Table 2-1. Preventive Maintenance Checks and Services (Cont)

TM 9-2320-360-20-1 Table 2-1. Preventive Maintenance Checks and Services (Cont) ITEM TO BE NOT FULLY ITEM INTERVAL CHECKED OR PROCEDURE MISSION NO. SERVICED CAPABLE IF: 24 Semi- GAS NOTE annually PARTICULATE FILTER UNIT (GPFU) Replace precleaners and particulate filter if any of the following conditions exist: physical damage or water immersion, clogged filter resulting in insufficient air flow, or if the filters exceed criteria established in FM 3-4. a. Inspect and replace, if required, precleaners and particulate filter in accordance with FM 3-4 and local climatic conditions. b. Check operation of GPFU (TM 9-2320-360-10). (1) Listen for gas particulate filter motor operation. (2) Disconnect five air duct breakaway sockets (1) from mounts (2) and feel for steady air flow. 2-52