Page 1
____ OF ____ GE SIGNATURES DATE GE DRAWING NUMBER CHECKED: 373A4035 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 H Field Service Email: info@riverhawk.com Page 1 of 37...
Page 2
12.0 Storage 27 13.0 Frequently Asked Questions 28 14.0 Revision History 30 Appendix A1 EC Declaration of Conformity 31 Appendix A2 UKCA Declaration of Conformity 32 Appendix B1 Hydraulic Fittings 33 Appendix B2 Puller Screw Release Tape 34 Appendix B3 Hydraulic Tensioner’s Burst Disc Replacement 35 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 2 of 37...
Page 3
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 SAFETY GUARD MUST INSTALLED ON THE FLANGE BEFORE TENSIONING BEGINS. DO NOT USE THE TENSIONER ASSEMBLY AT ANY PRESSURE UNLESS THE TOOL IS INSTALLED ON THE FLANGE. WARNING ...
Page 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. This procedure will ease assembly and assure positive mating of the threads before tightening. 2.0 Scope This document describes the steps to install a set of hardware containing the studs and nuts supplied by Riverhawk Company at the turbine/coupling and coupling/generator connections. This hardware is depicted on the following drawings. These drawings as well as tooling drawings form part of this manual. Riverhawk GE Drawing GE Ordering Sheet Hardware Set ...
Page 5
Instruction Manual IM‐257 2‐3/4" hardware for the 101T3628P005 generator end of the 7FA/7FB HF‐0803 359B2520 101T3628P0006 load coupling and for the steam 101T3628P0007 turbine to 7FH2 generator connection. denotes GE part numbers that include hydraulic tooling Hydraulic tensioners with safety interlock (see section 4.5) can also be used with other tensioned hardware sets. Riverhawk GE Drawing GE Ordering Sheet Hardware Set Hardware Set Part Number for Part Number Description Number Hardware Set 358A7202P001 2‐1/4" hardware for the turbine end 358A7202P012 # and 2‐3/4" hardware for the generator end for the 7FA/7FB load HF‐0771 359B2514 361A5218P001 coupling. ...
denotes GE part numbers that include older installation tooling that do not include a built‐in safety interlock. 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. ...
Page 7
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. □ Slide foot over the puller screw and orientate into position. Thread the tensioner onto 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 guard over tensioner and position guide pin into the hole in the backside of the stud. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 7 of 37...
Page 8
the puller screw. □ Remove the foot. □ Remove the puller screw from the stud. □ Remove the spanner ring from the nut and move to the next stud in the pattern. □ Tension all studs to 50% before proceeding to final pressure. □ Repeat the above steps at the final pressure. Measure the final stud length and record on the stretch datasheets. Calculate the stretch □ and verify per section 9.2 □ Torque the nuts’ set screws per section 10 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 8 of 37...
Page 9
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 □ backside of the stud. 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 9 of 37...
Page 10
Remove the spanner ring from the nut. □ 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 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 10 of 37...
Page 11
When not in use, the tensioner shall be maintained in a clean environment with all caps and plugs for hydraulic openings and fittings in place. Use ISO 32 grade oil. 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 9” to 10” micrometer or caliper 10” to 11” micrometer or caliper 4.5 Special Tools Hydraulic Tensioner Kit: HT‐5222 Hydraulic Tensioner (for counterbore flanges) (reference GE 269B8697) CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 11 of 37...
Page 12
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. 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 CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 ...
Page 13
Instruction Manual IM‐257 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 Obsolete hardware sets employed a thread‐locking compound which is visible as a grayish‐green residue. Riverhawk Company strongly recommends replacing this type with the current nut that has a re‐ useable mechanical locking feature. Special instructions are available from Riverhawk if it has been decided to continue to use the obsolete hardware. 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. The conical threads of each stud must be clean 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 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 ...
Page 14
5. Blow out the threads with compressed air to remove loosened debris. 6. Visually inspect threads for cleanliness. Threads should be bright and shiny. 7. Repeat if any dirt can be seen in the threads. 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. 5.2.3 Very Old Installations Obsolete hardware sets employed a thread‐locking compound which is visible as a grayish‐green residue. Riverhawk Company strongly recommends replacing this type with the current hardware that has a re‐useable mechanical locking feature. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com...
Page 15
Instruction Manual IM‐257 Special instructions are available from Riverhawk if it has been decided to continue to use the obsolete hardware. 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. 6.0 Stud and Nut Assembly Refer to Hardware Set Part Number drawing listed in Section 2.0 of this manual. If you don’t have a hardware set drawing, it can be found in the GE drawing system or contact Riverhawk Company. Assemble the nut to the conical tensioning thread end (front side) of the stud. Slide the assembly into the flange from the coupling side as shown in Figures 1 & 2 then install the other nut on the backside. Ensure that backside’s nut orientation is correct with thread locking screws facing outward of the flange. ...
Page 16
Instruction Manual IM‐257 Figure 1 – Cutaway View of Turbine Flange and Coupling Flange Bolted Joint 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) CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 16 of 37...
Page 17
SIDE OF THE FLANGE. The stick‐out length can be checked three different ways. 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 17 of 37...
Page 18
Instruction Manual IM‐257 7.0 Hydraulic Equipment Preparations 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. 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 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). ...
Page 19
Instruction Manual IM‐257 Burst disc replacement instructions are shown in Appendix B3 or refer to Riverhawk Instruction Manual IM‐363 (GE VENDOC 373A4077) for more information. 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. 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 ...
Page 20
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 foot. DO NOT TIGHTEN TENSIONER AGAINST FOOT. (GAP SHOULD BE 1/16” to 3/16”) 12. Place guard over tensioner and position guide pin into hex end of stud. 13. Tighten knurled interlock fitting by hand until it firmly presses against tensioner. (no gap) 14. Activate custom connector from rear of guard by pushing on the center with your thumb and pulling the tabs with your fore finger and middle finger. Push the assembly forward until it 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 20 of 37...
Page 21
Figure 3 – Activation of the custom connector Figure 4 – Cutaway View of Tensioner Installed on 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. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 21 of 37...
Page 22
Instruction Manual IM‐257 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. 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 ...
Page 23
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. 9.3 Tensioning at Final Pressure Repeat the pulling and tightening procedure stated above at full pressure. Measure the stud length after all of the studs have been tensioned. The final pressure and required stretch values are listed in the following table. WARNING The safety guard 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 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 23 of 37...
Page 24
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" Coupling to Generator [71 mm] [1240 bar] [0.31 mm ‐ 0.36 mm] 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 Thread Locking Once pulling and tensioning is completed all stud nuts must be locked in position. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 24 of 37...
Page 25
Instruction Manual IM‐257 (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 Begin by checking the stick‐out dimension of the installed studs. If the stick‐dimensions are wrong, contact Riverhawk for assistance. Sections 11.1 and 11.2 respectively describe the procedures to be followed in removing nuts with the mechanical locking feature and those that have been locked with liquid locking compound. ...
Page 26
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. 11.2.1 Removal of Assemblies with Liquid Locking Compound Obsolete hardware sets employed a thread‐locking compound which is visible as a grayish‐green residue. Riverhawk Company strongly recommends replacing this type with the current hardware that has a re‐useable mechanical locking feature. Special instructions are available from Riverhawk to remove this obsolete hardware. CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 ...
Page 27
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. 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. Seal the original shipping container and store under shelter and protected from moisture, sand, and grit. ...
Page 28
Instruction Manual IM‐257 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: 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 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: ...
Page 29
A: 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. 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: The hydraulic hose has a collar on it that can't be moved by hand The hydraulic fitting is shown in section 7.2. The collar is sometimes held in place with a ...
Page 30
E Sep 26, 2016 Added HT‐7591 to section 4.5 D Jan 15, 2015 Updated sections 1.0 and 4.3. C Mar 17, 2012 Revised section 2.0 tables, Updated title page to reflect all parts that can be used with installation tooling. B Feb 15, 2012 Misc. updates including spelling and terminology clarifications A Dec 14, 2011 Added GE 101T3628 references to title page and to section 2.0 ‐ Jul 19, 2011 Released CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 30 of 37...
Instruction Manual IM‐257 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 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 ...
Page 32
Instruction Manual IM‐257 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 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 ...
Page 33
Instruction Manual IM‐257 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 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 ...
Page 34
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 ‐Release tape should only be used for stud installation; puller screw engagement does not require the use of release tape during de‐tensioning of the studs. ‐Do not substitute for Riverhawk release tape, contact Riverhawk for support (+1) 315‐768‐4855 or www.Riverhawk.com CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 ...
Page 35
Instruction Manual IM‐257 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 CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 ...
Page 36
16 8 17 9 18 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 36 of 37...
Page 37
14 7 15 8 16 CUSTOMER'S INFORMATION BOX CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL GE DRAWING NUMBER 215 Clinton Road 373A4035 New Hartford, NY 13413 Tel: +1 315 768 4855 Fax: +1 315 768 4941 Revision H Email: info@riverhawk.com Page 37 of 37...
Need help?
Do you have a question about the IM-257 and is the answer not in the manual?
Questions and answers