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Applicable Bolting Connections Steam Turbine LP Rotor to Generator Applicable GE Ordering Sheet Part Numbers 131T6314P0001 131T6314P0002 131T6314P0003 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE Power & Water GENERAL ELECTRIC COMPANY VENDOR SUPPLIED GE NOT TO REVISE. GE REVISION LEVEL IS SHOWN ON THIS APPLIQUE. THIS DOCUMENT IS FILED UNDER THE GE DRAWING NUMBER. THIS DOCUMENT SHALL BE REVISED IN ITS ENTIRETY. ALL SHEETS OF THIS DOCUMENT ARE THE SAME REVISION LEVEL AS INDICATED IN THIS VENDOR SUPPLIED DRAWING APPLIQUE. MLI: ____ OF ____ GE SIGNATURES DATE GE DRAWING NUMBER CHECKED: 138T6569 ISSUED: ...
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Storage Instructions 32 13.0 Frequently Asked Questions 33 14.0 Revision History 35 Appendix EC Declaration of Conformity 36 A1 Appendix UKCA Declaration of Conformity 37 A2 Appendix 16‐Bolt Tensioning Pattern (LP‐GEN) Record Sheet 38 B1 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 2 of 38 ...
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Instruction Manual IM‐477 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 fluid injection. Riverhawk tools operate under high pressure. Thoroughly inspect all hoses and connections for damage or leaks 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 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. ...
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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 WARNING Do not use a hydraulic tensioner to remove a stud with damaged conical threads. 2.0 Scope and GE Part Number Cross Reference This document describes the procedure to be used to install the stud, nut, and windage plug sets supplied by the Riverhawk Company in the flanges at the LP to Generator connection. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 4 of 38 ...
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Instruction Manual IM‐477 The hydraulic tooling used in this application can be identified by its ORANGE safety guard. If the safety guard is YELLOW, a different set of instructions are required. Consult the Riverhawk factory for assistance. The various frame configurations covered in this manual are listed in Sections 2.1 through 2.2 with differences as related to connective hardware defined. Listed also are the pertinent hardware drawings (HF‐xxxx). These drawings as well as tooling drawings (HT‐xxxx) form part of this manual. 2.1 Steam Turbine LP Rotor to Generator GE Part Number Riverhawk P/N GE VENDOC P/N 131T6314P0001 HF‐8857 GE 101B0770 The hydraulic tooling used for installation and removal is Riverhawk HT‐9018. This hardware drawing depicts the stud, nut, and windage plug set for the LP rotor to Generator (2‐1/4” size, Qty 16). 2.2 Hydraulic Tooling GE Part Number Riverhawk P/N GE VENDOC P/N 131T6314P0002 HT‐9018 GE 101B0774 131T6314P0003 AP‐0532 GE 359B2502 3.0 Quick Checklist ...
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□ threads and nut face with clean turbine oil or spray lubricant. □ Install the studs and nuts (off‐center) into the flange. □ Set the stick‐out dimension on the LP side of the flange. With an Allen wrench in backside of stud to prevent rotation, firmly seat the backside nut □ using the spanner ring and pin wrench. □ Verify the stick‐out measurement on the LP side of the flange. (VERY IMPORTANT) TENSIONING (Bolt Installation) □ Check the tensioner drawing for the correct parts and part numbers. Apply a light coat of clean turbine oil or spray lubricant to the puller screw and the two □ retention screws. DO NOT USE “NEVER SEIZE” ON THE CONICAL THREADS. Install the retention screws into the adjacent studs on either side of the stud to be □ tensioned. □ Install the spanner ring onto the nut. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 6 of 38 ...
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□ The retention screws must be inside the guard’s pocketed slots. Push the center of the interlock fitting towards the tensioner while pulling back on the □ fitting’s outer pull tabs until it locks onto the tensioner and release the pull tabs. □ Install the backside guard to cover the stud to be tensioned. Connect the hydraulic pump to the tensioner and tension to 50%. Consult manual for □ correct pressure. Use the pin wrench to turn the spanner ring to firmly tighten nut with 20 ft∙lbs [27 N∙m] of □ torque. □ Release the pressure and allow the tensioner to fully retract. Disconnect the hose and release the interlock fitting by pushing the center of the interlock □ fitting towards the tensioner while pulling back on the fitting’s outer pull tabs. □ Remove the backside guard. □ Loosen the knurled interlock fitting and remove the guard. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 7 of 38 ...
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Install the windage plugs and torque their set screws. DETENSIONING (Stud Removal) □ Loosen the windage plugs’ set screws and remove the windage plugs from the studs. □ Loosen the nuts' set screws. Inspect and clean the 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 and to the two □ retention screws. DO NOT USE “NEVER SEIZE” ON THE CONICAL THREADS. Install the retention screws into the adjacent studs on either side of the stud to be □ tensioned. □ Install the spanner ring onto the nut. □ Thread the puller screw into the stud. □ Insert an 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 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 8 of 38 ...
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□ Install the backside guard to cover the stud to be tensioned. Connect the hydraulic pump to the tensioner and tension to final pressure. Consult □ manual for correct pressure. □ Loosen the nut with the spanner ring and pin wrench. □ Release pressure and allow the tensioner to fully retract. Disconnect the hose and release the interlock fitting by pushing the center of the interlock □ fitting towards the tensioner while pulling back on the fitting’s outer pull tabs. □ Remove the backside guard. □ Loosen the knurled interlock fitting and remove the guard. □ Unscrew the tensioner from the puller screw. Remove the foot, puller screw, spanner ring, and retention screws. It may be necessary to □ insert an Allen wrench into the backside of the stud to remove the puller screw. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 9 of 38 ...
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Instruction Manual IM‐477 □ Move to next stud in pattern 4.0 General Preparations Read and understand all instructions before installing and tensioning the 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 and pin wrench. 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 shafts is 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 The studs are supplied in component balanced sets. A stud can be exchanged with another stud in its set without affected the overall balance of the equipment. Do not exchange a stud from one set with another stud from a different set. When shipped from Riverhawk, the studs are not assigned to any specific hole in the load coupling flange; this is optional and can be done at ...
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Instruction Manual IM‐477 The nuts are supplied in component balanced sets. A nut can be exchanged with another nut in its set without affected the overall balance of the equipment. Do not exchange a nut from one set with another nut from a different set. When shipped from Riverhawk, the nuts are not assigned to any specific hole in the load coupling flange; this is optional and can be done at the installation site. The set size is determined by the relevant GE order drawing (see section 2.0). The windage plugs are supplied in component balanced sets. A windage plug can be exchanged with another windage plug in its set without affected the overall balance of the equipment. Do not exchange a windage plug from one set with another windage plug from a different set. When shipped from Riverhawk, the windage plugs are not assigned to any specific hole in the load coupling flange; this is optional and can be done at the installation site. The set size is determined by the relevant GE order drawing (see section 2.0). A weight balance certification is supplied with each order. Store this certification in an appropriate location as it will be needed for the purchase of replacement equipment. 4.3 Tensioner – Care and Handling When not in use, the tensioner shall be maintained in a clean environment and all caps and plugs for hydraulic openings and fittings must be in place. Use ISO 32 grade oil. When in use, the tensioner shall be protected from sand and grit. See section 12 for long term storage requirements. 4.4 Hand Tools Several hand wrenches and micrometers may be required to perform installation and measurement of the studs: 5/8” Wrench 3/4” Wrench A set of Allen Wrenches 3’ to 4’ Breaker Bar 16” to 20” Micrometer or Caliper ...
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Instruction Manual IM‐477 4.5 Special Tools Hydraulic Tensioner Kit: HT‐9018 Hydraulic Tensioner, 2‐1/4” (reference GE VENDOC 101B0774) Hydraulic Pump Kit: AP‐0532 Air‐Operated Hydraulic Pump (reference GE VENDOC 359B2502) 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 (2) Locking (2) Spanner Set Screws Ring Holes Picture 5A ‐ 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. 5.1.1 Nut Cleaning ‐ New Installations For new installations, the nuts should come sealed from the factory and will need no cleaning. CUSTOMER'S INFORMATION BOX ...
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Instruction Manual IM‐477 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. 5.2 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: 1. Blow out the threads with compressed air to remove loose debris and dry conical threads. 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. ...
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Plan to start and finish any flange in the same day. Studs and flange must be at the same temperature. Number each stud with a marker for later stretch measurement tracking. Mark the location of measurement on stud end with a permanent marker. 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 the hardware assembly drawing (HF‐xxxx) listed in Section 2.0 of the manual. 1. Assemble the cylindrical nut to the internal, conical thread end of the stud. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 14 of 38 ...
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Conical Thread * Set Stud Stick‐out Generator on this side only Flange LP Rotor Flange Figure 6A – Cross‐section View of Steam Turbine LP Rotor to Generator Bolted Flange Connection 5. Install the other nut on the backside. 6. Adjust the nut/stud assembly so that the stud protrudes (or sticks out) from the face of the cylindrical nut the distance specified on the hardware drawing (HF‐xxxx). SETTING THIS PROTRUSION OF STUD TO NUT IS CRITICAL FOR PROPER TENSIONER OPERATION. A metal stick‐out gage is provided with the tensioner to assist the operator in setting the protrusion dimension. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 15 of 38 ...
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Picture 6C – Use of Drop Gage to Picture 6D – Use of Calipers to measure stick‐out measure stick‐out 7. With Allen wrench in backside of the stud, firmly seat the backside nut using the spanner ring and pin wrench. 8. Recheck the stud stick‐out length. If the stick‐out length does not match the hardware drawing, adjust the nuts as necessary. 7.0 Hydraulic Tensioner Equipment Assembly 7.1 Hydraulic Equipment Inspection CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 16 of 38 ...
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Instruction Manual IM‐477 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 air bleeding. See section 8.3 WARNING To avoid failure, ensure safety, and proper operation, the tensioner assembly must be installed on a stud in the flange pressurizing the tensioner. Do not use the tensioner at any pressure unless the tool is installed on a stud in a flange. Clean the 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. Also, be sure the rubber pad is in place on the back side 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 (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 The hydraulic tensioner’s burst disc is a key element in the overall safe use of the hydraulic tensioner. The burst disc’s location is shown on the tensioner’s technical drawing (Riverhawk HT‐xxxx listed in section 2.0 and 4.5). 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. ...
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Instruction Manual IM‐477 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 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. 7.2 Hydraulic Fittings Riverhawk hydraulic pumps 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 ...
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N‐m). Tips: Make sure all parts are clean and free from debris. Protect the cone on the end of the 1/4” tube or 1/4” hose end from scratches as this is the sealing surface. Illustration 3 Replace red plastic caps when finished to protect the threads and cone. 8.0 Assembly of the Tensioner onto a Stud The tensioner used in this application can be identified by its ORANGE safety guard. If the tensioner’s safety guard is YELLOW, a different set of instructions are required. Consult the Riverhawk factory for assistance. 8.1 Handling of the Tensioner The tensioner used in this application is designed to require no special lifting instructions. Do not drop any part of the tensioner on the operator or other nearby personnel. 8.2 Kit Assembly Connect the hydraulic hose from the hydraulic pump to the tensioner. Refer to the hardware assembly drawing (HF‐xxxx) listed in Section 2.0 of this manual and the tensioner assembly drawing (HT‐xxxx) listed in Section 4.5 of this manual to determine how the tensioner must be assembled on the load coupling for its correct operation. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL ...
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LP Flange Cylinder Picture 8A – Features of the Hydraulic Tensioner HT‐9018 Safety Guard Pin Wrench Foot Hose Connection Backside Safety Guard Knurled Interlock Fitting Hydraulic Cylinder Spanner Ring Puller Screw Figure 8B – Cutaway view of the Hydraulic Tensioner HT‐9018 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 20 of 38 ...
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Note: Before threading the puller screw and the two retention screws into the studs, carefully check the cleanliness of both the stud's, the puller screw's, and the retention screws’ conical threads. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw and the two retention screws. Do not use “Never Seize” on the conical threads. This procedure will ease assembly and assure positive mating of the threads before tightening. Assembly sequence is as follows: 1. Open the hydraulic return valve on the pump to allow hydraulic fluid to be pushed back from the puller tool into the pump reservoir. (This is automatic on the air‐operated hydraulic pump) 2. Thread the retention screws into the adjacent studs on either side of the stud to be tensioned until hand tight. 3. Place the spanner ring on the nut. 4. Insert the puller screw release tape per Riverhawk manual IM‐336. 5. Insert the puller screw into the tapered thread of the stud and hand tighten. Be sure not to cross‐thread the puller screw. 6. Using an Allen wrench, tighten the puller screw and then back off the puller screw 1/2 a turn. Retighten the puller screw by hand until it is fully inserted. DO NOT BACK OFF THE PULLER SCREW. 7. Place the foot over the puller screw and orientate it into position. 8. Thread the tensioner onto the puller screw until it stops. Please note that the internal stop inside the tensioner will cause a gap in between the foot and tensioner. The gap should be 1/16” [1.6mm] to 3/16” [4.8mm]. DO NOT ATTEMPT TO TIGHTEN THE TENSIONER AGAINST THE FOOT. 9. Place the orange guard over the tensioner and position the pocketed slots into the retention screws. 10. Tighten the knurled interlock fitting by hand until it firmly presses against the tensioner. There should be no gap between the tensioner the interlock fitting. ...
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14. Connect the hydraulic pump to the tensioner. The tensioner should now be completely assembled and ready for use. 8.3 Air Bleeding Hydraulic System Air bleeding of the hydraulic system is not necessary with this tensioner design. 9.0 Stud 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 record sheets found at the end of this manual. 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 22 of 38 ...
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[58.64 mm] [620 bar] Do not use Firmly tighten the cylindrical nuts with approximately 20 ft∙lbs [27 N∙m] of torque using the pin wrench and spanner ring. Turn the nut until it bottoms on the flange. 9.2 Removing the Tensioner from an Installed Stud The tensioner removal is 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. Remove the backside guard. 3. Unscrew the knurled interlock fitting at the end of the guard and remove the guard from the tensioner. 4. Unscrew the tensioner from puller screw. 5. Remove foot from around the puller screw. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 23 of 38 ...
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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 and the retention screws into the studs, carefully check the cleanliness of both the stud's, the puller screw's, and the retention screws’ conical threads. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw and the two retention screws. 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 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 24 of 38 ...
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Failure to achieve the correct final stretch values will result in an incorrectly tensioned stud. Incorrect stretch values can be corrected by uninstalling some or all of the selected studs. Re‐ measure the initial length of the studs and repeat the installation instructions studs. Excessive stretch variations can also be corrected by the same method. Have final stretch values approved by the supervisor responsible for the installation. 10.0 Nut Thread Locking and Windage Plug Installation 10.1 Nut Thread Locking (2) Locking (2) Spanner Set Screws Ring Holes Picture 10A ‐ 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 thereby creating the desired locking action. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 ...
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10.2 Windage Plug Installation Refer to the hardware assembly drawing (HF‐xxxx) listed in Section 2.0 of this manual to determine if windage plugs are required for the installation. Along with other identifying markings, the windage plug’s part number can be found on the plug’s top surface as shown in the picture below. Pictorial Representation of a Windage Plug Part Number and Letter Code Marking Picture 10B – Windage Plug’s Markings To install the windage plug, use the following instructions: 1. Inspect the stud’s conical thread. It should have a bright and shiny appearance. The threads should be visually checked for any damage. Refer to Section 5.2 or Riverhawk Instruction Manual IM‐220 (GE Vendoc 373A4025) for assistance. 2. Apply a light coat of clean turbine oil to the stud. CAUTION Before installation, carefully check the cleanliness of the windage plug’s and the stud's threads. Apply a light coat of clean turbine oil to the stud’s conical thread. This procedure will ease assembly before tightening. Do not use “Never Seize” on any surface or thread. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 ...
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Windage Plug P/N Installation Torque 80‐90 in‐lbs. 7002259 [9.0‐10.1 Nm] Cylindrical Nut Figure 10D WARNING Do not use lock‐tite on any of the threads and do not stake any component of this assembly. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 27 of 38 ...
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Wrong Installation Position Correct Installation Position Pressed against Opposite Surface. No Gap. Partially Loose Set screw Picture 10E – Set Screw Position 11.0 Stud and Nut Removal The tensioner used in this application can be identified by its ORANGE safety guard. If the tensioner’s safety guard is YELLOW, a different set of instructions are required. Consult the Riverhawk factory for assistance. 11.1 Handling of the Tensioner The tensioner used in this application is designed for no special lifting instructions. Do not drop any part of the tensioner on the operator or other nearby personnel. 11.2 Stud and Nut Removal 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL ...
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Refer to the hardware assembly drawing (HF‐xxxx) listed in Section 2.0 of this manual and the tensioner assembly drawing (HT‐xxxx) listed in Section 4.5 of this manual to determine how the tensioner must be assembled on the load coupling for its correct operation. Section 8.0 contains diagrams of the tensioner equipment. Note: Before threading the puller screw and the two retention screws into the studs, carefully check the cleanliness of both the stud's, the puller screw's, and the retention screws’ conical threads. Apply a light coat of clean turbine oil or a spray lubricant to the puller screw and the two retention screws. Do not use “Never Seize” on the conical threads. This procedure will ease assembly and assure positive mating of the threads before tightening. Disassembly sequence is as follows: 1. Using a wire brush (GT‐4253) and shop air, clean the internal tapered thread of the stud to remove any debris/deposits which may have accumulated during service as described in section 5.2.2. Do not continue until ALL debris is removed from the threads. WARNING Do not use a hydraulic tensioner to remove a stud with damaged conical threads. 2. With an Allen‐wrench loosen the two locking set screws but do not remove from the nut. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 29 of 38 ...
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Instruction Manual IM‐477 Picture 11A ‐ Loosening of a nut's set screws 3. Connect the hydraulic hose from the hydraulic pump to the tensioner. 4. Open the hydraulic return valve on the pump to allow hydraulic fluid to be pushed back from the puller tool into the pump reservoir. (This is automatic on the air‐operated hydraulic pump) 5. Thread the retention screws into the adjacent studs on either side of the stud to be tensioned until hand tight. 6. Place the spanner ring on the nut. 7. Insert the puller screw release tape per Riverhawk manual IM‐336. 8. Insert the puller screw into the tapered thread of the stud and hand tighten. Be sure not to cross‐thread the puller screw. 9. Using an Allen wrench, tighten the puller screw and then back off the puller screw 1/2 a turn. Retighten the puller screw by hand until it is fully inserted. DO NOT BACK OFF THE PULLER SCREW. 10. Place the foot over the puller screw and orientate it into position. 11. Thread the tensioner onto the puller screw until it stops. Please note that the internal stop inside the tensioner will cause a gap in between the foot and tensioner. The gap should be 1/16” [1.6mm] to 3/16” [4.8mm]. DO NOT ATTEMPT TO TIGHTEN THE TENSIONER AGAINST THE FOOT. 12. Place the orange guard over the tensioner and position the pocketed slots into the retention screws. 13. Tighten the knurled interlock fitting by hand until it firmly presses against the tensioner. There should be no gap between the tensioner the interlock fitting. CUSTOMER'S INFORMATION BOX ...
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16. Install the backside guard by attaching it to the flange face. It should be centered over the stud to be tensioned and lightly threaded into backside of the adjacent studs. 17. Connect the hydraulic pump to the tensioner and apply the appropriate hydraulic pressure per this table. Flange Position Stud Size Removal Pressure Steam Turbine LP Rotor to 2‐1/4" 18000 psi Generator [58.64 mm] [1240 bar] 18. Turn the spanner ring with the pin wrench. Loosen and turn the nut approximately 3/4 of a turn. 19. Release the hydraulic pressure. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 31 of 38 ...
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5. Remove the foot from around the puller screw. 6. Unscrew the puller screw using an Allen wrench. Tapping the Allen wrench with a hammer or the use of a 3‐4’ breaker bar may be necessary to loosen the puller screw. Do not use an impact wrench as this can damage the puller screw. 7. Remove the spanner ring from the nut. 8. Unscrew the retention screws using an Allen wrench. It may be necessary to tap the Allen wrench with a hammer or use a 3‐4’ breaker bar to loosen the retention screws. Do not use an impact wrench as this can damage the retention screws. 9. Move the tool to the next bolt hole following the tensioning pattern from the stretched record sheets at the end of this manual. 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 ...
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Instruction Manual IM‐477 12.2 Hydraulic Tensioner Storage Check the tensioner for any damage 1. Clean puller screw and the two retention screws. Check for any debris and dents. 2. Knurled interlock fitting should be clean and free to rotate. 3. Inspect the tensioner guard for any signs of damage. Bent guards must be replaced. If any damage is observed, contact the Riverhawk Company to schedule a maintenance inspection. Place the protective plastic cap on the guard’s knurled interlock fitting. Coat the hydraulic tensioner 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. 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. ...
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Instruction Manual IM‐477 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? A: Do not increase the hydraulic pressure. Check if the hydraulic pump is set to the right pressure. Install the tensioner and re‐pressurize the tensioner to the final pressure then recheck the stretch measurement. If the stretch value is still short, remove the stud from the hole and re‐measure the stud's initial length then try to install the stud again. Q: The hydraulic tensioner has been taken up to its final pressure. The final stretch length is larger than the final stretch target. What is the next step? A: Remove the stud from the bolt hole. Check if the hydraulic pump is set to the right pressure. Re‐measure the stud's initial length then try to install the stud again. Q: The tensioner is at its final pressure, but the nut cannot be loosened. ...
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Instruction Manual IM‐477 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 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 ...
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Instruction Manual IM‐477 ‐ Jan 15, 2021 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road ...
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Instruction Manual IM‐477 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 138T6569 New Hartford, NY 13413 ...
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4 10 2 6 14 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 138T6569 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision C Email: info@riverhawk.com Page 38 of 38 ...
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