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N14 Base Engine Troubleshooting and Repair Manual – 010-031   Air Intake Restriction

Table of Contents

Measure

Measure

 TOC

Install a vacuum gauge or water manometer in the intake air piping.

NOTE: The gauge adapter

must
be installed at a 90 degree angle to the air flow in a straight section of pipe, 127 mm [5.0 inch], before the turbocharger compressor inlet.

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Operate the engine at full throttle and maximum horsepower RPM with maximum load.

Record the reading on the gauge or manometer.

NOTE: Restriction

must not
exceed 635 mm H

2
0 [25.0 inch H

2
0].

  
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If the restriction exceeds specifications, do the following:

  • Replace or clean the air filter element. Refer to the equipment manufacturer’s instructions.

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  • Visually inspect the intake air piping for damage. Check for collapsed and dented piping or elbows, and loose connections. Refer to the equipment manufacturer’s repair instructions.

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Remove the test equipment.

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Last Modified:  12-May-2003
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