Quick Couplers: Maintenance & Faults

Objectives

  • Explain the importance of cleaning quick couplers before connecting them.
  • List common faults with quick couplers.

Why Quick Couplers?

Quick couplers are easily overlooked as simple, passive components, but they are an important part of a hydraulic system.

A neglected quick coupler can easily become a point of failure.

Keep It Clean

Using contaminated (dirty) hydraulic fluid is the quickest way to shorten the life of a hydraulic system.

One of the easiest ways to introduce contaminants is through the quick couplers.

A Few Symptoms of Contamination
  • Directional valves stick.
  • Relief valves won't close.
  • Pumps wear out faster.
  • And so on...

This is why the cap should be replaced on a quick coupler whenever it is not in use.

More importantly, the quick coupler needs to be sprayed with lubricant, or wiped down with a clean cloth before it is connected.

Keep in Mind

  • Just because a quick connector looks clean doesn't mean that it doesn't need a quick wipe, or some spray lubricant.
  • Damaging contaminants can be much smaller than the human eye could ever detect!

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