Assembly Instructions / RR.. 1, RR153
4 Installing the turbocharger / 4.2 Fastening RR turbocharger to
bracket
© Copyright 2020 ABB. All rights reserved. HZTL455311P0022_EN Rev.B July 2020
4.2 Fastening RR turbocharger to bracket
The following turbochargers have to be fastened to a bracket:
¡ RR151 with bearing casing NA2
¡ RR131 with bearing casing NA4
¡ RR181
¡ RR221.
The turbocharger is fastened on one side or on both sides to a bracket with tightening
torques (01) shown in the table. If present for RR151 and RR131 (in the case of high vibration),
the support(02) must be fastened additionally using screws(03).
Fig.3: Fastening the RR..1 turbocharger to a bracket
Product Fastening to bracket (01) *)
RR151 with bearing casing NA2 2x M16
M
A
= 230 Nm ±50 Nm
RR151 with bearing casing NA4 2x M20
M
A
= 455 Nm ±105 Nm
RR181 2x M20
M
A
= 455 Nm ±105 Nm
RR221 2x M24
M
A
= 780 Nm ±180 Nm
Table6: Fastening the RR..1 turbocharger to a bracket
*) When the turbocharger is mounted on the engine support, the bolt threads and screw
heads must be lightly oiled (assumed friction coefficient µ = 0.12 for tightening torque).
u Fit all pipes in accordance with the enginebuilder's instructions.
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