Contamination Indicators

Question 1

Why is it important to have contamination indicators?

Answer 1

Confirm the cleanliness standard of the oil so preventing damage to components

Question 2

What does cleanliness of hydraulic fluid ensure?

Answer 2

Maximum efficiency of servicing time and servicing costs

Question 3

What are the 3 methods of measuring the effectiveness of a filter?

Answer 3

Mechanical (visible piston movement)

Pressure differential (optical indicators)

Electrical and or electronic

Question 4

How do piston indicators work?

Answer 4

Rise in pressure due to a blocked filter overcomes the cracking pressure of the NRV activating the Visual alarm

This causes the flow of unfiltered fluid

Question 5

How does the pressure differential indicator work?

Answer 5

Moves in response to differential pressure

Question 6

How does an electrical/electronic indicator work?

Answer 6

Measures pressure differential, when pressure is too high due to a blockage the filter switch is made shut to give a visual warning