ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 010-013   Air Cleaner Assembly (Engine-Mounted)

Some marine engines are equipped with a factory installed closed crankcase breather system which is connected to the engine intake air cleaner. Aftermarket
(non-factory installed) closed crankcase breather systems can not
be installed on Cummins marine engines. Installing such non-factory devices will void the warranty.

The closed crankcase system has three major parts.

1. The air cleaner assembly; this filters the incoming air and a oil blow-by filter element called a coalescing filter.
2. Vacuum brake assembly; this keeps the engine from drawing oil directly into the turbocharger if the air cleaner is plugged.
3. Closed crankcase drain plumbing; this includes the drain hoses and check valve. The check valve prevents crankcase pressure from flowing backwards in the air cleaner.

Check the restriction gauge on the air filter assembly. If the gauge is red, the air filter element must be cleaned or replaced.

CAUTION  Use caution when disconnecting or removing oil lines, or replacing filters that oil is not drained into the bilge area. Do not drop or throw filter elements into the bilge area. The oil and filters must be discarded in accordance with local environmental regulations.

Release the clamp and remove the air cleaner element.

Remove the turbocharger silencer cone from inside of the filter element.

NOTE: It is possible a filter which is damaged or clogged with soot due to an exhaust leak will not be able to be cleaned to maximum efficiency. Replacement of the element will be necessary.

Tap the filter element to dislodge any large embedded particles or dirt.

Gently brush the filter element with a soft bristle brush.

CAUTION  To avoid damage to the components, do not use gasoline, high-pressure water or air, caustic cleaning solutions, or parts-cleaning solvents to clean the air filter.

CAUTION  To avoid damage to the components, do not use compressed air, an open flame or heat dryers to dry the air filter.

NOTE: Always flush from the clean side to the dirty side. This will remove the particles and dirt, and not drive it into the air filter.

Rinse the air filter element with low pressure water. Tap water is okay.

After rinsing the air filter, shake off all the excess water and let the filter element air dry.

NOTE: Do not use automatic transmission fluid, motor oil, diesel fuel, WD-40® lubricant, or any other light weight oil. Use approved filter oil.

After cleaning the air filter, always re-oil the filter element with oil before using. The effectiveness of the air filter is greatly reduced if it is used without oiling. Sparingly squeeze small amounts of oil out of a bottle across the top of each pleat.

Let the oil wick into the filter element for twenty minutes. Then re-oil any dry area that are showing.

Install the turbocharger silencer cone.

Install the o-ring around the outside of the filter base.

Install the filter onto the engine and secure with the clamp.