14. REAR WHEEL/SWING ARM/ HYDRAULIC BRAKE ATV 50 SPECIAL TOOLS Nut wrench A120F00010 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 14-3