ABB A155-M57 Operation Manual page 50

Operation Manual / 4 Product description / A150-M.. - A155-M..
2 Removing and Installing
2.3.3 Fastening the turbocharger with a clamping nut
Preparations for tightening the clamping nut
Do not clean pressure screws (04)
The pressure screws are equipped with a permanent sliding layer that must
not be removed.
CAUTION
Do neither clean nor lubricate the pressure screws. In case of non-
compliance, it cannot be ensured that the necessary tension force is
reached.
Do not clean pressure screws.

Do not lubricate pressure screws.

In order to correctly fit the clamping nuts, the pressure screws (04) must not protrude from the
clamping nuts (03) in the direction of the thrust washer (02).
Make sure the pressure screws do not protrude in the direction of the thrust washer.

Figure 12: Preparing the clamping nut for the tightening procedure
1. Clean the thread of the bolt (01) and the contact surface.
2. Lightly oil the bolt thread.
3. Position the thrust washer (02) in place.
4. Tighten clamping nut (03) by hand.
5. Unscrew clamping nut (03) by ¼ of a turn (90°).
The distance between the thrust washer and the clamping nut is now about 1 mm.
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Revision F January 2017