Hydraulic Pump Troubleshooting

___________________can only occur on the suction side of the pump (Book page 38)

• Cavitation

• Pseudo-Cavitation

• Leakage

• Collapsing and Air bubbles

Excessive noise from a pump could be an indication of ______________

• Cavitation or pseudo-cavitation

• Internal leakage

• An incorrect valve setting

• External leakage

__________________ is the result of air bubbles entering the pump's inlet (Page 39)

• Cavitation

• Pseudo-Cavitation

• High pressure

• Vortexing

In the height between the pump inlet and the surface of the oil in the reservoir is too high ________________ can occur (Page 32)

• Cavitation

• Pseudo-Cavitation

• Vortexing

• Viscosity

______________________ is the formation and collapse of gaseous oil cavities in the liquid as it flows through a pump (Page 32)

• Cavitation

• Pseudo-Cavitation

• Vortexing

• Viscosity

An increase in flow from the ___________ can indicate excessive wear (Page 29)

• Outlet of an actuator

• Pump

• Case drain

• Motor

A _________________ is evidence of the malfunction you observe in a hydraulic system causes a fault (Page 5)

• Cause

• Symptom

• Remedy

• Failure

____________________ level troubleshooting is the process of determining what failed in a particular component (Page 6)

• Symptom

• First

• Component

• Final

To perform an out of circuit test, a component can be placed on a ________________ to provide basic circuits to test the component (Page 10)

• Reservoir

• Calibration tester

• Test bench

• Work cell

Before you bleed the system pressure during troubleshooting,__________________ (Page 14)

• Check the pump flow rate

• Check the system pressure

• Remove all shields

• Support any over running loads