TM 5-3895-374-24-1 OPERATING INSTRUCTIONS (Cont.) DAILY STARTUP 1 Every  day,  check  the  sight  glass  to  ensure  that  the level of oil In the compressor pump is at the required level   (see   Fig   7).   Refer   to   page   12   for   further lubrication information. 2 Make  sure  the  main  power  disconnect  is  shut  OFF See Fig 2 on page 6. 3 Check that power Is connected at the power panel 4 Turn ON the main power disconnect The compressor   will   start   filling   the   receiver   with   air. When  the  air  pressure  in  the  receiver  reaches  the level  preset  at  the  factory,  the  pressure  switch  will shut down the electric motor. As air Is used and the pressure  level  In  the  receiver  drops,  the  pressure switch will restart the motor and the compressor will begin refilling the receiver. WARNING!   High   temperatures   are   generated   by   the electric  motor  and  compressor  pump.  To  prevent  burns and other injuries, DO NOT touch the compressor while it is running Allow It to cool before handling or servicing. Keep children away from the compressor at all times. NOTE:   If   the   unit   does   not   operate   properly,   SHUT DOWN IMMEDIATELY, and contact your nearest   Service   Center   or   call   the   factory’s Customer  Service  Department.  DO  NOT  return the unit to the store where It was purchased. COLD WEATHER STARTING In cold weather, check that the air filter Is clean ALWAYS use a fresh, high quality compressor oil, which meets the minimum specifications given on page 12. Open  the  petcock  to  depressurize  the  compressor  to zero  PSI  before  starting  If  the  compressor  still  will  not start, move it to a warmer location. SHUTDOWN 1 Shut OFF the main power disconnect 2 The centrifugal unloader will bleed off pressure in the pump and transfer tubes See Fig 6. This is Important because   If   air   remained   trapped   In   the   pump,   it would   create   back   pressure   which   would   make restarting the compressor difficult or impossible. 3 Reduce  pressure  In  the  receiver  tank  through  the outlet hose You can also pull the relief valve ring and keep it open to relieve pressure In the receiver See Fig 5. 4 Wear  protective  eyewear  and  open  the  petcock  at the bottom of the receiver tank to allow moisture to drain from the tank See Fig 3 on page 8. SERVICE INTERVAL CHART Perform the following maintenance at the intervals indicated below Inspect and Clean Air Inlet Filter Weekly Check Compressor Pump Oil Level Daily Change Compressor Pump Oil Every 250 Operating Hours Operate All Pressure Relief Valves Daily Check Belt Tension Every 250 Operating Hours Drain Receiver Tank Daily Check and Tighten all Bolts After first 8 hours and every 500 Operating Hours (Do not overtighten ) 200-2009 (page 3-635)