ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 006-056   Fuel Pump Air Bleed Line

WARNING  When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. Hot steam can cause serious personal injury.

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

CAUTION  Do not use the air bleed line as a handle or step. Doing this may result in cracks or damaged air bleed line that will cause fuel leaks. Make sure that steam does not spray directly on the electrical connections on the top of the accumulator block or fault codes will possibly occur.

Thoroughly steam-clean the entire fuel pump.

Dry the fuel pump with compressed air.

WARNING  To reduce the possibility of an air bleed line leak due to a broken air bleed line, use two wrenches during removal and installation. Failure to do so may result in a cracked fuel line. In certain applications, with the fuel tank above the head of the engine, this will result in fuel draining from the fuel tank.

NOTE: There are three styles of air bleed lines. Identify your style and use the appropriate procedures that follow.

Style One (1):

Remove the banjo capscrew at the injection control valve drain fitting of the fuel pump. Use two wrenches to prevent the line from being bent.

Style Two (2):

Remove the banjo capscrew at the injection control valve drain fitting of the fuel pump. Remove the hollow banjo fitting holding the air bleed line. Use two wrenches to prevent the line from being bent.

Remove the banjo capscrew at the air bleed fitting on top of the fuel pump. It is located on the accumulator module next to the two pumping control valves.

Use two wrenches to prevent the air bleed fitting from turning.

Remove the banjo bolt from the injection control valve drain fitting and the distributor plug.

Remove the banjo capscrew at the air bleed fitting on top of the fuel pump. It is located on the accumulator module next to the two pumping control valves.

Use two wrenches to prevent the air bleed fitting from turning.

Inspect the lines for pinches, bends, or damaged connectors.

WARNING  To reduce the possibility of an air bleed line leak due to a broken air bleed line, use two wrenches during removal and installation. Failure to do so may result in a cracked fuel line. In certain applications, with the fuel tank above the head of the engine, this will result in fuel draining from the fuel tank.

Install the banjo capscrew at the air bleed fitting on top of the fuel pump. Use two wrenches to prevent the line from being bent.

NOTE: Use new sealing washers.

Style One (1):

Install the banjo capscrew drain fitting on the fuel pump at the injection control valve. Use two wrenches to prevent the line from being bent.

NOTE: Use new sealing washers.

Style Two (2):

Install the hollow banjo fitting at the injection control valve drain fitting to secure the air bleed line. Use two wrenches to prevent the line from being bent.

Install banjo capscrew. Use two wrenches to prevent the line from being bent.

NOTE: Use new sealing washers.

Install the banjo capscrew at the air bleed fitting on top of the fuel pump. Use two wrenches to prevent the air bleed fitting from turning.

Install the banjo capscrew in the injection control valve drain fitting and the distributor plug.

NOTE: Use new sealing washers.

Operate the engine and check for leaks.