mxer mxu 150 Workshop-manual : Page 185

          13. REAR WHEEL/SWING ARM/
    HYDRAULIC BRAKE                                                              ATV 150/125


 TROUBLESHOOTING
 Rear wheel wobbling                            Poor brake performance
 · Bent rim                                     · Brake not adjusted properly
 · Faulty tire                                  · Worn brake linings
 · Axle not tightened properly                  · Worn brake shoes at cam contacting area
                                                · Worn brake cam
 Soft rear shock absorber                       · Worn brake drum
 · Weak shock absorber spring
 · Faulty damper
 Loose brake lever                              Tight brake lever
 · Air in hydraulic brake system                ·Seized piston
 · Brake fluid level too low                    ·Clogged hydraulic brake system
 · Hydraulic brake system leakage               ·Smooth or worn brake pad


 Hard braking                                   Poor brake performance
 · Seized hydraulic brake system                Contaminated brake pad surface
 · Seized piston


 Brake noise
 · Contaminated brake pad surface
 · Excessive brake disk run out
 · Incorrectly installed caliper
 · Brake disk or wheel not aligned

 Poor brake performance (Disk Brake)
 · Air in brake system
 · Deteriorated brake fluid
 · Contaminated brake pads and brake disk
 · Worn brake pads
 · Worn brake master cylinder piston oil seal
 · Clogged brake fluid line
 · Deformed brake disk
 · Unevenly worn brake caliper




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