Major Overhauling
(In
Co-Ordination with Electrical, Civil, Instrumentation departments)
INITIAL
MEASUREMENTS:
Rotor
"K" Position
Casing Split (half joint) Clearance
Bearing
pedestal Clearance
Casing bolts
length measurement (Before & After removal)
Coupling Bolts
length measurement (Before & After removal)
Steam
admission flange bolts length measurement (Before
& After removal)
Pedestal
clearance
Pedestal seal
clearance
Bearing seal
clearance
Journal
bearing clearance
Gland seal
clearance
Thrust bearing
clearance
Thrust bearing
seal clearance
Main oil pump
seal clearance
Initial
Alignment
SEQUENCE
OF DISMANTLING:
Remove Turning
Gear unit
Remove
coupling cover
Remove
coupling bolts
Remove Bearing
pedestals
Remove Front
& Rear gland boxes
Remove casing
bolts by heating (by special bolt heater)
Remove steam
admission flange bolts
Remove thrust
bearing housing
Remove HP, LP,
Throttle (ESV) Valve actuators.
