8. Make sure that the air cleaner is seated properly on the inlet housing and the seal is installed correctly. Tighten the wing bolt until the air cleaner is securely mounted. 4. Clean and inspect the gaskets and sealing surfaces to ensure an air tight seal. 5. Reinstall the baffle in the oil cup and refill to the proper oil level with the same grade of oil as used in the engine. Service the heavy-duty oil bath air cleaner (Fig. 7) as follows: 1. Loosen the wing nuts and detach the lower portion of the air cleaner assembly. 6. Inspect the lower portion of the air cleaner body and center tube each time the oil cup is serviced.
If there are any indications of plugging, the body assembly should be removed and cleaned by soaking and then flushing with clean fuel oil. Allow the unit to drain thoroughly. 2. Lift out the removable element assembly and hold it up to a light. An even, bright pattern of light through the wire element indicates it is clean. Even a partially plugged element must be cleaned with a suitable solvent or fuel oil and blown out with compressed air to remove any dirt, lint or chaff. 7. Place the removable element in the body assembly. Install the body if it was removed from the engine for servicing. 3.
Pour out the oil, separate the inner cup or baffle from the outer cup, remove the sludge and wipe the baffle and outer cup clean. 8. Install the outer cup and baffle assembly. Be sure the cup is tightly secured to the assembly body. HEAVY-DUTK DRY-TYPE AIR CLEANER 1. Loosen the wing bolt and remove the air cleaner assembly from the air inlet housing. The dry-type air cleaner consists of a removable cover attached to the air cleaner body which contains a replaceable paper filter cartridge and a dust cup. Air entering the air cleaner is given a centrifugal pre- cleaning by a turbine-type vane assembly.
Air rotates at high speed around the filter element throwing the dust to the outside where it flows down the wall of the body and is ejected into a dust cup. The dust cup is baffled to prevent the re-entry of the dust. The pre- cleaned air passes through the paper filter and enters the engine. 2. Detach the cover and wing bolt and remove the element. Then empty and wipe the dust cup clean. 3. Clean the filter element as follows: If the element is dry and dusty, use compressed air. The air should be blown through the element opposite to the normal direction of air flow. 4.
If the element is oily or has soot deposits, use a water hose (less than 40 psi or 276 kPa) and wash with warm water and a non-sudsing detergent. Dry the element thoroughly. Some air cleaners are equipped with an indicator which will aid in determining the servicing requirements. 5. Reassemble all of the air cleaner parts, place the assembly on the air inlet housing and secure it with the wing bolts. Service the dry-type air cleaner as follows: TWO-STAGE DRY-TYPE AQR CLEANER The dry-type air cleaner illustrated in Fig. 8 is designed to provide highly efficient air filtration under all operating conditions and is not affected by engine speed.
The cleaner assembly consists of a centrifugal air cleaner in series with a replaceable impregnated paper filter element. The dust collected in the centrifugal cleaner is exhausted by connecting the dust bin to an exhaust gas aspirator. The centrifugal cleaner and replaceable filter element are held together in a steel housing. Positive sealing between the two elements and the housing is provided by rubber gaskets. The steel housing incorporates filter fasteners, mounting flanges and an outlet for the filtered air. Operation The deflector vanes (Fig. 9) impart a swirling motion to the air entering the air cleaner and centrifuge the dust particles against the walls of the tubes.
The dust particles are then carried to the dust bin at the bottom of the cleaner by approximately 10% bleed-off air and are finally discharged into the atmosphere through an exhaust gas aspirator. The exhaust gas aspirator is connected into the exhaust system of the engine (Fig. 10). A flexible hose carries the dust particles from the cleaner dust bin to the aspirator where the waste energy of the exhaust gases draws the dust-laden bleed-off air out and discharges it Page 18 ,