AR03.20-P-4351-02VA Tightening Procedure For Crankshaft Bearing Caps

AR03.20-P-4351-02VA Tightening procedure for crankshaft bearing caps

Crankshaft bearing cap:

Tightening sequence for the crankshaft bearing cap and the crankshaft fitted bearing cap
Tighten the crankshaft bearing cap (2, 3, 4) and the crankshaft fitted bearing cap (1) individually in the numerical sequence. The arrow identifies direction of travel.

Tightening sequence for bolts for the crankshaft bearing cap and the crankshaft fitted bearing cap
1 Lubricate bolts for bearing cap at thread and bolt head contact surfaces.
2 Tighten bolts for bearing cap in the specified sequence.
If no torquing angle wrench is available for the final tightening, the bearing cap bolts can be torqued further by the specified angle in a single operation using a wrench and locking handle. Do not use a flexi-rod torque wrench for tightening in order to avoid any angle errors.

Crankshaft bearing cap:

3 Tighten the screws:
^ Tighten bolt 1 (M10) to stage 1.
^ Tighten bolt 2 (M10) to stage 1.
^ Tighten bolt 3 (M8) to stage 1.
^ Tighten bolt 4 (M8) to stage 1.
^ Tighten side bolt 5 (final tightening).
^ Tighten side bolt 6 (final tightening).
^ Tighten bolt 1 (M10) to stage 2.
^ Tighten bolt 2 (M10) to stage 2.
^ Tighten bolt 3 (M8) with the stage 2 tightening angle (final tightening).
^ Tighten bolt 4 (M8) with the stage 2 tightening angle (final tightening).
^ Tighten bolt 1 (M10) with the stage 3 tightening angle (final tightening).
^ Tighten bolt 2 (M10) with the stage 3 tightening angle (final tightening).