GE MS6001B, Maintenance Instructions Manual

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Combustion Inspection — Reassembly Procedures Inspection and Maintenance — GEK 107048
CI-R-23
f. Listen for rubbing noises.
g. Check temperature of lube oil in bearing drains or at the bearing header and tank.
h. Observe all panel and hydraulic manifold 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 firing checks:
a. Observe applicable firing check parameters, relay sequences, exhaust temperature, vibration
and speed.
b. Check spark plugs and flame detectors.
c. Observe and record acceleration rates.
d. Record full set of vibration readings.
e. Observe and record temperature suppression set point.
f. Note and record pick-up time of all appropriate electrical speed relays.
g. Check full speed-no load rpm.
h. Check digital set point.
i. Take a complete set of running data. See Running Inspections — Section 4 for this instruction.
j. Check for air, oil, fuel and water leaks.
k. Periodically recheck torque on the fuel nozzle mounting flange bolts after shutdown.
8. Perform load checks (if applicable) as follows:
a. Take a full set of load data, including the staging times from primary only to lean–lean, and
the change from lean–lean to premixed operation. This can be done automatically by the con-
trol system.
b. Check for air, oil, fuel, gas and water leaks.
9. Observe normal unloading and shutdown as follows:
a. The times and loads for re–ignition of the primary should be recorded during the unloading
period.
b. Note and record coastdown time.
c. Listen for abnormal noises from gas turbine and associated equipment during coastdown.