Hydraulics Flashcards
Pump
Createflow
Oil temperatures should never exceed
250 F 125C
contamination in the system is best controlled by
Proper maintenance
What is orifice
A component that restricts flow and creates pressure drop
What is a Pumps rating
Displacement, flow rate , pressure rating
Cracking pressure
When pressure is enough to move the ball or poppet slightly not fully
What dose an actuator do
Converts fluid power into mechanical power
Cylinder are classified as
Single acting \ double acting
What dose a vented system require
Tank mounted breather
Where dose the radial lip seal sit
On motor or rotating shaft
Dynamic seal
Seals a moving component
Static seal
Seals in one spot
How much can o rings be compressed
10 to 20 percent
U or V packing sit how
Open side face high pressure
Where dose the whisper seal sit
Along the pin
What oil is used for summer
ISO 46 /SAW 20
What oil is used in winter
ISO 32 / SAE 32
How is hydraulic flow created
Difference in pressure
What dose the term fluid’s definition include
Gasses and liquids
How is pressure calculated
Force divided by area
Accumulators
A container that stores fluid under pressure/mainly absorbs shock loads/
What is a balanced cylinder
Has a rod on each side and travels at same speed
Bypass
A secondary passage for fluid flow
Suction pressure
The absolute pressure on the inlet side of pump
Full flow pressure
The pressure at witch a valve is wide open and passes at full flow
Static pressure
The pressure in a fluid at rest
How can a DCV be operated
Solenoid/leaver/pedal
Piston pumps operate at what pressures
5000 psi
An electromagnetic switch
Solenoid
Pressure over ride
The difference in the pressure reading from the time a relief valve first opens (cracking pressure) until it is passing all pump flow to tank.
