1 3 6 12 Place Every 170 500 1000 2000 TRAVELING EQUIPMENT 1 3 6 12 Months 170 500 1000 2000 Hours Wheels Tire cuts, damage and uneven wear Loose rim and hub nuts Tread depth Metal fragments, stones or other foreign matters on tires Rim, side bearing and disc wheel damage Front wheel bearing abnormal sound and looseness Rear wheel bearing abnormal sound and looseness I T M I I I I + + -+ + t - t + C t + + + t t t t + t +- Front axle Housing crack, damage and deforma- tion I Rear axle Beam crack, damage and deformation Looseness of axle beam in vehicle longitudinal direction M * I M STEERING SYSTEM Steering wheel Play and looseness Operating status I I t + C C + t Gear box Oil leakage Looseness of installation I T + + + + t + Power steering Oil leakage Looseness of mounting and linkage Power steering hose damage I I t +- + C + C I