DETROIT DIESEL Engine Systems OIL BATH TYPE AIR CLEANERS Several types of air cleaners are available for use with the V-71 engines. The light duty oil bath air cleaner (Fig. 6) is used with some marine models and a light or heavy-duty oil bath air cleaner (Fig. 7) is available for industrial engines. Some engines are equipped with a heavy-duty dry type air cleaner or a two-stage dry type air cleaner (Fig. 8). The air cleaners are designed for fast, easy disassembly to facilitate efficient servicing. Maximum protection of the engine against dust and other forms of air contamination is possible if the air cleaner is serviced at regular intervals.
Service the light-duty oil bath air cleaner (Fig. 6) as follows: 1. Loosen the wing bolt and remove the air cleaner assembly from the air inlet housing. The cleaner may then be separated into two sections; the upper section or body assembly contains the filter element and the lower section consists of the oil cup, removable inner cup or baffle, and the center tube. 2. Soak the body assembly and element in fuel oil to loosen the dirt; then flush the element with clean fuel oil and allow it to drain thoroughly. The oil bath air cleaner consists of the body and fixed filter assembly which filters the air and condenses the oil from the air stream so that only dry air enters the engine.
The condensed oil is returned to the cup where the dirt settles out of the oil and the oil is recirculated. A removable element assembly incorporated in the heavy-duty oil bath air cleaners removes a major part of the dust from the air stream thereby decreasing the dust load to the fixed element. An inner cup, which can be removed from the outer oil cup, acts as a baffle in directing the oil laden air to the element and also controls the amount of oil in circulation and meters the oil to the element. The oil cup supports the inner cup, and is a reservoir for oil and a settling chamber for dirt. 3.
Pour out the oil, separate the inner cup or baffle from the oil cup, remove the sludge and wipe the baffle and outer cup clean. 4. Push a lint-free cloth through the center tube to remove dirt or oil. 5. Clean and check all of the gaskets and sealing surfaces to ensure air tight seals. 6. Refill the oil cup to the oil level mark only, install the baffle and reassemble the air cleaner. 7. Check the air inlet housing before installing the air cleaner assembly on the engine. The inlet will be dirty if air cleaner servicing has been neglected or if dust laden air has been leaking past the air cleaner to the air inlet housing seals. Fig. 6 - Typical Light-Duty Air Cleaner Fig.
7 - Heavy-Duty Oil Bath Air Cleaner Page 17