NVE MEC 5000 - Maintenance

MEC 5000, 6500 & 8000/P | 19www.natvac.com | 800.253.5500
Maintenance
• With force feed type, the lubrication rate is adjustable
at dripper and should be checked on a regular basis. Oil
should be supplied to pump at a rate of 1 drop every 2
seconds.
• Averageusageofoilisapproximately1-2qts.per40hours,
depending on operation.
• Oilshouldbechangedevery2000hoursingearper
housing, if equipped.
• Frontbearing should be greased approximately every 4
months. Use caution when greasing bearing not to over
grease, as this can cause damage to seals.
• Normalvane life is approximately 2000 hours; however, this
will vary greatly with temperature, material being pumped
and proper maintenance.
• Occasionallyliquidanddirtmayenterthepumpcausing
vanes to stick in the rotor slots along with excessive vane
and housing wear. When this occurs you must clean the
inside of the pump.
Cleaning the inside of the pump
• Removeairinlethoseorpressure relief valve.
• Runpumpatanidlewiththechangeover valve in neutral.
• Pour1pintofdiesel fuel into pump through the air inlet
ortting.Allowpumptorunfor30secondsthenturnthe
change over valve to vacuum.
• Repeattwostepsaboveseveraltimes,andthenpour2oz.
of oil into the pump and reassemble.
• Stoppumpandturnslowlybyhandwhilelisteningforvanes
dropping.Allvanesshouldmovefreelyintherotorslot.