2.3. Engine Timing Camshaft, oil pump and injection pump are driven by a gear train arranged at the front end. Injection pump gear (Z = 72) Camshaft gear (Z =72) Water pump gear (Z =29) Idle gear (Z = 52) Crankshaft gear (Z = 36) Oil pump idle gear (Z = 31) Oil pump drive gear (Z = 32) EB8O3002 2.4. Valves The overhead valves are actuated via chilled cast iron tappets , push rods and rocker arms from the camshaft. 2.5. Lubrication System The pressure is produced by a gear pump whose drive gear is in direct mesh with the crankshaft The engine is equipped with force-feed lubrication. 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. - 18 - TECHNICAL INFORMATION