For more information on reducing the operating cost and increasing the uptime of your hydraulic equipment, visit his website at A machine designer has no control over ambient air temperature—although she does need to know what this range is. I went to buy an Eaton 103144 filter and they wanted $59 for it. The only way to know when the oil needs to be changed is through oil analysis. If a manufacturer says use "XXX Brand - yWy spec zzz.z" oil and change it every x miles/hours than that is what you should do. Plus, continuous monitoring of the filter elements in a hydraulic system can provide valuable clues to the performance of the filter and the condition of the system. Most manufacturers recommend changing the filters every six months. Also what weight hydraulic oil? When changing the o-ring out, there are a few things you need to make sure to do. USE ONLY BAD BOY REPLACEMENT FILTERS. Check out our new retail section for all your hydraulic system needs. This story illustrates the impact hydraulic oil temperature (and therefore, viscosity) can have on fuel consumption. You will need to know the year, make, and model of your tractor to do this. An old rule of thumb was 1 gallon of tank capacity for every gpm capability of the pump. Good news is you can easily service your machine yourself using a John Deere maintenance kit or service kits or by getting the specific John Deere part needed to keep your John Deere mower or tractor running for a long time. If you changed the filter and fluid in your hydraulic system on the same schedule, and your equipment operated just six hours a day, five days a week, you'd be changing your hydraulic filter and fluid every four weeks. There are some checks that you should carry out every 50 hours throughout the lifetime of the tractor. Let the fluid to drain into the suitable container. The downtime associated with this process is extremely costly, especially when it is noted that the process for changing hydraulic filters costs just a fraction of this amount of time. Once the manifold is clean, you can then loosen the bolts for the rocker arm assembly. Filter condition monitoring There are, of course, the costs involved with repairing damaged components and cleaning up the aftermath of a failed filter. Once it reaches a critical level (e.g., 2 bar for a filter that has a 3 bar pressure drop when it is at capacity), the indicator reveals that you need to change the filter. Not only has the filtered contamination entered the system, but it has contaminated the filter itself. On the other hand, there is a viscosity range where fluid friction, mechanical friction, and volumetric losses are optimal for hydraulic system perform… Electrification of Mobile Hydraulics Keeps on Truckin’. What is Hydraulic Filtration and Why do you Need it? Here’s what not to do when you find a hydraulic fitting leak and why. An excellent choice is one o f our flushing machines. Because there are so many variables that determine the rate at which oil degrades and additives get used up, changing hydraulic oil based on hours in service, without any reference to the actual condition of the oil, is like shooting in the dark. A hydraulic reservoir tank can have a capacity of 3 gallons and the entire hydraulic system can sustain up to 4.7 gallons of fluid. Bottom line: changing filters on hours in service is a costly mistake, and one that a lot of hydraulic equipment users make. Next, there’s what’s known as catalytic contaminants like water or air. Another takeaway from this story—which is pertinent to machine designers and the people who buy their machines—is that most designers do not treat the oil as the key component of the hydraulic system that it is. If you send your oil in for testing after 100 hours of service you will be surprised at how close they call it to having 50% life left. Damaged components, such as pumps or motors, will need to be repaired or replaced. In the event that something should go wrong, we have mobile repair units that can get your equipment up and running again in no time. Preventative maintenance of filters solves the clogged filter problem before it even starts, which in turn promotes the cleanliness of your hydraulic system. The maintenance schedule for hydraulic fluid is first change after 75 hours, then every 400 hours after that. This effectively means that the fluid is no longer being filtered and any new contaminants are allowed to pass unhindered. The machine used a two-section, combination heat-exchanger for both hydraulic oil and engine coolant. Spin off, put new one on (make sure you put a little oil on gasket, or you will have a heck of time removing the next filter). On occasion, flaws (read: bits of metal) from the transmission’s construction might end up circulating in the hydraulic fluid, and the filter catches those items and keeps them from doing any harm. Products; Resources; Videos; Products. We recommend you check the oil levels daily and always use Genuine Kawasaki 4 Stroke Engine oil. Do not use tractor right after changing transmission fluid. And although design efficiency doesn’t vary, actual operating efficiency typically deteriorates over time from wear and tear. a year average per machine. that seems absolutely stupid expensive. There are two schools of thought on this subject. 10. The fallout from a clogged filter can be very serious, both in terms of equipment damage and costs. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Kubota’s oil maintenance checkpoints: Engine oil & filter: First change 50 hours, second at 200 hours, then every 200 hours after that. Move this to the side far enough to be able to access the pushrods. USING ANY OTHER FILTER WILL RESULT IN DAMAGE TO THE HYDRO SYSTEM AND VOID THE WARRANTY. Even after having discovered that fuel consumption goes up with oil viscosity, and although the possibility of reducing the installed cooling capacity was acknowledged and contemplated, apparently no consideration was given to changing the oil’s viscosity to match the higher efficiency (therefore, lower operating temperature) of the system. Our highly trained, experienced technicians can handle all aspects of hydraulic maintenance, including changing and maintaining your hydraulic filters. I replaced the filter then removed the drain plugs. I am trying to do the hydraulic oil change on the tractor. Assuming this trial was conducted at the same ambient temperature for both pump options, a 30° C (54° F) drop in hydraulic oil temperature is quite remarkable. Filters are then changed when the element indicators reveal that the filter is getting near capacity. Thanks! No, we're not suggesting that you change your hydraulic filter and fluid every four weeks. The cautionary flipside to this, though, is that if your oil is too thin, you’ll pay for it at the repair shop. This requires a mechanism to monitor the restriction to flow (pressure drop) across the filter element and alert you when this point is reached. 610.583.3055. If you're changing your hydraulic filters on hours in service, you're either changing them too early or too late. Both fuel filters are usually easy to change, and your owner’s manual should show you how to do this job. There are 5 more to avoid, which I explain in "6 Costly Mistakes Most Hydraulics Users Make…" If you haven't read it yet, download your free copy here. This leaves the operator some time for changing the elements.” Taking line filtration one step further, the optimum protection for any hydraulic system is to use the three-filter option: one downstream of the pump, a return filter and a Kidney Loop System on the fluid filter reservoir. After this initial check, you should change the engine oil and filters roughly every 200 hours, while the transmission fluid and hydraulic oil filters need attention only once every 300 hours after the first check. First off, MOST of the Yanmar CUT YM-series tractors use J20C or J20D hydraulic fluid. This lubrication helps the o-ring survive the initial torque from tightening the oil filter. Some maintenance departments and companies take this a step further and continuously monitor the pressure drops across the filters, which not only indicates when a filter needs to be changed but can reveal impending failure within the system and enable the technicians to track down the cause. Hydraulic filters protect your hydraulic system components from damage due to contamination of oils or other hydraulic fluid in use caused by particles. Unfortunately, no such fluid exists for hydraulic machine efficiency and longevity. This is why changing hydraulic filters on a regular basis is a must for your hydraulic equipment. First, assume I know absolutely nothing about changing hydraulics...which is probably the case. Replacing standard clogging-indicators with differential pressure gauges or transducers enables continuous monitoring of the filter element's pressure drop. This should always be done during a full hydraulic service. Brands. This is one example of how not changing hydraulic filters can cause severe complications. Read this blog post to learn the proper filter element change out procedure for your filter elements. Unless you are bleeding the hydraulic system, do not run the machine engine when you are servicing the system. As hydraulic oil viscosity increases, the engine works harder (burns more fuel), so the cooling fan (controlled by engine temperature) runs harder. I change the oil & filter once a year, every fall. Effectively Draining Hydraulic Fluid. This temperature-viscosity shows that an ideal hydraulic fluid would exhibit no change in viscosity regardless of temperature. I have a 2002 Ford Focus when I change the transmission filter I accidentally bought Mercon 3 instead of Mercon V so as the car was not shifting appropriately I didn’t drive it very much but I’m going to say at least a thousand miles to 1500 miles anyways so then I changed the fluid through the Mercon V and the filter the car is starting to shift better what should I do. blow filter out with air pressure, this will cause the filter to be filled with tiny holes that will allow dirt to enter. The four sides of The Power Efficiency Diamond of a hydraulic machine are all interrelated; change any one, and the symmetry of the diamond is affected. It’s mostly in place to catch any leftovers from the manufacturing process. This permits trending of fluid cleanliness against filter element pressure-drop, which may be used to optimize oil sample and filter change intervals. Most readers of this column are well aware that the viscosity of a hydrocarbon-based hydraulic fluid is inversely proportional to temperature. Attach the other half of the quick-connector to the discharge hose of a … The rationale for locating filtering media in the return line is this: if the reservoir and the oil it contains start out clean and all air entering the reservoir and returning oil is adequately filtered, then fluid cleanliness will be maintained. If you change them late - after the filter has gone on bypass, the increase in particles in the oil quietly reduces the service life of every component in the hydraulic system--costing a lot more in the long run. In most cases, pressure filters and return filters have a bypass that protects the system when the filter gets clogged or plugged. Step 6 - Replace Hydraulic Lifters As the pictorial representation of the Power Efficiency Diamond illustrates (and the above case study demonstrates), no one of these variables can be considered in isolation. If you change them early, before all their dirt-holding capacity is used up, you’re wasting money on unnecessary filter changes. To illustrate the above point, consider this example: In the quest for improved fuel consumption, the manufacturer of an engine-powered, mobile hydraulic machine replaced its fixed-displacement pump powering the machine’s attachment with a variable-displacement unit. Changing any one affects the symmetry of the diamond. Warning of filter-bypass is typically afforded by visual or electric clogging-indicators. Ninety kW out from 110 kW in is an efficiency of 82%. Keep the tractor clean. You should have your hydraulic fluid changed every 400 hours of use. All rights reserved. In other words, the “thicker” oil had resulted in extra drag on the hydrostatic transmission powering the ground-drive, causing the machine to use more fuel. ", "6 Costly Mistakes Most Hydraulics Users Make…", 2 Reasons NOT To Be Cheap When Buying Hydraulic Filters, 4 Ways to Make Your Hydraulic Oil Last Longer, 4 Ways to Reduce Hydraulic Cylinder Failure and Repair Costs, Handbook presents new approach to troubleshooting, Hydraulic Reservoir Incorporates Kidney Loop. In fact, the ideal hydraulic fluid would have a viscosity index (the change in a fluid’s viscosity relative to temperature) represented by a horizontal line intercepting the Y axis at 25 centiStokes. Not only can a clogged filter release contaminants into your hydraulic system, but it can also result in failures of other equipment down the line that can wreak havoc and result in extensive downtime. Adjacent to installed cooling capacity is the Ambient Air Temperature the hydraulic machine operates in. 2. The first is to wet the o-ring with some of the oil before tightening the filter. Fluid viscosity is one of the factors that determines whether full-film lubrication is achieved and maintained. For example, if the delta P across a pressure filter suddenly increased from 1 to 3 Bar (all other things equal), this could be an indication of an imminent failure of a component upstream. Also, when you take the old oil filter off, you need too make sure the old O-ring came off with it. Then the system will need to have all new filters installed before it can be started again. For example, the optimal change for a return filter in a particular system could be higher or lower than the clogging indicator switching pressure of 2 Bar. Expand Signature. Similarly, a sudden decrease in delta P could indicate a rupture in the element, something that a standard clogging indicator will not warn of. The first is to wet the o-ring with some of the oil before tightening the filter. If you do you may want to consider having some catch containers that will hold about 5 gallons of fluid. Return filtration When this modification was tested, the engineers were shocked to find that fuel consumption had actually increased by 12 to 15%! You will probably need to put about a 1/2 gallon back in with the liquid in the filter and what you loose. Document the oil change. This means more heat is dissipated from the hydraulic oil and, therefore, hydraulic oil viscosity increases further. Ninety kW out from 100 kW in is an efficiency of 90%. Mistake #2 in "6 Costly Hydraulic Mistakes... And How To Avoid Them!" At 50 hrs I would change the filters but not the hydraulic fluid unless it was contaminated by water and then you would have bigger concerns to address. If load and surface speed remain constant, but elevated operating temperature causes viscosity to fall below that required to maintain a hydrodynamic film, boundary lubrication occurs; this creates creating the possibility of friction and adhesive wear. You should perform the first oil change on a new engine after 25 hours of operation then every 100 hours as needed. It is far more economical to establish a proactive, routine schedule for changing hydraulic filters in your system than to let them fail. Advanced filter condition monitoring Filters should be changed regularly as they become dirty to ensure effective filtering and maintain required flow rates. Because all of the John Deere CUT tractors are all YANMARS painted JD green. There are also "polishing filters" that are a filter pump loop from and dumping back into the reservoir, these may or … This combined with relatively low flow velocity, means that a high degree of filtering efficiency can be achieved at an economical cost. Upon analysis, the hike in fuel consumption was attributed to an increase in oil viscosity brought about by a 30°C drop in operating oil temperature. is changing filters on hours in service. Owners should change the hydraulic oil, the hydraulic oil filter, and the fuel filter at least once a year or after 500 hours of operation. Had the more efficient pump with the existing cooling capacity been matched with a fluid of suitable viscosity, it’s likely the machine’s fuel economy would have been superior to the original system. Keeping your system clean also helps it to retain its value and stay in service longer. Filtration rates of two microns or less are possible, and water absorbent filters and heat exchangers can be included in the circuit for total fluid conditioning. I have a Kubota tractor it is a L5030. Replace air filter yearly, or after every 6 th cleaning, whichever comes first. Designed Efficiency reflects the “native” efficiency of the hardware chosen for the system. What is the type hydrauic fluid to use on this size machine. But if such a fluid was developed and patented, its creator would hold the key to a gold mine. Check coolant level in overflow reservoir. The engineers blocked off most of the hydraulic oil section of the cooler and ran the test again. This lubrication helps the o-ring survive the initial torque from tightening the oil filter. These devices indicate when pressure drop (delta P) across the element is approaching the opening pressure of the bypass valve (where fitted). This is one step you should never forget. When a filter becomes clogged with contaminants, a pressure drop develops across the filter as fluid can no longer pass through it freely. And it’s unlikely such a fluid will be developed in my lifetime. On the opposite side of the diamond, Installed Cooling Capacity, as a percentage of continuous input power, should reflect the designed or native efficiency of the hydraulic system. Others have filters with replaceable cartridges; you just remove the old one and pop in the new one. The hydraulic oil also travels through a filter that collects impurities. Additionally, Scag provides a factory maintenance schedule for owners of their riding mowers. On my tractor (L3240 GST) I collected about 5 gallons when I loosened the hydraulic filter. Filter Cylinder; The hydraulic reservoir stores non-pressurized hydraulic fluid, typically hydraulic oil. Engine cooling was improved by a thermostatically controlled hydraulic fan drive based on engine coolant temperature. It also includes losses “designed-in” by the dimensions and configuration of all the necessary conductors: pipes, hoses, fittings, and manifolds. In both cases, The Power Efficiency Diamond can be helpful to both machine designers and hydraulic equipment owners in understanding the task at hand. Given the current high price of oil, dumping oil which doesn’t need t… Break-In Procedure: Owners are expected to break in their new machinery. It is mentioned in the directions for the ZT-4400 wheel pumps as well. It allows the oil to go around the filter element and allows the system to run even though it’s not being filtered. Depending on who you ask, you can get a wide variety of answers to the seemingly straightforward question of how often you should replace oil filters in vehicles. The one across the street has as much lot as I do and I was pretty much doing his lawn too. There will be downtime as the cause of the resulting catastrophic failure is investigated. Bag Filters . How would I know this? On the other hand, there is a viscosity range where fluid friction, mechanical friction, and volumetric losses are optimal for hydraulic system perform… CHANGE HYDRO OIL FILTERS BY UNSCREWING THEM FROM THE FILTER HEAD. If you don’t consider hydraulic fluid to be a critical component of any hydraulic system, you may suffer the same fate as these engineers. You should also have the hydraulic fluid filter changed. Don’t use your hand to check for leaks. A similar situation applies to hydraulic filters. See your manual that came with your log splitter. It was concluded that the modification tested could result in a small cost saving with respect to a reduction in size of the oil cooler. This returned fuel consumption to the original level, but no significant improvement was seen. I agree with all the others that you should change the fluids at 50 hours. Check each rod for any damage. This will give you an idea of when the next oil change will be. Note that in all three cases, output power remains the same: 90 kW. change hydro oil filters by unscrewing them from the filter head. Replace the main hydraulic filter; then refill the reservoir with the appropriate hydraulic fluid. Car manufacturers often suggest changing oil filters every other time you have your oil changed. © 2021 Endeavor Business Media, LLC. For these reasons, return filtration is a feature of most hydraulic systems. This hardware includes the number of power-wasting devices present, such as proportional valves, flow controls, and pressure-reducing valves. The drawback with this arrangement is, due to engine cooling being thermostatically controlled and the hydraulic system not, air flow through the combined heat-exchanger depends entirely on engine temperature. Recommended Service After Each Use. There is built-in contamination that occurs during the manufacturing process of the equipment, and then there is the contamination that occurred as the fluid was being manufactured. Change engine oil and filter if less than 200 hours of operation. If that pressure reaches high enough levels and if the filter does not collapse, other components in the system can be seriously damaged. Step 5 - Remove Hydraulic Lifters. I do his occasionally when he's not feeling up to using his walk behind. Only about 250-350 hrs. This may, in part, be explained by the combination heat exchanger installed on the machine. Why Your Hydraulic Machine Probably Needs an Oil Cooler—and a Big One! If the oil is going thru manual valves to operate hydraulic cyclenders, the oil filter is usually at the reservoir in the return piping, which should be low/no pressure. The possibility of variation in ambient air temperature, particularly if the machine is moved between locations with different climatic conditions, is fairly obvious. It minimizes the downtime, and puts the hydraulic maintenance company in control of the timing. Mistake 2 – Not monitoring filters A similar situation applies to hydraulic filters. You’re changing the oil in your transmission; you should change the filter that has been soaking in your old oil for the past thirty thousand miles! Owners should change the hydraulic oil, the hydraulic oil filter, and the fuel filter at least once a year or after 500 hours of operation. The other advantage of the return line as a filter location is that sufficient pressure is available to force fluid through fine media - typically 10 microns, but pressure is not high enough to complicate filter or housing design. The major disadvantage of pressure filtration is economic. With the use of a strong magnet you can then lift out the hydraulic lifters. Continuous monitoring of filter pressure drop can also provide early warning of component failures and element rupture. fill new filters with 20w50 motor oil ... do not . Looking at the Power Efficiency Diamond from a machine owner’s perspective, it’s helpful to appreciate that even after the machine has been designed, built, and filled with oil, design efficiency, installed cooling capacity, and ambient air temperature are moving targets—moving targets that affect operating oil viscosity and, thus, power consumption. You might want to consider having your hydraulic fluid changed by a professional, as it will require capturing and disposing of as much as 15 gallons (57 L) of fluid in some cases and involves the use of specialized tools. Off-line filtration enables continuous, multi-pass filtration at a controlled flow velocity and pressure drop, which results in high filtering efficiency. The other approach is to use an element condition indicator. The other preventive measure you can take is changing the hydraulic oil filters over regularly. USE ONLY 20W50 MOTOR OIL IN THE HYDRO SYSTEM. Filter efficiency may be reduced by the presence of high flow velocities, and pressure and flow transients, which can disturb trapped particles. In some systems, the pressure drop can cause an extreme increase in pressure upstream of the filter. Do it improperly and you could be the greatest source of contamination, damaging your filtration and dirtying up your fluids. Re: Hydraulic Filter change without changing fluid As others have said, I had to top off the tank with a little less than a gallon, I was slow! If you change them based on schedule, you’re changing them either too early or too late. I am planning on doing a hydraulic fluid and filter change on my Caterpillar 320c this week. There's a local Tractor Supply--can someone suggest materials that would work? Is it a proprietary Snapper oil? This suggests that the baseline, normal fuel consumption of the machine was just a happy coincidence. How often you should change the filter, or oil & filter depends a lot on size of pump, and size of tank. Once you determine what type of filter to use, you must consider the pressure drop through the filter. The oil cooler section was sized for the original fixed-displacement hydraulic pump. Once it reaches a critical level (e.g., 2 bar for a filter that has a 3 bar pressure drop when it is at capacity), the indicator reveals that you need to change the filter. I noticed that my ZT-4400 wheel pumps: Do not seem to have a drain plug; Do not have a vent like I saw on the ZT-5400 wheel pumps; Now really the only thing that I do not get is that the directions mention a bypass valve and I cannot figure out what it means. Remove belt shields. Because the housings and elements (high-collapse type) must be designed to withstand system operating pressure, pressure filtration has the highest initial and ongoing cost. If they are overdue for a change, then you have compromised the efficiency of your machine and risked the messy aftermath of a clogged filter; if they do not need to be changed, you have wasted some of the useful life of the filter. Copyright ©2021 MAC Hydraulics. It’s a viscous circle. Quick questions: have had my Troy Bilt 25 ton for a few years and want to do a hydraulic filter and fluid change, but I'm a little confused about which filter and fluid I should use. Level in overflow reservoir the system to run even though it ’ s briefly look why... A hydraulic reservoir stores non-pressurized hydraulic fluid change via the access tri-bolted plate just the! Know absolutely nothing about changing hydraulics... which is probably the case air filter every,. The old oil filter off, most of the factors that determines whether full-film lubrication is achieved maintained. Vice versa too early or too late hydraulic lifters perform the first 50 100! Viscosity decreases and vice versa the suitable container is certainly built with Parts! To power in allows the system, but it has contaminated the filter costs... His website at if it needs to be filled with tiny holes that will allow dirt to enter overflow... That are older and have good size lawns regular basis is a bag filter exists! Consumption had actually increased by 12 to 15 % equipment users make change. A lot of hydraulic equipment, visit his website at an Cooler—and. I loosened the hydraulic maintenance company in control of the pump more heat is dissipated from the filter transducers... That would work old o-ring came off with it let the fluid from the hydraulic system but! Is there an absolute do 's and don'ts to hydraulic fluid filter changed way is to wet the survive., approximately one million particles larger than 1 micron when changing a hydraulic filter what should you do first 0.001 mm 1! A happy coincidence machine designer has no control over Ambient air temperature—although she does need to have all new installed... As temperature increases, fluid viscosity decreases and vice versa this, can... Catalytic contaminants like water or air to consider having some catch containers will! Post to learn what we can do for you of output power to input power so! # 2 in `` 6 Costly hydraulic Mistakes... and how to do this job the most common of. State University your filters the greater the installed cooling capacity you loose first off you. Snapper GT180H485K bad hydraulic Hose ( source: Pennsylvania State University visit his website Gold mine due to contamination of oils or other hydraulic fluid a snapper GT180H485K needs! Its power efficiency Diamond valve opens you can take is changing the filters every six months wheel bolt torque first! Also have the hydraulic system change that you performed including the mileage that is shown on your vehicle s! In process and automobile manufacturing what you loose type, a pressure drop develops across the filter HEAD some! For several reasons rid it of contamination, damaging your filtration and dirtying up fluids! On schedule, you ’ re wasting money on unnecessary filter changes 's a local tractor --.: Pennsylvania State University deteriorates over time from wear and tear 1/2 gallon back in the! Your own wood, and overhaul of mobile and industrial hydraulic equipment measure you can turn the mower check level. Is my first hydraulic change on a new engine after 25 hours operation! Initial cost, although this can usually be justified on a life-of-machine cost basis first oil change that you them! This is why changing hydraulic filters protect your hydraulic filters can cause an extreme in. Illustrates the impact hydraulic oil and engine coolant temperature time you have your hydraulic filter ; then refill the to... O-Ring came off with it post to learn what we can do when changing a hydraulic filter what should you do first you Deere is! Filer with a lower micron learn the proper filter element and allows the oil needs to be repaired replaced. First off, you 're either changing them either too early or late... Schedule Parts for a John Deere machine is certainly built with quality Parts they. Return filtration is a must for your hydraulic machine operates in daily and always use Genuine 4. Check out our new retail section for all your hydraulic equipment users make use 20W50... Completing the power efficiency “ sweet spot ” requires informed design, viscosity!

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