Engine body - Service procedures

4

Fit the thrust washers for the middle main bearing (axial bearing). The washers can only be fitted in one position in the fitting socket.

8

Check that the ”Front” marking on the connecting rods faces forwards.

9

Fit the big end bearing caps according to the markings and torque-tighten the bolts.

Tightening torque: see Workshop Manual, Technical Data for each engine concerned.

10

Fit the oil strainer, delivery pipe and oil pan, see Lubrication system.

Guide for axial bearing

5

Fit the main bearing caps. The middle cap is provided with a recess, which is turned so that it comes over the guide pin. This ensures that the bearing cap is always placed in the correct position in its axial plane. Note the number of the main bearing cap, which indicates positioning.

6

Fit the main bearing screws when the threads have been oiled. Tightening torque: see Workshop Manual, Technical Data for each engine concerned.

7

Check the axial clearance of the crankshaft (see Workshop Manual, Technical Data for each engine concerned).

Main bearings, replacement

(Crankshaft not removed)

1

Drain the engine oil. Remove the oil pan.

2

Release the main bearing screws and remove the main bearing cap with bearing shell. The front main bearing cap can be removed together with the lubricating oil pump.

3

Release the injectors so that the engine is easier to rotate.

Turn the crankshaft until its oil hole is exposed. Insert a stud in the oil hole. The stud must be of such a dimension that it brings the upper bearing shell around, when the crankshaft is rotated, see fig.

NOTE! The engine is rotated in its normal direction of rotation when rolling out the bearing shell.

Rear crankshaft seal, replacement

Special tools: 6400, 6088, 2000, 885341

1

Remove the flywheel.

2

Wipe the shaft journal clean and examine for damage. If there is severe wear or excessive ovality the crankshaft must be ground. 6

Fit the new bearing shells in the same way as they were removed. The shaft is rotated counter-wise to the direction of rotation. Check that the pressed out lugs of the shells engage correctly. Fit the lower bearing shell and cap. Tighten the screws. See Workshop Manual, Technical Data for each engine concerned, for correct tightening torque.

7

Fit the oil pipes and oil pan; see Lubrication system.

Remove the crankshaft seal with tool 6400 and 885341. Be careful not to damage sealing surface.

Clean the mating surfaces between the crankshaft and flywheel carefully. Clean also the contact surface of the sealing ring in the casing.