OPERATION 3.2 CONSTRUCTION OF THE SHOVEL Engine Oil Management System The engine oil management system of each engine combines the automatic engine oil supply system Reserve and the oil burning system Centinel in connection with the Eliminator oil filtration system. REMARK On machines destined for Australia, the Centinel system is made inoperative for legal reasons. The oil change intervals are reduced accordingly, see maintenance section for more informa- tion. Reserve System Oil Flow Schematic, illust. Z26340. Front engine -2- shown. Rear engine -1- is connected to the reserve tank in the LH side member of the main frame (1) Reserve oil tank.
The reserve oil tank for the rear engine -1- is an inte- grated part of the LH main frame side member. The reserve oil tank for the front engine -2- is an integrated part of the RH main frame side member. (2) Oil level sight gauge (3) Suction line from reserve tank (4) Oil filters for the engine oil reserve system (5) Suction line to pumping unit (6) Pumping unit, located at the power frame just below the eliminator filter (15). The pump unit works automatically as soon as the engine speed is above 300 RPM. The pump unit consists of a pumping element for feeding oil from tank (1) into the engine oil pan.
The second pumping element with- draws oil from the engine oil pan and feeds it back into the reserve tank when the oil level in the oil pan exceeds the maximum running oil level. This function maintains a favorable engine oil level. The combined opera- tion of the pumping elements provides constant circulation of oil between the engine sump and reserve tank (1) increasing the total volume of work- ing oil. This maintains the oil quality over longer periods. Oil drawn off by the Centinel burn system is also replaced through the supply system Reserve.
(7) Supply line from pumping unit to crankcase (8) Withdrawal oil line from engine oil pan to pump (9) Oil feed-back line to reserve tank (10) Ventilation line for reserve tank (11) Drain plug (12) Connector for refilling line from swing down service arm (13) Power frame (14) RH side member of main frame (15) Eliminator filter (16) Centrifuge 67