Checking position of oil spray nozzles

Insert special tool 11 4 251 in screw connection of main bearing.

Check position of oil spray nozzle (2) according to position (1) on special tool 11 4 251.

If necessary, adjust and secure oil spray nozzle (2).

Fig 1: Checking Oil Spray Nozzle Position On Special Tool (11 4 251)

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Tightening torque 11 11 5AZ .

Remove bearing shells (2) and guide bearing shell (3).

Fig 2: Removing Bearing Shell

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Installation: 

Bearing shell (1) with lubricant groove must be fitted in crankcase.

Bearing shell (2) without lubricant groove must be fitted in bedplate.

Fig 3: Identifying Bearing Shell With/Without Lubricant Groove

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Surface (1) for identification on crankshaft web 1.

Seven-digit part number (2).

Main bearing classification  (3) for crankcase lower half (bedplate), code numbers 1 2 3, see table.

Code letter (4) as per table, main bearing.

B= build date 1 (B 1 2 3 -0.25 mm).

B= build date 2 (C 1 2 3 -0.50 mm).

Code letter (5) as per table, lift bearing.

B= construction stage 1 (-0.25 mm).

Fig 4: Identifying Seven Digit Code On Crankshaft Web Surface

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C = construction stage 2 (-0.50 mm)

Observe bearing classification  . See N52K-03B1S2 CRANKSHAFT AND BEARINGS ; N52K-03B1S1 CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS N52K/B30 ; CRANKSHAFT AND BEARINGS N52K/B25 ; CRANKSHAFT AND BEARINGS N52K/B30 or CRANKSHAFT AND BEARINGS N52K/B25 .

Main bearing classification (1) in crankcase, code letters A/B or C, see table.

Installation: 

When all the letters and number code have been determined, the bearing shell color must be allocated, see table.

Fig 5: Identifying Bearing Classification On Crankcase

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Installation: 

The letter/number combination produces a bearing shell pairing.

Identification by different colors.