impeller hub

8/12/2019 Impeller Hub

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SERVICE

INSTRUCTIONSFOR HSAB/HSNB SERIES MIXER

Customer Name:Tag:

Serial No.: Size/Type:

Reduct ion Ratio:

Motor HP: Input RPM:

Output RPM:

AGMA S.F.:

OFFICES IN:

Hayward Gordon Ltd. 5 BRIGDEN GATE

HALTON HILLS, ONL7G 0A3 CANADA

PHONE: (905) 693-8595FAX: (905) 693-1452

VANCOUVER604-986-8764

CALGARY403-253-2737

MONTREAL514-697-6445


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HAYWARD GORDON LTD PAGE: 1.1ISSUED: 09/00

Copyright 2002 Hayward Gordon Limited Specifications subject to change without prior notice

MAINTENANCE INSTRUCTIONSHSAB / HSNB SIDE ENTRY MIXERS

TABLE OF CONTENTS

Side Entry Model Designation 1.2Initial Inspection 1.3Storage 1.3General 1.3Motors 1.3Belt Drive 1.3Seals 1.4Shafts and Impellers 1.4

Installation and Operation General 1.4

Mixer Assembly 1.5

Installation Mounting 1.6 Motors 1.6 V-Belt Drives 1.6 Stuffing Box 1.7 Seal Flush 1.8 Mechanical Seals 1.8 Mechanical Seal Lubricator 1.9

MaintenanceRepacking Instructions HSAB 1.9Procedure 1.9-1.10Mechanical Seal Replacement Instructions 1.10Procedure 1.10-1.11Bearing Lubrication 1.11

Trouble Shooting 1.12-1.13

APPENDIXParts ListsTypical Dimensions

Impeller instructions AL Hydrofoil impeller drawingMotor InstructionsSheave/V-Belt InstructionsBearing Instructions


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SIDE ENTRY MODEL DESIGNATION

Model number format

HS B - -

Size and Output rpm designation

HP designation

A designation for stuffing box units,N designation for mechanical seal units

Please provide complete Mixer Model Number and Mixer Serial Number when information or service is required. The mixer nameplate information shouldbe copied on to the cover of this manual for quick future reference.


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INITIAL INSPECTION

Care should be exercised in uncrating and handling. Miscellaneous parts (turbinehubs, turbine blades, propellers, fasteners,coupling hubs, etc.) may be boxed

separately and attached to the crate or may be wired or bolted to the crate. DONOT DISCARD PACKAGING without carefully making sure that all mixer partshave been removed. The unit should be inspected carefully and any shippingdamage should be reported to Hayward Gordon Limited. A claim should be filedimmediately with the carrier involved.

Damage resulting from improper handling can affect the operation and life of your Hayward Gordon Mixer. Particular care should be taken to prevent bending theshaft, which has been straightened within 0.003" TIR . Never lift or support theunit by the end of the shaft.

STORAGEGENERAL

For storage of the mixer, do not remove the protective coating. Add additionalprotective coating as may be required for the condition and period of storage.Store the unit in a clean, dry locationwhich is free from wide variations intemperature.If an indoor area is not available with temperature and humidity control, the nextbest option, is indoors without these controls.In this case, wrap the motor in plastic with desiccant bags inside and replace thedesiccant bags monthly. Outdoor storage is not recommended. If outdoor storageis unavoidable, keep all of the mixer components off the ground on skids or platforms and cover the equipment with a waterproof covering while still allowinggood air circulation. Independent of storage location, the mixer shaft should berotated by hand every 2 weeks with grease added to both bearings every 3months.

MOTORS

Variations in temperature, combined with a moist atmosphere result incondensation both inside and outside of the motor. When storage is necessary,select a clean, dry location which is not subject to rapid or wide variations intemperature and vibration free. Air should be permitted to circulate freely throughthe storage area. Rotate the motor shaft several revolutions every 3 weeks to

redistribute grease in the bearings and re-lubricate bearings at six monthintervals. Storage of motors outdoors is not recommended.Before putting into service, after sitting outside for a considerable period of time, thewinding insulation resistance should be tested and if this reading is below one mega-ohm,move to a warm dry place and leave until the insulation resistance rises.


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STORAGE

Belt drive units should be stored in a clean, dry location free from direct light. The

shelf life of standard belts vary; but they should be replaced before placing theunit in operation if stored for longer than 4 months.

SEALS

Double mechanical seal housings and lubricators are shipped from the factorysparayed internally with rust preventative/lubricant which is compatible with thesealing fluid to be used. Where water is to be used as a seal lubricant, it isrecommended that seal housings and lubricators be of stainless steel. If steel hasbeen specified the seal housings and lubricators should be filled with an ethyleneglycol/rust preventative solution, prior to storage or operation.

SHAFTS and IMPELLERS

The shaft in your Hayward Gordon mixer was straightened at the factory to withina few thousandths of an inch. Care should be taken in storage to see that theshaft is fully supported along its length and to ensure heavy items are not placedon un-suppported sections of the shaft.For outdoor storage of carbon steel shafts and impellers, a suitable grease or rustpreventative should be applied.

INSTALLATION AND OPERATION

GENERAL

Proper installation and operation is the key to long trouble free mixer service. Thefollowing is a list of points to cover.1. Check for proper rotation of shaft before permanently wiring the motor.2. Read all tags, nameplates and this manual prior to start-up.3. Check operating full load motor amperage against motor nameplate.4. Do not operate in a fluid other than the specific gravity and viscosity it wasdesigned for.5. Do not start-up unit with the impeller buried in solids or in a "set up" fluid.6. Maintain operating temperatures and pressures of vessel within designlimitations for stuffing box and mechanical seal units.

7. A minimum 4" radial clearance is required between the tank internals and themixer wetted parts.8. NOTIFY Hayward Gordon Ltd. prior to any modifications made.


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MIXER ASSEMBLY

All units are completely assembled except for the following items:

1. Tie rods or pipe supports.2. For bolted blade impellers, bolt blades to the hub ears using hardwaresupplied and torque values as shown in Appendix (Impeller location). Impellersturning at speeds higher than 100 rpm are statically balanced.

Both stuffing box and mechanical seal units mount directly to the vessel nozzleusing standard ASA flange sizes. When properly installed, the mixer weightshould be distributed between the mounting nozzle and the outboard support. Inmounting the unit, block it in position allowing the flange bolts to draw up freely.Then affix the tie rod or pipe leg support and draw up snug. Tie rod shoes arenormally located "to suit" at installation -- their exact positions can be given for a

particular application, however upon request.

No tank baffles are required. Mixer to be mounted 7 to 8 degrees off tank center,either direction. Mount mixer shaft one impeller diameter off tank bottom.

Install the impeller with the concave side of its blades (hydrofoil style) away fromthe driver. Rotate the shaft by hand before applying power; to be sure there areno obstructions. Proper rotation is indicated by an arrow on the nameplate

INSTALLATION

MOUNTING

The most frequent cause of mechanical difficulty with a mixer is improper mounting. During normal operation of your mixer, the random fluid motion in thevessel can exert significant forces on the mixer shaft. The mixer has beendesigned to accomodate these forces; and, as a result, the forces are transmitteddirectly to the support mounting. The mounting system, therefore, must be rigidenough to support not only the dead mixer weight, but also the live mixer reactions as a result of Torque and Bending Moment.DO NOT RUN MIXER IN AN EMPTY TANK OR WHEN THE LIQUID LEVEL ISNEAR THE IMPELLER.


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INSTALLATION

MOTORS

Ample circulation of air during operation is very important in securing fullperformance and long life from an electric motor. Minimize obstruction to freecirculation in areas where motors are installed. Avoid choking off the suctioninlets on fan cooled motors. The allowable temperature is stamped on the motor nameplate. Life of the motor will be decreased if its temperature during operationexceeds the rated temperature for the class of insulation used within the motor.The maximum temperature measured with a thermometer or surface pyrometer on the exterior of the motor should not exceed 90 oC for class A insulation, 110 oCfor class B insulation and 150 oC for class C insulation. A motor can be withinthese temperature ratings and yet be too hot to touch.Overload protection should always be provided to avoid motor damages duringtemporary overloads, jams or other mishaps. Overload heater elements for

starters are sized from the motors rated full load current, which appears on thenameplate.

V-BELT DRIVESBelt driven mixers are shipped with the belts installed under proper tension, readyto operate. No attention is required until a few days of operation seats the belts inthe sheave grooves. The drive centre distance should then be adjusted for proper belt tension. Avoid installing the unit where proper ventilation of the drive isblocked. Belts generate heat during operation where proper circulation of air isnecessary. If belts slip, they require adjustment. If the belts are dirty, wipe cleanwith a clean dry cloth. NEVER USE A BELT DRESSING. During maintenanceand lubrication be careful not to drip oil on the belts.

If motor is being supplied by others and mounted at installation, use the followingprocedure.1. Remove belt guard and mount motor. Motor shaft must be parallel with theagitator shaft.2. Install driver sheave on motor shaft. Align sheaves with a straight edge toinsure proper tracking of belts.3. Inspect sheaves carefully. Wipe off dust and smooth rusted spots. Sheavegrooves must be free of burrs and rough places, which will greatly accelerate beltwear.4. Shorten center distance until belts can be installed easily. Never pry or stretch

belts to get them into sheave grooves.5. Install belts and adjust center distance for proper belt tension. Tension iscorrect when a slight bow is observed on the slack side with unit running. Another way of testing belt tension is to turn unit off and deflect each belt inward with thethumb. Tension is correct when each belt deflects approximately one beltthickness under thumb pressure.


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INSTALLATION

STUFFING BOX

Hayward Gordon agitators employing stuffing box shaft seals are shipped with theproper amount and type of packing installed. The gland, however, is looselyadjusted. It will require attention as soon as the vessel is pressurized, or filled , if shaft entry point is below the liquid level. Start the agitator and tighten glandadjusting nuts gradually and evenly until leakage has almost stopped. Do notovertighten -- a light amount of leakage (one to three drops per minute) isnecessary for proper operation. Over-tightening will cause excessive temperaturerise, shorten packing life, and may overload the motor on smaller units. Frequentadjustments will be necessary the first few days.

Stuffing box type shaft seals require extreme care during initial installation andoperation if proper packing life is to be realized. Six (6) ring stuffing boxes are

equipped with a lantern ring which distributes lubricant to the packing duringoperation. These boxes are fitted with a lube fitting and relief plug. Prior tooperation, a lubricant which is compatible with the process fluid, should bepumped into the lube fitting until lubricant is evident at the relief plug. In order toobtain proper sealing from a stuffing box the packing must be allowed to "run in".Prior to operation, the gland plate nuts should be snugged up, but do notovertighten. Always tighten evenly to avoid cocking the gland. Usually 1/3 to 1/2turn on each nut will stop leakage. Always strive for satisfactory sealing with theleast gland force possible.

As the unit is started up the packing should be allowed to "run in", by snugging upthe gland plate nuts every couple of hours until the desired level of sealing isreached. Once the packing has been "run in" the gland nuts should beretightened on a regular basis which can be from weekly to monthly dependingupon the desired level of sealing.

It is most important that the shaft be running true and concentric with the stuffingbox bore. Typical shaft indicated runout is 0.002" or 0.003" -- the stuffing box willnot function properly if runout exceeds 0.005" on small (1 1/2") shafts; 0.008" onlarge (4") shafts. If runout is excessive, check coupling for loose fastenings andshipping crate for possible damage during shipment. If shaft is bent notify your Hayward Gordon representative immediately.

If required, an optional stuffing box water cooling jacket is supplied. Water shouldbe piped to the cooling jacket, and whenever the unit is operating a 1/4 to 1/2GPM flow of cool (approximately 85 oF) water should be supplied to the jacket.1/4" NPT supply and return connections are provided.


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SEAL FLUSH.

When required in slurry applications, etc., a seal flush feature is provided to aid in

keeping foreign material away from the shaft seal. This consists of a cavity and liptype throttling seal inboard of the shaft seal. Clean water (or other fluid compatiblewith the process) is pumped into the flush cavity at a pressure slightly higher thanthe process fluid pressure.

MECHANICAL SEALS

The mechanical seal in your Hayward Gordon agitator is assembled, adjusted,and ready to operate when received. Installation consists of mounting unit onvessel, assembling shaft, (if shipped disassembled), and making the necessarycoolant lubricant connections, if a double mechanical seal type is provided.Special care should be exercised in handling. Any type of shock is to be avoided -

- the carbon seal faces are fragile and can easily be damaged.

Units having single mechanical seals (standard design on the side entry mixers)must not be operated until vessel liquid level is above seal. NEVER OPERATEMECHANICAL SEAL DRY.

Double seals must be provided with a supply of lubricant between the two seals atapproximately 20 psi in excess of the vessel pressure. The purpose of this fluid isthreefold: 1) to lubricate the seal faces, 2) to carry friction generated heat awayfrom the rubbing faces, and 3) to equalize pressure across the inboard seal.

A light oil is the best coolant-lubricant, but water or the process fluid may be used,so long as it remains in the liquid state at the pressure and temperatureconditions existing at the seal faces. For outdoor operation the lubricant shouldcontain antirust preventative or be a water/glycol mixture. Be sure lubricant linesare absolutely clean before starting the system. A flow rate of at least 1/4 gallonper minute is recommended. Always be sure circulating system is turned onbefore the agitator.NEVER PRESSURIZE THE VESSEL WITHOUT FIRST APPLYING PRESSURETO THE SEAL HOUSING IN A DOUBLE MECHANICAL SEAL.

Seal leakage indicates the need for replacement of worn or damaged parts.Follow Hayward Gordon removal and replacement instructions for the particular unit involved. Always handle seal parts with extreme care, paying particular

attention to the lapped seal faces and packing members. Before reassembling,inspect shaft carefully for burrs and longitudinal grooves. Smooth any roughspots, keyway edges, etc., which might cut shaft packing member as seal is slidover shaft. Duplicate exactly the original positions of members, so that springtension is correct.


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It is recommended that a complete spare seal be carried in stock, so anydamaged part can be quickly replaced. Ordering from Hayward Gordon will insurereceipt of the correct seal parts.

MECHANICAL SEAL LUBRICATOR (DOUBLE SEALS)

Before operating, fill reservoir to mark on sight glass with a light oil. Use a light oil(SAE 10 approx.) or water/glycol combination with anti rust preservative. Connectcooling line to connection at top of the lubricator, and drain line to connection atbottom. For this closed loop lubricator system, gravity flow and heat transfer byconvection in most cases is adequate. Connect a pressure source 5 to 25 psiabove tank pressure to the connection at top of reservoir. Seal will operatesatisfactorily if this pressure source is equal to the tank pressure.

MAINTENANCE

REPACKING INSTRUCTIONS (HSAB)

Hayward Gordon model HSAB side entering agitators are equipped with a specialdevice which permits the stuffing box to be completely repacked without drainingthe vessel. The procedure is simple and the action positive. It is, of course, notnecessary to utilize this feature when the tank is empty.

A collar is fixed to the agitator shaft, adjacent to the mounting flange, on the tankside. Fitted on the shaft between this collar and the flange is the repack 'O' ring.Operating clearance between the 'O' ring and face of the mounting flange isapproximately 3/16". When the shaft is retracted by a mechanism at the rear of the unit, this 'O' ring is squeezed between the collar and the mounting flange.Thus, an auxiliary seal is formed, permitting the stuffing box to be repackedwithout draining the vessel.

PROCEDURE REFER TO MODEL HSAB PARTS LIST, SE-101.

1. With the unit turned off, remove belt guard, exposing retracting bolt, (Part#7).

2. Loosen set screws holding shaft in inboard bearing (Part #10), and thoseholding the shaft in the retractor tube (Part#36).

3. With a screwdriver, remove the "spirolox" shaft positioning ring (Part#12)from its groove and slide it forward on the shaft. Shaft is now free to slide axially.

4. With an Allen Wrench, turn retracting bolt (Part#7) clockwise until shaftretracts approximately 3/16" and a positive stop is felt. The shutoff device is nowactivated.


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5. Repack the stuffing box. Remove gland plate nuts, move gland plate awayfrom working area, remove split gland. Finally remove the first three packingrings, then the lantern ring can be removed. Remove the remaining packing rings.In reverse order install new packing rings, see installation of stuffing box seals for

details.6. Reverse the procedure of Steps 1 through 4. The shaft positioning ring mustbe reseated in its groove and seated against the retractor sleeve (Part#36), whenthe setscrews are retightened. This sets the proper shaft operating position.

MAINTENANCE

MECHANICAL SEAL REPLACEMENT INSTRUCTIONS (HSNB)

Hayward Gordon model HSNB side entering agitators are equipped with a specialauxiliary sealing device which permits changing of worn mechanical seal parts

without draining the tank contents. This procedure must be followed to removethe seal, even if the tank is empty.

A collar is fastened to the shaft just forward of the mounting flange. An O-ringunder the collar prevents leakage between collar and shaft during thereplacement procedure. When the shaft is retracted by a mechanism at the rear of the agitator, the collar enters the mounting flange bore before the mechanicalseal gland leaves it, thus positively sealing the vessel during seal replacement.The shaft is supported in its retracted position during the seal change by rotatingit fully clockwise or couterclockwise engaging positive lock mechanism.

PROCEDURE REFER TO MODEL HSAB PARTS LIST, SE-100.

1. With the unit turned off, remove the V-belt gaurd, exposing retracting bolt(Part#7).

2. Loosen set screws holding shaft in the retractor sleeve (Part#36).

3. With a screwdriver, remove the "spirolox" shaft positioning ring (Part#12)from its groove and slide it forward on the shaft. Shaft is now free to slide axially.

4. Remove the four bolts holding the inboard bearing and mechanical sealgland on to the mounting flange. The entire shaft-mechanical seal assembly is

now free to slide axially.

5. With an Allen Wrench, turn the retracting bolt (Part#7) clockwise until theshaft moves backwards approximately 1-1/4", and a positive stop is felt. Theauxiliary seal is now actuated.


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6. Remove the bolts from the shaft coupling, and remove the retaining ringbehind the retracting bolt. The drive shaft may now be manually slid towards therear, out of the way.

PROCEDURE REFER TO MODEL HSNB PARTS LIST, SE-100.

7. Remove the bolt and washer holding the forward shaft coupling half onto theshaft, and remove the coupling half -- this is a tapered fit and should bump looseeasily with a mallet.

8. Loosen set screws holding seal gland bearing on shaft, and slide thisbearing off end of shaft.

9. Slide seal gland off end of shaft. Now remove the mechanical seal parts,

inspect, and replace as necessary.

10. Reassemble in reverse order, being sure all parts are clean and welllubricated. The shaft positioning ring (Part#12) must be re-seated in its grooveand seated against the retractor sleeve (Part#36), when the setscrews areretightened. This sets the proper shaft operating position.

CAUTION:If unit is equipped with a lubricator (double mechanical seal), this must be de-pressurized and the seal cavity de-pressurized prior to disassembly. Similarly,prior to replacing before operation, pressurize the seal cavity and lubricator before starting unit.

BEARING LUBRICATION

Both shaft Bearings are grease lubricated and are shipped with grease applied.However, we recommend that additional grease be added to ensure adequatelubrication. See the attached SealMaster Instructions for Greasing Intervals,Procedures and Type.


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TROUBLE SHOOTING

The mixer should be checked often for abnormal temperatures, oil leaks,abnormal noise, vibration etc. In the event of difficulties, the unit should be shut

down immediately. The following trouble shooting table should be reviewed and if no solution is obvious, contact Hayward Gordon Limited.

TROUBLE WHAT TO INSPECT ACTION

1. Worn or damaged parts a) Check bearings and gears for excessive wear. Replaceworn parts.b) Attempt to find cause of wear.c) Check for abrasives in grease, inadequate or improper grease. Overload, incorrect rotation, excessive shock, etc..

2. Overloading Overloading can cause loud operation. Check process

fluid, mixer speed, impeller diameter against unit assemblydrawing.

3. Worn or improperly installedor maintained couplings

Couplings can generate noise.Check for proper alignment, or worn parts.

4. Structure amplification. Steel mounting structures and nozzles can act as adiaphragm and amplify small amounts of normal noise.This can only be correctedby adding additional stiffness to the structure or nozzle.

NOISYOPERATION

5. Loose or worn belts. Tighten or replace belts.

1. Incorrect/Insufficient

Lubricant.

Review manual, grease where applicable.

2. Unusual ambient conditions. Units installed in a hot area of a plant where air flow isrestricted can overheat. Remove obstruction and if necessary force circulate air.

3. Improper liquid level. Single mechanical seals require lubrication from theprocess fluid.Double mechanical seals require lubrication from the sealpot.

ABNORMALHEATING

4. Loose belts. Tighten belts.


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TROUBLE SHOOTING, continued

TROUBLE WHAT TO INSPECT ACTION

1. Inspect Impellers Are all blades bolted (bolted construction) securely to theimpeller hub(s) in accordance with match marks?

2. Bolts tightened Be certain that all mounting, and coupling bolts aretightened to the correct wrench torque.

3. Mixer support structure Does the mounting arrangement for the mixer providesufficient support to prevent wobbling or vibration of theassembly, from unbalanced hydraulic forces on theimpeller.

VIBRATION

4. Agitator shaft Agitator shaft should not be bent. The rigid coupling halvesmust be connected according to instructions.

GREASELEAKAGE 1. Worn Lip Seals Replace defective seals.


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HAYWARD GORDON LTD.Impeller Instructions

Carbon and Stainless Steel

Section:Page:Issued: Sept/00

Impeller Blade Torques (A)Dia 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-1/2

Torque ft-lb 43 85 130 200 270 400 500 730

GENERALImpellers from Hayward Gordon Mixers are normally shipped withhubs mounted on the agitator shaft and with blades shipped loose.Blades should be installed in strict accordance with matchmarks, if

any, and with bolts tightened to the torque listed below.

REPOSITIONING OR REMOVALDue to adjustment requirements or special installation procedures,it may be necessary to relocate or even remove the impeller hubfrom the shaft. Your Hayward Gordon impeller hub to shaftclearance is optimized to provide maximum adjustability andsupport with a minimum of fretting. therefore, even slightdistortions and scratches may cause the hub to "hang-up".

If more than one hub is to be removed, check the shaft and hubfor matchmarks. If none, mark clearly with a non-removableindicator, noting which side of the hub is to face up.

It is safest to remove or relocate hubs while the shaft is in thehorizontal position before installation. If they are to be moved whilethe shaft is hung vertically, a safety rope must be tied securelythrough one or more bolt holes and tethered from above to preventdropping or sudden movement.

Before proceeding, remove all scratches and burrs from the shaftover which the hub must pass, as well as the hub bore. Do notuse tools which might contaminate special agitator materials, suchas metal files on stainless steel. Polish the shaft with emery cloth.

Liberally coat the shaft with lubricant such as molybdenum disulphidepaste for ease of sliding.

Back off all setscrews. Rock the hub to loosen and firmly slide the

hub away from pin applying an even load on opposite ears. The hubmay be tapped lightly through a wooden block to aid in thismovement. Heavier hammer blows may cause the bore to close inand grab the shaft. When hub slides clear, remove hook key.

Stop the hub at the first sign of binding on the shaft. Forcing the hubmay induce galling in some materials. making removal even moredifficult. Back off from the binding spot, determine the cause andcorrect it before continuing.

If needed, moderate heat of about 300-350F (light straw temper color) may be applied to the hub O.D. which will expand the bore for removal over high spots. Heat concentrated on the thinner hubsection over the keyslot is most effective. Never allow thetemperature to rise above 450F (dark straw to bluish temper color).When using heat, handle the hub only with heat protecting gloves.

REPLACEMENT AND SECURINGBefore replacing the hub onto the shaft, check the bore for burrs or scratches. Coat the bore and shaft with molybdenum disulphidepaste. If the shaft is hung vertically, attach a safety tether securelythrough one or more bolt holes in the hub and support from above.Install the hub with the side up as indicated by matchmarks. It isusually, although not necessarily, assembled chamferred side first.

Slide the hub to a point above its required position and replace thehook key onto the shaft. Gently lower the hub onto the key until itseats against the pin. Do not drop against the pin. Tighten setscrews to torque listed below.

Install blades and tighten bolts to torques listed below.

Torque values shown are good for standard carbon and stainlesssteel hex head bolts as well as nickel, monel, inconel, and AlloysB,C, and 20 and are based on bolts lightly lubricated in the "as

received" condition. If lubricated with molybdenum disulphide pasteon threads and nut bearing face, bolt torques must be reduced to75% of those tabulated.

All bolts should be tightened by turning nut side only. All bolts should be re-tightened within 1 month after startup and ateach scheduled shut-down.

Set Screw Torques (B)Dia 1/4 5/16 3/8 1/2 5/8 3/4 7/8 1

Torque ft.lb 5.8 11 19 42 82 140 330 460


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HAYWARD GORDON LTD.

AL HYDROFOIL IMPELLER 3-BLADED BOLTED CONSTRUCTION

Section: W3Page: 7.00Issued: Nov/97Rev: Sept/00

PART NUMBER DESCRIPTION376 IMPELLER HUB379 HOOK KEY380 SET SCREW


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Drive Installation


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9

Size & Threadof Cap Screw

TaperedBushing

Ft.-Lbs.To Apply With

Torque Wrench


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10


23/32

11

BeltLength 3VX

&3V

3V

Banded

5VX&

5V

For Installation (Subtract)

5V

Banded

8VX&

8V

8V

Banded

For take-up (Add)

All

Cross Sections

BeltLength

DesignationAX&

AP

BX&

BP

CX&

CP

DX&

DP

BX& BP

Banded

CX& CP

Banded

DX& DP

Banded

For Installation (Subtract) For take-up (Add)

AllCross Sections


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12

Tensioning V-Belt Drives


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13


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BeltSection

SpeedRange

4.0 &overDia. 1.0 1.5 2.0

Small Sheave Drive Ratio

ArcContactDegree

ArcContactDegree

DdC Ac K Ac K

DdC

FactorFactor

14


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NarrowFactors

3V 4V 8V AP BP CP DP EP AX BX CX DX3VX 5VX

Narrow Cog Classical Classical Cog

15


28/32

16


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NARROW BAND CLASSICAL BAND CLASSICAL COG BAND

CROSS SECTIONTsPer

Strand(lbs.)

3V5V 8V BP CP

DP BXAll

Sizes

CXAll

Sizes

DXAll

SizesOver

CP144Over

BP144CP144

& underBP144

& under8V1700& under

5V1700& under

8V1800& over

5V1800& over

17


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18

Trouble Shooting V-Belts


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Installation Instructions

Set Screw an Skwezloc Locking

SEALMASTER Ball Bearing zone hardened, extended inner races are ground for a sliding fit over theshaft. Set screw locking bearings are easily and securely locked to the shaft by means of two self-

locking, cup point, socket head set-screws. A positive race-to-shaft lock is attained when the groundthreads of the set crews are securely tightened through the soft extended ends of the inner race. Thehardened cup point penetrates the shaft surface trapping the shaft material. The cup has flat facetedsurfaces inside which prevent the set screw from backing out during operation.

Skwezloc locking units are locked by tightening a single socket head cap screw in the collar. Uniformclamping pressure in a concentric grip is attained which does not intend to mar the shaft.

Mounting Instructions

Set Screw Locking

1. Use clean shafting free of nicks and burrs. If old shafting is used, locate SEALMASTER bearing onan unused section.

2. Make certain set screws are clear of bore.3. Slide SEALMASTER bearing into position on shaft. Never hammer the ends of the inner race, as

they may be damaged. If necessary to apply force, use a brass bar or pipe against the inner raceonly to drift bearing into place. Never strike the housing as it may damage the baring.

4. Bolt Housing to support5. Rotate shaft to make certain it turns freely

6. Tighten self-locking, cup point set screws securely onto the shaft. If a torque wrench is used, seeTable 2.

Skwezloc Locking1. The optional SKWEZLOC locking unit is assembled on the shaft as per points 1 through 5 above.

Then, slide the collar into position on the extended end of the inner race seating it squarely againstthe shoulder. Tighten the capscrew to the torque indicated in Table 3 below. Do not exceed theindicated Torque Value.

Table 2Torque for Tightening Set Screws

Minimum RecommendedTorque

Set ScrewDiameter

Hex Size Across

In-Lbs Ft-Lbs1/4 1/8 66 5.5

5/16 5/32 126 10.53/8 3/16 228 19.0

7/16 7/32 348 29.01/2 1/4 504 42.05/8 5/16 1104 92.0

Table 3Torque for Tightening Skwezloc Collars

Minimum RecommendedTorque

Cap ScrewSize

Hex Size Across

In-Lbs Ft-Lbs#8-32

UNC-3 A1/8 70 5.8

#10-24UNC-3 A

9/64 90 7.5

#1/4-20UNC-3 A

3/16 180 15

#5/16-18UNC-3 A

1/4 400 33.3


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LUBRICATION INSTRUCTIONS All SEALMASTER bearing units are pre-lubricated with grease chosen for its chemical and mechanical stability.SEALMASTER bearings are designed for lubrication with grease. Unit furnished with a grease fitting should beperiodically re-lubricated. The re-lubrication interval depends on bearing operating conditions: speed, temperatureand environment. (See Conditions in Table 1 below for typical re-lubrication schedules.)

Relubrication

1. Add grease slowly with shaft rotating until a slight bead forms at the seals.2. Re-lubrication is generally accompanied by a temporary rise in operating temperature until the bearing

chamber is stabilized with the proper amount of grease.3. It necessary to re-lubricate while bearing is stationary, refer to SEALMASTER catalog for maximum grease

capacity for the size bearing.4. For abnormal operating conditions of high temperature or abnormal environments, consult SEALMASTER

Engineers.TABLE 1

Speed Temperature Cleanliness Greasing Interval100 RPM Up to 120F Clean 6 to 12 months500 RPM Up to 150F Clean 2 to 6 months

1000 RPM Up to 210F Clean 2 weeks to 2 Months1500 RPM Over 210F Clean Weekly

Any Speed Over 150F Dirty 1 week to month Any Speed Any Temp, Dirty Daily to 2 weeks Any Speed Any Temp. Extreme Conditions Daily to 2 weeks

For normal operating conditions, re-lubricate with a grease conforming to NLGI No. 2 penetration, free from chemicalimpurities, such as dust, rust, metal particles or abrasives

impeller hub

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