You know that the presence of metal particles or dirt in your hydraulic fluid points to some issues, but there is another form of contamination that you usually can’t see: air. And when your hydraulic system has air contamination, it can lead to some serious problems for your compact equipment (including your final drive motors).
This is the first of a multi-part series about air contamination of hydraulic fluid
Here's Part 2: Foaming Hydraulic Fluid: What You Need to Know
Here are a few other Shop Talk Blog posts you might find interesting: