ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 005-228   Fuel Pump Actuator Housing

WARNING  The fuel pump, high-pressure fuel lines, and fuel rail contain very high-pressure fuel. Do not loosen any fittings while the engine is running. Wait at least 10 minutes after shutting down the engine before loosening any fittings in the high-pressure fuel system to allow pressure to decrease to a lower level.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Disconnect the batteries. Refer to Procedure 013-009 in Section 13.
• Disconnect the wire harness from the fuel pump actuator.
• Disconnect the fuel supply line from the fuel pump actuator housing. Refer to Procedure 006-024 in Section 6.
• Disconnect the high-pressure fuel line from the fuel pump actuator housing. Refer to Procedure 006-051 in Section 6.
• Disconnect the fuel drain from the fuel pump actuator housing. Refer to Procedure 006-013 in Section 6.
• Remove the upper support bracket from the fuel pump actuator bracket. Refer to Procedure 005-016 in Section 5.

Remove the three bolts that hold the fuel pump actuator housing to the high-pressure fuel pump head.

Remove the fuel pump actuator housing and the gasket.

Inspect the fuel pump actuator housing gasket. Do not reuse the gasket if the material is cracked, torn, or otherwise damaged.

Be sure that the mounting surfaces of the high-pressure pump head and the fuel control valve adapter block are clean. Use contact cleaner to clean these surfaces.

Insert the three mounting bolts through the fuel pump actuator housing.

Install the gasket over the bolts. The gasket must be installed dry.

Install the actuator housing.

Tighten the mounting bolts.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Install the upper support bracket. Refer to Procedure 005-016 in Section 5.
• Connect the high-pressure fuel line to the fuel pump. Refer to Procedure 006-051 in Section 6.
• Connect the fuel supply line to the fuel pump. Refer to Procedure 006-024 in Section 6.
• Connect the fuel drain line to the fuel pump. Refer to Procedure 006-013 in Section 6.
• Connect the wire harness to the fuel pump actuator.
• Connect the batteries. Refer to Procedure 013-009 in Section 13.
• Operate the engine and check for leaks.