TM 9-2320-361-20 Table 2-1. Preventive Maintenance Checks and Services (Contd). S-Semiannually A-Annually B-Biennially Item Interval Item to be No. Inspected Procedures S A B 33 • Wheel and tire Check each tire for wear using tire tread depth gage. Tread assemblies depth should not be less than 0.13 in. (3.18 mm) as indicated on tire tread depth gage (TM 9-2610-201-14). Refer to TM 9-2610-200-14 and TM 9-2610-201-14 for specific instructions for matching tires and tire rotation. SPECIAL PURPOSE BODIES AND EQUIPMENT 34 • Front winch a. Inspect front winch for secure mounting and broken or missing parts. If loose, tighten (para. 13-5). b. Perform drag brake and automatic brake test (paras. 13-2 and 13-4). 35 • Rear winch a. Inspect rear winch for secure mounting and broken or missing parts. If loose, tighten (para. 13-18). b. Perform drag brake and automatic brake test (paras. 13-2 and 13-4). 2-15