The issues which can arise when switching brand and/or type of hydraulic oil, is a question I get a lot. And the crux of this problem, is:
1. You can never completely drain ALL of the original oil out of the hydraulic system; and therefore:
2. There WILL be some mixing of the original and the new oil, so how … Read more

The objective of flushing a hydraulic system is to eliminate sludge, varnish, debris and contaminated or degraded fluid from conductor walls and other internal surfaces and system dead spots.

Reasons for performing a system flush include:

1. Fluid degradation – resulting in sludge, varnish or microbial deposits.
2. Major failure – combined with filter overload, which disperses debris throughout the … Read more

I got this question from a Hydraulics Pro Club member:

“We have experienced Micro Biological Contamination (MBC) in marine fuel oil systems for several years but we are starting to see MBC in marine hydraulic systems. This can be very bad news for hydraulic systems. How can we prevent it?”

Micro biological or microbial contamination is basically the growth and … Read more