Fig. 39: Dismantling The Gas Inlet Casing (275-L And Smaller) - Threaded Stud Variant; Table 31: Maximum Admissible Loosening Torque (51087) - ABB A270-L59 Operation Manual

Operation Manual / 4 Product description / A200-L
8 Disassembly and assembly / 8.7 Dismantling the insulation, the gas
inlet casing and the nozzle ring (A275-L and smaller)
Dismantling the gas inlet casing (A275-L and smaller) – threaded stud variant
Fig. 39: Dismantling the gas inlet casing (275-L and smaller) – threaded stud variant
Part number
51087
Table 31: Maximum admissible loosening torque (51087)
If a threaded stud (51086) shears off when loosening, an ABB Turbo Systems Service Sta-
u
tion should be contacted.
If a threaded stud (51086) works loose when removing the nut (51087), it should be refit-
u
ted, after disassembling the gas outlet casing, up to the stop in the gas inlet casing until
hand-tight.
If the nut (51087) cannot be removed with the maximum permissible loosening torque, it
u
can be heated and removed with an appropriate tool.
1. Treat nuts (51087) with rust remover.
2. Loosen crosswise and remove all but two opposite nuts (51087). Note maximum admiss-
ible loosening torque.
3. Loop around the gas inlet casing (51001) with lifting gear.
4. Loosen and remove remaining nuts (51087). Note maximum admissible loosening torque.
5. Carefully move out gas inlet casing and put down.
© Copyright 2018 ABB. All rights reserved.
A265-L
245 Nm
HZTL4036_EN
A270-L
350 Nm
Revision M
A275-L
665 Nm
August 2018