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____ OF ____ GE SIGNATURES DATE GE DRAWING NUMBER CHECKED: 373A4000 ISSUED: The Riverhawk Company reserves the right to update this document without dissemination or notice. The latest revision may be obtained by contacting Riverhawk Company or thru www.riverhawk.com. 215 Clinton Road New Hartford, NY 13413 Tel: +1 315 768 4855 Repairs – Rentals Fax: +1 315 768 4941 Revision W Field Service Email: info@riverhawk.com Page 1 of 38...
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Storage Instructions 30 13.0 Frequently Asked Questions 31 14.0 Revision History 33 Appendix A1 EC Declaration of Conformity 35 Appendix A2 UKCA Declaration of Conformity 36 Appendix B1 18‐Bolt Tensioning Pattern (GT‐LC) Record Sheet 37 Appendix B2 16‐Bolt Tensioning Pattern (LC‐GEN) Record Sheet 38 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 2 of 38 ...
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Instruction Manual IM‐125 1.0 Cautions and Safety Warnings WARNING Improper tool use and the failure to follow the correct procedures are the primary root causes of tool failures and personal injuries. A lack of training or experience can lead to incorrect hardware installation or incorrect tool use. Only trained operators with careful, deliberate actions should use hydraulic tensioners. Contact Riverhawk Company with any training needs. WARNING Risk of high pressure hydraulic fluid injection. Riverhawk tools operate under high pressure. Thoroughly inspect all hoses and connections for damage prior to using this equipment. CAUTION Personal injury and equipment damage can occur if the proper health and safety codes and procedures are not followed. Contact the site’s health and safety office to determine all applicable safety rules and regulations. WARNING The proper personal protective equipment must be worn at all times. Riverhawk recommends at a minimum, safety glasses, long sleeve shirt, hard hat, heavy work gloves, and steel toe shoes. CAUTION It is especially important to check the condition of the conical thread used to tension the stud. Thread damage from previous abuse can lead to failure of the stud or tensioning equipment CAUTION Riverhawk recommends that the tensioner should 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. 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. WARNING To avoid failure, ensure safety, and proper operation, the tensioner assembly must be installed ...
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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. CAUTION Do not exceed the maximum pressure marked on the tensioner. Excessive pressure can damage the stud and puller screw. WARNING FIRE HAZARD: DO NOT heat when puller assembly is in place. Personal injury or equipment damage may occur. Use of an Oxy‐Acetylene torch is not recommended 2.0 Scope This document describes the procedure to be used to install the stud and nut sets supplied by the Riverhawk Company in the flanges at the Turbine/Coupling, Coupling/Generator, and Steam Turbine/Generator connections. The various frame configurations covered in this manual are listed in Sections 2.1 through 2.6 with differences as related to connective hardware defined. Listed also are the pertinent CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 4 of 38...
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Instruction Manual IM‐125 hardware drawings (HF‐xxxx). These drawings as well as tooling drawings (HT‐xxxx) form part of this manual. 2.1 Frame 7FA Gas Turbine to 7FH2 Generator GE PART NUMBER RIVERHAWK P/N GE VENDOC P/N GE 358A7202P001 HF‐0771 GE 359B2514 GE 358A7202P002 HF‐0771 GE 359B2514 GE 358A7202P012 HF‐0771 GE 359B2514 The hydraulic tool used for installation and removal is Riverhawk HT‐0342. These hardware drawings depict the complete stud and nut package for the Gas Turbine to Load Coupling (2‐1/4” size, Qty 18) as well as the Load Coupling to Generator (2‐3/4” size, Qty 16). 2.2 Frame 7FA Gas Turbine to Load Coupling GE PART NUMBER RIVERHAWK P/N GE VENDOC P/N GE 358A7202P031 HF‐2447 GE 359B2539 GE 358A7202P032 HF‐2447 GE 359B2539 GE 361A5218P001 HF‐2447 GE 359B2539 ...
Instruction Manual IM‐125 2.4 Frame 7FB Gas Turbine to Load Coupling GE PART NUMBER RIVERHAWK P/N GE VENDOC P/N GE 377A9477P006 HF‐2447 GE 359B239 The hydraulic tool used for installation and removal is Riverhawk HT‐0342. These hardware drawings depict the complete stud and nut package for the Gas Turbine to Load. 2.5 Load Coupling or Steam Turbine to 7FH2 Generator GE PART NUMBER RIVERHAWK P/N GE VENDOC P/N GE 358A7202P018 HF‐0803 GE 359B2520 GE 382A6121P003 HF‐0803 GE 359B2520 GE 382A6132P004 HF‐0803 GE 359B2520 GE 377A9477P003 HF‐0803 GE 359B2520 GE 377A9477P005 HF‐0803 GE 359B2520 The hydraulic tool used for installation and removal is Riverhawk HT‐0342. These hardware drawings depict the complete stud and nut package for the Load Coupling or Steam Turbine to Generator (2‐3/4” size, Qty 16). ...
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□ 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 turbine / generator side of flange. □ Verify stick‐out measurement (VERY IMPORTANT) TENSIONING (Bolt Installation) □ Check tensioner 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. □ Slide spanner ring over the puller screw. □ Install the tensioner on the stud in flange and slide spanner ring onto nut. □ Insert 1/2” hex Allen wrench into the back side of the stud. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 7 of 38 ...
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□ Measure final stud length and record on stretch datasheets. Calculate stretch. □ Torque the nuts' set screws. DETENSIONING (Stud Removal) □ Loosen nuts' set screws Inspect and clean studs' conical threads. Do not continue until ALL debris is removed □ from the threads! See 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. □ Slide spanner ring over the puller screw. □ Install the tensioner on the stud. □ Install spanner ring into nut. □ Tighten the puller screw. Then back off puller screw 1/2 a turn. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 8 of 38 ...
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Instruction Manual IM‐125 □ Retighten the puller screw and leave tight. DO NOT BACK OFF PULLER SCREW. Bleed the tensioner. Do NOT bleed tensioner off of a stud! Damage to the tool will □ result! □ Apply final pressure. □ Loosen nut with the spanner ring and pin wrench. □ Move to next stud in pattern 4.0 General Preparations Read and understand all instructions before installing and tensioning studs. Operators should be trained or have previous experience using Riverhawk tensioning equipment. Training will minimize the chance of improper use of the equipment. The hydraulic tooling including the hydraulic hoses should be inspected prior to use. Inspection guidelines are listed in the following sub‐sections. This equipment produces very high hydraulic pressures and very high forces. Operators must exercise caution and wear the appropriate personal protective equipment when handling and operating the hydraulic tooling. High‐pressure oil from the hydraulic pump pressurizes the tensioner which generates a very large force that actually stretches the stud. As the stud is stretched the nut lifts off the flange. The nut is then turned by hand using the supplied spanner ring. Once the nut is tight against the flange, the pressure in the tensioner is released. The hardware is now clamping the flange together. 4.1 Machine Preparation The flange to be tensioned must be fully closed prior to positioning of studs in the flanges. Turning the turbine and generator shafts is not required, but may be useful. Also, it will be ...
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A set of Allen Wrenches 9” to 10” micrometer 1” wrench 3’ – 4’ Breaker Bar 10” to 11” micrometer 4.5 Special Tools Hydraulic Tensioner Kit: HT‐0342 Hydraulic Tensioner (reference GE VENDOC 359B2500) Obsolete Hydraulic Tensioner Kits: HT‐0835 Hydraulic Tensioner (OBSOLETE, replaced by HT‐0342) Hydraulic Pump Kit: AP‐0532 Air‐Operated Hydraulic Pump (recommended) (reference GE VENDOC 359B2502) CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 10 of 38 ...
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Instruction Manual IM‐125 MP‐0130 Manual Hand‐Operated Hydraulic Pump (reference GE VENDOC 359B2506) CAUTION Riverhawk recommends that the tensioners 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. 5.0 Hardware Set Preparations 5.1 Nut Preparation Spanner Set Screw Ring Holes 1 of 2 ...
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Instruction Manual IM‐125 5.1.2 Nut Cleaning ‐ Old Installations Previously installed nuts require cleaning as follows: Wire brush using a petroleum‐based solvent to remove any foreign material on the external surfaces and threads. 5.1.3 Nut Cleaning ‐ Very Old Installations If previous installations employed a thread‐locking compound, which will be visible as a grayish‐ green residue, remove as much of this compound as possible. Finish the cleaning process by rinsing in a volatile solvent such as acetone and allow to dry. Riverhawk Company strongly recommends replacing this style of nut with the current nut with a re‐useable mechanical locking feature. 5.2 Stud Preparation Check the stud for any visible damage. If there is any visible damage, do not use the stud and contact the Riverhawk Company for a replacement stud. Please be prepared to supply the turbine number, weight certification, and digital photographs for evaluation. CAUTION It is especially important to check the condition of the conical thread used to tension the stud. Thread damage from previous abuse can lead to failure of the stud or tensioning equipment. The conical threads of each stud must be clean of grit and dirt before installation or removal. This ensures the proper seating of the puller screw. 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 may require cleaning. Clean conical threads should have a bright and shiny appearance. If cleaning is required, follow these steps: ...
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8. Inspect threads for any damage that may have been caused by previous installation. 9. Do not apply thread lubricants such as “Never Seize” to the stud’s threads. 10. Finish the cleaning process by rinsing in a volatile solvent such as acetone and allow to dry. 5.2.3 Stud Cleaning ‐ Very Old Installations If previous installation employed a thread locking compound, which will be visible as a grayish‐ green residue, remove as much of this compound as possible from the stud’s 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. The following suggestions will improve your results. Plan to start and finish any flange in the same day. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 13 of 38 ...
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Measure each stud to nearest 0.001 inch (.01 mm). Record each measurement on the supplied record sheets. Do not allow the measuring instruments to sit in the sun. The same person should make all measurements. 6.0 Stud and Nut Assembly Refer to Hardware Set Part Number drawing listed in Section 2.0 of this manual. Assemble the nut to the conical thread end (Tensioning End) of the stud. Slide the assembly into the flange from the coupling side as shown in Figures 1 & 2 (on the next page) then install the other nut on the backside. The nuts are the same on the Turbine end (2.25”). 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. Figure 1 – Cutaway View of Turbine Flange and Coupling Flange Bolted Joint CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 14 of 38 ...
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Instruction Manual IM‐125 Figure 2 – Cutaway View of Generator Flange and Coupling Flange Bolted Joint Adjust the 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 Vendocs 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. Stick‐Out Gage Drop Gage CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 15 of 38...
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Hand tighten the assembly to a snug fit. See Photos 1 & 2 for a view of the assembly of studs and nuts in the flange prior to tensioning. Coupling Side Turbine / Generator Side Photo 1 Photo 2 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 16 of 38 ...
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Instruction Manual IM‐125 7.0 Hydraulic Tensioner Equipment Assembly 7.1 Hydraulic Equipment Inspection 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. Do not bleed the air from the hydraulic lines and tensioner at this time. See section 8 for bleeding instructions on when to bleed the air from the hydraulic lines. WARNING To avoid failure, ensure safety, and proper operation, the tensioner assembly must be installed on a stud in the flange before bleeding and pressurizing the tensioner. Do not use the tensioner at any pressure unless the tool is installed on a stud in a flange. Check puller screw usage life with Riverhawk service bulletin SB‐08001. Clean puller screw and check for any debris and dents. Puller screw should be free to rotate and move back and forth. Seam between cylinders closed tightly. 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. Also, be sure the rubber pad is in place on the end of the guard, if missing, replace. 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 (for example Riverhawk HT‐xxxx). Replacement parts are available from Riverhawk. ...
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Instruction Manual IM‐125 NOTE: Prior to Serial Number S/N 721 the HT‐0342 was supplied with two adapter feet. The feet were marked “TURBINE” and “GENERATOR”. Mount the appropriate foot before attempting use of the tensioner. 7.1.1.1 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. 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. CUSTOMER'S INFORMATION BOX ...
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Instruction Manual IM‐125 7.2 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 into tensioner or hydraulic pump. While firmly holding the tube or hose end to stop it from rotating, turn the gland nut clockwise (right hand thread) and torque the gland nut to 25 FT‐LBS (34 N‐m). Tips: Make sure all parts are clean and free from ...
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If possible, use a ‘Come‐along’ or chain fall from the ceiling of the coupling room and attach it to the tensioner using a short strap wrapped through the handles and around the top of the tensioner. This will allow the operators to easily move the tensioner around the coupling shaft by supporting the weight of the tool. 8.2 Kit Assembly Assemble the hydraulic pump with its hose to the tensioner and bleed out the air per following instructions in section 8.3. 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. Refer to Tensioner Assembly drawing and photo for views of the tensioner to flange mounting. All tensioning will be performed on the coupling side of the flange connections. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 20 of 38 ...
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With Burst Disc Safety Guard Rubber Pad (DO NOT REMOVE) Puller Screw Sample photograph of HT‐0342 NOTE: Prior to Serial Number S/N 721 the HT‐0342 was supplied with two adapter feet. The feet were marked “TURBINE” and “GENERATOR”. Mount the appropriate foot before attempting use of the tensioner. Assembly sequence is as follows: 1. Place the spanner ring (different for each end turbine or generator) over the puller screw on the tensioner. 2. Place and hold the tensioner assembly over the end of the stud to be tightened. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 21 of 38 ...
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5. Place the spanner ring on the cylindrical nut located on the stud. 6. At this point the Tensioner Assembly MUST BE FREE TO ROTATE, the puller screw must be tight in the stud. DO NOT BACK OFF PULLER SCREW. If the tensioner is not free to rotate when the puller screw is tight then, either (1) the stud is not properly positioned in the flange and recheck the stick‐out length and reposition the nuts, or (2) The tensioner is damaged and must be returned for repair. CAUTION Personal injury and equipment damage can occur if the puller screw is not securely engaged with the tapered thread of the stud. Proper engagement is achieved when the puller screw is tight in the stud and the Tensioner Assembly is free to rotate. 8.3 Bleeding Hydraulic System WARNING To avoid failure, ensure safety, and proper operation, the tensioner assembly must be installed on a stud in the flange before bleeding and pressurizing the tensioner. Do not use the tensioner at any pressure unless the tool is installed on a stud in a flange. The tensioner has four ports, one for pressurizing, two for bleeding the system, and a fourth pressure relief port. To facilitate bleeding, start by first mounting the tensioner at the 9 o’clock CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 22 of 38 ...
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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. WARNING The safety cage must be in place at all times. Keep hands out of designated areas at all times when the tensioner is pressurized otherwise personal injury can occur. 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 23 of 38 ...
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3. Move the tool to the next bolt hole following the tensioning pattern from the stretched record sheets at the end of this manual. 9.3 Tensioning at Final Pressure Repeat the pulling and tightening procedure stated above at full pressure. After all of the studs have been tensioned, measure the final stud length. The final pressure and required stretch values are listed in the following table. WARNING The safety cage must be in place at all times. Keep hands out of designated areas at all times when the tensioner is pressurized otherwise personal injury can occur. 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 24 of 38 ...
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[0.31 mm ‐ 0.36 mm] Excessive stretch variations or low stretch values can be corrected by uninstalling all or selected studs to the pressure values stated in the above table. Have final stretch values approved by the supervisor responsible for the installation. 9.3.1 Tightening of 2‐1/4” and 2‐3/4” nuts Turn the cylindrical nut using the spanner ring and pin wrench until it bottoms on the flange. 10.0 Thread Locking Once pulling and tensioning is completed all stud nuts must be locked in position. Two methods of thread locking may be encountered in the field. Early version hardware entails a liquid thread locking compound while the current configuration employs a mechanical locking device. Each method is described in detail in Sections 10.1 and 10.2. 10.1 Thread Locking Using a Liquid Locking Compound These nuts have no visible locking feature. Contact Riverhawk Company if you have any of these older style nuts. Riverhawk Company strongly recommends replacing this style of nut with the current nut with a re‐useable mechanical locking feature. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W ...
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Spanner Set Screw Ring Holes 1 of 2 Picture 3 Riverhawk Locknut Mechanical lock nuts have two set screws located in the top face. Before threading the nut onto the stud check to be certain 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] [3.4 N∙m–4.1 N∙m] 2‐3/4” 200 in∙lbs – 250 in∙lbs ...
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Turbine to Coupling [58 mm] [1170 bar] 2‐3/4" 18000 psi Coupling to Generator [71 mm] [1240 bar] 4. If the nut cannot be loosened, release the pressure and repeat the procedure. 5. Ordinarily two or three attempts are sufficient to break the bond. 6. Should the nut refuse to loosen after three attempts the application of heat will be required. CAUTION Do not exceed the maximum pressure marked on the tensioner. Excessive pressure can damage the stud and puller screw. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 27 of 38 ...
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11.2.2 Removing the Tensioner from a Stud The tensioner removal is to accomplished by the follows steps: 1. Release the hydraulic pressure by either releasing the hand switch on the AP‐0532 Pump Kit or by opening the valve on the MP‐0130 Manual Pump Kit and leave the valve open. 2. Insert 1/2” hex Allen wrench into the back side of the stud to prevent the stud from rotating while you unscrew the puller screw. 3. Unscrew the puller screw using a wrench and, if necessary, a breaker bar. Do not use an impact wrench as this can damage the tensioner. 4. Move the tool to the next stud/nut assembly to be tensioned, following the sequence/pattern as defined on the supplied data sheets. 11.3 Removal of Assemblies with Mechanical Locknuts For those assemblies which have been locked using mechanical locknuts, removal is accomplished as follows: CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 28 of 38 ...
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4. Apply the appropriate hydraulic pressure per the Table of Section 12.1. DO NOT BACK OFF THE PULLER SCREW. 5. Using the spanner ring and spanner/pin wrenches, loosen the nut, then release the pressure. Flange Position Stud Size Removal Pressure 2‐1/4" 17000 psi Turbine to Coupling [58 mm] [1170 bar] 2‐3/4" 18000 psi Coupling to Generator [71 mm] [1240 bar] 11.3.1 Removing the Tensioner from a Stud The tensioner removal is to accomplished by the follows steps: CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 29 of 38 ...
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1. Release the hydraulic pressure by either releasing the hand switch on the AP‐0532 Pump Kit or by opening the valve on the MP‐0130 Manual Pump Kit and leave the valve open. 2. Insert 1/2” hex Allen wrench into the back side of the stud to prevent the stud from rotating while you unscrew the puller screw. 3. Unscrew the puller screw using a wrench and, if necessary, a breaker bar. Do not use an impact wrench as this can damage the tensioner. 4. Move the tool to the next stud/nut assembly to be tensioned, following the sequence/pattern as defined on the supplied data sheets. 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. 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. Puller screw should be free to rotate and move back and forth. 3. Seam between cylinders closed tightly. 4. Inspect tensioner guard for any signs of damage. Bent guards should be replaced. Also, be sure the rubber pad is in place on the end of the guard, if missing, replace. ...
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Instruction Manual IM‐125 12.3 Store shipping container Secure the hydraulic pump and hydraulic tensioner into the original shipping containers using the supplied wood braces. Seal the original shipping container and store under shelter and protected from moisture, sand, and grit. 13.0 Frequently Asked Questions This section contains some frequently asked questions and problems. If the steps listed here do not solve your problem, contact the Riverhawk Company thru our website, email, or phone call. Q: Can I rent a hydraulic tensioner kit? A: Yes, Riverhawk has rental tensioner kits available for most of our hydraulic tensioners. 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 ...
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Q: The tensioner is at its final pressure, but the nut cannot be loosened. A: If the nuts cannot be loosened at the final pressure, continually increasing the pressure will not help and can be dangerous and in some cases make it harder to remove the nut. Check the nut to see if its set screws have been loosened. Check for and remove any corrosion around the nut's threads. 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 5.2.2 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 32 of 38 ...
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Instruction Manual IM‐125 Q: During the initial steps of removing a tensioned stud, the stick‐out length is found to be wrong. A: Do not proceed. 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: The hydraulic hose has a collar on it that can't be moved by hand A: The hydraulic fitting is shown in section 7.2. The collar is sometimes held in place with a thread locking compound. This prevents the collar from moving too easily. 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. Q: The tensioner has two different feet. Which one is used on generator flange and which one is used on the turbine flange? ...
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Not Used K Jan 14, 2008 Added drawing of new and old foot design for ID J Jan 09, 2007 Revised stretch valves H Dec 29, 2004 Moved caution notes G Feb 10, 2003 Added reference to 7FB F Nov 20, 2002 Added reference to Hex and Cylindrical E Oct 15, 2002 Removed reference for two tensioner feet, pg 5 section 6.0 D Apr 19, 2002 Pg 1 revised, pg 4 section 4.0, pg 10 section 11, deleted CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 34 of 38 ...
C Oct 02, 2001 Added GE Title Block to all pages B May 22, 2001 Pg 4 section 4.0, pg 15 added figure 8 A Oct 16, 2000 Pg 2 section 1.0, pg 3 section 2.5 ‐ Oct 01, 2000 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. All applicable sections of European Directive 2006/42/EC for machinery 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. ...
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Instruction Manual IM‐125 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 CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 ...
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16 8 17 9 18 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 37 of 38 ...
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14 7 15 8 16 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4000 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision W Email: info@riverhawk.com Page 38 of 38 ...
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