AGCO Power 49 - Crankshaft and Connecting Rod Maintenance

3.5 Crankshaft
3.5.1 Removing crankshaft
Procedure
1.
Remove the oil sump.
2.
Disconnect the balancing unit lubricating oil pipe from the cylinder block.
3.
Unscrew the balancing unit fixing bolts.
4.
44-49 engines: Remove the balancing unit and the lubricating oil pipe.
5.
Unscrew the lubricating oil pump pressure pipe fixing screws from the cylinder block.
6.
Remove the oil pump and the suction and pressure pipes.
7.
Remove the flywheel and the flywheel housing.
8.
Remove the belt pulley and the hub from the crankshaft front end.
9.
Remove the timing gear housing.
10.
Remove the connecting rod bearing caps and push the connecting rods out of the way of the
crankshaft.
11.
Remove the main bearing caps and lift out the crankshaft.
3.5.2 Checking crankshaft
NOTE: When grinding, note that the journal edges must remain round.
NOTE: Because of the automatic assembly, the thrust bearings are integrated into the main bearings.
Undersize spare part main bearings and thrust bearings are always supplied separately.
Procedure
1.
Clean the crankshaft.
Do not forget the oilways.
2.
Measure the journal wear in several points.
Out-of-round, taper or other wear must not
be over 0.03 mm.
3.
Refit the bearing caps with new bearing
shells and tighten them to the correct torque.
Fig. 37
3. Maintenance
3-26 4th Generation Engines
8370 79492