Shop Talk Blog

The Official Blog for Texas Final Drive

Glossary of Basic Symbols Found in Hydraulic Circuits


In order to interpret hydraulic circuit diagrams, it's important to know what the basic symbols are and what they mean. This post is meant for beginners, but can also serve as a good review and reference for those more experienced with reading hydraulic schematics.

Here are a few other Shop Talk Blog posts you might find extremely useful:

Valve Blocks on Final Drive Hydraulic Motors

Valve blocks, in one form or another, can be found on all hydraulic motors -- including final drive motors and travel motors. In this Shop Talk Blog post, we are going to answer some common questions about valve blocks.

Here are some other posts from our Shop Talk Blog series ...

Hydraulic Fluid Injection - Do You Understand the Dangers?

Hydraulic fluid may seem relatively harmless to work with -- until it is pressurized. In this Shop Talk Blog post, we are going to take a look at why hydraulic fluid under pressure is so dangerous, what happens when you come into contact with it, and what you can do to minimize those dangers when you're on the job.

Note: If you're working with pressurized hydraulic fluid and feel a prick (like electricity) on your skin, please seek medical attention right away.

Identifying the Hydraulic Ports on a Final Drive Motor

There can be up to five hydraulic connections to your final drive motor or travel motor, and this is true whether you have a mini-excavator, skid steer loader, or compact track loader. In this Shop Talk Blog post we will discuss each hydraulic port, including how to identify them and what their purposes are.

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