ISM, ISMe, and QSM11 – 011-028   EGR Differential Pressure Sensor Adapter

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.
• Disconnect the EGR differential pressure sensor and exhaust pressure sensor from the engine wiring harness.
• Remove the EGR differential pressure sensor tubes. Refer to Procedure 011-026.
• Remove the exhaust pressure sensor tube. Refer to Procedure 011-027.
• Remove the EGR differential pressure sensor and the exhaust pressure sensor from the adapter. Refer to Procedure 019-371 and 019-377 in the Troubleshooting and Repair Manual, CM870 Electronic Control System, ISM Engines, Bulletin 4021381 or in the Troubleshooting and Repair Manual, CM871 and CM876 Electronic Control System, ISX and ISM Engines, Bulletin 4021560.

Remove the mounting capscrews.

Remove the EGR pressure sensor adapter.

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

Check the EGR pressure sensor adapter tube and exhaust pressure sensor tube holes for clogging.

If clogged, use compressed air to remove debris or soot buildup.

Clean the outside of the adapter with safety solvent.

Dry with compressed air.

Inspect the EGR pressure sensor adapter for cracks or fretting.

Replace the EGR pressure sensor adapter if cracks are found.

Start the tube nuts on all tubes before locating the sensor adapter.

Position the adapter onto the air intake manifold, as illustrated in the graphic.

Pre-start the mounting capscrews through the adapter into the air intake manifold.

Tighten the capscrews.

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 differential sensor tubes. Refer to Procedure 011-026.
• Install the exhaust pressure sensor tube. Refer to Procedure 011-027.
• Install the EGR differential pressure sensor and the exhaust pressure sensor from the adapter. Refer to Procedure 019-371 and 019-377 in the Troubleshooting and Repair Manual, CM870 Electronic Control System, ISM Engines, Bulletin 4021381 or in the Troubleshooting and Repair Manual, CM871 and CM876 Electronic Control System, ISX and ISM Engines, Bulletin 4021560.
• Connect the EGR differential pressure sensor and exhaust pressure sensor connectors to the wiring harness.
• Operate the engine and check for leaks.