Problem |
Cause |
Correction |
|
Worn out linings |
Replace lining |
Low or soft pedal |
Excessive clearance between lining and drum |
Adjust clearance ie Slackadjuster |
|
Low air pressure in system |
Check lines , valves |
|
Defective drums,cracked,oval,worn,grooved |
Replace drums |
Erratic braking |
Damaged or weak return springs |
Replace springs |
|
Lining contaminated, grease,paint,oil |
Replace linings clean drum |
|
Brake presure high |
Check air system |
|
lining in constant contact with drum |
Adjust clearance ie Slackadjuster |
|
Poor Quality Drum or worn drum |
Replace drums |
|
Slackadjusters worn or out of adjustment |
Adjust slacks or replace |
Excessive lining wear |
Overloaded Vehicle |
Check weight loads |
|
Excessive braking due to late application |
Driver training |
|
Standard thickness lining in worn oversize drum |
Change drum or Supply oversize lining |
|
Brake system low air |
Check Lines , valves ETC |
Slow brake application |
Excessive clearance between lining and drum |
Replace worn Lining,drum Check Slackadjusters |
|
Excessive pedal travel |
Replace or repair |
|
Weak or broken return springs |
Replace springs |
Locking brakes |
Sticky or faulty valves |
Repair or replace |
|
Slackadjusters over adjusting |
Adjust slacks, repair or replace |
|
Drum Diameter wrong,to small |
Machine or replace drum |
|
Different quality lining,Friction used on axle |
Use same lining material on left and right axel |
Brake pulling |
Weak or broken return springs |
Replace springs |
|
Slackadjusters worn or out of adjustment |
Adjust slacks or replace |
|
Faulty valve |
Repair or replace |
|
Loose fitted linings |
All rivets and bolts must be fastened correctly |
Noise |
Cracked lining |
Replace lining |
|
Hard spots in drum |
Machine or replace drum |
|
Lining light constant contact with drum causing glazing |
Check and repair brake system,replace lining |
