).

Properly designed and installed suction piping is a necessity for trouble-free pump operation. Suction piping should be flushed BEFORE connection to the pump.

1. Use of elbows close to the pump suction flange should be avoided. There should be a minimum of two (2) pipe diameters of straight pipe [five (5) pipe diameters is preferred] between the elbow and suction inlet. Where used, elbows should be long radius.

2. Use suction pipe one (1) or two (2) sizes larger than the pump suction, with a reducer at the suction flange. Suction piping should never be of smaller diameter than the pump suction.

3. Reducers, if used, should be eccentric and located at the pump suction flange with sloping side down.

Pump must never be throttled on suction side.

4. A suction screen should be installed prior to initial start-up and when suction system has been opened for work. The screen should be of the cone type with a net area equal to at least three (3) times the cross sectional area of the suction pipe. The mesh of the screen should be sized to prevent particles larger than

1.6 mm (1/16 in.) from entering the pump and should be installed in a spool piece to allow removal for cleaning. The screen should remain in the system until periodic inspection shows system is clean.

CAUTION

Table 4

Piping Flange Alignment

5. Separate suction lines are recommended when more than one pump is operating from the same source of supply.

Type Criteria

Axial

Parallel

Concentric Flange bolts should easily install by hand.

In no case should loads on the pump flanges exceed the

limits stated in API Standard 610, 11th Edition (ISO

13709).

3910-11th IOM 5/08 19

Flange gasket thickness ± 0.8 mm (.03 in.).

0.001 mm/mm (.001 in./in.) of flange diameter to a maximum of 0.8 mm (.03 in.).

Suction Lift Conditions

1. Suction pipe must be free from air pockets.

2. Suction piping must slope upwards to pump.

3. All joints must be air tight.

4. A means of priming the pump must be provided.

Page 20

Suction Head/Flooded Suction Conditions

1. An isolation valve should be installed in the suction line at least two (2) pipe diameters from the pump suction to permit closing of the line for pump inspection and maintenance.

2. Keep suction pipe free from air pockets.

3. Piping should be level or slope gradually downward from the source of supply.

4. No portion of the piping should extend below pump suction flange.

5. The size of entrance from supply should be one (1) or two (2) sizes larger than the suction pipe.

6. The suction pipe must be adequately submerged below the liquid surface to prevent vortices and air entrainment at the supply.

DISCHARGE PIPING

Properly designed and installed discharge piping is a necessity for trouble-free pump operation. Discharge piping should be flushed BEFORE connection to the pump.

1. Isolation and check valves should be installed in discharge line. Locate the check valve between isolation valve and pump; this will permit inspection of the check valve. The isolation valve is required for priming, regulation of flow, and for inspection and maintenance of pump. The check valve prevents pump or seal damage due to reverse flow through the pump when the driver is turned off.

2. Increasers, if used, should be placed between pump and check valves.

3. Cushioning devices should be used to protect the pump from surges and water hammer if quick-closing valves are installed in system.

BYPASS PIPING

Systems that require operation at reduced flows for prolonged periods should be provided with a bypass line connected from the discharge side (before any valves) to the source of suction.

A minimum flow orifice can be sized and installed in bypass line to preclude bypassing excessive flows. Consult nearest sales office or factory for assistance in sizing orifice.

An automatic recirculation control valve and/or solenoid operated valve should be considered if a constant bypass (i.e. orifice) is not possible.

AUXILIARY PIPING

The mechanical seal must have an appropriate seal

flush system. Failure to do so will result in excess heat generation and seal failure.

Cooling systems such as those for bearing

lubrication, mechanical seal systems, etc., where provided, must be operating properly to prevent excess heat generation, sparks, and premature failure.

Sealing systems that are not self purging or self

venting, such as plan 23, require manual venting prior to operation. Failure to do so will result in excess heat generation and seal failure.

Auxiliary piping may be required for seal chamber cover cooling, mechanical seal flush or other special features supplied with the pump. Consult pump data sheet for specific auxiliary piping recommendations.

If seal chamber cover cooling is required, follow guidelines listed below.

1. Flows of 4 l/min. (1 GPM) will generally satisfy cooling requirements.

2. Cooling water pressure should not exceed

7.0 kg/cm

(100 psig).

FINAL PIPING CHECK

After connecting the piping to pump:

The Preventive Maintenance section must be

adhered to in order to keep the applicable ATEX classification of the equipment. Failure to follow these procedures will void the ATEX classification for the equipment.

Check alignment, per alignment criteria outlined

previously, to determine if pipe strain has affected alignment. If pipe strain exists, correct piping.

20 3910-11th IOM 5/08

Page 21

OPERATION

PREPARATION FOR START-UP ....................21

Checking Rotation ............................21

Coupling Pump and Driver ........................21

Lubricating Bearings ...........................22

Shaft Sealing ...............................22

Priming Pump ..............................22

Start-up Precautions ...........................23

STARTING PUMP .............................24

OPERATION ................................24

General Considerations..........................24

Operational Checks............................24

Operating at Reduced Capacity .....................25

Operating Under Freezing Conditions ..................25

SHUTDOWN ................................25

FINAL ALIGNMENT ...........................25

PREPARATION FOR START-UP

When installation in a potentially explosive

environment, ensure that the motor is properly certified.

CHECKING ROTATION

Serious damage may result if pump is run in the wrong rotation.

1. Lock out power to driver.

! WARNING

Lock out driver power to prevent accidental start-up and physical injury.

2. Make sure coupling hubs are securely fastened to shafts.

! WARNING

Do NOT jog a coupled pump.

NOTE: Pump is shipped with coupling spacer removed.

3. Unlock driver power.

4. Make sure everyone is clear. Jog driver just long enough to determine direction of rotation. Rotation must correspond to arrow on bearing frame.

CAUTION

5. Lock out power to driver.

COUPLING PUMP AND DRIVER

! WARNING

Lock out driver power to prevent accidental rotation and physical injury.

The coupling used in an ATEX classified environ-

ment must be properly certified.

1. Install and lubricate coupling per manufacturer’s instructions.

The coupling guard used in an ATEX classified

environment must be constructed from a nonsparking material.

2. Install coupling guard. Refer to coupling guard installation instructions in Appendix I.

! WARNING

Never operate a pump without coupling guard properly installed. Refer to Appendix I for coupling guard installation instructions. Personal injury will occur if pump is run without coupling guard.

3910-11th IOM 5/08 21

Page 22

LUBRICATING BEARINGS

Bearings musts be lubricated properly in order to

prevent excess heat generation, sparks and premature failure.

Grease Lubrication

Greased lubricated ball bearings are standard on the Model 3910 units.

Sealing systems that are not self purging or self

venting, such as plan 23, require manual venting prior to operation. Failure to do so will result in excess heat generation and seal failure.

For satisfactory operation, there must be a liquid film between seal faces to lubricate them. Refer to seal manufacturer’s drawing for location of taps. Some methods which may be used to flush/cool the seal are:

The bearings are greased at the factory.

See Preventive Maintenance section for lubrication recommendations.

Pure Oil Mist Lubrication

Pure oil mist is an optional feature for the Model 3910. Follow oil mist generator manufacturer’s instructions. The inlet and outlet connections are located on the side of the bearing frame.

See Preventive Maintenance section for lubrication recommendations and connection locations.

! WARNING

Operation of the unit without proper lubrication will cause bearing failure and pump seizure.

SHAFT SEALING WITH MECHANICAL SEAL

The mechanical seal used in an ATEX classified

environment must be properly certified.

Pumps may be shipped with or without mechanical seal installed. Cartridge type mechanical seals are commonly used for this model. Cartridge seals are preset at the seal manufacturer’s facility and require no field settings. Cartridge seals installed by the user require disengagement of the holding clips prior to operation, allowing the seal to slide into place. If the seal has been installed in the pump by Goulds, these clips have already been disengaged. For other types of mechanical seals, refer to the seal manufacturer’s instructions for installation and setting.

Product Flushing - In this arrangement, the pumpage is

•

piped from the casing (and cooled in an external heat exchanger when required) then injected into seal chamber.

External Flush - A clean, cool compatible liquid is

•

injected from an outside source directly into seal chamber. Flushing liquid must be at a pressure 0.35-1.05

kg/cm rate should be 2-8 l/min. (

Other methods may be used which make use of multiple

•

gland connections and/or seal chamber connections. Refer to documentation supplied with the pump, mechanical seal reference drawing, and piping diagrams.

(5-15 psi) greater than seal chamber pressure. Injection

-2 GPM).

PRIMING PUMP

Pumps must be fully primed at all times during

operation.

Never start the pump until it has been properly primed. Several different methods of priming can be used, depending upon type of installation and service involved.

Suction Supply Above Pump

1. Slowly open the suction valve (Fig. 8).

Connection of Sealing Liquid

The mechanical seal must have an appropriate seal

flush system. Failure to do so will result in excess heat generation and seal failure.

Cooling systems such as those for bearing

lubrication, mechanical seal systems, etc., where provided, must be operating properly to prevent excess heat generation, sparks, and premature failure.

2. Open air vents on the suction and discharge piping, casing, seal chamber, and seal piping, if provided, until all air is vented and only liquid flows out.

3. Close the vents.

22 3910-11th IOM 5/08

Fig. 8

Page 23

Suction Supply Below Pump

A foot valve and outside source of liquid may be used to prime the pump. Outside source of liquid can come from a priming pump pressurized discharge line, or other supply (Fig. 9 and 10).

1. Close discharge valve and open air vents in suction and discharge piping, casing, seal chamber, and seal piping, if provided.

2. Open valve in outside supply line until all air is vented and only liquid flows out.

! WARNING

When handling hazardous and/or toxic fluids, proper personal protective equipment is required. If pump is being drained, precautions must be taken to prevent physical injury. Pumpage must be handled and disposed of in conformance with applicable regulations.

3. Close the vents and then the outside supply line.

Other Methods of Priming Pump

Priming by ejector.

•

Fig. 9

Priming by automatic priming pump.

•

START-UP PRECAUTIONS

Ensure that pump and systems are free of foreign

objects before operating and that objects cannot enter the pump during operation. Foreign objects in the pumpage or piping system can cause blockage of flow which can result in excess heat generation, sparks, and premature failure.

A build up of gases within the pump, sealing system

and or process piping system may result in an explosive environment within the pump or process piping system. Ensure process piping system, pump, and sealing system are properly vented prior to operation.

1. All equipment and personal safety related devices and controls must be installed and operating properly.

2. To prevent premature pump failure at initial start-up due to dirt or debris in the pipe system, ensure the pump can be run continuously at full speed and flow for 2 to 3 hours.

CAUTION

3. Variable speed drivers should be brought to rated

Fig. 10

3910-11th IOM 5/08 23

speed as quickly as possible.

4. Variable speed drivers should not be adjusted or checked for speed governor or overspeed trip settings while coupled to the pump at initial start-up. If settings have not been verified, uncouple the unit and refer to driver manufacturer’s instructions for assistance.

Page 24

5. Running a new or rebuilt pump at slow speeds may not provide enough flow to adequately flush and cool the wear ring and seal chamber cover bushing.

6. Pumpage temperatures in excess of 93° C (200° F) will require warm-up of pump prior to operation. Circulate a small amount of pumpage through the pump until the

STARTING PUMP

casing temperature is within 56° C (100° F) of the pumpage temperature and evenly heated.

NOTE: Warm-up rate should not exceed 1.4° C (2.5° F) per minute.

1. Make sure suction valve and any recirculation or cooling lines are open.

2. Fully close or partially open discharge valve as dictated by system conditions.

3. Start driver.

Immediately observe pressure gauges. If discharge pressure is not quickly attained, stop driver, reprime, and attempt to restart.

CAUTION

OPERATION

GENERAL CONSIDERATIONS

Always vary capacity with regulating valve in the discharge line. NEVER throttle flow from the suction side.

Driver may overload if the pumpage specific gravity (density) is greater than originally assumed, or the rated flow rate is exceeded.

Always operate the pump at or near the rated conditions to prevent damage resulting from cavitation or recirculation.

OPERATIONAL CHECKS

The following are minimum operational checks for the pump only. Consult driver and auxiliary equipment manufacturers’ literature for additional information.

1. On grease lubricated units, remove grease relief plugs to verify that grease is present. Replace plugs.

2. On pure oil mist lubricated units, remove viewing port plugs and assure oil mist is flowing properly. Replace plugs.

CAUTION

4. Slowly open discharge valve until the desired flow is obtained.

CAUTION

Observe pump for vibration levels, bearing temperature, and excessive noise. If normal levels are exceeded, shut down and resolve.

3. Check bearing temperatures using a pyrometer or other accurate temperature measuring device. Monitor bearing temperature frequently during initial operation to determine if a bearing problem exists as well as to establish normal bearing operating temperature.

4. On units equipped with auxiliary piping, assure that proper flows have been established and that equipment is operating properly.

5. Establish baseline vibration readings to determine normal running conditions. If it is determined that the unit is running rough, consult factory.

6. Monitor all gauges to ensure pump is running at or near rating and that suction screen (when used) is not clogged.

OPERATING AT REDUCED CAPACITY

! WARNING

Do NOT operate pump below minimum rated flows or with 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.

24 3910-11th IOM 5/08

Page 25

Damage occurs from:

1. Increased vibration levels - Affects bearings, seal chambers, and mechanical seals.

2. Increased radial load - Increases stress on shaft and bearings.

3. Heat build up - Vaporization causes rotating parts to score or seize.

4. Cavitation - Increases damage to internal surfaces of pump.

CAUTION

SHUTDOWN

1. Slowly close discharge valve.

2. Shut down and lock out driver to prevent accidental rotation.

OPERATING UNDER FREEZING CONDITIONS

Exposure to freezing conditions while pump is idle could cause liquid to freeze and damage the pump.

Liquid inside pump should be drained. Liquid inside auxiliary piping, if supplied, should also be drained.

! WARNING

FINAL ALIGNMENT

Alignment procedures must be followed to prevent

unintended contact of rotating parts. Follow coupling manufacturer’s installation and operation procedures.

1. Run the unit under actual operating conditions for a sufficient length of time to bring the pump and driver and associated systems to operating temperature.

2. Shut down and lock out driver as described above.

! 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.

3. Remove coupling guard. Refer to coupling guard installation and disassembly instructions in Appendix I.

4. Check alignment while unit is still hot per alignment criteria in the Installation section.

5. Reinstall coupling guard. Refer to coupling guard installation and disassembly instructions in Appendix I.

3910-11th IOM 5/08 25

Page 26

26 3910-11th IOM 5/08

Page 27

PREVENTIVE MAINTENANCE

GENERAL COMMENTS .........................27

MAINTENANCE SCHEDULE ......................27

Routine Maintenance ...........................27

Routine Inspections............................27

3 Month Inspections ...........................27

Annual Inspections ............................27

Inspection Intervals............................28

MAINTENANCE OF BEARINGS ....................28

Grease Lubricated Bearings .......................28

Pure Oil Mist Lubricated Bearings (Optional) ..............28

MAINTENANCE OF SHAFT SEALS ..................29

TROUBLESHOOTING ..........................30

GENERAL COMMENTS

A routine maintenance program can extend the life of your pump. Well maintained equipment will last longer and require fewer repairs. You should keep maintenance records as this will help pinpoint potential causes of problems.

The Preventive Maintenance section must be adhered to in order to keep the applicable ATEX classification of the

equipment. Failure to follow these procedures will void the ATEX classification for the equipment.

MAINTENANCE SCHEDULE

ROUTINE MAINTENANCE

Bearing lubrication

•

Seal monitoring

•

Vibration analysis

•

Discharge pressure monitoring

•

Temperature monitoring

•

ROUTINE INSPECTIONS

3 MONTH INSPECTIONS

Check foundation.

•

If pump has been left idle, check mechanical seal.

•

Repair or replace if required.

Pump should be re-greased at least every 3 months

•

(2000 hours) or more often if there are any adverse atmospheric conditions or other conditions which might contaminate or break down the grease.

Check shaft alignment and realign if required.

•

Check for unusual noise, vibration and bearing

•

temperatures.

Inspect pump and piping for leaks.

•

Check seal chamber for leakage.

•

3910-11th IOM 5/08 27

ANNUAL INSPECTIONS

Check pump capacity, pressure and power. If pump

•

performance does not satisfy your process requirements, and process requirements have not changed, pump should be disassembled, inspected, and worn parts should be replaced. Otherwise, a system inspection should be done.

Page 28

INSPECTION INTERVALS

Inspection intervals should be shortened appropriately

•

if the pumpage is abrasive and/or corrosive,

or if the enviornment is classified as potentially

explosive.

MAINTENANCE OF BEARINGS

Do not insulate bearing housings as this can result

in excess heat generation, sparks, and premature failure.

Service temperature in an ATEX classified environ-

ment is limited to the area classification specified on the ATEX tag affixed to the pump (reference Table 1 in the Safety section for ATEX classifications).

GREASE LUBRICATED BEARINGS

Grease lubricated bearings are pre-lubricated at the factory. Regrease bearings every 2000 operating hours or

3 months, whichever occurs first.

NOTE: The bearing temperature usually rises after regreasing due to an excess supply of grease. Temperatures will return to normal after pump has run and purged the excess from the bearings, usually two to four hours. Grease relief plugs should be removed during this period, and replaced when temperature has stabilized.

For most operating conditions a lithium based mineral oil grease of NLGI consistency number 2 is recommended. This grease is acceptable for bearing temperatures of -15°C to 110°C (5°F ro 230°F).

Bearing temperatures are generally about 20°F (18°C) higher than bearing housing outer surface temperature.

Regrease Procedure

NOTE: When regreasing there is danger of impurities entering the bearing housing. The grease container, the greasing device, and fittings must be clean.

1. Wipe dirt from both grease fittings (Fig. 11).

2. Remove two grease relief plugs from side of frame opposite grease fittings.

3. Fill both grease cavities through grease fittings with recommended grease until fresh grease comes out of the relief holes. Reinstall grease relief plugs until immediately prior to starting pump.

Some acceptable greases are:

NLGI Consistency 2

Exxon Unirex N2

Mobil Mobilux EP2

Sunoco Multipurpose EP

SKF LGMT 2

! CAUTION

Never mix greases of different consistency (NLGI 1 or 3 with NLGI 2) or different thickener. For example, never mix a lithium base grease with a polyurea base grease.

NOTE: If it is necessary to change grease type or consistency, the pump must be disassembled and the old grease removed from the bearings.

PURE OIL MIST LUBRICATED BEARINGS (OPTIONAL)

! WARNING

Pumps are shipped without oil. Oil mist lubricated bearings must be lubricated at the job site.

1. Follow oil mist system supplier’s instructions.

Fig. 11

2. Connect oil mist supply lines to upper and center tapped connection.

28 3910-11th IOM 5/08

Page 29

3. Connect drain line to bottom tapped connection (Fig. 12).

Oil mist lubrication is required above pumpage temperature of 232°C (450°F), but may be used at lower temperature.

Fig. 12

A high quality turbine oil with rust and oxidation inhibitors should be used. For the majority of operational conditions, bearing temperatures will run between 50°C (120°F) and 82°C (180°F). In this range, an oil of ISO viscosity grade 68 at 40°C (100°F) is recommended. If bearing temperatures exceed 82°C (180°F), use ISO viscosity grade 100.

Some acceptable oils are:

Exxon Teresstic EP68

Mobil Mobil DTE 26 300 SSU

@ 40°C (100°F)

Sunoco Sunvis 968

Royal Purpal SYNFILM ISO VG 68

Synthetic Lube

MAINTENANCE OF SHAFT SEALS

The mechanical seal used in an ATEX classified

environment must be properly certified.

When mechanical seals are furnished by Goulds, a manufacturer’s reference drawing is supplied with the data package. This drawing should be kept for future use when performing maintenance and adjusting the seal. The seal drawing will also specify required flush liquid and attachment points. The seal and all flush piping must be checked and installed as needed prior to starting the pump.

The life of a mechanical seal depends on various factors such as cleanliness of the liquid handled and its lubricating properties. Due to the diversity of operating conditions it is, however, not possible to give definite indications as to its life.

! WARNING

NEVER operate the pump without liquid supplied to the 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.

The mechanical seal must have an appropriate seal

flush system. Failure to do so will result in excess heat generation and seal failure.

Cooling systems such as those for bearing

lubrication, mechanical seal systems, etc., where provided, must be operating properly to prevent excess heat generation, sparks and premature failure.

Sealing systems that are not self purging or self

venting, such as plan 23, require manual venting prior to operation. Failure to do so will result in excess heat generation and seal failure.

3910-11th IOM 5/08 29

Page 30

TROUBLESHOOTING

Problem Probable Cause Remedy

Check that pump and suction line are full of liquid. Reprime pump.

Consult factory for proper depth. Use baffle to eliminate vort ices.

Ensure that suction line shutoff valve is fully open and line is unobstructed. Increase suction head.

Change rotation to concur with direction indicated by arrow on bearing frame.

Assure uniform contact of pump and/or supports with foundation.

Anchor per Hydraulic Institute Standards/ API RP 686 recommendations.

Consult factory. Install throttle valve. Cut impeller.

No liquid delivered.

Pump not producing rated flow or head.

Pump starts then stops pumping.

Bearings run hot.

Pump is noisy or vibrates.

Excessive leakage from stuffing box.

Motor requires excessive power.

Pump not primed.

Suction line clogged. Remove obstructions. Impeller clogged with foreign material. Back flush pump to clean impeller. Foot valve or suction pipe opening not

sufficiently submerged. Suction lift too high. Reduce suction lift. Air leak thru gasket. Replace gasket. Air leak thru seal chamber. Replace or readjust mechanical seal. Impeller partly clogged. Back flush pump to clean impeller. Worn wear rings. Replace defective part as required.

Insufficient suction head.

Worn or broken impeller. Inspect and replace if necessary.

Wrong direction of rotation.

Improperly primed pump. Reprime pump. Air or vapor pockets in suction line. Rearrange piping to eliminate air pockets. Air leak in suction line. Repair (plug) leak. Improper alignment. Re-align pump and driver. Improper lubrication. Check lubricant for suitability and quantity. Insufficient cooling liquid. Check cooling system. Improper pump/driver alignment. Align shafts. Partly clogged impeller causing imbalance. Backflush pump to clean impeller. Broken or bent impeller or shaft. Replace as required. Impeller out of balance. Balance impeller.

Foundation not rigid.

Worn bearings. Replace. Suction or discharge piping not anchored or properly

supported. Pump is cavitating. Locate and correct system problem. Worn mechanical seal parts. Replace mechanical seal. Overheating mechanical seal. Check lubrication and cooling lines.

Head lower than rating. Pumps too much liquid.

Liquid heavier than expected. Check specific gravity and viscosity. Rotating parts bind. Check internal wear parts for proper clearances.

30 3910-11th IOM 5/08

Page 31

DISASSEMBLY & REASSEMBLY

REQUIRED TOOLS ............................31

DISASSEMBLY...............................31

INSPECTIONS ...............................36

RENEWAL OF WEAR PARTS ......................41

REASSEMBLY ...............................44

ASSEMBLY TROUBLESHOOTING ...................54

REQUIRED TOOL

Open end wrenches

•

Lifting sling

•

Induction bearing heater

•

Brass drift punch

•

Spanner wrench

•

Allen wrenches

•

Torque wrench with sockets

•

Dial indicator

•

Micrometers (inside and outside)

•

Cleaning agents

•

Feeler gauges

•

DISASSEMBLY

! WARNING

Pump components are heavy. Proper methods of lifting and securing must be employed to avoid physical injury and/or equipment damage.

! WARNING

The Model 3910 may handle hazardous and/or toxic fluids. Proper personal protection is required. Precautions must be taken to prevent physical injury. Pumpage must be handled and disposed of in conformance with applicable regulations.

NOTE: Before disassembling the pump for overhaul, ensure all replacement parts are available.

Drill

•

Tap

•

Spanning type puller

•

Soft face hammer

•

Press

•

PREPARATION FOR DISASSEMBLY

1. Shut off all valves controlling flow to and from pump.

! WARNING

Operator must be aware of pumpage and safety precautions to prevent physical injury.

2. Drain liquid from piping; flush pump if necessary.

3. Disconnect all auxiliary piping, tubing and equipment that will interfere with removal of back pull-out assembly.

4. Remove coupling guard. Refer to coupling guard installation and disassembly instructions in Appendix I.

5. Remove coupling spacer. Follow coupling manufacturer’s instructions for assistance.

! WARNING

Lock out power supply to driver to prevent accidental startup and physical injury.

3910-11th IOM 5/08 31

Page 32

REMOVAL OF BACK PULL-OUT ASSEMBLY

1. Loosen and remove casing stud nuts (425).

2. Separate back pull-out assembly from casing (100) by tightening jacking bolts (418) provided. Tighten jacking bolts evenly using alternating pattern (Fig. 13).

NOTE: Penetrating oil may be used if seal chamber cover to casing joint is excessively corroded.

Fig 14

3. Pull impeller (101) from shaft (122). Use a spanning type puller if required.

Fig. 13

3. Remove back pull-out assembly using Goulds back pull-out device or other suitable means. Refer to instructions in Appendix III.

! WARNING

Pump components are heavy. Proper methods of lifting and securing must be employed to avoid physical injury and/or equipment damage.

4. Remove and discard casing gasket (351). (Replace this with new gasket during reassembly.)

5. Secure to prevent movement during transport. Transport back pull-out assembly to a clean work area for further disassembly.

6. Support and secure back pull-out assembly firmly to workbench.

REMOVAL OF IMPELLER

1. Loosen set screw (198A) in end of impeller nut (304) (Fig. 14).

2. Loosen and remove impeller nut (304).

NOTE: Impeller nut has LEFT HAND threads.

When handling the impeller, wear heavy work gloves to prevent cutting hands on sharp edges.

4. Remove impeller key (178).

CAUTION

REMOVAL OF COUPLING HUB

1. Blue and scribe shaft (122) for relocating coupling hub during reassembly (Fig. 15).

2. Remove coupling hub.

Fig. 15

REMOVAL OF SEAL CHAMBER COVER

1. Loosen and remove gland stud nuts (355 )(Fig. 16).

2. Slide cartridge mechanical seal away from seal chamber cover (184).

3. Install eyebolt in tapped hole provided in seal chamber cover (184).

4. Rig lifting sling to eyebolt and to overhead lifting device. Take light strain on sling.

32 3910-11th IOM 5/08

Page 33

5. Loosen and remove seal chamber cover/bearing frame bolts (370H).

6. Separate seal chamber cover (184) from bearing frame (228) by tapping on cover flange with a hardwood block or a soft face hammer.

7. Guide seal chamber cover (184) over end of shaft (122) once cover releases from bearing frame (228).

Cartridge mechanical seal may be damaged if cover is allowed to come in contact with it.

8. Loosen set screws and remove cartridge mechanical seal from shaft (122).

9. Remove and discard mechanical seal O-ring or gland gasket (360Q). (Replace this with a new O-ring or gasket during reassembly.)

CAUTION

REMOVAL OF OPTIONAL WATER JACKET COVER

1. Suspend seal chamber cover (184) from lifting sling, or firmly support seal chamber cover in a vertical position such that one water jacket connection is on the top and the other is on the bottom.

! WARNING

Seal chamber cover must be adequately supported so that it cannot fall. Personal injury and/or damage to equipment could occur.

2. Introduce water slowly into the bottom connection until all air is vented and only water comes out of the top connection.

! WARNING

All air must be vented from water jacket. If all air is not vented, it can cause water jacket cover (490) to be propelled from its fit in the seal chamber cover (184). Personal injury and/or damage to equipment could occur.

3. Stop introduction of water into water jacket.

4. Seal top connection with plug or other suitable means.

5. Slowly increase water pressure on inlet (bottom) connection. Water jacket cover (490) should be forced from its fit in the seal chamber cover (184). Be prepared to catch water jacket cover.

Do not exceed 7.0 kg/cm2(100 psig) pressure in water jacket.

6. Remove and discard outer and inner water jacket cover O-rings (412S and 497T, respectively) from grooves in water jacket cover (490). (Replace these with new O-rings during reassembly.)

CAUTION

Fig. 16

3910-11th IOM 5/08 33

Page 34

DISASSEMBLY OF STANDARD GREASE LUBRICATED POWER END

This section covers disassembly of standard ring oil or optional purge oil mist lubricated power end. For power ends with optional features (pure oil mist lubrication, bearing cooling, etc.), refer to the appropriate section.

1. Loosen and remove thrust bearing end cover/bearing frame screws (370N).

2. Pry thrust bearing end cover (109A)/INPRO (123A) with O-ring (412, not shown) out of bearing frame (228). SA thrust bearing end cover is sealed to the bearing frame with a gasket (360A) (Fig. 17).

Fig. 17

3. Remove and discard thrust bearing end cover shims (390C). Replace with new shims during reassembly. (Not applicable to pumps with SA bearing frame.)

4. Withdraw shaft/bearing assembly carefully from bearing frame (228).

Do NOT remove bearings from shaft unless they are to be replaced.

5. Bend locking tang of thrust bearing lockwasher (382) from notch in bearing locknut (136) (Fig. 18).

NOTE: Save bearings for inspection.

6. Loosen and remove thrust bearing locknut (136) and lockwasher (382).

7. Press or pull duplex thrust bearing (112) from shaft (122).

8. Remove grease shelf (253) from shaft (122).

9. Press or pull radial bearing (168) from shaft (122).

NOTE: Save bearing for inspection.

10. Loosen and remove radial bearing end cover / bearing frame screws (370P) (Fig. 19). Omit this step on SA pumps. Radial INPRO Oil Seal (123) is pressed in place and sealed with an O-ring (Fig. 20).

11. Remove radial bearing end cover (119A)/ Radial INPRO (123) with gasket (360) or Radial INPRO (123) (SA pump only) from bearing frame (228) by tapping out of fit in frame.

CAUTION

34 3910-11th IOM 5/08

Fig. 18

Page 35

Fig. 19

Fig. 20

12. Remove and discard radial bearing end cover gasket (360). (Replace this with a new gasket during reassembly.)

13. Press Radial and Thrust INPRO (123 & 123A) out of radial (N/A on SA pumps) and Thrust End Covers (119A & 109A).

DISASSEMBLY OF OPTIONAL PURE OIL MIST LUBRICATED POWER END

Pure oil mist lubricated power ends are disassembled in the same manner as grease lubricated power ends. Grease shelf (253) is not furnished with pure oil mist lubrication. Disregard any reference to this part.

DISASSEMBLY OF POWER END WITH OPTIONAL RADIAL HEAT FLINGER

The radial heat flinger (123B) replaces the standard radial INPRO (123) and is removed in the same manner except 3 set screws (222) need to be loosened (Fig. 21). Remove and discard frame / seal chamber cover thermal gasket (540C) (Fig. 16). (Replace this with a new gasket during reassembly. Remainder of disassembly is the same as grease lubrication.

DISASSEMBLY OF POWER END WITH OPTIONAL AIR COOLING PACKAGE

1. Loosen radial heat flinger set screw (222) (Fig. 21).

2. Loosen thrust fan set screw (222). SA pumps thrust fan sits on coupling diameter.

3. Slide thrust fan (123E) off shaft (122).

4. Loosen and remove thrust bearing end cover/bearing frame screws (370N).

5. Remove thrust fan guard support (234D).

Remainder of disassembly is the same as steps 2-13 of grease lubrication section.

FINAL DISASSEMBLY

Remove any remaining plugs and fittings.

Fig. 21

3910-11th IOM 5/08 35

Page 36

INSPECTIONS

Model 3910 parts must be inspected to the following criteria before they are reassembled to ensure the pump will run properly. Any part not meeting the required criteria should be replaced.

NOTE: Clean parts to remove oil, grease or dirt. Protect machined surfaces against damage during cleaning.

CASING (100)

The casing should be inspected for excessive wear, corrosion or pitting. Areas most susceptible are indicated by the arrows in Fig. 22. Casing should be repaired or replaced if it exceeds the following criteria:

1. Localized wearing or grooving greater than 3.2 mm

(

in.) deep.

2. Pitting greater than 3.2 mm (

3. Irregularities in case gasket seat surface which could hinder or prevent sealing.

in.) deep.

Fig. 23

Fig. 22

IMPELLER (101)

1. Inspect impeller vanes for damage. Replace if grooved deeper than 1.6 mm ( than 0.8 mm (

2. Inspect shrouds for damage. Replace if worn or bent more than 0.8 mm (

3. Inspect leading and trailing edges of the vanes for pitting, and erosion or corrosion damage. Replace as in No. 1. (Area “c” in Fig. 23.)

4. Clean and check impeller bore diameter.

5. Check impeller balance. It should be rebalanced if it exceeds the criteria of ISO 1940 G1.0.

NOTE: Balancing impellers to ISO 1940 G1.0 requires extremely accurate tooling and equipment and should not be attempted unless such tooling and equipment are available.

in.) or if worn evenly more

in.). (Area “a” in Fig. 23.)

in.). (Area “b” in Fig. 23.)

BALL BEARINGS (112, 168)

1. Ball bearings should be inspected for contamination and damage. The condition of the bearings will provide useful information on operating conditions in the bearing frame (228).

2. Lubricant condition and residue should be noted.

3. Bearing damage should be investigated to determine cause. If cause is not normal wear, it should be corrected before pump is returned to service.

NOTE: It is good practice to replace all ball bearings that have been removed from their shaft fits. Always replace if they are worn, loose or rough and noisy when rotated. Replacement bearings must be of proper size and type.

4. Replacement bearings must be the same as, or equivalent to, those listed in Table 3.

Table 4

Model 3910 Bearings

Radial (Inboard)

Group

SA SX

MX, LA

XLX

NOTE: Bearing numbers are based on SKF / MRC designations.

6210 C3Z 6212 C3Z 6213 C3Z 6218 C3Z

6210 C3 6212 C3 6213 C3 6218 C3

Thrust

(Outboard)Grease Oil Mist

7310 BEGAM 7312 BEGAM 7312 BEGAM 7317 BEGAM

36 3910-11th IOM 5/08

Page 37

SHAFT (122)

1. Check bearing fits. If any are outside the tolerance shown in Tables 5 or 5A, replace the shaft (Fig. 24).

2. Check shaft surface for damage, especially in areas indicated by arrows in Fig. 24. Replace if damaged beyond reasonable repair.

Model 3910 Bearing Fits & Tolerances (SI Units)

According to ISO 286 (ANSI/ABMA Standard 7)

Location Description

Shaft O.D.

Interference

Radial

(Inboard)

Thrust

(Outboard)

Bearing I.D.

Frame I.D.

Clearance

Bearing O.D.

Shaft O.D.

Interference

Bearing I.D.

Frame I.D.

Clearance

Bearing O.D.

SA SX MX, LA XLX

50.013 60.015 65.015 90.018

50.002 60.002 65.002 90.003

0.002 0.002 0.002 0.003

0.025 0.030 0.030 0.038

49.988 59.985 64.985 89.980

50.000 60.000 65.000 90.000

90.000 110.000 120.000 160.000

90.022 110.022 120.022 160.025

0.000 0.000 0.000 0.000

0.037 0.037 0.037 0.050

90.000 110.000 120.000 160.000

89.985 110.022 119.985 159.975

50.013 60.015 60.015 85.018

50.002 60.002 60.002 85.003

0.002 0.002 0.002 0.003

0.025 0.030 0.030 0.038

49.998 59.985 59.985 84.980

50.000 60.000 60.000 85.000

110.000 130.000 130.000 180.000

110.022 130.025 130.025 180.025

0.000 0.000 0.000 0.000

0.037 0.043 0.043 0.050

110.000 130.000 130.000 180.000

109.985 129.982 129.982 179.975

Table 5

Group and Dimensions (mm)

3. Check shaft straightness. Use “V” blocks or balance rollers to support the shaft on bearing fit areas. Replace shaft if runout exceeds 0.03 mm (.001 in.)

NOTE: Do NOT use shaft centers for runout check as they may have been damaged when removing bearings or impeller.

Fig. 24

3910-11th IOM 5/08 37

Page 38

Model 3910 Bearing Fits & Tolerances (USA Units)

Location Description

Shaft O.D.

Interference

Radial

(Inboard)

Thrust

(Outboard)

Bearing I.D.

Frame I.D.

Clearance

Bearing O.D.

Shaft O.D.

Interference

Bearing I.D.

Frame I.D.

Clearance

Bearing O.D.

Table 5A

According to ISO 286 (ANSI/ABMA Standard 7)

Group and Dimensions (inches)

SA SX MX, LA XLX

1.9690 2.3628 2.5597 3.5440

1.9686 2.3623 2.5592 3.5434

0.0001 0.0001 0.0001 0.0001

0.0010 0.0012 0.0012 0.0015

1.9680 2.3616 2.5585 3.5425

1.9685 2.3622 2.5591 3.5433

3.5433 4.3307 4.7244 6.2992

3.5442 4.3316 4.7253 6.3002

0.0000 0.0000 0.0000 0.0000

0.0015 0.0015 1.0015 0.0020

3.5483 4.3307 4.7244 6.2992

3.5427 4.3301 4.7238 6.2982

1.9691 2.3628 2.3628 3.3472

1.9686 2.3623 2.3623 3.3466

0.0001 0.0001 0.0001 0.0001

0.0010 0.0012 0.0012 0.0015

1.9680 2.3616 2.3616 3.3457

1.9685 2.3622 2.3622 3.3465

4.3307 5.1181 5.1181 7.0866

4.3315 5.1191 5.1191 7.0876

0.0000 0.0000 0.0000 0.0000

0.0015 0.0017 0.0017 0.0020

4.3307 5.1181 5.1181 7.0866

4.3301 5.1174 5.1174 7.0856

WEAR RINGS (164, 202, 203, 230)

All units are equipped with casing (164), impeller (202 and

203) and seal chamber cover wear rings (230).

When clearances between the rings become excessive, hydraulic performance decreases substantially.

1. Measure all wear ring diameters (Figs. 25, 26, 27).

2. Calculate diametral wear ring clearances. Minimum diametral clearances should be as shown in Table 6.

3. Replace wear rings when diametral clearance exceeds two times the minimum clearance as shown in Table 6 or when the hydraulic performance has decreased to unacceptable levels. Refer to Renewal of Wear Parts for replacement instructions for wear rings.

NOTE: For operating temperatures above 260° C (500° F) and for materials with greater galling tendencies (e.g. stainless steel), increase diametral clearance dimensions by 0.13 mm (.005 in.).

38 3910-11th IOM 5/08

Fig. 25

Page 39

Fig. 26

SEAL CHAMBER COVER (184)

Seal chamber cover is available in two versions: one (optional) has a cooling chamber and water jacket cover (490) and the other (standard) does not. The (optional) cooled version is used when elevated pumpage temperatures are present.

1. Ensure all gasket/O-ring sealing surfaces are clean and have no damage that would hinder or prevent sealing (Fig. 28).

2. Ensure all cooling (where applicable), flush and drain passages are clear.

3. Inspect other surfaces for damage. Replace if worn, damaged or corroded more than 3.2 mm (

4. Measure inside diameter of seal chamber cover bushing (125). If the diametral clearance between it and the impeller hub (101) exceeds 1.20 mm (.047 in.), one or both parts should be replaced. Refer to Renewal of Wear Parts for replacement instructions for seal chamber cover bushing.

in.) deep.

Fig. 27

Table 6

Minimum Running Clearances

Diameter of

Impeller

Wear Ring

mm in. mm in.

<50 <2.000 0.25 0.010 To to 64.99 2.000 to 2.4999 0.28 0.011 65 to 79.99 2.500 to 2.999

80 to 89.99 3.000 to 3.499

90 to 99.99 3.500 to 3.999

100 to 114.99 4.000 to 4.499

115 to 124.99 4.500 to 4.999

125 to 149.99 5.000 to 5.999

150 to 174.99 6.000 to 6.999

175 to 199.99 7.000 to 7.999

200 to 224.99 8.000 to 8.999

225 to 249.99 9.000 to 9.999

250 to 274.99 10.000 to 10.999

275 to 299.99 10.000 to 11.999

300 to 324.99 12.000 to 12.999

Minimum Diametral Clearance

0.30

0.33

0.35

0.38

0.40

0.43

0.45

0.48

0.50

0.53

0.55

0.58

0.60

0.012

0.013

0.014

0.015

0.016

0.017

0.018

0.019

0.020

0.021

0.022

0.023

0.024

Fig. 28

3910-11th IOM 5/08 39

Page 40

BEARING FRAME (228)

1. Visually inspect bearing frame for damage and cracks.

2. Check frame inside surfaces for rust, scale or debris. Remove all loose and foreign material (Fig. 29).

3. Make sure all lubrication passages are clear.

4. Check bearing bores. If any are outside the tolerance in Table 6, replace the bearing frame.

GASKETS, O-RINGS, SHIMS, AND SEATS

NOTE: Spiral wound gaskets should not be reused.

1. Replace all gaskets, O-rings and shims at each overhaul / disassembly.

2. Inspect seats. They must be smooth and free of physical defects. Skin cut seats in lathe as necessary, maintaining dimensional relationships with other surfaces. Replace parts if seats are defective beyond reasonable repair.

GENERAL

All other parts should be inspected and repaired or replaced, as appropriate, if inspection indicates continued use would be harmful to satisfactory and safe pump operation.

Inspection must include, but not be limited to, the following:

Fig. 29

CARTRIDGE MECHANICAL SEAL

Refer to mechanial seal manufacturer’s instructions for assistance.

Cartridge type mechanical seals should be serviced by seal manufacturer.

COUPLING GUARD

1. Inspect guard for corrosion or other defects.

2. Replace guard or repair.

! WARNING

To avoid physical injury, coupling guard must be installed and must be maintained in first-class condition.

Bearing End Covers (109A) and (119A)

•

INPROS (123) and (123A)

•

Radial Heat Flinger (123B)*

•

Thrust Fan (123E)*

•

Bearing Locknut (136)

•

Impeller Key (178) and Coupling Key

•

Impeller Nut (304)

•

Bearing Lockwasher (382)

•

Water Jacket Cover (490)*

•

All Nuts, Bolts and Screws

•

* If supplied.

40 3910-11th IOM 5/08

Page 41

RENEWAL OF WEAR PARTS

REPLACEMENT OF SEAL CHAMBER COVER BUSHING

Seal chamber cover bushing (125) is held in place by a press fit and locked by three set screws.

Removal of Bushing (125)

1. Remove set screws.

2. Press bushing (125) out of fit toward bearing frame side of seal chamber cover (184) bore (Fig. 30).

Fig. 30

Installation of Bushing (125)

1. Clean bushing fit in seal chamber cover (184) thoroughly.

2. Chill new bushing (125) using dry ice or other suitable chilling substance, and install bushing into fit of cover (184). Be prepared to tap the bushing in place with a hardwood block or soft faced hammer (Fig. 31).

! WARNING

Dry ice and other chilling substances can cause physical injury. Contact supplier for information and advice for proper handling precautions and procedures.

3. Locate, drill and tap three new set screw holes on impeller side of cover (184) equally spaced between original set screw holes.

4. Install set screws and upset threads.

REPLACEMENT OF WEAR RINGS

Casing (164), impeller (202 and 203) and seal chamber cover wear rings (230) are held in place by a press fit and three set screws (222E and 320).

Removal of Wear Rings (164, 202, 203, 230)

1. Remove set screws (222E and 320).

2. Remove wear rings from casing (100), impeller (101), and seal chamber cover (184) using suitable pry or puller to force rings from fits.

Rings may also be machined for removal.

Excessive machining can damage ring fits and render parts unusable.

Installation of Wear Rings (164, 202, 203, 230)

1. Clean wear ring seats thoroughly, insuring they are smooth and free of scratches.

2. Heat new impeller wear rings (202 and 203) to 82° 93° C (180° - 200° F) using a uniform method for heating (e.g. - oven) and place on impeller (101) wear ring seats (Fig. 32).

Use insulated gloves to handle rings. Ringswill be hot and can cause physical injury.

CAUTION

Fig. 32

Fig. 31

3910-11th IOM 5/08 41

Page 42

3. Chill new casing wear ring (164) using dry ice or other suitable chilling substance, and install ring into fit of casing (100). Be prepared to tap the ring in place with a hard wood block or soft faced hammer (Fig. 33).

! WARNING

Dry ice and other chilling substances can cause physical injury. Contact supplier for information and advice for proper handling precautions and procedures.

5. Locate, drill and tap three new set screw holes equally spaced between the original holes in each new ring and ring seat area.

6. Install set screws (222E and 320) and upset threads.

The impeller and wear ring clearance setting

procedures 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.

Fig. 33

4. Chill new seal chamber cover wear ring (230), using dry ice or other suitable chilling substance, and install ring into fit of cover (184). Be prepared to tap the ring in place with a hardwood block or soft faced hammer (Fig. 34).

! WARNING

Dry ice and other chilling substances can cause physical injury. Contact supplier for information and advice for proper handling precautions and procedures.

Fig. 35

7. Check casing wear ring (164) runout / distortion by measuring bore at each set screw location with inside micrometers or vernier calipers (Fig. 35). Any distortion in excess of 0.08 mm (.003 in.) should be corrected by machining prior to trimming new impeller wear rings (202 and 203).

8. Measure bore of casing wear ring (164) to establish the required impeller wear ring (202) diameter to provide the recommended running clearances as indicated in Table 6 and subsequent note.

9. Repeat steps 7 and 8 for the seal chamber wear ring (230).

10. Turn impeller wear rings (202 and 203) to size after mounting on impeller (101).

NOTE A: All replacement impeller wear rings, except those hard faced, are supplied 0.51 mm (.020 in.) to

0.75 mm (.030 in.) oversize.

NOTE B: Spare hard faced impeller wear rings are not supplied oversize but are supplied to preestablished proper running clearances when both impeller and casing wear rings are renewed.

Fig. 34

42 3910-11th IOM 5/08

Page 43

For runout checks, firmly support bearing frame assembly in horizontal position, as shown in Fig. 36.

11. Check impeller wear ring runout in the following manner:

a. Install impeller key (178) on shaft (122) of

assembled bearing frame from which the seal chamber cover (184) has been removed, and on which the runouts have been determined to be within the specifications established in Reassembly section. Key should be at top (12 o’clock) position for installation of impeller (101).

CAUTION

Fig. 36

e. Rotate shaft (122) so indicator rides along the

casing side impeller wear ring (202) surface for 360 degrees.

f. Repeat steps d and e for seal chamber cover side

wear ring (203).

If impeller wear ring (203 and 203) runout is in excess of

0.13 mm (.005 in.):

a. Check for distortion at set screw areas.

b. Check shaft (122) runout and all mating surfaces

of shaft and impeller (101) hub for perpendicularity.

c. True up all surfaces found damaged and recheck

impeller wear ring (202 and 203) runout.

b. Install impeller (101) on shaft (122).

When handling the impeller, wear heavy work gloves to prevent cutting hands on sharp edges.

c. Secure impeller (101) firmly with impeller nut

(304).

NOTE: Impeller nut has LEFT HAND threads.

d. Mount dial indicator as shown in Fig. 37.

CAUTION

Fig. 37

3910-11th IOM 5/08 43

Page 44

REASSEMBLY

Refer to Table 7 for torque values while reassembling pump.

Leakage of process liquid may result in creating an explosive atmosphere. Ensure the materials of the pump casing,

impeller, shaft, sleeves, gaskets and seals are compatible with the process liquid.

Leakage of process liquid may result in creating an explosive atmosphere. Follow all pump and seal assembly

procedures.

Table 7

Maximum Torque Values for Model 3910 Fasteners

Values in N-m (ft.-lb.)

Construction - API Designation

Item

Number Description

136

304

353 and 355

365A

and 425

370H

370N

370P and

370W

Optional

469Q

(Optional)

NOTE: The torque values specified in the above table are for dry threads. These values should be reduced for lubricated threads only when lubricants of high stress ability (e.g. - Molycote) are used.

NOTE: Materials listed in the above table are equal to the respective API 610, 10th Edition (ISO 13709) material classes. In some cases, superior materials are substituted.

Bearing Locknut

Impeller Nut

Gland Studs & Nuts

Casing Studs & Nuts

Screw - Bearing Frame/ Seal Chamber Cover

Screw -Thrust Bearing End Cover to Frame

Screw -Radial Bearing End Cover to Frame

Screw -Thrust Deflector Fan Guard Support

Pump to Base Bolts

Group/

Size

SX, MX, LA

XLX

SA, SX

LA, XLX

All others

SA, SX MX (11") MX (13")

LA (16")

XLX (21")

SA SX

MX, LA

XLX

SA, SX

MX, LA

XLX

MX, LA

XLX

All 9 (7)

All

S-1 S-3 S-4 S-5 S-6

S-8

S-8N S-9 C-6

95 (70) 149 (110) 407 (300)

145 (107) 178 (131) 287 (212)

118 (87)

235 (173)

415 (306) 415 (306) 671 (495)

1006 (742)

1426 (1052)

41 (30)

80 (59) 142 (105) 346 (256)

41 (30)

80 (59)

9 (7)

955 (705)

A-8

A-8N D-1

Non-API

Material

Modified

A-8

44 3910-11th IOM 5/08

Page 45

CAUTION

Fig. 38

ASSEMBLY OF STANDARD GREASE LUBRICATED POWER END

This section covers assembly of standard grease lubricated power end. For power ends with optional features (pure oil mist lubrication, bearing cooling, etc.), refer to the appropriate section.

! WARNING

Pump components are heavy. Proper methods of lifting and securing must be employed to avoid physical injury and/or equipment damage.

NOTE: Make sure that all parts and threads are clean and that all directions under Inspections have been followed.

Leakage of process liquid may result in creating an

explosive atmosphere. Follow all pump and seal assembly procedures.

1. Install radial (inboard) bearing (168) on shaft (122) with shield facing shaft shoulder (Fig. 38).

NOTE: There are several methods used to install bearings. The recommended method is to use an induction heater that heats as well as demagnetizes the bearings.

Use insulated gloves when using a bearing heater. Bearing will get hot and can cause physical injury.

2. Install grease shelf (253) on shaft (122).

3. Install thrust (outboard) bearings (112) on shaft (122).

The Model 3910 uses duplex bearings mounted back-toback. Make sure orientation of the bearings is correct.

NOTE: There are several methods used to install bearings. The recommended method is to use an induction heater that heats as well as demagnetizes the bearings.

! CAUTION

Use insulated gloves when using a bearing heater. Bearings will get hot and can cause physical injury.

4. Place bearing lockwasher (382) on shaft (122). Place tang of lockwasher in keyway of shaft.

5. Thread bearing locknut (136) onto shaft (122). After bearings and shaft have cooled to ambient temperature, tighten locknut to torque value shown in Table 7.

6. Bend any tang of bearing lockwasher (382) into a slot of locknut (136).

CAUTION

3910-11th IOM 5/08 45

Page 46

Fig. 39

NOTE: Coat internal surfaces of bearings with lubricant to be used in service.

7. Press radial INPRO (123) into radial end cover (119A). Ensure expulsion port is at 6 o'clock position and is properly seated. Install radial bearing end cover (119A), and new end cover gasket (360) on bearing frame (228) (Fig. 39). For SA pumps, press radial INPRO (123) into bearing frame 228. Ensure expulsion port is at 6 o'clock position and is properly seated (Fig. 40).

11. Carefully guide shaft/bearing assembly into bearing frame (228) until thrust bearing (112) is seated against shoulder of frame (Fig. 41).

NOTE: Do not force assembly together.

Fig. 41

12. Check shaft (122) for free turning. If rubbing or binding is detected, determine cause and correct.

13. For SX, MX, LA, and XLX pumps, install three (3) thrust bearing end cover shims (390C) on the thrust bearing end cover (109A) and align holes. For SA pumps, install three (3) thrust bearing end cover gaskets (360A) on the bearing end cover (109A). Align the gasket to the end cover so that the openings in the gaskets align with the oil grooves on the end cover (Fig. 42).

Fig. 40

8. For SX, MX, LA, and XLX pumps, install and tighten radial end cover bolt/bearing frame screws (370P) evenly to the torque values shown in Table 7.

9. Coat outer races of bearings (112) and (168) with compatible oil.

10. Coat internal bearing surfaces of bearing frame (228) with compatible oil.

! CAUTION

Failure to align gasket with oil grooves will result in bearing failure from lack of lubrication.

Fig. 42

46 3910-11th IOM 5/08

Page 47

14. Install thrust bearing end cover (109A) over shaft (122) and onto bearing frame (228). For SA pumps, install thrust cover with the words “Top oil mist” on top.

15. Install and tighten thrust bearing end cover/bearing frame screws (370N) evenly to torque valves shown in Table 7.

! CAUTION

Do not over tighten thrust bearing end cover/ bearing frame screws.

16. Determine axial end play as follows:

a. Mount dial indicator as shown in Fig. 43.

b. Apply axial force to impeller end of shaft (122)

and firmly seat thrust bearing (112) against shoulder in bearing frame (228).

c. Apply axial force in opposite direction and firmly

seat thrust bearing (112) against thrust bearing end cover (109A).

d. Repeat steps b and c several times and record total

travel (end play) of rotating element.

e. Total travel (end play) must fall in the range of

0.025 to 0.125 mm (0.001 to 0.005 inches).

20. Press INPRO (123A) into thrust bearing end cover (109A). Ensure expulsion port is at 6 o'clock position and is properly seated.

21. Install O-ring (412, not shown) into groove in thrust bearing end cover (109A) (N/A on SA pumps).

22. Lubricate O-ring (412) with a suitable lubricant.

23. Install thrust bearing end cover (109A) with O-ring (412) over shaft (122) and into bore of bearing frame (228). Ensure that O-ring is not damaged while entering bore in frame.

24. Install and tighten thrust bearing end cover/ bearing frame screws (370N) evenly to torque values shown in Table 7.

Do not over tighten thrust bearing end cover/ bearing frame screws.

25. Check shaft (122) for free turning. If rubbing or excessive drag is detected, determine cause and correct.

For runout checks, firmly support bearing frame assembly in horizontal position, as shown in Fig. 36.

26. Check shaft (122) impeller fit runout in the following manner:

CAUTION

Fig. 43

17. The axial end play is achieved by adding or removing end cover gaskets (360C) for SA pumps or end cover shims (390C) between the thrust bearing end cover (109A) and the bearing frame (228). Add gaskets/shims if no axial end play is present.

18. Repeat steps 13 - 16. Total travel (end play) should fall in the range of 0.025 - 0.125 mm (.001 - .005 in.). If the measured total travel falls outside this range, remove or add the appropriate quantity of individual shims to obtain the proper total travel. For SA pumps, skip steps 19 through 22.

19. Remove thrust bearing end cover (109A).

a. Mount dial indicator on bearing frame (228) as

shown in Fig. 44.

b. Rotate shaft (122) through maximum arc from one

side of keyway to the other. If total indicator reading is greater than 0.050 mm (.002 in.), determine cause and correct.

Fig. 44

Avoid turning shaft so that dial indicator contacts keyway. Readings will be incorrect and damage to dial indicator could result.

CAUTION

3910-11th IOM 5/08 47

Page 48

27. Check shaft (122) seal fit runout in the following manner:

a. Mount dial indicator as shown in Fig. 45.

b. Rotate shaft (122) so indicator rides along shaft

surface for 360 degrees. If total indicator reading is greater than 0.050 mm (.002 in), determine cause and correct.

Fig. 45

Fig. 47

b. Rotate shaft (122) so indicator rides along the

bearing frame (228) lock for 360 degrees. If total indicator reading is greater than 0.10 mm (.004 in.), disassemble and determine cause.

30. Install and tighten any plugs and/or fittings removed during disassembly.

28. Check bearing frame (228) face runout in the following manner:

a. Mount dial indicator on shaft (122) as shown in

Fig. 46.

b. Rotate shaft (122) so indicator rides along the

bearing frame (228) face for 360 degrees. If total indicator reading is greater than 0.10 mm (.004 in), disassemble and determine cause.

Fig. 46

29. Check bearing frame (228) lock runout in the following manner:

ASSEMBLY OF OPTIONAL PURE OIL MIST LUBRICATED POWER END

Pure oil mist lubricated power ends are assembled in the same manner as grease lubricated power ends. Grease shelf (253) is not furnished with pure oil mist lubrication. Any reference to this part may be ignored.

ASSEMBLY OF POWER END WITH OPTIONAL RADIAL HEAT FLINGER

The radial heat flinger (123B) replaces the standard radial INPRO (123) and is installed in the same manner except three set screws need to be tightened. Remainder of assembly is the same as ring oil lubrication. During the assembly of the bearing frame (228) and seal chamber cover (184), install bearing frame / seal chamber cover gasket (540C) into recess on bearing frame (228) and align holes (Fig. 57).

ASSEMBLY OF POWER END WITH OPTIONAL AIR COOLING PACKAGE

Assemble power end as described in steps 1-23 of ring oil lubrication section. Note that in step 7, radial heat flinger (123B) replaces the standard radial INPRO (123).

24a. Position thrust fan guard support (234D) on thrust

bearing end cover (109A).

a. Mount dial indicator on shaft (122) as shown in

Fig. 47.

48 3910-11th IOM 5/08

Page 49

Fig. 48

24b. Install and tighten thrust bearing end cover/ bearing

frame screws (370N) evenly to torque values shown in Table 7.

! CAUTION

Do not over tighten thrust bearing end cover/ bearing frame screws.

24c. Install thrust fan (123E) over shaft (122).

24d. Position thrust fan (123E) approximately 0.8 mm

(.030 in.) from thrust INPRO (123A) and tighten deflector fan set screw (222) firmly. On SA, pumps butt fan against coupling diameter shoulder.

24e. Tighten heat flinger set screws (222) firmly.

Complete assembly of power end as described in steps 25 30 of grease oil lubrication section. During the assembly of the bearing frame (228) and seal chamber cover (184), install bearing frame / seal chamber cover gasket (540C) into recess on bearing frame (228) and align holes (Fig. 57).

INSTALLATION OF OPTIONAL WATER JACKET COVER

1. Install outer and inner water jacket cover O-rings (412S and 497T, respectively) into grooves in water jacket cover (490) (Fig. 49).

Fig. 49

2. Lubricate sealing surfaces in seal chamber cover (184) and O-rings (412S and 497T) with suitable lubricant.

3. Insert water jacket cover (490) with O-rings (412S and 497T) into fit in seal chamber cover (184). Ensure that water jacket cover enters uniformly and that O-rings are not damaged.

3910-11th IOM 5/08 49

Page 50

PRELIMINARY INSTALLATION OF SEAL CHAMBER COVER

1. Install eyebolt in tapped hole provided in seal chamber cover (184) (Fig. 50).

2. Rig sling to eyebolt and to overhead lifting device.

3. Lift seal chamber cover (184) and position to align with shaft (122).

4. Install seal chamber cover (184) on bearing frame assembly by guiding cover carefully over shaft (122) and into bearing frame (228) lock.

5. Install seal chamber cover/bearing frame bolts (370H) and tighten evenly using alternating pattern. Torque bolts to values shown in Table 7.

CAUTION

Fig. 51

For runout checks, firmly support bearing frame assembly in horizontal position, as shown in Fig. 36.

6. Check seal chamber cover (184) face runout in the following manner:

Fig. 50

7. Check seal chamber cover (184) lock runout in the following manner:

a. Mount dial indicator on shaft (122) as shown in

Fig. 52.

b. Rotate shaft (122) so indicator rides along the seal

chamber cover (184) lock for 360 degrees. If total indicator reading is greater than 0.13 mm (.005 in.), determine cause and correct.

a. Mount dial indicator on shaft (122) as shown in

Fig. 51.

b. Rotate shaft (122) so indicator rides along the seal

chamber cover (184) gasket face for 360 degrees. If total indicator reading is greater than 0.13 mm (.005 in.), determine cause and correct.

NOTE: If two dial indicators are available, steps 6 and 7 may be performed simultaneously.

The impeller and wear ring clearance setting

procedures 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.

Fig. 52

50 3910-11th IOM 5/08

Page 51

8. Check seal chamber cover wear ring (230) runout in the following manner:

a. Mount dial indicator on shaft (122) as shown in

Fig. 53.

b. Rotate shaft (122) so indicator rides on seal

chamber cover wear ring (230) surface for 360 degrees. If total indicator reading exceeds 0.15 mm (.006 in.), determine cause and correct.

Fig. 53

Table 8

Maximum Allowable Seal Chamber Face

Runout

Group Maximum Allowable Total Indicator Reading

SA 0.045 mm (0.0018 in.)

SX 0.05 mm. (.002 in.)

MX, LA 0.06 mm. (.0024 in.)

XLX 0.07 mm. (.0028 in.)

10. Check seal chamber lock (register) runout in the following manner:

a. Mount dial indicator on shaft (122) or shaft sleeve

(126) as shown in Fig. 55.

b. Rotate shaft (122) so indicator rides along the seal

chamber lock (register) for 360 degrees. If total indicator reading is greater than 0.125 mm (.005 in.), determine cause and correct.

9. Check seal chamber face runout in the following manner:

a. Mount dial indicator on shaft (122) as shown in

Fig. 54.

b. Rotate shaft (122) so indicator rides along the seal

chamber face for 360 degrees. If total indicator reading is greater than the values shown in Table 7, determine cause and correct.

Fig. 54

Fig. 55

11. Install impeller key (178) in keyway of shaft (122). Key should be at top (12 o’clock) position for installation of impeller (101).

12. Install impeller (101) on shaft (122).

When handling impeller, wear heavy work gloves to prevent cutting hands on sharp edges.

NOTE: Anti-galling compound should be applied to the impeller bore to aid in assembly and disassembly.

13. Install impeller nut (304) and tighten firmly.

NOTE: Impeller nut has LEFT HAND threads.

CAUTION

The impeller and wear ring clearance setting

procedures 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.

3910-11th IOM 5/08 51

Page 52

14. Check impeller (101) impeller wear ring (202) runout in the following manner:

a. Mount dial indicator as shown in Fig. 63.

b. Rotate shaft (122) so indicator rides along wear

ring (202) surface for 360 degrees. If total indicator reading is greater than 0.13 mm (.005 in.), determine cause and correct.

Fig. 56

INSTALLATION OF CARTRIDGE TYPE MECHANICAL SEAL AND SEAL CHAMBER COVER

NOTE: Refer to mechanical seal manufacturer’s drawings and instructions for assistance during installation of mechanical seal.

1. Loosen and remove impeller nut (304).

NOTE: Impeller nut has LEFT HAND threads.

2. Remove impeller (101), impeller key (178), and seal chamber cover (184) as described in disassembly.

3. Lubricate all O-rings with suitable lubricant, unless seal manufacturer’s instructions indicate otherwise.

4. Slide cartridge seal assembly (rotary, stationary, gland, gland gasket and sleeve) onto shaft (122) (Fig. 57).

NOTE: Ensure that mechanical seal gland piping connections are properly oriented.

Fig. 57

5. Rig sling to eyebolt and to overhead lifting device.

6. Lift seal chamber cover (184) and position to align with shaft (122).

7. Install seal chamber cover (184) on power end by guiding cover carefully over cartridge seal rotary and ensuring that gland studs (353) smoothly enter holes in cartridge seal gland and that cover pilots into bearing frame (228) lock.

Mechanical seal parts may be damaged if they or adjacent parts are handled improperly.

8. Install seal chamber cover/bearing frame bolts (370H) and tighten using alternating pattern. Torque bolts to values shown in Table 7.

9. Install gland stud nuts (355) and tighten evenly to torque values shown in Table 7.

10. Tighten set screws in locking collar.

11. Disengage spacer ring or clips.

12. Check for free turning. If rubbing or excessive drag is detected, determine cause and correct.

CAUTION

INSTALLATION OF IMPELLER

NOTE: It is desirable to repeat runout checks on seal chamber cover face, lock and wear ring surfaces as previously described in “Preliminary Installation of Seal Chamber Cover”.

1. Install impeller key (178) in keyway of shaft (122). Key should be at top (12 o’clock) position for installation of impeller (101).

When handling impeller, wear heavy work gloves to prevent cutting hands on sharp edges.

CAUTION

52 3910-11th IOM 5/08

Page 53

2. Install impeller (101) on shaft (122).

NOTE: Anti-galling compound should be applied to the impeller bore to aid in assembly and disassembly.

3. Install impeller nut (304) and tighten to torque values shown in Table 7.

NOTE: Impeller nut has LEFT HAND threads.

4. Tighten the set screw (198A) in the end of the impeller nut (304).

5. Check for free turning. If rubbing or excessive drag is detected, determine cause and correct.

NOTE: It is desirable to repeat runout check on impeller wear ring surface as previously described in “Replacement of Wear Rings.”

INSTALLATION OF COUPLING HUB

Install key and pump half coupling hub on shaft (122) until hub is flush with the scribe mark determined during disassembly (Fig. 58). Refer to coupling manufacturer’s instructions for assistance.

INSTALLATION OF BACK PULL-OUT ASSEMBLY IN CASING

1. Install new casing gasket (351) on gasket surface of casing (100).

NOTE: Anti-galling compound may be applied to the casing fits to aid in assembly and disassembly.

2. Replace back pull-out assembly in casing (100) using Goulds back pull-out device or other suitable means. Refer to instructions in Appendix III.

3. Lower back pull-out assembly into proper position in casing (100) by loosening jacking bolts (418) evenly.

NOTE: Ensure that casing gasket is not damaged.

4. Install casing stud nuts (425).

5. Inspect gap between seal chamber cover (184) and casing (100) and adjust casing stud nuts (425) as necessary to make gap uniform.

6. Tighten casing stud nuts (425) uniformly, using alternating pattern, until seal chamber cover (184) is in metal-to-metal contact with the casing (100). Tighten each nut to torque value shown in Table 7.

POST ASSEMBLY CHECKS

All checks and procedures listed under Safety,

Installation, Operation and Preventive Maintenance sections must be followed.

Fig. 58

7. Check for free turning. If rubbing or excessive drag is detected, determine cause and correct.

ADDITIONAL ASSEMBLY

1. Replace coupling spacer, coupling guard and auxiliary piping, tubing, and equipment that were removed during preparation for disassembly.

2. Lubricate bearings as described in the Preventive Maintenance section.

Rotate shaft by hand to ensure it rotates smoothly and

there is no rubbing which could lead to excess heat generation and or sparks.

3910-11th IOM 5/08 53

Page 54

ASSEMBLY TROUBLESHOOTING

Symptom Probable Cause Remedy

Bearing internal clearance too great. Replace bearings with correct type.

Excessive shaft end play.

Excessive shaft runout. Shaft bent. Replace.

Excessive bearing frame flange runout.

Excessive seal chamber cover runout.

Excessive impeller wear ring runout.

Excessive thrust bearing end cover shim pack thickness.

Thrust bearing end cover loose. Tighten screws.

Shaft bent. Replace.

Bearing frame flange distorted. Replace.

Seal chamber cover not properly seated on frame. Replace or remachine.

Corrosion or wear. Replace or remachine.

Bent shaft. Replace.

Improper machining of wear ring. Replace or remachine.

Remove individual shims to obtain proper thickness.

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THIS PAGE LEFT BLANK INTENTIONALLY

3910-11th IOM 5/08 55

Page 56

PARTS LIST WITH STANDARD MATERIALS OF CONSTRUCTION

Materials shown are typical. Refer to order documentation for actual materials furnished.

Item Part Name

100 101

109A

112

119A

122 123

123A.

123B 123C

125 136 164 168 178 184

198A

202 203 222

222E

228 230 234

234D

240 253 304 320 340 351 353 355

356A

360

360A

370H

370N 370P

382 390C 408A

412

418

425 469P 497F 497H 497S 540C

Casing Impeller Thrust Bearing End Cover Ball Bearing, Thrust Radial Bearing End Cover Shaft Deflector, Radial Deflector, Thrust Deflector, Fan, Radial Deflector, Fan Thrust Throat Bushing, Seal Chamber Locknut, bearing Wear Ring, Casing Ball Bearing, Radial Key, Impeller Seal Chamber Cover Set Screw, Impeller Nut Wear Ring, Impeller Wear Ring, Impeller Set Screw, deflector Set Screw, stationary wear rings Bearing Frame Wear Ring, Seal Chamber Cover Deflector Fan Guard Support, Deflector Fan Guard Motor Support (Casing Mount) Grease Shelf Impeller Nut Set Screw, Impeller Wear Ring Motor Support (Frame Mount) Gasket, Casing Stud, Gland Nut, Gland Stud Stud, Casing Gasket, Radial Bearing End Cover Gastket, Thrust Bearing End Cover Screw, Bearing Frame/ Seal Chamber Cover Screw, Thrust Bearing End Cover Screw, Radial Bearing End Cover Lockwasher, Bearing Shim Pack, Thrust Bearing End Cover Plug, Oil Drain O-ring, Thrust Bearing End Cover Bolt, Jacking Nut, Casing Stud Retainer, Oil Ring O-ring, Thrust Deflector O-ring, Radial Deflector O-ring, Radial End Cover Gasket, Frame/Seal Chamber Cover

Qty

Construction - API Designation

per

Pump

1 1212 1234 1296 1 1212 1222 1265 1222 1265 1 1212

1 pair Steel

1 2210 1 2238 2256 2244 2256 1 1618 1 1618 1 1425 1 1425 1 1001 2244 2256 2244 2256 1 Steel 1 1001 1232 1265 1232 1265 1 Steel 1 2229 2224 2229 1 1212 1234 1296 1 2229 1 1001 1299 1071 1299 1071 1 1001 1299 1071 1299 1071 2 2229 6 2229 1 1212 1 1001 1232 1265 1232 1265 1 3201 1 3201 1 3201 1 3201 1 2210 2229 6 2229 1 3201 1 Spiral Wound 316 Stainless Steel 4 2239 4 2285

Var. 2239

1 Vellumoid 3 Vellumoid 4 2210 5 2210 5 2210 1 Steel 1 304SS 1 Steel with magnetic insert 1 Buna N 4 2210

Var. 2239

2 2285 1 Buna N 1 Buna N 1 Buna N 1 Aramid Fiber

S-4 S-6 S-8 C-6 A-8

56 3910-11th IOM 5/08

Page 57

Material

Cast Iron Cast Iron Nitronic 60 Carbon Steel 12% Chrome Steel 12% Chrome Steel 12% Chrome Steel 316L Stainless Steel 316L Stainless Steel 12% Chrome Steel Aluminum Bismuth Bronze Steel 316 Stainless Steel 4140 Steel 410 Stainless Steel 316L Stainless Steel Steel 316L Stainless Steel

Materials Cross Reference Chart

Goulds Pumps Material Code

1000

1001

1071

1212

1222

1232

1234

1265

1296

1299

1425

1618

2210

2229

2238

2244

2256

3201

3223

Material Designation Other

A48 Class 25 A48 Class 20 A743 Gr. CF10SMnN A216 WCB A743 Gr. CA6NM A743 Gr. CA15 A487 Gr. CA6MN Class A A743 Gr. CF3M A351 Gr. CF3M A743 Gr. CA15 SC64D UNS A03190 B505 CDA 89320 A108 Gr. 1211 UNS G12110 A276 Type 316 A434 Gr. 4140 Class BD A276 Type 410 UNS S41000 A276 Type 316L UNS S31603 A283 Grade D A240 Type 316L

ASTM

Carbon Steel 316SS 4140 Steel 4140 Steel

FASTENERS/PLUGS

Material Goulds Pumps Material Code ASTM

2210 A307 Grade B 2229 F593 Alloy Group 2 2239 A193 Grade B7 2285 A194 Grade 2 H

3910-11th IOM 5/08 57

Page 58

MODEL 3910 SA, SX, MX, AND LA PUMPS WITH

FRAME MOUNTED MOTOR SUPPORT

58 3910-11th IOM 5/08

Page 59

MODEL 3910 SA, SX, MX, AND LA PUMPS WITH

CASING MOUNTED MOTOR SUPPORT

3910-11th IOM 5/08 59

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60 3910-11th IOM 5/08

Page 61

SPARE PARTS

RECOMMENDED SPARE PARTS ....................61

When ordering spare parts, always state Goulds serial number, and indicate part name and item number from relevant sectional drawing. It is imperative for service reliability to have a sufficient stock of readily available spares.

RECOMMENDED SPARE PARTS

It is suggested that the following spare parts be stocked, where applicable:

Thrust Bearing (Duplex Pair) (112)

•

Throat Bushing - Seal Chamber Cover (125)

•

Bearing Locknut (136)

•

Casing Wear Ring (164)

•

Radial Bearing (168)

•

Impeller Wear Ring - Casing Side (202)

•

Impeller Wear Ring - Cover Side (203)

•

Set Screws (222E and 320)

•

Seal Chamber Cover Wear Ring (230)

•

Impeller Nut (304)

•

For critical services, the following parts should also be stocked, where applicable:

Impeller (101) with Impeller Rings (202 and 203)

•

Thrust Bearing End Cover (109A)

•

Radial Bearing End Cover (119A)

•

Shaft (122)

•

Radial INPRO (123)

•

Casing Gasket (351)

•

Radial Bearing End Cover Gasket (360)

•

Thrust Bearing End Cover Gaskets (360A)

•

Bearing Lockwasher (382)

•

Cartridge Mechanical Seal (383)

•

Thrust Bearing End Cover Shims (390C)

•

Thrust Bearing End Cover O-ring (412)

•

Water Jacket Cover O-rings (412S and 497T)

•

Frame/Seal Chamber Cover Gasket (540C)

•

Thrust INPRO (123A)

•

Heat Flinger (123B)

•

Thrust Fan (123E)

•

Impeller Key (178)

•

An alternative approach is to stock a complete back pull-out assembly. This is a group of assembled parts which includes all but the casing and coupling.

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62 3910-11th IOM 5/08

Page 63

APPENDIX I-A

APPENDIX I- Installation and Disassembly Instructions for Goulds ANSI B15.1

Coupling Guards

A — All Power Ends Except Those with Optional Air Cooling Package ........63

B — Power Ends with Optional Air Cooling Package ..................67

APPENDIX II - Dial Indicator (Rim-and-Face) Alignment Procedure ..........71

APPENDIX III - Removal and Assembly of Back Pull-Out Assembly ..........75

INSTALLATION AND DISASSEMBLY

INSTRUCTIONS FOR GOULDS ANSI B15.1

COUPLING GUARDS

(CASING MOUNT MOTOR SUPPORT ONLY)

The coupling guard used in an ATEX classified

environment must be constructed from a nonsparking material.

All Power Ends Except Those Mounted with Optional Air Cooling Package

! WARNING

Before installation or disassembly of the coupling guard is performed, the driver must be de-energized, the driver controller / starter put in a locked-out position and a caution tag placed at the controller / starter indicating the disconnect. Replace coupling guard before resuming normal operation of the pump. ITT Industries - Goulds Pumps assumes no liability for avoiding this practice.

Simplicity of design allows complete assembly of the coupling guard, including the end plate (pump end), in about fifteen minutes. If the end plate is already in place, assembly can be accomplished in about five minutes. Fig. I-A-1 shows the coupling guard components.

INSTALLATION

NOTE: If end plate (pump end) is already installed, make any necessary coupling adjustments and then proceed to Step 7.

1. Remove spacer portion of coupling. Refer to coupling manufacturer’s instructions for assistance.

2. If the coupling hub diameter is larger than the diameter of the opening in the end plate (234B), remove the coupling hub.

Fig. I-A-1

3. Remove three thrust bearing end cover/bearing frame screws (370N) as indicated in Fig. I-A-2.

3910-11th IOM 5/08 63

Fig. I-A-2

Page 64

4. Align the end plate (234B) to the thrust bearing end cover (109A) so that the two slots in the end plate align with the bolts remaining in the end cover, and the three holes in the end plate align with the holes in the end cover.

5. Replace the three thrust bearing end cover / bearing frame bolts (370N) and torque to values shown in Table 8.

6. Replace coupling hub (if removed) and spacer portion of coupling. Refer to coupling manufacturer’s instructions for assistance.

Fig. I-A-4

NOTE: Coupling adjustments should be completed before proceeding with coupling guard assembly.

7. Spread opening of coupling guard half (501B) slightly and place over pump end plate (234B) as shown in Fig. I-A-3.

The proper sequence of components is shown in Fig. I-A-5; an assembled unit is shown in Fig. I-A-6.

Fig. I-A-5

Fig. I-A-3

The annular groove in the guard is located around the end plate as indicated in Fig. I-A-4.

NOTE: Locate opening (flange) so that it will not interfere with piping but will allow access for installing bolts (Step 8).

8. Place one washer over bolt and insert bolt through round hole at front end of guard half (501B).

9. Place a second washer over exposed end of bolt.

10. Thread nut onto exposed end of bolt and tighten firmly.

11. Spread opening of remaining coupling guard half (501B) slightly and place over installed coupling guard half so that annular groove in remaining coupling guard half faces the driver as indicated in Fig. I-A-7.

Fig. I-A-6

64 3910-11th IOM 5/08

Page 65

Fig. I-A-7

12. Repeat steps 8-10 for rear end of coupling guard half (501B), except that nut should be finger tightened only.

13. Adjust length of coupling guard to completely cover shafts and coupling as shown in Fig. I-A-8 by sliding rear coupling guard half (501B) towards motor.

14. Repeat steps 8-10 for center slots in coupling guard.

15. Tighten all nuts on the guard assembly firmly.

DISASSEMBLY

The coupling guard must be removed for certain maintenance and adjustments to the pump, such as adjustment of the coupling. The coupling guard should be replaced after maintenance is completed.

! WARNING

Before assembly or disassembly of the coupling guard is performed, the driver must be de-energized, the driver controller / starter put in a locked-out position and a caution tag placed at the controller / starter indicating the disconnect. Replace coupling guard before resuming normal operation of the pump. ITT Industries - Goulds Pumps assumes no liability for avoiding this practice.

Fig. I-A-8

! WARNING

DO NOT resume normal pump operation with the coupling guard removed.

1. Remove nut, bolt, and washers from center slotted hole in the coupling guard assembly.

2. Slide driver end coupling guard half (501B) towards pump (Fig. I-A-8).

3. Remove nut, bolt, and washers from driver coupling guard half (501B).

4. Spread opening of driver coupling guard half (501B) slightly and lift over remaining coupling guard half (Fig. I-A-7).

5. Remove nut, bolt, and washers from remaining coupling guard half (501B).

6. Spread bottom of coupling guard half slightly and lift off pump end plate (234B) (Fig. I-A-3).

This completes disassembly of the coupling guard.

NOTE: It is not necessary to remove the end plate (pump end) from the pump bearing frame. Before removing other components, refer to Disassembly section of this manual.

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66 3910-11th IOM 5/08

Page 67

APPENDIX I-B

INSTALLATION AND DISASSEMBLY

INSTRUCTIONS FOR GOULDS ANSI B15.1

COUPLING GUARDS

(CASING MOUNT MOTOR SUPPORT ONLY)

The coupling guard used in an ATEX classified

environment must be constructed from a nonsparking material.

Power Ends with Optional Air Cooling Package

! WARNING

Before installation or disassembly of the coupling guard is performed, the driver must be de-energized, the driver controller/starter put in a locked-out position and a caution tag placed at the controller/starter indicating the disconnect. Replace coupling guard before resuming normal operation of the pump. ITT Industries - Goulds Pumps assumes no liability for avoiding this practice.

Simplicity of design allows complete assembly of the coupling guard, including the thrust end deflector fan guard support, in about twenty minutes. If the guard support is already in place, assembly can be accomplished in about ten minutes. Fig. I-B-1 shows the coupling guard components.

1. Remove spacer portion of coupling. Refer to coupling manufacturer’s instruction for assistance.

2. If the coupling hub diameter is larger than the diameter of the opening in the deflector fan guard support (234D), remove the coupling hub.

3. Loosen thrust deflector fan set screw (222)(Fig. I-B-2).

Fig. I-B-2

4. Slide thrust deflector fan (123E) off shaft (122).

5. Remove thrust bearing end cover/bearing frame screws (370N) (Fig. I-B-3).

Fig. I-B-1

INSTALLATION

NOTE: If deflector fan guard support is already installed, make any necessary coupling adjustments and then proceed to step 11.

Fig. I-B-3

3910-11th IOM 5/08 67

Page 68

6. Align the thrust deflector fan guard support (234D) to the thrust bearing end cover (109A) so that the slots in the support align with the holes in the end cover.

7. Replace the thrust bearing end cover/bearing frame screws (370N) and torque to values shown in Table 8.

Do not over tighten thrust bearing end cover/ bearing frame screws.

8. Install thrust deflector fan (123E) over shaft (Fig. I-B-2).

9. Position thrust deflector fan (123E) approximately 0.8 mm (.030 in.) from thrust bearing end cover (109A) and tighten deflector set screw (222) firmly.

10. Slide thrust deflector fan guard (234) over guard support (234D) and align holes in guard with tapped holes in guard support (Fig. I-B-4).

11. Install thrust deflector fan guard/support screws (469Q) and tighten to value shown in Table 8.

12. Replace coupling hub (if removed) and spacer portion of coupling. Refer to coupling manufacturer’s instructions for assistance.

NOTE: Coupling adjustments should be completed before proceeding with coupling guard assembly.

!CAUTION

Fig. I-B-5

Fig. I-B-6

NOTE: Locate opening (flange) so that it will not interfere with piping but will allow access for installing bolts (Step 14).

14. Place one washer over bolt and insert bolt through round hole at front end of guard half (501B).

Fig. I-B-4

13. Spread opening of coupling guard half (501B) slightly and place over thrust deflector fan guard (234) so that annular groove in guard half locates around guard support extension (Fig. I-B-5 and I-B-6).

15. Place a second washer over exposed end of bolt and tighten firmly.

16. Thread nut onto exposed end of bolt and tighten firmly.

The proper sequence of components is shown in Fig. I-B-7; an assembled unit is shown in Fig. I-B-8.

Fig. I-B-7

68 3910-11th IOM 5/08

Page 69

Fig. I-B-8

DISASSEMBLY

The coupling guard must be removed for certain maintenance and adjustments to the pump, such as adjustment of the coupling. The coupling guard should be replaced after maintenance is completed.

! WARNING

17. Spread opening of remaining coupling guard half (501B) slightly and place over installed coupling guard half so that annular groove in remaining coupling guard half faces the driver (Fig. I-B-9).

18. Repeat steps 14-16 for rear end of coupling guard half (501B), except that nut should be finger tightened only.

19. Adjust length of coupling guard to completely cover shafts and coupling as shown in Fig. I-B-10 by sliding rear coupling guard half (501B) towards motor.

20. Repeat steps 14-16 for center slots in coupling guards.

21. Tighten all nuts on the guard assembly firmly.

Fig. I-B-9

! WARNING

DO NOT resume normal pump operation with the coupling guard removed.

1. Remove nut, bolt and washers from center slotted hole in the coupling guard assembly.

2. Slide driver end coupling guard half (501B) towards pump (Fig. I-B-10).

3. Remove nut, bolt and washers from driver coupling guard half (501B).

4. Spread opening of driver coupling guard half (501B) slightly and lift over remaining coupling guard half (Fig. I-B-9).

5. Remove nut, bolt and washers from remaining coupling guard half (501B).

6. Spread bottom of coupling guard half slightly and lift off pump end plate (234B) (Fig. I-B-5).

This completes disassembly of the coupling guard.

NOTE: It is not necessary to remove the thrust deflector fan guard from the pump bearing frame. Before removing other components, refer to

Disassembly section of this manual.

Fig. I-B-10

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APPENDIX II

DIAL INDICATOR (RIM-AND-FACE)

ALIGNMENT PROCEDURE

Alignment procedures must be followed to prevent

unintended contact of rotating parts. Follow coupling manufacturer's installation and operation procedures.

Appendix II details the procedure to be followed when using the dial indicator (rim-and-face) method of aligning pump and motor shafts.

Other alignment methods (reverse dial indicator, laser) are acceptable. Maximum allowable misalignment criteria for these methods is shown in the Alignment Procedure.

Good alignment is achieved when the dial indicator readings as specified in this alignment procedure are equal to 0.05 mm (.002 in.) Total Indicator Reading (T.I.R.) or less when the pump and driver are at operating temperature (Final Alignment).

MEASUREMENT

To ensure accuracy of indicator readings:

1. Always rotate both coupling halves together so indicators contact the same point on coupling half Y. This will eliminate any measurement problems due to runout on coupling half Y.

2. Take indicator measurements with driver hold-down bolts tightened. Loosen hold-down bolts prior to making alignment corrections.

3. Take care not to damage indicators when moving driver during alignment corrections.

ANGULAR ALIGNMENT

A unit is in angular alignment when indicator A (angular indicator) does not vary by more than 0.05 mm (.002 in.) as measured at four points 90° apart at operating temperature.

SET UP

1. Mount two dial indicators on the pump coupling half X so they contact the driver coupling half Y (Fig. II-A).

Fig. II-A

2. Check setting of indicators by rotating coupling half X to ensure indicators stay in contact with coupling half Y but do not bottom out. Adjust indicators accordingly.

Axial Correction

1. Zero indicator A on suction / discharge centerline (12 o’clock) towards the suction (Fig. II-B).

2. Rotate indicators/coupling halves 180° (6 o’clock). Observe needle and record reading.

3a. Negative Reading - The coupling halves are farther

apart at the second (6 o’clock) position than at the intial (12 o’clock) position. Correct by adding shims in line with the (12 o’clock) position, or by removing shims in line with the (6 o’clock) position (Fig. II-B).

3b. Positive Reading - The coupling halves are farther

apart at the intial (12 o’clock) position than at the second (6 o’clock) position. Correct by adding shims in line with the (6 o’clock) position, or by removing shims in line with the (12 o’clock) position (Fig. II-B).

3910-11th IOM 5/08 71

Page 72

5. Re-check both axial and transverse readings to ensure adjustment of one did not disturb the other. Correct as necessary.

PARALLEL ALIGNMENT

A unit is in parallel alignment when indicator P (parallel indicator) does not vary by more than 0.05 mm (.002 in.) as measured at four points 90° apart at operating temperature, or when the shaft centerlines are within the recommended cold setting criteria as shown in Table II-1.

Fig. II-B

4. Repeat steps 1 through 3 until indicator A reads 0.05 mm (.002 in.) or less.

Transverse Correction

1. Zero indicator A on transverse centerline, 90° clockwise from suction centerline (3 o’clock, Fig. II-C).

2. Rotate indicators/coupling halves 180°.

3a. Negative Reading - The coupling halves are farther

apart at the second (9 o’clock) position than at the initial (3 o’clock) position. Correct by adding shims in line with the (3 o’clock) position, or by removing shims in line with the (9 o’clock) position (Fig. II-C).

3b. Positive Reading - The coupling halves are farther

apart at the initial (3 o’clock) position than at the second (9 o’clock) position. Correct by adding shims in line with the (9 o’clock) position, or by removing shims in line with the (3 o’clock) position (Fig. II-C).

Table II-1

Cold Setting of Parallel

Vertical Alignment

Driver Type Set Driver Shaft

Electric Motor 0.05 - 0.10 mm LOW

(.002 - .004 in. LOW)

Axial Correction

1. Zero indicator P on suction/discharge centerline (12 o’clock) towards the suction (Fig. II-D).

2. Rotate indicator/coupling halves 180° (6 o’clock). Observe needle and record reading.

3a. Negative Reading - Coupling half X is farther from the

suction than coupling half Y. Correct by moving driver away from the suction a distance equal to one-half that of the total reading (Fig. II-D).

3b. Positive Reading - Coupling half X is closer to the

suction than coupling half Y. Correct by moving driver towards the suction a distance equal to one-half that of the total reading (Fig. II-D).

Fig. II-C

NOTE: Drive trains of over 450 pounds are supplied with adjustment provisions fastened to the motor support which may be used to make all horizontal alignment corrections.

4. Repeat steps 1 through 3 until indicator A reads

0.05 mm (.002 in.) or less.

NOTE: Equal amounts of shims must be added to or removed from entire driver face, or the vertical angular alignment will be affected.

4. Repeat steps 1 through 3 until indicator P reads 0.05 mm (.002 in.) or less when hot, or per Table II-1 when cold.

Fig. II-D

72 3910-11th IOM 5/08

Page 73

Transverse Correction

1. Zero indicator P on transverse centerline, 90° clockwise from top suction centerline (3 o’clock, Fig. II-E).

2. Rotate indicator/coupling hubs 180° (9 o’clock). Observe needle and record reading.

3a. Negative Reading - Coupling half X is farther away

from the initial (3 o’clock) position than coupling half Y. Correct by moving driver away from the initial (3 o’clock) position towards the second (9 o’clock) position a distance equal to one-half that of the total reading (Fig. II-E).

3b. Positive Reading - Coupling half X is closer to the

initial (3 o’clock) position than coupling half Y. Correct by moving driver towards the initial (3 o’clock) position away from the second (9 o’clock) position a distance equal to one-half that of the total reading (Fig. II-E).

COMPLETE ALIGNMENT

A unit is in complete alignment when both indicators A (angular) and P (parallel) do not vary by more than 0.05 mm (.002 in.) as measured at four points 90° apart when pump and driver are at operating temperature.

1. Zero indicators A and P on suction/discharge centerline (12 o’clock).

2. Rotate indicator towards the suction / coupling hubs 180° (6 o’clock). Observe the needles and record the readings.

3. Make corrections as outlined previously.

4. Zero indicators A and P on transverse centerline, 90° clockwise from suction centerline (3 o’clock).

5. Rotate indicators/coupling hubs 180° (9 o’clock). Observe the needles and record the readings.

6. Make corrections as outlined previously.

7. Recheck both axial and transverse readings to ensure adjustment of one did not disturb the other.

8. Correct as necessary.

NOTE: With experience, the installer will understand the interaction between angular and parallel alignments and will make corrections appropriately.

Fig. II-E

NOTE: Failure to slide driver evenly will affect horizontal angular alignment.

4. Repeat steps 1 through 3 until indicator P reads 0.05 mm (.002 in.) or less.

5. Re-check both axial and transverse readings to ensure adjustment of one did not disturb the other. Correct as necessary.

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APPENDIX III

REMOVAL AND INSTALLATION OF

BACK PULL-OUT ASSEMBLY USING

GOULDS BACK PULL-OUT REMOVAL DEVICE

! WARNING

Before removal of the back pull-out assembly, the driver must be de-energized, the driver controller/ starter put in a locked-out position and a caution tag placed at the starter indicating the disconnect.

! WARNING

Pump components are heavy. Proper methods of lifting must be employed to avoid physical injury and/or equipment damage.

Goulds back pull-out removal device provides the safest known method for installation and removal of the back pull-out assembly and was developed to meet safety requirements. Other methods for removal and installation of the back pull-out do not incorporate these safety features, and are not recommended. ITT Industries - Goulds Pumps assumes no liability for avoiding this practice.

Simplicity of design allows complete removal of the Model 3910 back pull-out assembly safely and quickly. Components of the standard Goulds back pull-out removal device are shown in Fig. III-A, and are:

Back pull-out removal device frame

½ in. - 13 eye nut (1)

•

½ in. bolt (1)

•

½ in. washers (2)

•

¾ - 10 bolts (2)

•

¾ - 10 nuts (2)

•

¾ in. washers (4)

•

½ in. hex cap screws (4)

•

½ in. coupling nuts (2)

•

½ in. jam nuts (2)

•

½ in. eyebolt (1)

•

3910-11th IOM 5/08 75

Spherical washer (1)

•

¾ in. sleeve (1)

•

Bearing frame brackets (2)

•

½ in. threaded rod (2 parts)

•

Fig. III-A

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The optional, adjustable removal device (Fig III-B) replaces the standard one-piece removal device with a two-piece, adjustable unit which can accommodate less headroom (with smaller drivers), and greater length (for longer drivers).

PREPARATION FOR REMOVALOF BACK PULL-OUT ASSEMBLY

1. Valves must be closed and liquid drained from pumps, as indicated in Disassembly section.

2. Auxilliary piping, tubing and equipment that could interfere with removal of the back pull-out must be removed, as indicated in Disassembly section.

3. Coupling guard must be removed, as described in Appendix I.

4. Coupling spacer must be removed, as described in Appendix I.

5. Seal chamber cover / casing stud nuts (425) must be removed, and jacking bolts (418) tightened to separate back pull-out from casing (100), as indicated in Disassembly section.

ASSEMBLY OF GOULDS BACK PULL-OUT REMOVAL DEVICE

Standard

1. Thread ½ in. hex jam nut on eyebolt until approximately 1 in. (25mm) of threads remain between the nut and the end of the eyebolt.

Fig. III-B

Additonal parts are:

Back pull-out removal device (upper and lower halves) -

•

replaces standard frame.

½ in. bolt (2)

•

½ in. washers (4)

•

½ in. nuts (2)

•

2. Thread one ½ in. coupling nut on eyebolt and tighten against jam nut.

3. Thread ½ in. hex nut on threaded rod until approximately 1 in. (25mm) of threads have been revealed between the nut and end of the threaded rod.

4. Thread rod into coupling nut until jam nut contacts coupling nut.

5. Tighten jam nut against coupling nut.

6. Insert sleeve through eye of eyebolt.

7. Place one bracket around sleeve so that large holes in bracket align with holes in sleeve.

8. Insert one ¾ in. bolt through washer, brackets and sleeve.

9. Place ¾ in. washer and nut on exposed, threaded end of bolt and tighten nut against washer.

10. Place second bracket around sleeve in lower leg of removal device so that large holes in bracket align with holes in sleeve.

11. Insert second ¾ in. bolt through washer, bracket and sleeve.

12. Place ¾ in. washer and nut on exposed, threaded end of bolt and tighten nut against washer.

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13. Place ½ in. bolt through washer and appropriate hole in upper leg of removal device.

NOTE: Generally, the second hole from the open end of the upper portion of the removal device gives best results. Other holes have been provided for individual adjustments.

14. Place ½ in. washer onto exposed, threaded end of bolt, thread on ½ in. eye nut and tighten against washer.

Optional (Adjustable)

1. Follow steps 1-14 as described under Standard.

2. Measure distance between lower mounting bracket location on bearing frame (228) and top of driver.

3. Insert lower half of removal device into upper half until measured distance between bracket and upper leg is equal to the distance measured in Step 2.

4. Extend length of removal device by pulling lower half from upper half until next set of adjusting holes in upper and lower halves align.

5. Insert two ½ in. bolts through washers and adjusting holes in upper and lower halves of removal device.

6. Place ½ in. washer and nuts on exposed, threaded ends of two bolts and tighten nuts against washers.

REMOVAL OF BACK PULL-OUT ASSEMBLY

1. Remove grease fittings or oil mist connections (193) from bearing frame (228).

2. Fasten upper (first) bracket assembly to upper machined boss on bearing frame (228) with two ½ in. bolts (Fig. III-C).

Fig III-C

7. Place spherical washer (two pieces), ½ in. flat washer and second ½ in. coupling nut on exposed end of threaded rod and tighten nut against washer.

NOTE: At this point, upright of removal device should be vertical and parallel with centerline of shaft. If not, determine cause and correct.

8. Lift back pull-out assembly/removal device assembly vertically until seal chamber cover/ stuffing box cover (184) clears casing studs (356A) (Fig III-D).

3. Rig sling to eye nut installed in upper leg of removal device and to overhead lifting device.

4. Lift removal device and bracket assembly with overhead lifting device and position lower bracket on lower machined boss of bearing frame (228) so that holes in bracket align with threaded holes in frame.

5. Fasten lower (second) bracket to lower machined boss on bearing frame (228) with two ½ in. bolts.

6. Guide threaded rod through mating hole in upright portion of removal device while raising upper leg.

Fig III-D

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Do not allow coupling halves or other components to make contact, as damage to coupling and/or other components could result.

9. Tighten coupling nut on threaded rod to tilt top of back pull-out assembly towards upright of removal device (Fig III-E).

10. Repeat steps 8 and 9 until seal chamber cover/ stuffing box cover (184) aligns with cutout in motor support (240) and coupling clears top flange of motor support.

CAUTION

Fig III-F

NOTE: In some cases, it may be necessary to loosen the coupling guard end plate from the thrust bearing end cover to gain sufficient clearance. Follow coupling guard installation and disassembly instructions in Appendix I.

11. Move bearing frame assembly/removal device assembly horizontally until clear of motor support (240) (Fig III-F).

Fig III-E

NOTE: With experience, maintenance personnel will understand the interactions between vertical and rotational movements of the bearing frame assembly/removal device assembly and will make adjustments appropriately.

12. Follow the remaining instructions in Disassembly.

INSTALLATION OF BACK PULL-OUT ASSEMBLY

Reverse steps in Removal of Back Pull-Out Assembly, previously described in this appendix.

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HOW TO ORDER PARTS

When ordering parts, call

1-800-446-8537

or your local ITT Industries - Goulds Representative

EMERGENCY SERVICE

Emergency parts service is available

24 hours / day 365 days / year...

Call 1-800-446-8537

Visit our website at www.gouldspumps.com.

a subsidiary of ITT Industries, Inc.

Goulds Pumps 3910 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual