OM3037 Operation - Section 3 Operating Instructions Page 3-11 Reserve Engine Oil System (Optional) NOTE: Do not use the oil in the reserve tank to fill the engine sump. Both must be at proper level before starting engine. The reserve oil tank for the engine is designed to add more oil capacity to the engine and to make less fre- quent servicing of the engine oil. The circulation of oil between the engine sump and reserve tank increases the total volume of working oil. This dilutes the effects of contamination and loss of additives and maintains the oil quality over longer periods.
A filter in the supply circuit protects the pumping unit and prevents transfer of contaminants to the engine sump which might enter the tank during servicing. It also gives an added level of oil cleanup. The engine oil level should be checked with the engine dipstick at every shift change. If the oil level in the engine is incorrect, check for proper operation of the reserve engine oil system. The oil level in the reserve tank must also be checked at every shift change. Oil must be visible in the middle sight gauge (12). If not, add oil to the reserve tank by using the quick fill system utilizing the tank fill pump (3).
For filling instructions, refer to the "Lubrication and Ser- vice" section. Operation Engine oil is circulated between the engine sump and the reserve tank by two electrically driven pumps within a single pumping unit (11). The pump unit is mounted on the side of the reserve tank. The pump unit is equipped with an LED monitor light on one side. Pump 1 (in the pump unit) draws oil from the engine sump at a preset control point (determined by the height of the suction tube). Oil above this point is with- drawn and transferred to the reserve tank (9). This low- ers the level in the engine sump until air is drawn.
Air reaching the pumping unit activates Pump 2 (in the pump unit) which returns oil from the reserve tank and raises the engine sump level until air is no longer drawn by Pump 1. Pump 2 then turns "Off". The run- ning level is continuously adjusted at the control point by alternation between withdrawal and return of oil at the sump. LED Monitor Light Steady - Pump 1 is withdrawing oil from the engine sump and bringing down the oil level. Regular Pulsing - Pump 2 is returning oil to the engine sump and raising the oil level. Irregular Pulsing - Oil is on the correct running level. 1. Oil Suction 2. Oil Tank Fill 3. Fill Valve 4. Engine Fill Line 5. Oil Level Sensor 6. Air Valve 7.
Tank Fill Line 8. Fill Cap 9. Reserve Oil Tank 10. Engine Fill Line 11. Pump Unit 12. Sight Gauge 13. Tank Return Line 14. Oil Filter Changing Oil Drain both the engine sump and the reserve tank. Refill both engine and reserve tank with new oil to proper lev- els. Change engine and reserve tank filters as required. Start engine and check for proper operation.