Inspection item Every Place 1 3 6 12 Months 170 500 1000 2000 Hours Knuckle King pin looseness Crack and deformation I + C + I Steering axle Wheel alignment Left and right turning angles M M BRAKING SYSTEM Brake pedal Play and reserve Braking effect M I + +- + +- - C Parking brake Pull margin Braking effect Looseness and damage of rod and cable Looseness and damage of level link I I I + t- + - + t t + t I Brake piping Leakage, damage and installation status I + C t Master cylinder or brake valve and wheel cylinder Function, wear, damage, oil leakage and loosening of installation I Brake drum and brake shoe Clearance between drum and lining Wear at shoe sliding contact portion and lining Drum wear and damage Shoe operating state Anchor pin rusting Fatigue of return spring1 Automatic adjusting mechanism func- tion M e- +- t I I I I M I Backing plate Deformation, crack and damage Looseness of mounting I T