FUNDAMENTALS
Expressed in PSI
What is pressure
When replacing a hydraulic line, the new line may have more of these
What is reinforcement layers
The pump does this
What is create the flow
This valve is used to unload the pump
What is an unloading valve
The simplest form of an accumulator
What is a spring
Connects all hydraulic components
What are hydraulic lines
When maintaining cylinders, you replace these
What is all seals and packing
Pumps operate on a principal called this
What is displacement
This valve is used to reduce pressure
What is a reducing valve
Many pneumatic accumulators use this inert gas as a way of "charging"
What is Nitrogen
Hydraulic actuators operate by
What is the action of liquid under pressure
To bleed air from the system, you move all control lever this many times
What is 7 or 8 times
Gear type pumps are capable of this type of positive displacement
Have this available to catch oil
What is a suitable container
120M grader has how many piston type, pneumatic accumulators
What is two
Pressure exerted on a confined liquid is transmitted equal and undiminished in all areas and all directions.
What is Pascal's Law
This is the number 1 cause of hydraulic line failure
What is improper routing
The balanced vane pump is a refinement of this
What is the unbalanced vane pump
This valve is a simple one way valve
What is a check valve
Accumulators have this many major types, and what are they
What is 3. Pneumatic, weight, and spring
How to neutralize hydraulic pressure
What is "full range of motion, plus one"
The actuator is the component that does the work. It converts what
What is fluid energy from the pump back to mechanical energy.
Before working on the hydraulic system these must be cool to the touch
What are pumps and fittings
Flow is constant but pressure is varied
What is a tandem center.
Accumulators are usually limited to one function, however all accumulators do this
What is Store Energy