Suzuki UY125 Service Manual page 221

Complaint
Insufficient brake 1. Worn shoes or drum.
power. (UY125) 2. Too much brake lever play
3. Excessive brake lever play.
4. Friction surfaces of shoes are dirty with oil or
5. Excessively worn brake drum.
Brake squeaking. 1. Carbon adhesion on pad surface.
(UY125S)
2. Tilted pad.
3. Damaged wheel bearing.
4. Loose front-wheel axle or rear-wheel axle.
5. Worn pads.
6. Foreign material in brake fluid.
7. Clogged return port of master cylinder.
8. Brake pad surface glazed.
Brake squeaking. 1. Carbon adhesion on shoe surface.
(UY125)
2. Tilted shoe.
3. Damaged wheel bearing.
4. Loose front or rear axle nut.
5. Brake pad surface glazed.
6. Worn shoe.
Excessive brake 1. Air in hydraulic system.
lever stroke. 2. Insufficient brake fluid.
(UY125S)
3. Improper quality of brake fluid.
4. Worn brake cam lever.
5. Excessively worn shoes and/or drum.
Excessive brake 1. Worn brake cam lever.
lever or pedal 2. Excessively worn shoes and/or drum.
stroke.
Leakage of brake 1. Insufficient tightening of connection joints.
fluid. (UY125S) 2. Cracked hose.
3. Worn piston and/or cup.
Symptom and possible causes
dust.
http://mototh.com
SERVICING INFORMATION
Remedy
Replace.
Adjust.
Adjust.
Replace.
Replace.
Repair surface with
sandpaper.
Correct pad fitting or
replace.
Replace.
Tighten to specified torque.
Replace.
Replace brake fluid.
Disassemble and
clean master cylinder.
Repair surface with
sandpaper.
Repair surface with
sandpaper.
Correct shoe fitting or
replace.
Replace.
Tighten.
Repair surface with
sandpaper.
Replace.
Bleed air.
Replenish fluid to specified
level: bleed air.
Replace with correct fluid.
Replace.
Replace.
Replace.
Replace.
Tighten to specified torque.
Replace.
Replace piston and/or cup.
7-7