Bulletin MSG30-5511-M1/UK
22
Parker Hannifin
Pump & Motor Division Europe
Trollhättan, Sweden
Service Manual/Spare Parts
Series F11
Cavitation
Cavitation
Cavitation marks in the cylinder barrel
bores, on the port side or on the valve
plate depends on air in the oil.
Reasons can be when inlet pressure/
flow isn’t sucient. Example when
stopping a fan drive and inertia will run
the motor.
Why cavitation?
• Too high speed
• Too low inlet pressure
(pump mode)
What consequence?
• A metallic sound comes from the
system
• Material damage as craters in the
goods which contaminate the
hydraulic system
• Lift o if severe cavitation
• Shaft seal leakage
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