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GE SIGNATURES DATE GE DRAWING NUMBER CHECKED: 373A4038 ISSUED: The Riverhawk Company reserves the right to make changes updating this document without dissemination or notice. The latest revision level may be obtained by contacting Riverhawk Company directly or at our website www.riverhawk.com. 215 Clinton Road New Hartford, NY 13413 Tel: +1 315 768 4855 Repairs – Rentals Fax: +1 315 768 4941 Revision C Field Service Email: info@riverhawk.com...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Table of Contents Page Section Description Number 1.0 Cautions and Safety Warnings 3 2.0 Scope and GE Part Number Cross‐Reference 4 3.0 Quick Check‐List 5 4.0 General Preparations 13 5.0 Hardware Set Preparations 15 6.0 Nut and Stud Assembly 17 7.0 Hydraulic Equipment Preparations 20 8.0 Assembly of Tensioner on Stud 22 ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix C1 18‐Bolt Tensioning Pattern (GT‐LC) Record Sheet 40 Appendix C2 16‐Bolt Tensioning Pattern (LC‐GEN) Record Sheet 41 1.0 Cautions and Safety Warnings NOTICE As of summer 2011, this manual is to be used in relation to the interlocking style tensioner. This new tensioner can be identified buy its ORANGE safety guard. Note: yellow guarded tensioner requires the use of different set of instructions, consult Riverhawk for assistance TO AVOID FAILURE, ENSURE SAFETY AND PROPER OPERATION THE TENSIONER AND INERLOCK ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts CAUTION DO NOT EXCEED THE MAXIMUM PRESSURE MARKED ON THE TENSIONER. Excessive pressure can damage the stud and the puller screw. WARNING: Keep hands clear of the tool while the pressure is building up. This includes the pin wrench for tightening the spanner ring (nut). Once the tool is stabilized at pressure then and only then can the nut be tightened. This reduces the potential of personal injury. Note: Before threading the puller screw into the stud, carefully check the cleanliness of both the stud's and the puller screw's conical threads. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw. Do not use “Never Seize” on the conical threads. This procedure will ...
101T4503P007 n/a n/a hardware set are not included with this part) denotes GE part numbers that include installation tooling 3.0 Quick Checklist The following checklist is intended as a summary of the steps needed to use the Riverhawk‐supplied equipment. New personnel or those experienced personnel who have not used the Riverhawk equipment recently are encouraged to read the entire manual. EQUIPMENT INSPECTION □ Check oil level in hydraulic pump. □ Check air pressure at 80 psi [5.5 bar] minimum. (For air‐driven pumps) □ Check hydraulic hose for any damage. □ Test pump. □ Inspect tensioner for any damage. NUT AND STUD PREPARATION ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts □ Measure stud lengths. (VERY IMPORTANT) □ Install studs and nuts into the flange. □ Set stick‐out dimension on the coupling side of the flange. □ Hand tighten nuts on generator side of flange. □ Verify stick‐out measurement (VERY IMPORTANT) GAS TURBINE END Tensioning (Stud Installation ) □ Check tensioner’s drawing for correct parts and part numbers. Apply a light coat of clean turbine oil or spray lubricant to the puller screw. DO NOT USE □ “NEVER SEIZE” ON THE CONICAL THREADS. □ Install spanner ring onto the nut. □ Install one puller screw release tape strip into stud. (Appendix B2) □ Thread puller screw onto the stud. Insert Allen wrench into the back side of the stud to stop the stud from rotating when □ ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts □ Tighten knurled interlock fitting by hand until it presses firmly against tensioner. (no gap) □ Slide and engage customer connector from rear of guard to lock tensioner into place. □ Tension to 50%. Consult manual for correct pressure. □ Use the pin wrench in the spanner ring to tighten nut. □ Release pressure and allow the tensioner to fully retract. □ Disconnect the hose from the tensioner. □ Loosen the knurled fitting and remove the safety guard. Unscrew the tensioner from the puller screw. Use caution to ensure that hands are not □ between the tensioner and the coupling when the tensioner becomes disengaged from the puller screw. □ Remove the foot. □...
Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts GENERATOR END Tensioning (Stud Installation ) □ Check tensioner’s drawing for correct parts and part numbers. Apply a light coat of clean turbine oil or spray lubricant to the puller screw. DO NOT USE □ “NEVER SEIZE” ON THE CONICAL THREADS. □ Install spanner ring onto the nut. □ Install one puller screw release tape strip into stud. (Appendix B2) □ Thread puller screw onto the stud. Insert Allen wrench into the back side of the stud to stop the stud from rotating when □ installing the puller screw. □ Using an Allen wrench, tighten the puller screw. Then back off puller screw 1/2 a turn. □ Retighten puller screw by hand until it is fully inserted. DO NOT BACK OFF PULLER SCREW. □ Install retention studs into adjacent studs, both sides of the puller screw. Install backside guard covering stud to be tensioned, and lightly threaded into backside of ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts □ Tension to 50%. Consult manual for correct pressure. □ Use the pin wrench in the spanner ring to tighten nut. □ Release pressure and allow the tensioner to fully retract. □ Disconnect the hose from the tensioner. □ Loosen the knurled fitting and remove the safety guard. Unscrew the tensioner from the puller screw. Use caution to ensure that hands are not □ between the tensioner and the coupling when the tensioner becomes disengaged from the puller screw. □ Remove the foot from puller screw. □ Remove the puller screw from the stud and retention studs. □ Remove the spanner ring from the nut and move to the next stud in the pattern. □...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Inspect and clean studs’ conical threads. Do not continue until ALL debris is removed □ from the threads! Refer to instruction manual IM‐220. Do not try to use the tensioner to remove a damaged stud! Apply a light coat of clean turbine oil or spray lubricant to the puller screw. DO NOT USE □ “NEVER SEIZE” ON THE CONICAL THREADS. □ Install the spanner ring onto the nut. □ Thread the puller screw onto the stud. □ Using an Allen wrench, tighten the puller screw. Then back off the puller screw 1/2 a turn. Lightly retighten the puller screw by hand until it is fully inserted. DO NOT BACK OFF THE □ PULLER SCREW. □ Slide the foot over the puller screw and orientate into position. Thread the tensioner onto the puller screw. Lightly turn the tensioner onto the puller □ screw until it stops. The gap between the foot and tensioner is about 1/16” to 3/16”. Place the safety guard over the tensioner and position the guide pin into the hole in the ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts □ Loosen the knurled fitting and remove the safety guard. □ Unscrew the tensioner from the puller screw □ Remove the foot Remove the puller screw from the stud. It may be necessary to insert and an Allen wrench □ into the backside of the stud to remove the puller screw. □ Remove the spanner ring from the nut. □ Move to the next stud in the pattern. GENERATOR END Detensioning (Stud Removal ) □ Loosen the nuts’ set screws Inspect and clean studs’ conical threads. Do not continue until ALL debris is removed □ from the threads! Refer to instruction manual IM‐220. Do not try to use the tensioner to remove a damaged stud! Apply a light coat of clean turbine oil or spray lubricant to the puller screw. DO NOT USE ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts □ Install retention studs into adjacent studs hand tight. Install backside guard covering stud to be tensioned and lightly threaded into backside of □ adjacent studs. Thread the tensioner onto the puller screw. Lightly turn the tensioner onto the puller □ screw until it stops. The gap between the foot and tensioner is about 1/16” to 3/16”. Place the safety guard over the tensioner and position locating cutouts onto retention □ studs. Tighten the knurled interlock fitting by hand until it firmly presses against the tensioner. □ (no gap). Slide and engage the custom connector from the rear of the safety guard to lock the □ tensioner into place. □ Apply the final pressure. □ Loosen the nut with the spanner ring and pin wrench. □ Release the hydraulic pressure and allow the tensioner to fully retract. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts □ Move to the next stud in the pattern. 4.0 General Preparations Read and understand all instructions before installing and tensioning studs This equipment produces very high hydraulic pressures and very high forces. Operators must exercise caution, wear safety glasses and hard hats when using this equipment. High‐pressure fluid from the Hydraulic Pressure Kit system pressurizes the tensioner which generates a stretching force that actually stretches the stud. As the stud is stretched the nut lifts off the flange. The nut is then reseated into position on the flange by turning spanner ring with the pin wrench. When the nut is tight against the flange, the pressure in the tensioner is released leaving the stud loaded to its predetermined value. 4.1 Machine Preparation The flange to be tensioned must be fully closed prior to positioning of studs in the flanges. Turning the shafts of the turbine and the generator are not required, but may be useful. Also, it will be advantageous to remove as many obstructions as possible from the flange area, such as speed probes, shipping plates, and conduit. 4.2 Hardware – Balance Hardware is supplied as weight balanced sets. Studs and Nuts are interchangeable within a set. Do not mix stud and nuts from multiple sets. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts When in use, the tensioner shall be protected from sand and grit. 4.4 Hand Tools Several hand wrenches and micrometers may be required to perform installation and measurement of the studs: 5/8” wrench A set of Allen Wrenches 3’ – 4’ Breaker Bar 8” to 9” micrometer or caliper 9” to 10” micrometer or caliper 4.5 Special Tools Hydraulic Tensioner Kit: HT‐5494 Hydraulic Tensioner (Both Syngas Generator and Turbine Flanges) (reference GE 269B8729) HT‐5194 Hydraulic Tensioner (Syngas Generator Flange) (reference GE 269B8702) HT‐5222 Hydraulic Tensioner (Gas Turbine Flange) (reference GE 269B8697) Hydraulic Pump Kit: AP‐0532 Air‐Operated Hydraulic Pump ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 5.0 Preparation of Hardware 5.1 Nut Preparation Spanner Set Screw Ring Holes 1 of 2 Sample Picture of a Riverhawk Locknut If there is any visible damage on a nut, do not use the nut and contact the Riverhawk Company for a replacement nut. Please be prepared to supply the turbine number, weight certification, and digital photographs for evaluation. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 5.2.1 Stud Cleaning ‐ New Installations For new installations, the studs should come sealed from the factory and will need no cleaning. 5.2.2 Stud Cleaning ‐ Old Installations Previously installed studs will require cleaning. Clean conical threads should have a bright and shiny appearance. Notice: Failure to properly clean the studs could result in improper mating of threads. Personal injury and equipment damage can occur if the puller screw is not securely engaged with the tapered thread of the stud. If cleaning is required, follow these steps: 1. Blow out the threads with compressed air to remove loose debris and dry conical threads. Reference instruction manual IM‐220 for more detailed instructions. Do not apply a solvent or other cleaning solution to the threads as this may chemically attack the stud. 2. Use Stud Cleaning Kit, GT‐4253 or a similar 1" diameter Brass power brush. Picture of Brass Power Brush 3. Insert the brush into an electric drill and set drill to run in a counterclockwise direction at ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 8. Inspect threads for any damage that may have been caused by previous installation. Do not apply thread lubricants to the threads. Finish the cleaning process by rinsing in a volatile solvent such as acetone and allow to dry. 5.3 Stud Length Measurement Measure and record the initial lengths of the studs on the supplied stretch datasheet in Appendix C of this manual. The following recommendations will improve your results. Plan to start and finish any flange in the same day. Studs and flange must be at the same temperature. Keep the measuring instruments out of the sunlight. Number each stud with a marker for later stretch measurement tracking. Mark the location of measurement on stud end with a permanent marker. The same person should make all measurements. Measure each stud to nearest 0.001 inch (.01 mm). Record each measurement on the stretch record sheets in this manual's appendix. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Figure 1 – Cutaway View of Turbine Flange and Coupling Flange Bolted Joint The nuts are different on the Generator end (2.75”); the shorter nut goes on the back side or the side closest to the Generator. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 373A4038 215 Clinton Road New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 18 of 41...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Figure 2 – Cutaway View of Generator Flange and Coupling Flange Bolted Joint Adjust the front side stud/nut assembly so that the stud sticks out from the face of the nut the amount shown on the hardware set drawing. If you don’t have a hardware set drawing, it can be found in the GE drawing system or contact Riverhawk Company. (See section 2) SETTING THE STICK‐OUT LENGTH IS CRITICAL FOR THE HYDRAULIC TENSIONER TO WORK CORRECTLY. THE STICK‐OUT LENGTH IS ALWAYS SET FROM THE COUPLING SIDE OF THE FLANGE. The stick‐out length can be checked three different ways. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 373A4038 215 Clinton Road New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 19 of 41...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Stick‐Out Gage Drop Gage Digital Calipers Sample Pictures of a Stick‐Out Measurement Hand tighten the assembly to a snug fit. See Figures 1 & 2 for a view of the assembly of studs and nuts in the flange prior to tensioning. 7.0 Hydraulic Equipment Preparations 7.1 Hydraulic Equipment Inspection CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 7.1.1 Hydraulic Tensioner Inspection CAUTION Riverhawk recommends that the tensioner be returned to Riverhawk for periodic inspections. Replacement of obsolete tensioners is recommended. Functional upgrades are also recommended. The Riverhawk Service Returns Coordinator should be notified 3‐6 months prior to a planned outage to schedule an inspection service. This tensioner does not require the air to be removed (or bled) from its hydraulics. This has been done at the factory. WARNING To avoid failure, ensure safety, and proper operation, the tensioner assembly must be installed on a stud in the flange before pressurizing the tensioner. Do not use the tensioner at any pressure unless the tool is installed on a stud in a flange. Clean puller screw and check for any debris and dents. Inspect the tensioner guard for any signs of damage including cracked welds. Any guards modified in the field should be replaced. Bent guards should be replaced. If the guard has rubber parts, they should be in good condition. Any missing rubber parts needed to be replaced. Inspect the outside of the tensioner for discoloration patterns that may indicate submersion and internal damage. Perform an inventory of the loose equipment supplied with the tensioner. An inventory list is provided on the tensioner’s technical drawing (Riverhawk HT‐xxxx listed in section 2.0 and 4.5). Replacement parts are available from Riverhawk. 7.1.1.1 Hydraulic Tensioner’s Burst Disc Replacement ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Warning A damaged burst disc must be replaced with a burst disc of the same design and pressure rating. Do not substitute a damaged burst disc with a different disc type, a different pressure rating, or a foreign object. 7.1.2 Hydraulic Pump Kit Inspection Refer to the Hydraulic Pump Kit Instruction Manual, IM‐293 (GE VENDOC 373A4058). The latest revision may be obtained by contacting Riverhawk Company or thru www.riverhawk.com. 7.1.3 Hydraulic Hose Inspection Check the hydraulic hose for any damage including bent hose ends and split outer lining. If any damaged is found, replace the hose immediately by contacting the Riverhawk Company. 7.2 Hydraulic Fittings Information on the correct assembly of the hydraulic pump’s and hydraulic hose’s hydraulic fittings can be found in Appendix B1. 7.3 Bleeding Hydraulic System Bleeding of the hydraulic system is not necessary with this tensioner design. 8.0 Assembly of Tensioner on Stud This tensioner kit is most readily identified by the safety ORANGE cages (guard assembly) they employ. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts GAS TURBINE END 8.1.1 Assembly of Tensioner Kit with ORANGE Safety Guard Refer to Tensioner drawing and Figure 5 for tensioner to flange mounting. Assembly sequence is as follows: 1. Carefully check the cleanliness of both the stud's and the puller screw's conical threads. 2. Ensure stud length measurement is documented. 3. Verify stick out length of stud to nut. 4. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw. Do not use “Never Seize” on the conical threads. 5. Place the spanner ring onto the nut 6. Install one puller screw release tape strip into end of stud. (Appendix B2) 7. Insert the puller screw into the tapered thread of the stud and hand tighten. Be sure not to cross‐thread the assembly 8. Using an Allen wrench tighten puller screw, then back off puller screw 1/2 a turn. 9. Retighten puller screw by hand until it is fully inserted. DO NOT BACK OFF PULLER SCREW. 10. Place the foot over puller screw, orientate into position. 11. Thread tensioner onto puller screw. Note: Internal stop in tensioner will result in gap with ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 8.1.2 Assembly of Tensioner Kit GENERATOR END Refer to Tensioner drawing and Figure 6 for tensioner to flange mounting. Assembly sequence is as follows: 1. Carefully check the cleanliness of both the stud's and the puller screw's conical threads. 2. Ensure stud length measurement is documented. 3. Verify stick out length of stud to nut. 4. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw. Do not use “Never Seize” on the conical threads. 5. Place the spanner ring onto the nut 6. Install one puller screw release tape strip into end of stud. (Appendix B2) 7. Insert the puller screw into the tapered thread of the stud and hand tighten. Be sure not to cross‐thread the assembly 8. Using an Allen wrench tighten puller screw, then back off puller screw 1/2 a turn. 9. Retighten puller screw by hand until it is fully inserted. DO NOT BACK OFF PULLER SCREW. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts locks onto the tensioner. Release fingers from tabs and then remove thumb. Ensure connection is firmly engaged or else the tensioner will not be connected to pump. See figure 4. Pull tabs with fingers Pull tabs Push center with fingers with thumb Figure 4 – Activation of the custom connector Figure 5 – Cutaway View of Tensioner Installed on Turbine Flange CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 373A4038 215 Clinton Road New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Figure 6 – Cutaway View of Tensioner Installed on Generator Flange CAUTION Personal injury and equipment damage can occur if the puller screw is not securely engaged with the conical threads of the stud. Proper engagement is achieved when the puller screw is tight in the stud and is not cross‐threaded into the conical thread. 8.2 Removing Air from the Hydraulic System (Bleeding the air) Removing the air from the tensioner’s and pump’s hydraulics is not required. This has been done at the Riverhawk factory. 9.0 Stud Pulling and Tensioning The studs will be tensioned in two steps, at 50% pressure and at final pressure. Follow the tensioning sequence for each flange joint as defined on the data sheets found at the end of this manual. Note: Before threading the puller screw into the stud, carefully check the cleanliness of both the stud's and the puller screw's conical threads. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw. Do not use “Never Seize” on the conical threads. This procedure will ease assembly and assure positive mating of the threads before tightening. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts WARNING The safety guard MUST be in place and hands kept out of designated areas at all times when the tensioner is pressurized otherwise personal injury can occur. 9.1 Tensioning at 50% pressure After the tensioner is properly installed apply hydraulic pressure to the tool. Bring the pressure to the 50% level in accordance with the following table. Flange Position Stud Size 50% Pressure 50% Stretch 2‐1/4" 9000 psi Do not measure Turbine to Coupling [58 mm] [620 bar] Do not use 2‐3/4" 10000 psi Do not measure Coupling to Generator [71 mm] [690 bar] Do not use 9.1.1 Tightening of Nuts ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 4. Remove the foot. 5. Unscrew the puller screw using an Allen wrench. 6. Tapping the Allen wrench with a hammer or the use of a 3‐4’ breaker bar may be necessary to loosen the puller screw. 7. Remove the spanner ring from nut. 8. Move the tool to the next stud/nut assembly to be tensioned, following the sequence/pattern as defined on the supplied data sheets. GENERATOR END 9.2.2 Removing the Tensioner from an Installed Stud The tensioner removal is to be accomplished by the follows steps: 1. Release the tensioner tool pressure by opening the valve on the pump. Leave valve open. (This is automatic on the air‐operated hydraulic pump) Allow approximately 20 seconds for tensioner to fully retract, then remove hose from tensioner. 2. Unscrew knurled fitting at the end of the guard and remove guard. 3. Unscrew tensioner from puller screw. Use caution to ensure that hands are not between tensioner and coupling when tensioner becomes disengaged from puller screw. 4. Remove the foot from puller screw. 5. Unscrew the puller screw and retention studs using an Allen wrench. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts CAUTION Before threading the puller screw into the stud, carefully check the cleanliness of both the stud's and the puller screw's conical threads. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw. This procedure will ease assembly and assure positive mating of the threads before tightening. Do not use “Never Seize” on the conical threads. CAUTION Do not exceed the maximum pressure marked on the tensioner. Excessive pressure can damage the stud and puller screw. CAUTION Do not tighten the nut while the tool is coming up to pressure; wait until pressure is achieved before attempting to tighten the nut with the spanner ring. If the tool is not properly installed, the tool could jump off the stud while coming up to pressure. Flange Position Stud Size Final Pressure Final Stretch 2‐1/4" 17000 psi 0.017" ‐ 0.020" Turbine to Coupling [58 mm] [1170 bar] [0.43 mm ‐ 0.51 mm] 2‐3/4" 18000 psi 0.012" ‐ 0.014" ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts (2) Locking (2) Spanner Set Screws Ring Holes Sample Picture of a Riverhawk Locknut Mechanical Locknuts have two set screws located in the top face, see picture. Before threading the nut onto the stud check to be certain that the set screws are free to turn. Once the nut is seated, torque the set screws to the values specified in the following table. When seated and torqued to the values specified the load created by the set screw displaces the thread of the nut in the area of the web creating the desired locking action. Stud Size Set Screw Size Torque 2‐1/4" 70 in∙lbs ‐ 80 in∙lbs 1/4"‐28 UN [58 mm] [7.9 N∙m ‐ 9.0 N∙m] 2‐3/4" 200 in∙lbs ‐ 250 in∙lbs 3/8"‐24 UN [71 mm] [22.6 N∙m ‐ 28.2 N∙m] 11.0 Stud/Nut removal ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 11.1 Removal of Assemblies with Mechanical Locknuts For those assemblies which have been locked using mechanical locknuts, removal is accomplished as follows: Using a wire brush, GT‐4253, and shop air clean the conical thread of the stud to remove any debris/deposits which may have accumulated during service as described in section 5.2. With an Allen‐wrench loosen the two locking set screws but do not remove from the nut. Sample Picture of the loosening of a nut's set screws Install the appropriate tensioner onto the stud as described in Section 8.0. Apply the appropriate hydraulic pressure per the Table of Section 9.3. Using the spanner ring and spanner/pin wrenches, loosen the nut 3/4 turn. Then release the pressure and remove the tensioner. 12.0 Storage Instructions Follow these directions to properly store your hydraulic tensioner and hydraulic pump kit for long term storage and shipment. If any damage is observed, contact the Riverhawk Company to schedule a maintenance inspection. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts 12.1 Hydraulic Pump Kit Storage Refer to the Hydraulic Pump Kit Instruction Manual, IM‐293 (GE VENDOC 373A4058). The latest revision may be obtained by contacting Riverhawk Company or thru www.riverhawk.com. 12.2 Hydraulic Tensioner Storage Check the tensioner for any damage 1. Clean puller screw and check for any debris and dents. 2. Knurled interlock fitting should be clean and free to rotate. 3. Inspect tensioner guard for any signs of damage. Bent guards must be replaced. 4. If any damage is observed, contact the Riverhawk Company to schedule a maintenance inspection. If any damage is observed, contact the Riverhawk Company to schedule a maintenance inspection. Place protective plastic cap into the hydraulic port. Coat the hydraulic tensioner and foot with a light coat of oil and place the tensioner into the original shipping container. 12.3 Store shipping container Secure the hydraulic pump and hydraulic tensioner into the original shipping containers using the supplied wood braces. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Q: A tensioner has pulled itself out of the stud's conical threads. Can I continue using a tensioner on this stud? A: No. Both the tensioner and the stud may have been damaged and must be removed from the work area. If the stud is tensioned, a Nut Buster repair kit, from Riverhawk, must be used to remove the damaged stud by drilling out the nut. Leaving a damaged stud in place will lead to a safety hazard on future outages. Riverhawk can supply a replacement stud and nut based on the initial weight certification supplied with the hardware set (see section 4.2). The damaged tensioner should also be returned to Riverhawk for inspection and repair. If a stud must be left in place, paint the damaged stud with a generous amount of indelible, bright‐colored paint. Notify the appropriate GE Safety and Service personnel. Note the location of the damaged stud in the services notes for the machine. Q: The hydraulic tensioner has been taken up to its final pressure. The final stretch length is short of the final stretch target. What is the next step? Do not increase the hydraulic pressure. Check if the hydraulic pump is set to the right A: pressure. Install the tensioner and re‐pressurize the tensioner to the final pressure then ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Q: How do I clean the conical threads on a stud? A: The conical threads are best cleaned using a spiral wound brass brush in a drill as described in section 5.2. For detailed description refer to Instruction Manual IM‐220. Q: During the initial steps of removing a tensioned stud, the stick‐out length is found to be wrong. A: Do not proceed. Refer to Instruction Manual IM‐226 or contact Riverhawk for assistance. With the wrong stick‐out length, the hydraulic tensioner has a limited stroke and may not work properly and can be damaged. Q: The hydraulic pump appears to be leaking. A: Check the hose connection to the hydraulic pump. If the 1/4" high pressure fitting is not assembled correctly as shown in section 7.2, it may look like the pump is leaking. If the problem continues, it may be necessary to open the pump kit. Contact Riverhawk for guidance. Q: ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Revision Effective Date Description Letter A Apr 23, 2012 Updated to include HT‐5494 allowing tooling for both ends of Syngas load coupling, Revised Sections 3.0, 4.4, 6.0, 8.1, 9.2, 9.3 ‐ Feb 28, 2012 Released Appendix A1 EC Declaration of Conformity Manufacturer: Riverhawk Company Address: 215 Clinton Road New Hartford, NY 13413, USA The hydraulic pump and bolt tensioning tool described in this manual are used for installing and applying tension to large bolts that are specifically designed by Riverhawk Company to be tensioned hydraulically. ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix A2 UKCA Declaration of Conformity Manufacturer: Riverhawk Company Address: 215 Clinton Road New Hartford, NY 13413, USA The hydraulic pump and bolt tensioning tool described in this manual are used for installing and applying tension to large bolts that are specifically designed by Riverhawk Company to be tensioned hydraulically. All applicable sections of Supply of Machinery (Safety) 2008 have been applied and fulfilled in the design and manufacture of the hydraulic pump and bolt tensioning tool described in this manual. Reference also ISO 12100:2010, ISO 4413:2010, and ISO 4414:2010. Furthermore, this equipment has been manufactured under the Riverhawk quality system per EN ISO 9001:2015 Consult the Declaration of Conformance included with the shipment of this equipment that identifies the authorized Riverhawk representative, applicable serial numbers, and appropriate signature. CUSTOMER'S INFORMATION BOX ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix B1 ‐ Hydraulic Fittings Riverhawk tensioners use a 1/4” High Pressure port to connect its hydraulic hoses. The hose connector is made from a three piece assembly: a gland nut, a collar, and a 1/4” tube or 1/4” hose end. (See Illustration 1) To assembly the fitting, slide the gland nut over the 1/4” tube or 1/4” hose end. Turn the collar counter‐ clockwise (left hand thread) on to the tube or hose end as shown in Illustration 1. Illustration 1 The collar should be placed .125” (3.2 mm) from the tip of the cone. (See Illustration 2) It may be necessary to adjust this collar with a set of vise‐grip pliers. Be careful to not strip the threads off the tube or hose end. Illustration 2 Slide the gland nut down over the collar. (See Illustration 3) Insert the 1/4” tube or 1/4” hose end ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix B2 – Puller Screw Release Tape Installation Reference: GT‐6516 (GE 373A4080) Caution Apply a light coat of clean turbine oil or a spray lubricant to the puller screw. This procedure will ease assembly and assure positive mating of the threads before tightening. Do not use “Never Seize” on the conical threads. To use puller screw release tape ‐During tensioner assembly 1. Following steps in the tensioner installation manual, before inserting the puller screw into the stud. 2. Insert a single puller screw release tape onto the internal thread of the stud leaving approximately 1/8” [3mm] sticking out of the end of the stud. (see picture below) 3. Insert puller screw into stud, per instruction manual and continue assembly of the tensioner. ‐After tensioning and removal of tensioner from stud 1. Follow appropriate tensioner installation manual for disassembly of the tensioner. 2. Once tensioner is removed, clean studs internal thread and puller screw external thread to remove all debris left behind by puller screw release tape using brass power brush (GT‐ 4253) Release Tape ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix B3 ‐ Hydraulic Tensioner’s Burst Disc Replacement The hydraulic tensioner’s burst disc is a key element in the overall safe use of the hydraulic tensioner. Each tensioner is shipped from our factory with one burst disc already installed in the tensioner and with another spare disc for field replacement. Extra burst discs are available from Riverhawk for replacement purposes. To replace a damaged burst disc: 1. Remove the hydraulic port’s dispersion nut, compression ring, and damaged burst disc. 2. Discard the damaged burst disc. 3. Clean the dispersion nut, compression ring, new burst disc, and the hydraulic port with a solvent to ensure a dirt‐free installation. 4. Reassemble new burst disc, compression ring, and dispersion nut into the same hydraulic port. Warning A damaged burst disc must be replaced with a with a burst disc of the same design and pressure rating. Do not substitute a damaged burst disc with a different disc type, a different pressure rating, or a foreign object. Burst Disc CUSTOMER'S INFORMATION BOX ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix C1 STRETCH RECORD SHEET FOR THE TURBINE END TURBINE NUMBER: DATE: TECHNICIAN: SUPERVISOR: HOLE NUMBER STARTING LENGTH FINAL LENGTH FINAL STRETCH 1 10 2 ...
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Instruction Manual IM-255 For Gas Turbine Tensioned Studs & Nuts Appendix C2 STRETCH RECORD SHEET FOR THE GENERATOR END TURBINE NUMBER: DATE: TECHNICIAN: SUPERVISOR: HOLE NUMBER STARTING LENGTH FINAL LENGTH FINAL STRETCH 1 9 2 10 ...
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