9. Malfunctions, causes, and remedies
EN
88
Malfunction Cause Remedy
Motor runs with
difficulty and at a low
speed
o Ambient temperature too low
(see “Technical Data,” Chapter 3)
o Aged grease, motor is overloaded
o Motor circuit breaker has tripped
• Increase ambient temperature
• Replace grease
• Identify and resolve cause
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
pressure 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
o or check valve on pump element
defective or filter clogged
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