SYM 13. BRAKE
13-5
TROUBLE DIOGNOSIS
DISC BRAKE
Soft brake lever
1. Air inside the hydraulic system
2. Hydraulic system leaking
3. Worn master piston
4. Worn brake pad
5. Poor brake caliper
6. Worn brake lining/disc
7. Low brake fluid
8. Blocked brake pipe
9. Warp/bent brake disc
10. Bent brake lever
Hard operation of brake lever
1. Blocked brake system
2. Poor brake caliper
3. Blocked brake pipe
4. Seized/worn master cylinder piston
5. Bent brake lever
Uneven brake
1. Dirty brake lining/disc
2. Poor wheel alignment
3. Clogged brake hose
4. Deformed or warped brake disc
5. Restricted brake hose and fittings
Tight brake
1. Dirty brake lining/disc
2. Poor wheel alignment
3. Deformed or warped brake disc
Brake noise
1. Dirty
lining
2. Deformed brake disc
3. Poor brake caliper installation
4. Imbalance brake disc or wheel
DRUM BRAKE
Poor brake performance
1. Improper brake adjustment
2. Worn brake lining
3. Worn brake drum
4. Worn brake cam
5. Improper brake lining installation
6. Seized brake cable
7. Dirty brake lining
8. Dirty brake drum
9. Brake pad worn in brake cam area.
10. Poor contact between brake arm and
camshaft indent
Tight operation or low return speed of
brake lever
1. Worn/broken/crack return spring
2. Worn
drum
3. Dirty brake lining
4. Brake seized caused from dirty brake
drum
5. Seized brake cable
6. Worn brake cam
7. Improper brake lining installation
Brake noise
1. Worn brake lining
2. Worn
drum
3. Dirty brake lining
4. Dirty brake drum
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