Drum Brakes

  1. A sqeaking noise when the brakes are applied could be caused by?
    Excessive wear to or lack of lubrication on the brake backing plate shoe support pads.
  2. A squealing noise when the brakes are applied could be caused by?
    Glazed brake linings or foreign material embedded in the linning.
  3. A grinding noise when the brakes are applied could be caused by?
    Metal to metal contact of the rivets or brake shoe against the brake drum if the linings are worn.
  4. If the brake pedal is low then it probably means?
    There is excessive clearance between the brake linings and drum or there is a leak in the hydraulic system.
  5. Excessive clearance between the linings and drum can be caused by?
    Malfunctioning automatic adjuster mechanisms or if the driver does not up enough to allow the adjuster mechanisms to keep pace with lining wear.
  6. Iw the pedal is spongy it could be due to?
    A hydraulic brake hose bulging under pressure or cracked or thin drums.
  7. A hard pedal could be caused by?
    glazed linings, or grease or brake fluid on the linings.
  8. Grease or brake fluid contamination can cause the brakes to?
  9. Pedal pulsation could be caused by drums that are?
    Out of round.
  10. Dragging brakes could be caused by?
    Broken or weak return springs, frozen parking brake cables, a restricted brake hose or swelled rubber components due to contaminated brake fluid.
  11. Measure the drum for wear and out or roundness using an?
  12. A drum that is out of round by more than 0.010 will cause?
    A pedal pulsation.
  13. On the brake shoes the lining must be at least?
    0.030 in.
Card Set
Drum Brakes
Drum Brakes