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Inspection and Maintenance
Inspection
Cooling Water Radiator Fan
Module
Cooling Water Pump
FALSE START DRAIN VALVE
False Start Drain Valve
SPEEDTRONIC
Control Loop
What to Inspect for
Dirty Wheel Housing, Ducts and
Screens
Excessive Vibration Noise
Damaged Blades
Loose Mounting Bolts
Air Flow Obstructed
Rust, Corrosion and Peeling
Leakage Shaft Seal
Dirty Shaft Seal Cooling Water Line
and Filter Element
Excessive Wear Ring Clearance
Excessive Mechanical Seal Wear
Incorrect Sequencing During Startup
and Shutdown
Improper Operation of Valve Actuator
Air and Oil Leaks
Worn Diaphragm in Valve Actuator
Flow Unstable, Hot Starts,
Overtemperature
Calibration FSR Versus Fuel Flow
LVDTs
Electronic Trip Actuation of 20FL and
20HD
Check 20FL for Proper Null Bias
LVDT Feedback at Firing Speed
Versus FSR
Auxiliary and Controls Systems Maintenance
Inspection
Frequency and
Turbine Status
A — S
A — O
A — S
A — S
A — S
A — S
M — O
A — S
Maj — S
Maj — S
A — O
A — O
D — O
A — S
D — O
A — S
SA — S
SA — S
A — O
Document
or Page
Reference
IMP–11
IMP–11
IMP–12
Control
Specification–
Operating
Instructions and
Sequences and
Control
Specification–
Control System
Adjustments
ACSM–7
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