Dear Sir,

in one of the major shutdowns of GE frame 6 turbine, it was found that the exhaust casing has a major crack that required a replacement. The new exhaust casing was brought & fixed to the turbine casing. however the bearing no. 2 that the hot bearing located in frame 6 exhaust casing requires an an axial & radial alignment. Kindly guide me how to do it..

 

Dear Sir,

This is not a controls-related topic. While we do occasionally discuss non-controls-related topics, this is not one which we would probably attempt to describe in any detail on a forum like this.

Bearing alignment should be done by trained and experienced individuals using precision instruments (usually optical (laser) instruments). In the "old days" bearing alignments were done with piano wire, were not nearly as accurate, but still required training and experience. There are several axes of alignment which should be done to properly locate the bearing for optimal operation, minimal wear and to prevent vibration problems when components get hot, and when they cool down.

This is not something which can be done without proper tools (instrumentation), without knowing which tools will be used, how to use the tools, and without the bearing alignment information from the manufacturer or from experience. This is not a trial-and-error procedure; the consequences can be catastrophic, and costly.

Please have someone knowledgeable and experienced come to site with the proper equipment and competence to be able to do this properly. It will be money well-spent.

Again, this is not really a mechanical forum, and I would imagine that you should be able to find somewhere on the World Wide Web/Internet some basic steps, if not a more precise procedure. But, again, this is not something to be attempted without knowledgeable and competent instruction and guidance if you have never done something like this before (and you didn't tell us if you had or hadn't, but from the question it seems you had not).

Best of luck!