OM3050 7/09 Operating Instructions - Section 30 Page 30-27 RESERVE ENGINE OIL SYSTEM The reserve oil tank for the engine is designed to add more oil capacity to the engine and to make less frequent 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. 5. The oil level in the reserve tank must also be checked at every shift change. Oil must be visible in lower sight gauge (12). If not, add oil to the reserve tank by using the quick fill system utilizing tank fill valve (3).
For filling instructions, refer to Section 40, Lubrication and Service. NOTE: Oil must always be visible in the lower sight gauge (12). If the tank is equipped with three sight gauges, oil must always be visible in the middle sight gauge. Operation Engine oil is circulated between the engine sump and the reserve tank by two electrically driven pumps within a single pumping unit (11, Figure 30-7). The pump unit is mounted on the side of the reserve tank, and 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Oil above this point is withdrawn and transferred to reserve tank (9). This lowers 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 running 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. FIGURE 30-7.
RESERVE ENGINE OIL SYSTEM 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 • Irregular Pulsing - Oil is on the correct running level. Changing Oil 1. Drain both the engine sump and the reserve tank. Refill both engine and reserve tank with new oil to proper levels. 2. Change engine filters as required. 3. Start engine and check for proper operation. NOTE: Do not use the oil in the reserve tank to fill the engine sump. Both must be at proper level before starting engine. 4.
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.