Instruction Manual IM‐186
CUSTOMER'S INFORMATION BOX
CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL
215 Clinton Road
New Hartford, NY 13413
Tel: +1 315 768 4855
Fax: +1 315 768 4941
Email: [email protected]
REV
373A4016
GE DRAWING NUMBER
Revision E
Page 14 of 23
9.2 Removing the Tensioner from an Installed Stud
The tensioner removal is to accomplished by the follows steps:
1.
Release the puller tool pressure by opening the valve on the pump (Hand Pump Version
MP‐0130). Leave the valve open. This is automatic on the air‐operated hydraulic pump.
2.
Unscrew the puller screw using a wrench
3.
Tapping the wrench with a hammer may be necessary to loosen the puller screw.
4.
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. Measures the length
of the studs after all have been tensioned. The final pressure and required stretch values are
listed in the following table
Flange Position
Stud Size
Final Pressure
Final Stretch
Turbine to Coupling
2.246"
[57.05 mm]
17000 psi
[1170 bar]
0.034" ‐ 0.036"
[0.86 mm ‐ 0.91 mm]
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.
CAUTION
DO NOT EXCEED THE MAXIMUM PRESSURE VIBROSCRIBED ON THE PULLER BODY. Excessive
pressure can damage the stud and puller screw.
Excessive stretch variation or low stretch values can be corrected by retensioning all or selected
studs to the pressure values stated above. 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.
