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Recently we had a Major Inspection for our GE Frame 6B GT and we decided to replace the IGV Actuator as part of the worklist. Before replacing, we took as found readings(old actuator measurements ie: gross stroke & cylinder fully retract length.) and made sure the new actuator has the same measurements(which it does with +/- 1mm accuracy).
For info, IGV blades were replaced as well since this is normal practice for us during MI.(not sure on other people's practice).
During IGV calibration, we faced a problem where our IGV actuator hit the mechanical stop which was set at 29DGA-90DGA. I believe the gross stroke of the actuator which is 38.1mm should reflect to approximately 56DGA(eg: 32DGA min- 88DGA max).
Now the problem we have is that we are not convinced to perform calibration since this is not the actuator stop, but the IGV ring mechanical stop.
I need help on whether i should just proceed with autocalib and set the min/max at 29DGA-90DGA? Or i should make any other adjustments? (to my actuator or mechanically adjust the mehanical stopper so that it goes approx 2 DGA beyond my actuator stop. (Eg my actuator min/max stroke is at 28-92 DGA then i should set mech stop at 26-94 DGA).
If you think this is a mechanical problem, kindly explain how this could happen. And if so, is there any other way that i could do when performing the IGV calibration to ensure this mechanical problem can be resolved with a good control. Everyone knows rectifying a mechanical problem would take days and everything has to be opened up again.
Some advice please as this is my first time performing this job. Thank you in advance.
Please contact me directly for fast response and further details. [email protected]
For info, IGV blades were replaced as well since this is normal practice for us during MI.(not sure on other people's practice).
During IGV calibration, we faced a problem where our IGV actuator hit the mechanical stop which was set at 29DGA-90DGA. I believe the gross stroke of the actuator which is 38.1mm should reflect to approximately 56DGA(eg: 32DGA min- 88DGA max).
Now the problem we have is that we are not convinced to perform calibration since this is not the actuator stop, but the IGV ring mechanical stop.
I need help on whether i should just proceed with autocalib and set the min/max at 29DGA-90DGA? Or i should make any other adjustments? (to my actuator or mechanically adjust the mehanical stopper so that it goes approx 2 DGA beyond my actuator stop. (Eg my actuator min/max stroke is at 28-92 DGA then i should set mech stop at 26-94 DGA).
If you think this is a mechanical problem, kindly explain how this could happen. And if so, is there any other way that i could do when performing the IGV calibration to ensure this mechanical problem can be resolved with a good control. Everyone knows rectifying a mechanical problem would take days and everything has to be opened up again.
Some advice please as this is my first time performing this job. Thank you in advance.
Please contact me directly for fast response and further details. [email protected]