Posted on by

B5.9G, B5.9LPG – Troubleshooting and Repair Manual – Air Compressor Will Not Stop Pumping

Symptom Tree  t010

This is symptom tree t010
Cause Correction

Air system leaks

Block the vehicle wheels and check the air system for leaks with spring brakes applied and released. Check for leaks from the air compressor gaskets and the air system hoses, fittings, tanks, and valves. Refer to Procedure 012-019 and the OEM service manual.
 

Air governor is malfunctioning or not set correctly

Check the air governor for correct operation. Make sure the air governor is located less than 0.6 m [2 ft] from the air compressor. Refer to the Master Repair Manual, Holset® Air Compressors, Bulletin 3666121, and the OEM service manual.
 

Unloader valve is malfunctioning

Check the unloader valve and unloader body seal. Refer to the Master Repair Manual, Holset® Air Compressors, Bulletin 3666121.

 

Air governor signal line or actuator line is plugged

Inspect the signal line and actuator line. Refer to the OEM service manual.
 

Air system component is malfunctioning

Check the operation of check valves, alcohol evaporators, air dryers, and other OEM-installed air system components. Refer to the OEM service manual.
 
Last Modified:  05-Jan-2004
Avatar photo

Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.