Bendix Commercial Vehicle Systems BRAKE SYSTEM TROUBLESHOOTING GUIDE - Manual (Page 11)

9
BRAKE SYSTEMS DIAGNOSTIC GUIDE
POTENTIAL CONDITION/CAUSE ACTION (SERVICE MANUAL SECTION)
Inadequate air supply to chamber:
• Old or broken lines
Replace chamber air lines (3)
• Pinhole leaks in air chamber line Replace chamber air lines (3)
• Loose or damaged fittings Tighten or replace fittings (3)
• Air line inner lining separation Replace chamber air lines (3)
Separation:
• Plugged lines
Remove blockage
• Contamination Remove contamination
Valve problems:
• Worn valves
Repair or replace
• Internal component failures Repair or replace
• Seals/O-rings damaged Replace seals/O-rings
• External vents blocked Remove blockage
Governor failure:
• Incorrect set point
Correct set point
• Contamination Remove contamination
• Damaged valve Repair or replace
Compressor failure:
• Worn or leaking compressor
Repair or replace compressor
• Slipping/broken belts/drives Repair or replace belts or drives
Contamination:
• No air dryer
Install air dryer
• Faulty air dryer Repair or replace air dryer
• Dirty/damaged filter Replace air filter
• Desiccant debris Remove debris
• Incompatible oils Drain and refill oil
Leaking air tanks Repair or replace
Improperly set air chamber:
• Too much rod free-travel
Adjust brakes (2)
Slack adjuster improperly set:
• Incorrect installation of slack adjuster
Install slack adjuster properly (3,6)
• Incorrect in-service adjustment Adjust brakes using correct procedure (2,6)
• Incorrect setup of external reference control arms Perform correct setup procedure (3,6)
(Eaton-Haldex)
• Worn clevis pin Replace clevis pin (3,6)
LONG STOPPING DIST
ANCES