Contamination is often found in the hydraulic systems on which much of the
expensive, vital machinery aboard ship depends for its power and control.
This video is about the dirt and water which can contaminate hydraulic fluid, enough
to bring things to a grinding halt. First we see what we mean by dirt, the obvious
swarf, paint chippings, corrosion scale, etc. However there is more to it if you look
under a microscope, even small particles can cause a hydraulic system to fail.
Contamination need not only be solid particles, water too brings its own problems.
The video shows what can happen if care to avoid contamination is not taken - both
to machinery and vessel. Good principles when opening up and re-assembling
hydraulic equipment are shown.The way to flush a system is described. Taking of
samples at regular intervals and checking is demonstrated.