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ITT Goulds Pumps 3755 Installation, Operation And Maintenance Manual

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Installation, Operation, and
Maintenance Manual
Model 3755

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Summary of Contents for ITT Goulds Pumps 3755

  • Page 1 Installation, Operation, and Maintenance Manual Model 3755...

  • Page 3: Table Of Contents

    Table of Contents Table of Contents 1 Introduction and Safety ............................ 3 1.1 Important Safety Notice..........................3 1.2 Safety warnings............................3 1.3 Safety ................................ 4 1.4 General precautions ..........................5 1.5 ATEX Considerations and Intended Use....................8 1.6 Parts ................................9 2 Installation................................
  • Page 4 Table of Contents 7 Care and Maintenance ............................ 27 7.1 Lubrication............................... 27 7.2 Repacking stuffing box ..........................27 7.3 Replacing shaft sleeve ..........................27 7.4 Sectional views, parts list and interchangeability tables ................. 29 7.5 Wearing rings ............................31 7.6 Replacing impeller........................... 32 7.7 Replacing shaft or bearings........................

  • Page 5: Introduction And Safety

    ITT Goulds pumps will provide safe, trouble-free service when properly installed, maintained, and operat- 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.

  • Page 6: Safety

    Trapped liquid can rapidly expand and result in a violent explosion and injury. ITT Goulds Pumps will not accept responsibility for physical injury, damage, or delays caused by a failure to observe the instructions for installation, operation, and maintenance contained in this Pump Safety Manual or the current IOM available at http://www.gouldspumps.com/literature.

  • Page 7: General Precautions

    Personal injuries will result if procedures outlined in this manual are not followed. ITT Goulds Pumps will not accept responsibility for physical injury, damage or delays caused by a failure to observe the instructions in this manual and the IOM provided with your equip- ment.
  • Page 8 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.
  • Page 9 1.4 General precautions WARNING Make sure to properly lubricate the bearings. Failure to do so may result in ex- cess heat generation, sparks, and / or premature failure. CAUTION The mechanical seal used in an ATEX classified environment must be proper- ly certified.

  • Page 10: Atex Considerations And Intended Use

    Maintenance manual (IOM) can cause serious personal injury or damage to the equipment. This in- cludes 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.

  • Page 11: Parts

    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.

  • Page 12: Installation

    2 Installation 2 Installation 2.1 Location Pumping unit should be placed as close as practical to the source of supply. Always allow sufficient head room to remove the upper half casing of the pump and the rotating element. Floor space allotted to the pumping unit should be sufficient for inspection and maintenance.

  • Page 13: Alignment - Initial

    2.3 Alignment - initial NOTICE: Final tightening of foundation bolts is done after grout has set 48 hours. Figure 3: Grouting Unit on Foundation: Build wood dam around foundation as shown in Figure 2: Foundation on page 10. Wet top sur- face of concrete foundation thoroughly.
  • Page 14 2.3 Alignment - initial Tighten pump and driver hold-down bolts. Check gap and angular misalignment, shaft axes concentric but not parallel. Coupling other than spider-insert type. The normal gap (distance between coupling halves) is 1/8". Check angular misalignment by inserting a feeler or taper gauge at four points on the circumference of the coupling halves at 90 degree intervals.
  • Page 15 2.3 Alignment - initial Figure 5: Checking angular alignment, spider-insert type Check parallel misalignment: shaft axes parallel but not concentric, by laying a straight edge across both coupling rims at top, bottom and both sides. See Figure 6: Checking parallel align- ment on page 13.

  • Page 16: Piping - General

    2.4 Piping - general Thin shim should be used under the driver feet to establish parallel alignment. (In some instances, shims may be required under the pump feet). Alignment in one direction may alter the alignment in another. Check through each alignment pro- cedure after making any alignment alteration.

  • Page 17: Piping - Discharge

    2.6 Piping - discharge Figure 7: Pipe submergence and entrance calculation 2.6 Piping - discharge A gate valve and a check valve should be installed in the discharge line. The check valve should be located between the gate valve and pump to permit inspection of the check valve. The gate valve is required for priming, regulation of flow capacity and for inspection and maintenance of the pump.

  • Page 18: Connection Of Piping

    2.7 Connection of piping 2.7 Connection of piping Connect suction and discharge piping. Rotate the pump shaft by hand several complete revolutions to be sure that there is no binding and that all parts are free. Recheck alignment as described in Section Align- ment - initial.

  • Page 19: Preparation For Operation

    3 Preparation for Operation 3 Preparation for Operation 3.1 Pump bearings Grease lubricated bearings Sufficient lubricant is inserted at the factory for 2000 hours of operation. Oil lubricated bearings Remove adjustment assembly from oiler. Adjust bars to Dim. A. Lock in position. Replace adjustment assembly in oiler.

  • Page 20: Driver Bearings

    3.2 Driver bearings Fill the oiler bottle with the proper grade of oil, and replace in the oiler. The frame is filled when an oil level remains in the bottle. Several fillings of the bottle may be required. Never fill the frame through the breather (113-A) or through the oiler without use of the bottle.

  • Page 21: Connection Of Sealing Liquid Or Greased Lubricator (Packed Box)

    3.4 Connection of sealing liquid or greased lubricator (packed box) source. The flush liquid keeps the solids in the pumpage away from the seal faces. A restricting bushing in the bottom of the stuffing box is used to control dilution of pumpage. Flush liquid pres- sure should be great enough to ensure steady flow into the stuffing box.

  • Page 22: Connection Of Drain Piping

    3.7 Connection of drain piping Between 220ºF and 250ºF. Between 250ºF and 350ºF, in addition to gland quenching. The inlet piping must be at the bottom and the outlet at the top as shown in the sectional assembly , refer 7.4 Sectional views, parts list and interchangeability tables on page 29.

  • Page 23: Starting Pump

    4 Starting Pump 4 Starting Pump 4.1 Priming The pump must always be fully primed, all air removed and the suction pipe full of liquid, before pump is started. If the pump is run dry, the rotating parts within the pump may gall and seize to the stationary parts as they depend on liquid being pumped for lubrication.

  • Page 24: Operation

    5 Operation 5 Operation 5.1 Stuffing box Stuffing Boxes with Packing Rings - Less Quenching Gland and grease lubricator: Periodically inspect stuffing box to see that there is sufficient leakage to lubricate the packing and maintain a cool box. Never draw up packing so that the stuffing box heats, as this will cause damage to both packing and shaft.

  • Page 25: Operating At Reduced Head

    5.3 Operating at reduced head 5.3 Operating at reduced head On motor driven pumps, when discharge head or pressure is allowed to drop considerably below the rat- ed point for any length of time, the motor should be watched for heating because the pump capacity in- creases rapidly with reduced head, as does horsepower consumption.

  • Page 26: Trouble Check List

    6 Trouble Check List 6 Trouble Check List 6.1 No liquid delivered Pump not primed - casing and suction pipe not completely filled with liquid. Speed too low*. Discharge head too high. Check system head (particularly friction loss). Suction lift too high (suction pipe may be too small or long, causing excessive friction loss). Check with vacuum or compound gauge.

  • Page 27: Pump Works A While And Then Quits

    6.4 Pump works a while and then quits Air or gases in liquid. Impeller diameter may be too small. Mechanical defects: • Impeller clearance too great • Impeller damaged Wrong direction of rotation or impeller installed backwards. Be sure pressure gauge is in correct place on discharge nozzle or discharge pipe. * When directly connected to electric motors, check whether motor wiring is correct and receives full volt- age.

  • Page 28: Pump Is Noisy Or Vibrates

    6.7 Pump is noisy or vibrates 6.7 Pump is noisy or vibrates Hydraulic noise - cavitation, suction lift too high. Check with vacuum or compound gauge. Mechanical defects: • Shaft bent • Rotating parts bind, are loose or broken • Bearings worn out •...

  • Page 29: Care And Maintenance

    7 Care and Maintenance 7 Care and Maintenance 7.1 Lubrication Grease lubricated bearings. As specified in 3.1 Pump bearings on page 17, bearings are lubricated at the factory for 2000 hours or three months service. Do not grease at too frequent intervals. It is suggested that addi- tional or replacement lubricant be added only after 2000 hours operation or at three month inter- vals.
  • Page 30 7.3 Replacing shaft sleeve Figure 10: Impeller puller Remove stuffing box gland (107). Remove bolts (370B) and pull casing (100) from frame (228). Remove stuffing box packing and lantern ring (105) from casing. Retain lantern ring. Loosen set screw in deflector (123) until deflector will rotate on sleeve. By use of a suitable puller similar to that shown in Figure 11: Shaft sleeve puller on page pull shaft sleeve (126) from shaft.

  • Page 31: Sectional Views, Parts List And Interchangeability Tables

    7.4 Sectional views, parts list and interchangeability tables 7.4 Sectional views, parts list and interchangeability tables Sizes - with two casing wearing rings 2x2-7, 3x3-5, 1-1/2x2-9, 2x2-1/2-9, 2-1/2x3-9, 2x3-7, 3x4-7, 4x5-7, 5x5-7, 6x6-9, 2-1/2x3-11, 3x4-11, 4x6-11H, 8x8-11, 2-1/2x3-13, 3x4-13, 4x6-13, 4x6-13L, 6x8-13 Model 3755 Installation, Operation, and Maintenance Manual...
  • Page 32 7.4 Sectional views, parts list and interchangeability tables Sizes - with suction wearing ring only 1-1/4x1-1/2-5, 1-1/4x1-1/2-7, 1-1/4x1-1/2-8, 1-1/2x2-5, 2-1/2x2-1/2-6, 4x4-7 Oil lubricated bearing construction Model 3755 Installation, Operation, and Maintenance Manual...

  • Page 33: Wearing Rings

    7.5 Wearing rings 7.5 Wearing rings Casing wearing rings are provided for both hubs of the impeller on some sizes and only on the suction hub on others. Refer to section vi-d. These rings allow a small clearance to be maintained between the Model 3755 Installation, Operation, and Maintenance Manual...

  • Page 34: Replacing Impeller

    7.6 Replacing impeller rotating impeller and the stationary casing wearing rings. For proper hydraulic performance these clear- ances should be maintained as indicated below. Ring should be replaced when clearances have worn to those listed under replacement clearance. Table shows original clearances and suggested replacement clearances as follows: Table 3: Recommended clearances Diametrical Clearance (inches) Ring Bore Dia.

  • Page 35: Replacing Shaft Or Bearings

    7.7 Replacing shaft or bearings Push impeller on the remaining distance with impeller nut (304) and washer (199). Replace suction cover (182) and nuts on studs (356). Connect suction piping. Start pump as directed in Starting Pump. 7.7 Replacing shaft or bearings For grease lubricated bearings: Shut off and disconnect all piping.
  • Page 36 7.7 Replacing shaft or bearings Figure 12: Exploded assembly It is important that all parts are free from dirt and grit while being assembled. Note that these bearings are shielded on one side to retain the grease and they must be installed properly as shown in 7.4 Sectional views, parts list and interchangeability tables on page To replace the ball bearing-inboard end (168), oil shaft at bearing seat and slide bearing over the...
  • Page 37 7.7 Replacing shaft or bearings Table 4: Impeller locating table Size Size 1 ¼ x 1 ½-5 1/16 2 ½ x 3-9 1 ¼ x 1 ½-7 1/16 2 ½ x 3-13 1/16 1 ¼ x 1 ½-8 3/16 3 x 4-7 1 ½...

  • Page 38: Replacing Casing

    7.8 Replacing casing For oil lubricated bearings: Follow steps 1 through 4 as for grease lubricated bearings. Remove constant level oiler (251). Turn down oil pipe (190). Remove drain plug and drained oil from oil reservoir in frame (228A). Follow steps 5 through 12 as for grease lubricated bearings. Using a suitable bearing puller, remove inboard ball bearing (168A).

  • Page 39: Instructions For Ordering Spare Parts

    7.10 Instructions for ordering spare parts One set of group parts should be maintained for every one to three pumps of that particular group size in operation. Pumps of the same group size have all parts interchangeable except casing, suction cover, impeller and wearing rings, see interchangeability table in 7.4 Sectional views, parts list and interchangeability tables on page 29.
  • Page 40 Visit our website for the latest version of this document and more information: http://www.gouldspumps.com Goulds Pumps Inc. 240 Fall Street Seneca Falls, NY 13148 Form IOM.3755.en-US.2021.09 ©2021 ITT Corporation The original instruction is in English. All non-English instructions are translations of the original instruction.

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