Tightening procedure for crankshaft bearing caps

AR03.20-P-4351-02OLC

Tightening procedure for crankshaft bearing caps

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

Engine

654

 Crankshaft bearing cap

Number

Designation

Engine 654

BA03.20-P-1001-01K

Bolt, crankshaft bearing cap

Stage 1

Nm

10

Stage 2

Nm

45

Stage 3

°

180

1

The screws/bolts of the crankshaft bearing caps (L1 to L5) must be tightened individually in numerical sequence (1 to 10).

 Do not use an impact wrench or compressed air tool to screw in the crankshaft bearing cap bolts.
The threaded holes are damaged otherwise.

 If no angle tightener is available at the final tightening stage, the screw/bolts can be turned further using a socket wrench and locking handle all in a single operation. Do not use a bending rod torque wrench for tightening in order to avoid any angular errors.

2

Oil new crankshaft bearing cap bolts at thread and bolt head contact surface.

3

Tighten crankshaft bearing cap bolts to stage 1 in numerical sequence (1 to 10)  .

4

Tighten crankshaft bearing cap bolts to stage 2 in numerical sequence (1 to 10)  .

5

Tighten crankshaft bearing cap bolts to stage 3 in numerical sequence (1 to 10)  .