15-2
BRAKE SYSTEM
TROUBLESHOOTING
Brake lever / pedal soft or spongy
● Air bubbles in the hydraulic system.
● Leaking hydraulic system.
● Contaminated brake pad / disk .
● Worn caliper piston seal.
● Worn master cylinder piston seal.
● Worn brake pad.
● Contaminated caliper.
● Caliper not sliding properly.
● Worn brake pad / disk.
● Low fluid level.
● Clogged fluid passage.
● Warped / deformed brake disk.
● Sticking / worn caliper piston.
● Sticking / worn master cylinder piston.
● Worn brake disk.
● Contaminated master cylinder.
● Bent brake lever / pedal.
Brake lever / pedal hard
● Clogged / restricted brake system.
● Sticking / worn caliper piston.
● Caliper not sliding properly.
● Clogged / restricted fluid passage.
● Worn caliper piston seal.
● Sticking / worn master cylinder piston.
● Bent brake lever / pedal.
Brakes grab or pull to one side
● Contaminated brake pad / disk.
● Misaligned wheel.
● Clogged / restricted brake hose.
● Warped / deformed brake disk.
● Caliper not sliding properly.
● Clogged / restricted brake hose joint.
Brakes drag
● Contaminated brake pad / disk.
● Misaligned wheel.
● Worn brake pad / disk
● Warped / deformed brake disk.
● Caliper not sliding properly.
● Hydraulic system contaminated with dust.
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