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Frequently Asked Questions

Will my current hydraulic fluid deliver MEHF performance?

DYNAVIS - Frequently Asked Questions
Consult with your supplier or review the product technical data sheet to see if the fluid properties include high VI (>150) in combination with good shear stability. Most suppliers offer high quality fluids that will provide some or all of the critical MEHF features. The MEHF performance level does not conflict with other OEM specifications or regional standards.

What about dirt in the hydraulic fluid?

Stanley Hydraulic Tools Faq
Dirt in any system (air, electric, or hydraulic) will cause wear. Air tools suffer most from dirt because the compressor is sucking in dirt all the time and tool exhaust ports allow dirt to get into the tool. Since the hydraulic system is a sealed system, dirt gets in only by carelessness. And, to protect against this, the hydraulic system has a full-flow filter.

Why take samples of aircraft hydraulic fluid?

Skydrol.com - Frequently Asked Questions
The performance of the entire aircraft hydraulic system can be affected by the condition of the hydraulic fluid. If the hydraulic fluid additives are damaged or depleted, the hydraulic fluid may no longer perform adequately in the system. Only after sampling the hydraulic fluid for the purpose of fluid analysis can one determine the condition of the additives. This allows action to be taken before damage to the hydraulic system can occur.

When should hydraulic fluid samples be taken?

Skydrol.com - Frequently Asked Questions
Routine Sampling - Each system should be sampled at least once a year or every 3000 flight hours, or whenever the airframe manufacturer suggests. Suspicion of Contamination - If contamination is suspected, fluids should be drained and replaced, with samples taken before and after the maintenance procedure.

What happens when fuel is contaminated by hydraulic fluid?

Skydrol.com - Frequently Asked Questions
In laboratory tests, concentrations of up to 5% Skydrol in jet fuel were cooled to -30oF. No gel formation or any other effect was observed. 5% is the maximum concentration possible in the worst case of a leak in a fuel tank heat exchanger.

Will I need hydraulic fluid on hand?

Industry Systems: MSC Scrap Material Handlers Frequently Ask...
Your new baler will not be shipped with hydraulic fluid in the tank. Your Pre-Start Up Manual will provide the correct number of gallons of hydraulic fluid and a list of suggested fluid manufacturers. The hydraulic fluid needs to be located at the installation site upon the arrival of the equipment so that the installation contractor or dealer’s installer can add the fluid into the tank prior to start-up.

How is MEHF different from a standard HV or high VI fluid?

DYNAVIS - Frequently Asked Questions
The ASTM and ISO definitions of the HV product grade, and the JCMAS definition of the high VI “W” grade, require that the fluid have a viscosity index of over 130. These fluids are primarily designed to provide good low temperature start-up performance, which they do quite well.

What is the fluid?

Frequently Asked Questions
We use glycerin, FDA approved. This food additive is found in many recipes, the most common being frosting (or icing) on cakes. It is also used in some skin creams, makeup and lipstick. Others use animal-based Glycerin or water combinations.

What is MEHF?

DYNAVIS - Frequently Asked Questions
MEHF stands for Maximum Efficiency Hydraulic Fluid, a performance level definition designed to give the operator confidence that the fluid in use has been formulated to deliver optimized energy efficiency over the entire spectrum of operating conditions. MEHF products are formulated to minimize mechanical energy losses at low temperature, and also reduce internal pump leakage under high pressure/high temperature operating conditions.

What type of hydraulic fluid should I put in the power unit resevoir?

FAQ Page
The hydraulic fluid you can use is any hydraulic fluid that is kept on the shelf of major automotive stores. The fluid we use is Citgo brand AW32 hydraulic oil also used in farming and agricultural applications, or any tractor hydraulic fluid will work.

How much and what kind of hydraulic fluid should be used in my log splitter?

TISCA - Products - SWISHER - FAQ
Fill your log splitter hydraulic fluid reservoir approximately 1" below the reservoir tank fill hole. This should be at least five gallons of fluid on 22, 26, and 34 Ton models and at least seven gallons for the 34-ton Deluxe model. Dextron 2, Dextron 3, or Universal Hydraulic Oil is recommended for all Swisher log splitters.

Is there a field test kit available to analyze hydraulic fluid samples?

Skydrol.com - Frequently Asked Questions
Yes, but it is used only for a crude estimate of acid number, and not a precise numerical value. The Skydrol Test Kit is available from TBM Corporation, 314-721-5590, and other Skydrol distributors.

HOW MUCH HYDRAULIC FLUID DOES THE POWER PUMP HOLD?

Donovan Enterprises - Frequently Asked Questions, FAQ
APPROXIMATELY ONE GALLON. THE POWER PUMP’S FLOW RATE IS APPROXIMATELY .75 GALLON PER MINUTE OF HYDRAULIC FLUID.

How often do I change the fluid?

Frequently Asked Questions :: ChemFree's SmartWasher :: Worl...
Under normal use, and proper maintenance, you should never have to change the solution. That is one of the biggest advantages of the SmartWasher. Ozzy cleans the solution of contaminants, leaving you clean solution to work with. Hydrocarbon materials are bioremediated in the SmartWasher so your "used" solution does not need to be hauled away as hazardous waste.

What is DYNAVIS® MEHF??

DYNAVIS - Frequently Asked Questions
MEHF is a general industry performance level definition. DYNAVIS is the formulation technology developed, patented, and marketed by RohMax Oil Additives to provide optimum efficiency performance, as well as other regional and OEM specific specifications. When you select a fluid containing DYNAVIS, you can be assured that this product will deliver the full range of features that will boost your Power, Efficiency, and Performance.

Q: What kind of fluid is in my jack plate’s hydraulic pump?

Bob's Machine Shop - Frequently Asked Questions
A: Your jack plate’s hydraulic pump takes 20 weight (20w-20) non-detergent motor oil or a light weight hydraulic oil.
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