GE MS6001B, Maintenance Instructions Manual

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Major Inspection — Disassembly Procedures Inspection and Maintenance — GEK 107048
MI-D-3
d. The indicator must be placed in such manner to permit face readings to be taken without being
affected by end float (thrust) of the accessory gear shaft when turning the shaft.
e. Rotate the accessory gear coupling with the alignment fixture and dial indicator attached until
indicator is aligned on the top vertical face mark. Set dial indicator to read zero “0.”
f. Rotate the accessory gear coupling (and alignment fixture) through one full revolution (360
°
)
take readings at each face mark (90
°
). Record the dial indicator readings.
Note: All readings must repeat three consecutive times to be considered accu-
rate.
The indicators should return to “0” (corrected reading of zero for the
face and rim indicators) when returning to the top end of the vertical
mark. If they do not, check tightness of set-up and repeat readings. Re-
fer to the Basic Alignment Instructions (Field) in the Reference Draw-
ings section of this Service Manual.
g. Place dial indicator to read from the fixture to the rim of the turbine coupling flange.
h. Take rim readings in the same manner, except that no correction is necessary for axial move-
ment of the shaft. Record all readings on Inspection Form PGS/GT-FF-6115.
Operation 2 — Perform Combustion Inspection Disassembly Operations No. 1 Through No. 15
CAUTION
Before proceeding with a combustion inspection ensure
that the gas turbine electrical power is tagged-out; CO
2
system is deactivated, liquid fuel system is purged, deacti-
vated and/or the gas supply is blanked off. See Standard
Practices section, in this Service Manual.
Note: Refer to the Combustion Inspection section of this Service Manual for
the following disassembly operations.
1. Prepare turbine compartment roof for removal.
2. Remove turbine compartment roof and side panels.
3. Remove cooling water lines from flame detectors.
4. Remove the flame detectors.
5. Remove primary gas fuel lines (if applicable).
Note: In addition to the gas fuel lines to the fuel nozzles, unbolt and remove
the upper half gas manifold pipe also.
6. Remove transfer fuel gas lines.