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Why must brake chambers of different sizes or slack adjusters of different lengths not be mixed carelessly on the same axle?
- A.Mixed parts make the air dryer work harder
- B.Mixed parts change the governor cut-out pressure
- C.Mixed parts only affect the color of the warning lamp
- D.Mismatched parts can create uneven braking force from side to side and cause pulling
Correct answer
D. Mismatched parts can create uneven braking force from side to side and cause pulling
Why
Braking force depends on chamber size and slack adjuster leverage together. If the two sides of an axle produce different force, the vehicle can pull to one side during a stop, especially on wet pavement.
Manual topic: Air Brakes - Air Brake System Components · From the Air Brakes practice bank (AB-020).