Brake System Troubleshooting - DAELIM HISTORY 125 Service Manual

14. BRAKE SYSTEM
SERVICE INFORMATION· · · · · · 14-1
TROUBLESHOOTING· · · · · · · · 14-1
BRAKE FLUID/BLEEDING· · · · 14-2
BRAKE PAD REPLACEMENT · · 14-4
SERVICE INFORMATION
GENERAL SAFETY
● Do not allow foreign material to enter the system when replenishing brake fluid.
● To prevent chemical changes, do not mix different types of brake fluid.
● Do not use the old brake fluid again.
● Brake fluid can cause damage to painted, plastic, and rubber surfaces. Take precaution not to allow parts to be
contaminated by the brake fluid.
● Do not reuse sealing washers.
● Clean the disassembled parts with brake fluid, and check for any clogged passage with compressed air.
● Bleed the brake hose after removing it.
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 CALIPER· · · · · · · · · · · · 14-6
MASTER CYLINDER· · · · · · · · · · 14-8
BRAKE DISK INSPECTION · · · · 14-11
PARKING BRAKE · · · · · · · · · · · · 14-11
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.
14
14-1