Bendix Commercial Vehicle Systems BA-921 COMPRESSOR_STD/CLOSED ROOM - Manual (Page 19)

A-1
Appendix A
Advanced Troubleshooting Guide for Air Brake Compressors
Air brake charging system:
Slow build (9.0) ..................................... A-9-10
Doesn’t build air (10.0) ............................. A-11
Air dryer:
Doesn’t purge (14.0) ................................ A-12
Safety valve releases air (12.0) ............... A-12
Compressor:
Constantly cycles (15.0) .......................... A-12
Leaks air (16.0) ........................................ A-13
Safety valve releases air (11.0) ............... A-11
Noisy (18.0) ............................................ A-13
Reservoir:
Safety valve releases air (13.0) ............... A-12
INDEX
Air Coolant
Engine
Oil
Compressor leaks coolant (17.0)....................A-13
Oil consumption (6.0) ......................................A-9
Oil Test Card results (1.0) .................................A-4
Oil is present:
On the outside of the compressor (2.0) ......A-5
At the air dryer purge/exhaust
or surrounding area (3.0) ........................A-5
In the supply reservoir (4.0) .................... A-6-8
At the valves (5.0) .......................................A-8
At air dryer cartridge (7.0) ...........................A-9
In the ping tank or compressor
discharge aftercooler (8.0) ......................A-9
Symptom Page Number
(1) Oil Leakage at Head Gasket .....A-14
(2) System Leakage .......................A-14
(3) Compressor Discharge and
Air Dryer Inlet Temperature ...........A-15
(4) Governor Malfunction ................A-14
(5) Governor Control Line ...............A-15
(6) Compressor Unloader ...............A-15
BASIC ™ Test Information ........ A-16-18
Test Procedures
Maintenance Schedule and
Usage Guidelines (Table A) ..... A-3
Symptom Page Number
Maintenance & Usage Guidelines
The guide consists of an introduction to air brake charging system components, a table
showing recommended vehicle maintenance schedules, and a troubleshooting symptom
and remedy section with tests to diagnose most charging system problems.