- Incorrect brake adjustment
- Matching tractor&trailer brakes to eliminate jack knifing
- Air system timing v's brake force analysis
- Faulty slack adjuster/s - Cams
- Glazed or contaminated linings oil, grease or brake fluid
- Seized hydraulic wheel cylinders
- Badly worn S cam shaft bushings
- Faulty air compressor
- Worn or faulty brake pedal
- Faulty Treddle Valve
- Pedal effort to apply brakes
- Pedal to brake timing
- Air pressure to brake timing
- Measure braking to each individual wheel
- Hot spots on the drum
- Drum out of round
- Sticky air valves
- Improper crack values
- Blocked air lines
- Improper brake balance between axles
- Leaking oil seals & worn & damaged components
- Damaged air/hydraulic line&hoses
- Broken spring coils in park brake chamber
- Worn brake linings or drums
- Incorrect brake lining to drum radius
- Problems due to driving habits
- Stopping Distances
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- Worn Tied Rod Ends and Drag Links
- Worn King Pins
- Worn Spring Pins, Shackles & Hangers
- Worn Bushings
- Shock Absorbers
- Loose U Bolts
- Air Bag Integrity
- Weigh each wheel to detectv bent frame
- Weigh vehicle
- Weigh each axle load to check balance
- Loose Bolts
- Cracks in chassis and cross members
- Loose or worn engine&transmission mounts
- Loose or worn cab, sleeper mounts & bushings
- Loose wheel bearings
- High rolling resistance
- Problems in drive line detected through wheels resistance to turn
- Worn yokes, center bearings
- Loose or worn exhaust
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