ABB A255-L - Dismantling the Gas Inlet Casing (≤ A275-L); Fig. 45: Dismantling the Gas Inlet Casing (275-L and Smaller); Table 32: Maximum Admissible Loosening Torque (51087)

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Operation Manual / A200-L

9 Disassembly and assembly / 9.9 Dismantling the gas inlet casing (≤

A275-L)

9.9 Dismantling the gas inlet casing (

≤

A275-L)

Fig.45: Dismantling the gas inlet casing (275-L and smaller)

Product Maximum loosening torque [Nm]

A255-L 245

A260-L 245

A265-L 245

A270-L 350

A275-L 665

Table32: Maximum admissible loosening torque (51087)

u If a threaded stud (51086) shears off when loosening, an ABB Turbocharging 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 or removed with an appropriate tool.

1. Treat nuts (51087) with rust remover.

2. Loosen crosswise and remove all nuts except for two opposite nuts(51087). Note max-

imum admissible 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.

Page 88 / 145

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