Man D 2842 LE 620 Repair Manual page 19

Pressurising an engine affords the following advantages:
D All engine parts are lubricated before engine startup; a lubricating film can be built up inside the bear-
ings as early as after the first few rotations of the crankshaft, thereby preventing damage to the bearing
races
D Any loss of oil, be it the result of excessively large bearing play or leaks from the crankcase or from
crankcase bores which may not be plugged, can be detected immediately. For this purpose, mount the
engine on an assembly dolly, remove the oil pan and install a suitable oil collector under the crankcase
in such a way that the bearings are visible
Performance of pressurisation:
At least 30% of the total oil quantity is forced from the pressurisation container into the engine oil circuit.
The operating pressure serves as the yardstick for the pressure to be forced in and must not be exceeded.
The pressurisation container is connected up to the engine oil circuit at the oil filter (screw plug).
Commissioning after engine overhaul
17