ABB A175-L37 - Fig. 43: Dismantling the Gas Inlet Casing (180-L and Larger) - Threaded Stud Variant; Table 32: Maximum Admissible Loosening Torque (51087)

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
Table32: 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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