3.    Lubrication  Instructions  For  Air  Compressor  (Model  3LE6A).    It  is  recommended  that  the  oils  listed  in  the lubrication  chart  in  the  front  of  this  manual  be  used  when  available.    If  these  oils  are  not  available,  any  good  quality mineral motor oil (not multigrade) with a viscosity grade of SAE 10W20 may be used if it meets the requirements of the American  Petroleum  Institute  classification  code  SE-CC  or  SE-CD,  military  specification  MIL-L-46152  or  HIL-L-2104C. The crankcase oil capacity of the air compressor model number 3LE6A is 0.50 gallons. NOTE The  crankcase  is  connected  to  the  air  intake  silencer  or  suction  line  through  a  breather  valve.    Faulty operation of this valve or clogging of the metered hole will result in too high a crankcase pressure and promote oil consumption. 4.  Troubleshooting The Air Compressor (Model 3LE6A). Condition Possible faults Suggested remedy 1.  Insufficient air pressure a.  Air leak(s) a.  Check and correct as necessary b.  Air filter choked b.  Service filter c.  Air pressure switch incorrectly set c.  Adjust switch d.  Air consumption exceeds capacity of d.  Check equipment connected. compressor e.  Damaged valve(s) e.  Inspect valves and replace parts where necessary. f.  Pressure gauge defective f.  Check and replace if necessary g.  Release valve of air pressure switch g.  Check mechanism of valve. not airtight during loading periods If leak cannot be cured, replace valve. 2.  Unit does not speed up a.  Low voltage at motor terminals a.  Check generator output. Adjust if necessary b.  Ambient temperature too low b.  Increase temperature in room c.  Pressure release valve of air pressure c.  Check operation of valve; switch malfunctioning replace if necessary 3.  Air receiver pressure rises a.  Air pressure switch incorrectly set a.  Set switch to unload com- above maximum and causes or out of order pressor at rated maximum safety valve to blow pressure. Replace switch if it does not respond 4.  Receiver does not hold a.  Non-return valve leaks a.  Check for broken valve and pressure springs b.  Air leak(s) b.  Check and correct as necessary 5  Too frequent starting a.  Air pressure switch incorrectly set a.  Increase pressure difference and too short operating b.  Non-return valve leaks b.  See 4a periods c.  High condensate level in receiver c.  Drain condensate more frequently 6  High oil consumption a.  Oil level too high a.  Do not overfill crankcase. Keep level within lower half of sightglass b.  Breather valve malfunctioning b.  Replace breather valve c.  Piston ring(s) worn or broken c.  Have condition of piston rings checked 7.  Loading periods too long a.  Excessive air consumption a.  Decrease consumption b.  Compressor not in optimum condition b.  Have compressor inspected c.  Sticking or damaged valves c.  Clean or replace 8.  Unit does not start a.  Electrical failure a.  Check or have electrical system checked b.  Air pressure between stopping and b.  Wait until air pressure is starting pressure setting lower than pre-set starting pressure of air pressure switch c.  Coupling sleeve damaged c.  New sleeve 2A