
19
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 Gal. per 10
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 fitting. 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.
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