Workshop Manual

41.3 INSPECTION OF THE AIR COMPRESSOR

Troubleshooting information for the Bendix® air compressor can be found on the Bendix web site

at http:\\www.bendix.com or call the Bendix Technical Assistance Center at 1-800-AIR-BRAKE,

(1-800-247-2725).

Check as follows:

1. Check for oil present in the air dryer or air tanks.

[a] If no oil is present, check for a worn or damaged valve guide/seal or cylinder kit.

Refer to section 14.13.

[b] If oil is present, go to step 2.

2. Perform a crankcase pressure t est and record the test results using t he following test

procedure, refer to section .

Crankcase pressure — Full load, maximum KPa (in. H

O) operating l imits @ Rated speed = 1.25 KPa (5.0 in.

O column)

3. Disconnect the air outlet line (2) from the air compressor.

4. Repeat the ﬁrst step and record the test results.

5. Compare the results of test one with test two.

[a] If the engine crankcase pressure remained the same, check for a defective

turbocharger. Refer to section .

[b] If the engine crankcase pressure decreased, replace the air compressor.

Refer to section 41.2.

All information subject to change without notice.