ABB A275-L59, Operation Manual, Page: 121 / 136

Operation Manual / 4 Product description / A200-L
9 Taking a turbocharger out of operation / 9.2 Taking defective tur-
bochargers out of operation
© Copyright 2018 ABB. All rights reserved. HZTL4036_EN Revision N November 2018
Product B
1
[Nm] B
2
[Nm] B
3
[Nm]
A265-L M8
25
M12
75
M8
25
A270-L M10
45
M12
75
M8
25
A275-L M10
45
M12
75
M8
25
A280-L M12
75
M12
75
M8
25
Table 47: Tightening torque B
1
, B
2
, B
3
u
Dismantle the filter silencer
(
Dismantling the filter silencer
→
58 ).
1. If present: Unscrew and remove the connecting screw at the centre of the spinner nose
cone (25012). Dismantle spinner nose cone with press-off screw (90924).
2. Loosen retaining nuts (N) and remove screws (B
1
).
3. Loosen screws (B
2
) and remove with washers.
4. Align the locking device to a fin of the wall insert (77000) and align the hole circle to the
drill holes in the compressor wheel (25000).
5. Secure the locking device to the compressor wheel with the maximum possible number
of screws (B
1
). Observe the tightening torque. Assembly with at least 6 screws is mandat-
ory. The maximum possible number of screws to be fitted (B
1
) varies, as the threads in
the compressor wheel are partially occupied by set screws.
6. Align the bracket (94020) to a fin of the wall insert and fit screws (B
2
) with washers and
screw (B
3
). Observe the tightening torque.
9.2.4 Engines with bypass around the turbocharger
The chapter only applies for engines with one turbocharger and for systems on which the
connections for a bypass have been prepared and the necessary pipe connections have been
provided.
u
Close the lubricating oil supply to the turbocharger.
u
Open the bypass around the turbocharger.
u
Observe specifications from enginebuilder.
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