Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS) for M1101, M1102, and Trailer Chassis

TM 9-2330-392-14&P 4-8 Change 2 Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS) for M1101, M1102, and Trailer Chassis - Continued Item No. Interval Location Procedure Not Fully Mission Capable If: Item To Check/ Service 3 (Con’t) Semi- annual Tires b. Check tire tread depth. Tread should not be worn beyond level of wear bar (1). Wear bars (1) are molded across the tread pattern and are only noticeable in the valley between the center rib (2) and the lugs (3). The letters TWI (Tread Wear Indicator) are molded on the tire sidewall (4) to aid in locating the wear bar (1). If excessive wear, replace. b. Tread is worn beyond level of wear bar. 4 Semi- annual Wheel Assem- blies a. Check stud nuts to make sure that they are not loose or missing. If any are loose, tighten. If any are missing, replace. Torque nuts in accordance with para 4- 32. a. Any stud nuts are missing. b. Inspect wheel bearings and races for damage. If any bearing needs replacing, replace all bearings on both sides (para 4-33). Repack wheel bearings in accor- dance with Appendix G. b. Any damage is found. c. Inspect wheel cylinders for leaks or damage. c. Any leaks or damage is found. d. Inspect inside of drum for scoring. If scored, notify DS maintenance. d. Any scoring is evident. e. Inspect brake shoes for glazing or wear. If any shoe needs replacing, replace all shoes on both sides (para 4-24). e. Brakeshoe is glazed or thickness is less than 1/8 in. (3.2 mm). f. Adjust service brakes (para 4-23).