SKF MKU Series - Page 93

93
9
Malfunction Cause Remedy
Motor runs with
difficulty and at a low
speed
o Ambient temperature too low
(see technical data) • Increase ambient temperature
Pump does not convey
lubricant; no pressure
build-up
o Pump jammed
• Measure motor current If current is impermissibly high:
• Dismantle pump, crank by hand:
• If resistance is high, replace the pump.
o Motor jammed
• Measure motor current If current is impermissibly high:
• Dismantle motor, crank by hand:
• If resistance is high, replace the motor.
o
Incorrect rotational direction of motor
• Check pressure-regulating valve to make sure that opening pres-
sure is correct and that there is no contamination or damage
• If opening pressure is incorrect or if the pressure-regulating valve
is damaged, replace the valve. Only use original SKF spare parts.
• If contaminated, clean the pressure-regulating valve
No pressure build up in
the main line
o Air in the main line
o Main line leaky/broken
• Vent main line
• Repair main line
o Pressure-regulating valve does not
close
• Check pressure-regulating valve to make sure that opening pres-
sure is correct and that there is no contamination or damage
• If opening pressure is incorrect or if the pressure-regulating valve
is damaged, replace the valve Only use original SKF spare parts.
• If contaminated, clean the pressure-regulating valve
EN
9. Malfunctions, causes, and remedies