16. BRAKE SYSTEM MXU 500IRS TROUBLESHOOTING 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 Poor brake performance Brake noise · Air in brake system · Contaminated brake pad surface · Deteriorated brake fluid · Excessive brake disk run out · Contaminated brake pads and brake disk · Incorrectly installed caliper · Worn brake pads · Brake disk or wheel not aligned · Worn brake master cylinder piston oil seal · Clogged brake fluid line Hard braking · Deformed brake disk · Seized hydraulic brake system · Unevenly worn brake caliper · Seized piston 16-3