TM 55-1945-205-24-2 0053 00 2 0053 00 Table 1.  Preventive Maintenance Checks and Services. ITEM NO. INTERVAL MAN- HOURS ITEM TO BE CHECKED OR SERVICED PROCEDURE EQUIPMENT NOT READY/ AVAILABLE IF: 1 Monthly .2 Personnel Shelter 1. Clean heating and air conditioning system indoor air filter. (WP 0100 00) 2. Clean heating and air conditioning system vent air filter. (WP 0102 00) 3 Quarterly 20.0 RRDF Modules Inspect for water inside all modules. (WP 0056 00) (WP 0062 00) 5 Quarterly 100 Hours .1 Light Tower Quarterly or every 100 operating hours replace the fuel tank in-line fuel filter. (WP 0171 00) 1 Annually .2 Personnel Shelter Clean heating and air conditioning system internal components. (WP 0105 00, WP 0106 00, WP 0109 00) 2 Annually .2 Light Tower Engine 1. Replace air filter element. (WP 0175 00) 2. Perform functional test of engine oil pressure switch in the protection shutdown system. Contact Specialized Repair Activity (SRA). 3 Annually or 2,400 Operating Hours 1.0 RRDF Modules Pressure test modules and repair leaks, cracks and corrosion. (WP 0057 00, WP 0063 00) Leaks present or structural damage which interferes with operation. 2 Biennially 3.0 Light Tower Engine 1. Drain cooling system, flush cooling system and install new coolant. (WP 0179 00, WP 0178 00) 2 5