TM 9-4310-394-13 Table 2-1.  Operator Preventive Maintenance Checks and Services for the Air Compressor Unit, Model PD32T5 - Continued. Location Item No. Interval Procedure Not Mission Capable If: Item to Check/Service 31 During INFLATION Check that inflation gauge Inflation gauge does not GAUGE operates to indicate air operate. pressure. 32 During AIR GAUGE Check that air gauge indic- Air gauge does not indi- cates 175-200 psi air pres- cate 175-200 air pressure. sure in receiver tank.  If pressure exceeds 200 psi, shut down unit and notify unit maintenance. 33 During RELIEF VALVE Activate relief valve and Activated relief valve does check that air is released not release air. from valve. 34 During UNLOADER Activate unloader valve and Unloader valve does not VALVE check that air is released release air when activated. from valve. 35 During UNLOADER Check that muffler reduces Muffler does not reduce air VALVE air noise when unloader noise when unloader valve MUFFLER valve is activated. is activated. 36 During SAFETY VALVE Pull ring on safety valve and Air is not released from check that air is released safety valve when ring is from valve. pulled. 37 During AIR RECEIVER Check that air receiver Air receiver tank leaks tank does not leak air when when pressurized. tank is pressurized. 38 During DRAIN COCK Drain cock leaks air when air Drain cock leaks air when receiver tank is pressurized. air receiver tank is pres- surized. 39 After DRAIN COCK Open drain cock on receiver to drain condensation from tank.  Leave drain cock open. CHASSIS 40 Before INFORMATION Inspect plates and decals PLATES AND for damage and readability. DECALS Check for loose or missing mounting hardware. 2-10