Operation Manual / 4 Product description / A100-L
8 Disassembly and assembly / 8.9 Dismantling the gas inlet casing,
nozzle ring (A180-L and larger)
© Copyright 2018 ABB. All rights reserved. HZTL4034_EN Revision N November 2018
Dismantling the gas inlet casing (A180-L and larger) – threaded stud variant
Fig.43: Dismantling the gas inlet casing (180-L and larger) - threaded stud variant
Part number A180-L A185-L A190-L
51087 840 Nm 1225 Nm 1610 Nm
Table32: Maximum admissible loosening torque (51087)
u If a threaded stud (51086) shears off when loosening, an ABB Turbo Systems Service Sta-
tion should be contacted.
u If a threaded stud (51086) works loose when removing the nut (51087), it should be refit-
ted, after disassembling the gas outlet casing, up to the stop in the gas inlet casing until
hand-tight.
u If the nut (51087) cannot be removed with the maximum permissible loosening torque, it
can be heated and removed with an appropriate tool.
1. Dismantle both halves of the insulation segment(51215) and remove with all fixing ele-
ments.
2. Detach flange connection between gas inlet casing(51001) and bellows.
3. Treat nuts (51087) with rust remover.
4. Loosen crosswise and remove all but two opposite nuts(51087). Note maximum admiss-
ible loosening torque.
5. Loop around the gas inlet casing(51001) with lifting gear.
6. Loosen and remove remaining nuts(51087).
7. Fit support(90451) on gas inlet casing and put down casing.
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