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5.6 Orient the seal so the drive collar end is facing away from the rotor.
Carefully slide the seals onto the appropriate shaft diameter without
the sleeve gaskets 19 and drive collars 58 . If the split rings pop
out, reinstall them.
Note: The gland bolts will be installed after the turbine is assem-
bled.
5.7 Install the sleeve gaskets 19 and drive collars onto the shaft and
slide them into location against the sleeve end. Be careful not to
damage the sleeve gaskets when sliding them onto the pilot diam-
eter.
5.8 Lubricate the sleeve gasket compression screws 40 with anti-seize
and install them into the adjusting collar 129 finger tight. Be care-
ful not to dislodge the split rings when threading the screws into the
adjusting collar.
Important Note: In some instances it may be difficult to get the
screw started. In this case, use a longer screw in 1-3 locations to
compress the gasket enough to get the shorter screws started.
Remove the longer screws and start the remaining shorter
screws, again only finger tight. If the longer screws are not removed,
they will extend behind the adjusting collar after final installation.
This reduces the allowable axial travel of the seal and could cause
failure if the screws contact the flange.
5.9 Install the other turbine rotor components onto the shaft.
5.10 Temporarily secure the seals into position on the rotor.
5.11 Install the rotor assembly into the turbine. Take care not to damage
the flange gaskets.
5.12 Locate the seals and gaskets so they do not interfere with the
lowering of the top half of the casing.
5.13 Install the turbine bearing caps.
5.14 Install the top half of the turbine casing. Refer to the turbine manu-
facturer's recommendation for use of split-line sealant and torque
values for case bolts. Ensure that split line sealants do not come
into contact with the seal faces.
Important note: Be very careful if using any sort of flat gasket or
"string" gasket to seal the case split line. Either of these gaskets
will create a gap between the turbine cover and the case. Unless
the flat gasket is flush with the bore of the turbine and the face
where the seals bolt on, the GTS flange gasket 18 will not seal
this gap and will leak.
8
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