TM 9-4310-394-13 Table 2-1.  Operator Preventive Maintenance Checks and Services for the Air Compressor Unit, Model PD32T5. Location Item No. Interval Procedure Not Mission Capable If: Item to Check/Service 20 After COMPRESSOR a.  Check for proper oil level OIL DRAIN Fill with oil as needed. See LO 9-4310-394-12. b.  Inspect for damaged drain trough or missing mounting hardware. AIR RECEIVER 21 Before AIR HOSE Inspect air hose for cracks Air hose is cut or cracked. and cuts.  Check fittings Fittings are damaged. for damage. 22 Before INFLATION Inspect for broken glass or Glass is broken or GAUGE damaged handle. handle is damaged. 23 Before AIR GAUGE Inspect gauge for broken Glass is broken. glass. 24 Before RELIEF VALVE Inspect relief valve for Relief valve is damaged. damage. 25 Before UNLOADER Inspect unloader valve for Unloader valve is damaged. VALVE any damage. 26 Before UNLOADER Inspect for damaged muffler. Unloader valve muffler is VALVE damaged. is damaged. MUFFLER 27 Before VIBRATION Inspect for damaged vibra- Vibration mounts are MOUNTS tion mounts.  Check for loose damaged.  Mounting hard- or missing mounting hard- ware is loose or missing. ware. 28 Before AIR RECEIVER Inspect air receiver tank Air receiver tank is dam- for damage. aged. 29 Before DRAIN COCK Inspect drain pipe for dam- Drain cock is damaged. age.  Check that drain cock Drain cock does not operate operates smoothly.  Check smoothly. that drain cock is closed. 30 During AIR HOSE Check that air hose does not Air hose leaks air. leak when air pressure is present in hose. 2-9