Measurements

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.