Hot Gas Path Inspection — Reassembly ProceduresInspection and Maintenance — GEK 107048
HGP-R-21
f. Place unit on ratchet and observe for leaks, abnormal noises, or control deficiencies.
g. Prime fuel pump.
6. Crank the unit, and perform the following checks:
a. Observe pickup rpm of speed sensors versus time.
b. Inspect for casing air leaks.
c. Observe and record vibration levels.
d. Observe and record maximum crank speed.
e. Check starting means for proper operation.
f. Listen for abnormal noises.
g. Check temperature of lube oil in bearing drains or at the bearing header and tank.
h. Observe all panel pressure gauge readings for abnormalities.
i. Trip unit using the emergency trip, and listen for abnormal noises from gas turbine and asso-
ciated equipment during coastdown.
j. Observe proper drop-out rpm of speed sensors.
7. Initiate a start, and perform the following zero to full-speed-no-load checks:
a. Observe applicable firing check parameters.
b. Check spark plugs and flame detectors.
c. Observe and record acceleration rates.
d. Record full set of vibration readings.
e. Observe and record temperatures suppression set point.
f. Note and record pick up time of all appropriate electrical speed relays.
g. Adjust full-speed-no-load rpm to specifications.
h. Check digital set point.
i. Take a complete set of running data and record on Operating Data form as shown in the Run-
ning Inspection section of this Service Manual.
j. Make governor checks.
k. Make overspeed checks per unit control specifications in unit Service Manual.
l. Stake sight port plugs in place, using two stakes on each plug, after shutdown.
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