ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 010-019   Air Crossover

NOTE: Brush away all loose dirt from around the area of the air handling connections to avoid contamination of the interior of the engine.

Loosen the hose clamps and position the crossover tube so it can be removed.

Remove the crossover tube.

Install the protective caps from the Air Handling Clean Care Kit, Part Number 4919508, on all open connection points, including inlet to the engine, charge-air cooler, and ends of the crossover tube.

NOTE: The graphics used in this procedure are of the QSL9 engine; however, the procedure is the same for the QSC8.3 engine.

Remove the flange clamp from the turbocharger outlet.

Loosen the hose clamps and pull the air crossover from the aftercooler housing air inlet.

Discard the turbocharger flange o-ring.

Check the crossover tube for cracks, holes, and worn sections.

Also check for poor sealing between the hose and tube.

Inspect the clamps for wear.

Replace damaged components with a new hose and clamps if necessary.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Some solvents are flammable and toxic. Read the manufacturer’s instructions before using.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Use solvent to clean the air crossover tube.

Dry with compressed air.

Inspect the tube for damage to the sealing flange or cracks in the tube.

Replace the tube if excessive damage is found.

Replace any hose that has extruded or cracked.

Replace any cracked or damaged clamps.

Remove all protective caps from the components.

Install the crossover tube and clamps in the reverse order of removal.

Tighten the clamps. Refer to the OEM service manual for the torque specification.

Install a new o-ring seal on the turbocharger flange.

Install the hose and clamps.

Install the air crossover tube and the flange clamp.

Tighten the flange clamp.

Tighten the hose clamps.