Insane Hydraulics
Bold and audacious blog about fluid power
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Let's Talk About Hydropneumatic Accumulators (Part 2)
My (Latest) Thoughts on Aftermarket Spares for Hydraulic Pumps and Motors.
Exploring the Design of a Low-Cost 100-bar Digital Pressure Gauge.
Testing Another Cheap Digital Pressure Gauge Kit.
This week I opened yet another 15000 hour+ PV180 (impaired by unscheduled "hydraulic fluid enhancement" with generous amounts of water), and I, once again, found a "sneaky" failure that I've seen before (on this and other pump series). I feel I need to address it again in Something You Should Know Before Overhauling a Parker PVplus Pump.
The Most Embarrassing Mistake of My Career as a Hydraulic Technician.
Not so long ago I described how I had to set the neutral of several large closed-loop pumps, and I mentioned a "secret technique" that I used on the pumps and said that I would reveal it one day. Well - today is the day, and I present to you an "alternative centering technique" in Setting Hydraulic Pumps With Lasers
Some details of The Analog Front End of the Cheapest Digital Pressure Gauge.
Adding another myth to the collection - Bigger Motor Displacement Automatically Guarantees Bigger Torque.
A Simple Way of Protecting DIY Steel Parts From Rust.
Testing the Cheapest Digital Pressure Gauge I Could Find
You know me - I like taking stuff apart, and naturally, when we got several of these "extremely economical" digital pressure gauges, I immediately decided to break into one - The Cheapest Digital Pressure Gauge I Could Find. And, of course, a Happy New Year to All!!!
Merry Christmas to all and thank you for being there for this blog! And also - a short video today in When Valves Sing. (Unfortunately, YouTube's video compression made the digital pressure gauge reading somewhat blurry, and I didn't make a close-up shot of the gauge's screen, but, hopefully, it still conveys the message. I'll make sure to make a better one the next time I catch one of these).
I kind of screwed up... again... And I am glad I did because fixing my blunder armed me with another piece of useful practical knowledge, and now I can pass the "weaponry" on to you in Something to Bear in Mind When You Assemble Multi-Section Load Sensing DCVs.
About the O-ring Patent and More....
A three-step learning tip in What Should You Read to Learn Hydraulics?.
How to Get a Discount at Any Hydraulic Shop.
One of the questions I hear a lot is "What is the best way to test our closed-loop pump?". To which, if you are an owner of something "closed-loopy" and I don't know you, I always reply - "If you have to ask this - don't do it. Either get someone who knows his way around closed loops to do it for you or educate yourself about how your transmission works, and then you'll know what to do." However, if I am convinced that you are skilled enough to safely work on a closed-loop system, and are just looking for a tip or a second opinion, one of the things I do is refer you to an old post of mine about testing closed-loop pumps. Today, I decided to go back to it, add some new pictures, do some editing, and, of course, the mandatory "https re-factoring", and so I present to you the new old - Testing Closed-Loop Pumps in the Field.
I am throwing this post in the air to see what happens because I am not entirely sure that the things that I am saying are correct. Consider it to be a field report of sorts - Setting the Neutral of a Rexroth A4VSG500EO2 Closed-Loop Pump.
This week I had to "attack" a set of four (enormous) badly centered closed-loop pumps, which made me go back to my "Finding Zero" series, where I discuss techniques for adjusting the correct null position of different types of closed-loop pumps. Me being me - I had to re-do everything, and therefore, I, present the three-article series once again - Part 1, Part 2, and Part 3.
Troubleshooting a Rexroth M4-15 Load-Sensing Valve
Another very embarrassing mistake of mine in Counter-Balance Valve Relief Function With A Closed-Center DCV.
This short blog is more than a simple "back-engineering" session. Aside from documenting a Rexroth motion control manifold that I've been repairing a lot lately (always with the same "malfunction"), this is also a story about a good example of a bad example and a hydraulic diagram of an interesting over-center valve arrangement that can be used on equal area rotary actuators - Rexroth R978035707 Motion Control Manifold.