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Doosan DE12T - Lubrication System

Doosan DE12T
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3.5. Lubrication System
The engine is equipped with force-feed lubrication.
The pressure is produced by a gear pump whose drive gear is in direct mesh with the crankshaft
gear at the front end of cylinder block.
The oil pump draws the oil from the oil sump and delivers it through the oil cooler and oil filter
to the main distributor gallery and from there to the main bearings, big-end bearings and
camshaft bearings as well as to the small-end bearings and the rocker arms.
The injection pump and the turbocharger are also connected to the engine lubricating system.
The cylinder walls and timing gears are splash lubricated.
Each cylinder has an oil jet provided for cooling the underside of the pistons.
The lube oil is cleaned in a full-flow oil filter.
Rock arm
Cam shaft
Con-rod bearing
Main bearing
Main gallery
Relief valve
4.4 bar
Valve : 5 bar
Cooler
Piston
Oil pump
Valve : 10 bar
Oil jet valve
1.3 bar
W/P
BRG.
I/P
T/C
Filter
Valve : 3 bar
ED5OM001

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