Hydraulic Accessories A Flashcards Preview

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Flashcards in Hydraulic Accessories A Deck (12)
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1
Q

Reservoir function

A
  • warms or cools
  • de aerated fluid
  • settles out contaminants
  • reduces turbulence
  • acts as a platform
2
Q

Coolers/heaters symbols

A

-arrows point in direction of heat (energy transfer either out/away for cooler or in for heater)

3
Q

Size of reservoir

A

-2-3 times the rated capacity of the pump

4
Q

Reservoir types

A
  • open or vented to atmosphere
  • pressurized like most we see
  • closed circuit when return flow goes back to pump.
5
Q

Reservoir Mounting styles

A
  • flat top
  • L-shaped
  • overhead stack best for cavitation
  • vertical mount
6
Q

Functions of hydraulic fluid

A
  • transfers energy
  • lubricate
  • seal
  • carries heat away
  • flushes contaminants
7
Q

Know how to read ISO range code

A

-2,5,15 particle count per ml

8
Q

Contamination

A
  • causes 80% of component failures

- new oil, built in (assembly), ingressed (leaks, adding oil, etc…), generated (heat, wear)

9
Q

Filters vs. Strainers

A
  • filters have elements, a bypass valve and a bypass indicator
  • strainers wire screens
10
Q

Beta ratios (know the calculations)

A

-beta 10 would be 10 over 1, beta 300 would be 300 over 1

11
Q

A good breather

A

-3 micron filter

12
Q

Most seseptible to contaminants

A

-servo and proportional valves