C9.3 Engines for Caterpillar Built Machines Inlet Air Is Restricted Caterpillar

Inlet Air Is Restricted

C9.3 Engines for Caterpillar Built Machines [KENR5393]

C9.3 Engines for Caterpillar Built Machines Engine Stalls at Low RPM

C9.3 Engines for Caterpillar Built Machines Oil Consumption Is Excessive

AIR INLET AND EXHAUST SYSTEM

INLET GP-AIR

C9.3 Engines for Caterpillar Built Machines Inlet Air Is Restricted

1.1. Probable Causes

2.1. Recommended Actions

Use this procedure in order to troubleshoot a high differential pressure for the air inlet system. Use this procedure if one of the following event codes are active. Refer to Troubleshooting, "Event Codes" for information about event codes. Access the engine monitoring system on AVSpare Electronic Technician (ET) in order to view the current trip points for these codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".

Note: Some of the following codes may not be applicable for certain applications.

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Table 1
Event Codes for a high differential pressure for the air inlet system
Code	Description	System Response
E583(1)	High Air Inlet #1 Differential Pressure	The air filter differential pressure is above the trip point pressure for the delay time. The code is logged.
E583(2)	High Air Inlet #1 Differential Pressure	The air filter differential pressure is above the trip point pressure for the delay time. The code is logged. The engine power is derated.

Probable Causes

Air filter element
Air inlet piping
Atmospheric pressure sensor, turbocharger compressor inlet pressure sensors, and/or sensor circuits

Recommended Actions

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Table 2
Troubleshooting Test Steps	Values	Results
1. Air Filter Element A. Check the air intake system for plugged air filters or for damaged air filters. B. If the engine is equipped with an air intake precleaner, verify the proper operation of the air intake precleaner.	Air Filter Element	Result: The air filter element is damaged. Repair: Replace the air filter element. Result: The air filter element is not damaged. Proceed to Test Step 2.
2. Air Inlet Piping A. Check the air inlet piping for damage or restrictions.	Air Inlet Piping	Result: The air inlet piping is damaged or restricted. Repair: Repair or replace the air inlet piping. Result: The air inlet piping is not damaged or restricted. Proceed to Test Step 3.
3. Atmospheric Pressure Sensor, Turbocharger Compressor Inlet Pressure Sensors, and/or Sensor Circuits A. Use Cat ET to compare the status of the following parameters while the engine is off: • Atmospheric Pressure • Turbocharger #1 Compressor Inlet Pressure (absolute) Note: The status for air filter restriction is a calculated value. Before Cat ET reports the status parameters for air filter restriction, the engine must be running for 3 minutes. Cat ET will report "Conditions Not Met" for these parameters prior to this delay time. B. Cat ET will report the status for "Atmospheric Pressure" as the barometric pressure that is for the surrounding area. While the engine is off, the readings for the turbocharger compressor inlet pressure sensor will be approximately the same value that is reported by the atmospheric pressure sensor. If the readings do not agree, troubleshoot the sensor circuits for the suspect sensor. Refer to Troubleshooting, "Sensor Signal (Analog, Active) - Test".	Sensors	Result: The sensors are NOT OK. Repair: Repair or replace the faulty sensors. Result: The sensors are OK. STOP