Trouble Diagnosis - Sym Mio 50 Service Manual

Trouble Diagnosis

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
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
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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
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
13. Brake
13-5