ABB A255-L - Fig. 67: Ensuring Clamping of the Cover Ring; Table 49: Required Washers (01); Table 50: Tightening Torque (57005)

Operation Manual / A200-L
10 Taking a turbocharger out of operation / 10.2 Taking defective tur-
bochargers out of operation
© Copyright 2021 ABB. All rights reserved. HZTL4036_EN Rev.T December 2021
10.2.5 Engines without bypass around the turbocharger
To obtain a higher engine performance, the nozzle ring can be removed if required (see
chapter Disassembly and assembly →70).
Securing the cover ring
If the nozzle ring is removed for emergency operation, the clamping of the cover ring(57001)
to the gas outlet casing must be ensured. In this case, additional washers(01) must be
provided in accordance with the following table. These washers(01) are not supplied by ABB.
Fig.67: Ensuring clamping of the cover ring
Product h [mm] d1 [mm] d2 [mm]
A255-L 3.5 … 4.0 10 16
A260-L 3.5 … 4.0 10 16
A265-L 3.5 … 4.0 13 20
A270-L 3.5 … 4.0 13 20
A275-L 4.0 … 5.0 17 28
A280-L 4.0 … 5.0 21 34
Table49: Required washers (01)
Part number A255-L A260-L A265-L A270-L A275-L A280-L
57005 M8
20 Nm
M8
20 Nm
M12
50Nm
M12
50Nm
M16
80Nm
M20
160Nm
Table50: Tightening torque (57005)
1. Remove screws(57005).
2. Fit and tighten screws(57005) with high-temperature grease and washers(01) in accord-
ance with the table.
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