14. Operational and pump faults
KFG KFGS KFGL KFGC
Pump malfunctions
Fault
Possible cause Rectification
Pump does not
function when the
key is pressed,
although all electrical
connections are ok.
Electrical control has failed.
Pump drive/motor is defective.
Lubricant level in reservoir is below minimum
Agitator cannot be rotated.
• Check fuse.
• Replace pump.
• Fill lubricant reservoir to "max."
• Replace pump element
Note: metering is indicated by grooves or letters
Pump does not deliver
any lubricant, although
agitator is rotating.
Suction problems due to air pockets in grease
Pump element does not build up pressure, pump
element is worn out. (This is indicated when the
outlet can be closed with a finger once the main
line is removed.)
Lubricant too stiff
• Dismantle pump element and operate pump using
key until
grease discharges from outlet on housing.
• Replace pump element
Note: metering is indicated by grooves.
• If necessary, adjust lubricant to work properly at lowest working
temperature.
Pressure regulating
valve on pump opens
and lubricant leaks out
System pressure is over 200/300 bar, e.g., due to
feeder blockage or blocked lubrication point.
Valve is damaged or contaminated, so it does not
close properly.
• Check system and repair/rework the system so the maximum
system pressure at 20 °C is 200 bar.
• Replace pressure regulating valve.
Page 96
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