What colour is OX40 & where is it used?
- Green
- T23’s & T45’s
What colour is OX30 & where is it used?
- Red
- Submarines
What colour is OM33 & where is it used?
Yellow
* T42’s , T22’s
Which type of pump is needed for hydraulic systems?
Positive displacement pump
(Hydraulics needs high pressure pumps)
Name 2 basic actuators
- linear actuator - single or double
- Rotary
Hydraulics
A fluid is defined as..
- Takes the shape of a container
- Transmits power
- Gas or liquid
What are the advantages of hydraulics?
- Reliable
- Simple
- Infinite speed range
- Easily reversed
- No spark risks
Disadvantages of hydraulics?
- Fire risk
- Noise
- Contamination
- Less efficient
At what point do o-rings fail?
- 300 degrees
- Gives off hydrogen flouride which is toxic
PPE for hydraulics
- Gloves
- Boots
- Overalls
- Visor
What are the 2 types of hydraulic oils called?
- Petroleum
- Synthetic
What is Demulsibility?
The ability of fluid to seperate from water
What is the name of this pump?
External gear pump
What is this pump?
Internal gear pump
What is this pump?
Lobe pump
What is this pump?
Multi cylinder radial piston pump
What is this pump?
Single piston pump
What is the purpose of the drain leg?
To return cooling, sealing & lubricating oil from the actuator to the tank
What do accumulators do?
Smooths out pulsations & store potential energy
What does a swash plate do?
Controls capacity
What type of pump is this?
Axial piston pump
What systems use an Axial piston pump
- Stabilisers
- CPP
- Steering gear
What do actuators do?
Convert hydraulic energy to mechanical movement
What are the requirements of a hydraulic fluid?
- Transmit power
- Flow easily
- Lubricate
- Cooling
- Seal
- Be incompressible
