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The KISS Principle IV

Last week we ended by noting heat build up is minimal as we use nearly all of our input  horsepower to perform a work function. Using power to perform work does not appreciably add to system heat. Hydraulic oil flow under pressure consumed as a leak through a worn pump or motor, passing over a relief valve, pressure drop through hoses and fittings, or through a compensator valve will add heat directly in proportion to the pressure drop and flow loss inherent in the complete system.

In addition to the efficient use of pressurized oil, a large hydraulic oil sump is included in our systems. This allows for additional dwell time in the sump which enhances natural cooling and dissipation of any air entrained within the oil.

These and other design criteria allow us to eliminate the need for an oil cooler, including its direct and installation cost thereby reducing the price of the machine to our customers.

Perhaps the most important reason is eliminating the need for a machine owner to clean out a chaff/dirt filled oil cooler to keep the oil cool. If the system stays cool naturally, you will not experience a “cooked” hydraulic system that needs high cost replacement parts.

How do you know if a hydraulic system is over heated. I have observed operators say it is so hot I can’t touch it, and it may be hot, but is it too hot. An old rule of thumb says that up to 15 Degrees F. over ambient is acceptable. This equates to about 225 Degrees in most climes.

When you consider that 140/145 Degrees F. is scalding, and will blister your skin, touching is probably not an accurate test or a safe practice. 

Continued next week.

Happy screening,

Brad Schnittjer
Blog # 9



I will continue my comments about the many advantages of Orbital Action Screening in my next Blog. Meanwhile, look over our Videos and Job Stories to learn more about Orbital Action Screening. Our products, with their user friendly features and high performance levels could take you into a new season with a much higher profit potential.

Send us your requirements by filling out and submitting the Intended Use Form and you will soon have full details and a quote for the correct model and available options to fulfill your job application needs

“The Finer Cut”, is Brad’s Blog. Each issue will cover a topic of interest about our machines, our industry, our customers and more. I am excited about the opportunity to use a Blog to broaden our communications with our customers and industry. I invite you to return and visit from time to time, cruising through previous issues to learn many details regarding our products.

I also invite you, our reader to contribute by offering your comments. Please send your thoughts to, by letter or fax, 563-922 9060.

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Orbit Screens, Inc.
722 3rd Street

P.O. Box 345
Delhi, Iowa 52223
Phone: 563.922.9230 * Fax: 563.922.9060

Orbit Screens® is a Registered Trade Mark of Orbit Screens, Inc. 

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