skid steer hydraulic pump problems factory

Cat skid steer hydraulics not working solutions are not very common, sometimes they can be quite pricey to fix. There are a few things that can cause this problem. This article will attempt to solve common problems like the one you have now and some more minor problems. It won’t give you a guaranteed fix for your problem but I will share with you some solutions that have worked for me in the past.

A Cat Skid Steer is a machine that helps farmers with their farm equipment. It has a set of tracks that allow it to move along the ground, and it can also move along a skid plate. This machine helps farmers with things like moving their tractor around, and it is also used for things like harvesting crops.

One of the problems that people have with their Cat Skid Steers is that they may not be working correctly. There are a few possible solutions to this problem, and it all depends on the specific situation.

A cat skid steer is an agricultural machine that helps farmers to move large loads of crops or livestock. It works by using hydraulics to move the loader’s weight while the tractor skids on the ground. This allows the machine to move over obstacles and around corners with ease. It’s a great machine to use on the farm, and if you want to buy a skid steer, here are some tips that will help you.

A good skid steer for sale should be well built. You want to look for one that has been well made as it will last for years. It should also be easy to operate so that you can do it without any problems. If it’s too complicated, then you won’t be using it regularly and this will lead to a lot of maintenance.

One common symptom of a low hydraulic fluid level is that the skid steer will not move. A few common solutions to this problem are to check the fluid level and top off as necessary, or replace the hydraulic system altogether. true 6. The Hydraulic pump is not working properly. If the skid steer consistently stalls, the hydraulic pump may be bad or need to be replaced.

If your cat hydraulic system is not working, there are a few solutions you can try. First, check to see if the system is kinked or bent. If it is, you can have a professional repair the system. If the system does not appear to be kinked or bent, then you may be able to fix the problem yourself. Here are some tips on how to fix a cat hydraulic leak:

1. Check for clogs and debris in the lines. This is a common cause of hydraulic leaks. Remove any clogs or debris that you find using a plunger or a snake.

5. Replace the pump and motor if you have a leak. The most common place to find oil leaks is at the corners of the impeller, so inspect these areas first.

7. Water damage is another frequent cause of failed systems, so look for signs of water damage, such as rust in the pump housing and hoses, which are exposed to water when the system is not running.

Cat skid steer hydraulic systems have been known to break down over time. If the hydraulic system is not working properly, there are a few solutions that may work. One solution is to try and determine the cause of the problem and fix it accordingly. Another solution is to replace the hydraulic system.

There are a number of possible causes for a cat skid steer mechanical system not working. Below are some solutions to common problems. If the problem is not listed, please contact your Cat dealer for assistance.

If your cat skid steer is not working, there are a few steps you can take to troubleshoot and fix the problem. Here are some common electrical problems and solutions:

2. Check the wiring – Make sure all of the wires are connected properly and that they are not twisted or damaged. Damaged wiring can cause problems with the engine and control system.

3. Test the engine – Turn on the engine and check for any errors or malfunctions in the engine. If there are problems, your cat skid steer may need to be repaired or replaced.

If your cat engine is not working, there are a few solutions that you may try. One common problem with cat engines is the hydraulic system. If this system is not working correctly, it can cause the engine to not start or run properly. Here are some common problems and solutions for cat engines that are not working due to a failing hydraulic system.

1. Check the fluid levels – Make sure the hydraulic fluid is at the correct level and that the skid steer is getting enough of it. Make sure the hoses aren’t kinked or twisted.

If your Cat skid steer hydraulic quick attach isn’t working, there are a few solutions you can try. If it’s not, you can try tightening the nut on the end of the pin or using a wrench to twist it. If that still doesn’t work, you may need to replace the quick attach.

Solution 1: Check the hydraulic fluid levels. Ensure that there is enough hydraulic fluid in the system. If there is not enough hydraulic fluid, add more until the skid steer maneuvers as desired.

Solution 3: Try different attachments. If attaching the skid steer to a different type of linkage is not working, try attaching it to a cable instead of a chain.

Are you having trouble activating your cat skid steer auxiliary hydraulics? Don’t worry, we’ve got a solution for you. Here are some tips to help activate your cat skid steer hydraulics:

1. Check the fluid level. Make sure the hydraulic fluid is full and at the correct level by checking the dipstick or reservoir. If the fluid is low or empty, add more using a syringe or pump.

2. Clean the area around the hydraulic lines. Use a degreaser or brake cleaner to clean away any dirt, grease, or debris that may be blocking the hydraulic lines.

5. Try activating your cat skid steer auxiliary hydraulics again. If everything appears to be working properly, you can skip to step 6 below. If not, continue on to step 6 below to find out how to fix your cat skid steer hydraulic issues.

6. Check the hydraulic oil level in your cat skid steer auxiliary hydraulic system. If the oil is low, you can add a few drops of oil to top it off. Make sure the oil level does not drop below the fill line on your reservoir cap.

The first solution is to check the fluid levels in the hydraulic system. Make sure that the fluid levels are correct and that the hoses are connected properly. If the fluid levels are low, you may need to add more fluid to the system.

If the hydraulic system is not working at all, you may need to replace the machine. This is a more complex repair that should only be attempted by a qualified mechanic.

If your cat skid steer hydraulics are not working, there are a few solutions that you can try. One solution is to check the fluid levels in the hydraulic system. Make sure that the reservoir is full and that there is no water seeping into the system. Another solution is to clean out any debris or clumps that may have formed in the hydraulic lines. Finally, if all else fails, you can have a technician come out and look at the system.

Things like restrictions and blockages can impede the flow of fluid to your pump. which could contribute to poor fluid flow. Air leak in suction line. Air present in the pump at startup. Insufficient supply of oil in pump. Clogged or dirty fluid filters. Clogged inlet lines or hoses. Blocked reservoir breather vent. Low oil in the reservoir

Now that we’ve ensured that the directional control is not reversed, it’s time to check that the drive motor itself is turning in the right direction. Sometimes incorrect installation leads to mismatched pipe routings between control valves and motors, which can reverse the direction of flow. Check to see that the motor is turning the pump in the right direction and if not - look at your piping.

Check to ensure that your pump drive motor is turning over and is developing the required speed and torque. In some cases, misalignment can cause binding of the drive shaft, which can prevent the motor from turning. If this is the case, correct the misalignment and inspect the motor for damage. If required, overhaul or replace motor.

Check to ensure the pump to motor coupling is undamaged. A sheared pump coupling is an obvious cause of failure, however the location of some pumps within hydraulic systems makes this difficult to check so it may go overlooked

It is possible that the entire flow could be passing over the relief valve, preventing the pressure from developing. Check that the relief valve is adjusted properly for the pump specifications and the application.

Seized bearings, or pump shafts and other internal damage may prevent the pump from operating all together. If everything else checks out, uncouple the pump and motor and check to see that the pump shaft is able to turn. If not, overhaul or replace the pump.

If your pump is having problems developing sufficient power, following this checklist will help you to pinpoint the problem. In some cases you may find a simple solution is the answer. If your pump is exhibiting any other issues such as noise problems, heat problems or flow problems, you may need to do some more investigation to address the root cause of your pump problem. To help, we’ve created a downloadable troubleshooting guide containing more information about each of these issues. So that you can keep your system up and running and avoid unplanned downtime. Download it here.

Check that the pump shaft is rotating. Even though coupling guards and C-face mounts can make this difficult to confirm, it is important to establish if your pump shaft is rotating. If it isn’t, this could be an indication of a more severe issue, and this should be investigated immediately.

Check the oil level. This one tends to be the more obvious check, as it is often one of the only factors inspected before the pump is changed. The oil level should be three inches above the pump suction. Otherwise, a vortex can form in the reservoir, allowing air into the pump.

What does the pump sound like when it is operating normally? Vane pumps generally are quieter than piston and gear pumps. If the pump has a high-pitched whining sound, it most likely is cavitating. If it has a knocking sound, like marbles rattling around, then aeration is the likely cause.

Cavitation is the formation and collapse of air cavities in the liquid. When the pump cannot get the total volume of oil it needs, cavitation occurs. Hydraulic oil contains approximately nine percent dissolved air. When the pump does not receive adequate oil volume at its suction port, high vacuum pressure occurs.

This dissolved air is pulled out of the oil on the suction side and then collapses or implodes on the pressure side. The implosions produce a very steady, high-pitched sound. As the air bubbles collapse, the inside of the pump is damaged.

While cavitation is a devastating development, with proper preventative maintenance practices and a quality monitoring system, early detection and deterrence remain attainable goals. UE System’s UltraTrak 850S CD pump cavitation sensor is a Smart Analog Sensor designed and optimized to detect cavitation on pumps earlier by measuring the ultrasound produced as cavitation starts to develop early-onset bubbles in the pump. By continuously monitoring the impact caused by cavitation, the system provides a simple, single value to trend and alert when cavitation is occurring.

The oil viscosity is too high. Low oil temperature increases the oil viscosity, making it harder for the oil to reach the pump. Most hydraulic systems should not be started with the oil any colder than 40°F and should not be put under load until the oil is at least 70°F.

Many reservoirs do not have heaters, particularly in the South. Even when heaters are available, they are often disconnected. While the damage may not be immediate, if a pump is continually started up when the oil is too cold, the pump will fail prematurely.

The suction filter or strainer is contaminated. A strainer is typically 74 or 149 microns in size and is used to keep “large” particles out of the pump. The strainer may be located inside or outside the reservoir. Strainers located inside the reservoir are out of sight and out of mind. Many times, maintenance personnel are not even aware that there is a strainer in the reservoir.

The suction strainer should be removed from the line or reservoir and cleaned a minimum of once a year. Years ago, a plant sought out help to troubleshoot a system that had already had five pumps changed within a single week. Upon closer inspection, it was discovered that the breather cap was missing, allowing dirty air to flow directly into the reservoir.

A check of the hydraulic schematic showed a strainer in the suction line inside the tank. When the strainer was removed, a shop rag was found wrapped around the screen mesh. Apparently, someone had used the rag to plug the breather cap opening, and it had then fallen into the tank. Contamination can come from a variety of different sources, so it pays to be vigilant and responsible with our practices and reliability measures.

The electric motor is driving the hydraulic pump at a speed that is higher than the pump’s rating. All pumps have a recommended maximum drive speed. If the speed is too high, a higher volume of oil will be needed at the suction port.

Due to the size of the suction port, adequate oil cannot fill the suction cavity in the pump, resulting in cavitation. Although this rarely happens, some pumps are rated at a maximum drive speed of 1,200 revolutions per minute (RPM), while others have a maximum speed of 3,600 RPM. The drive speed should be checked any time a pump is replaced with a different brand or model.

Every one of these devastating causes of cavitation threatens to cause major, irreversible damage to your equipment. Therefore, it’s not only critical to have proper, proactive practices in place, but also a monitoring system that can continuously protect your valuable assets, such as UE System’s UltraTrak 850S CD pump cavitation senor. These sensors regularly monitor the health of your pumps and alert you immediately if cavitation symptoms are present, allowing you to take corrective action before it’s too late.

Aeration is sometimes known as pseudo cavitation because air is entering the pump suction cavity. However, the causes of aeration are entirely different than that of cavitation. While cavitation pulls air out of the oil, aeration is the result of outside air entering the pump’s suction line.

Several factors can cause aeration, including an air leak in the suction line. This could be in the form of a loose connection, a cracked line, or an improper fitting seal. One method of finding the leak is to squirt oil around the suction line fittings. The fluid will be momentarily drawn into the suction line, and the knocking sound inside the pump will stop for a short period of time once the airflow path is found.

A bad shaft seal can also cause aeration if the system is supplied by one or more fixed displacement pumps. Oil that bypasses inside a fixed displacement pump is ported back to the suction port. If the shaft seal is worn or damaged, air can flow through the seal and into the pump’s suction cavity.

As mentioned previously, if the oil level is too low, oil can enter the suction line and flow into the pump. Therefore, always check the oil level with all cylinders in the retracted position.

If a new pump is installed and pressure will not build, the shaft may be rotating in the wrong direction. Some gear pumps can be rotated in either direction, but most have an arrow on the housing indicating the direction of rotation, as depicted in Figure 2.

Pump rotation should always be viewed from the shaft end. If the pump is rotated in the wrong direction, adequate fluid will not fill the suction port due to the pump’s internal design.

A fixed displacement pump delivers a constant volume of oil for a given shaft speed. A relief valve must be included downstream of the pump to limit the maximum pressure in the system.

After the visual and sound checks are made, the next step is to determine whether you have a volume or pressure problem. If the pressure will not build to the desired level, isolate the pump and relief valve from the system. This can be done by closing a valve, plugging the line downstream, or blocking the relief valve. If the pressure builds when this is done, there is a component downstream of the isolation point that is bypassing. If the pressure does not build up, the pump or relief valve is bad.

If the system is operating at a slower speed, a volume problem exists. Pumps wear over time, which results in less oil being delivered. While a flow meter can be installed in the pump’s outlet line, this is not always practical, as the proper fittings and adapters may not be available. To determine if the pump is badly worn and bypassing, first check the current to the electric motor. If possible, this test should be made when the pump is new to establish a reference. Electric motor horsepower is relative to the hydraulic horsepower required by the system.

For example, if a 50-GPM pump is used and the maximum pressure is 1,500 psi, a 50-hp motor will be required. If the pump is delivering less oil than when it was new, the current to drive the pump will drop. A 230-volt, 50-hp motor has an average full load rating of 130 amps. If the amperage is considerably lower, the pump is most likely bypassing and should be changed.

Figure 4.To isolate a fixed displacement pump and relief valve from the system, close a valve or plug the line downstream (left). If pressure builds, a component downstream of the isolation point is bypassing (right).

The most common type of variable displacement pump is the pressure-compensating design. The compensator setting limits the maximum pressure at the pump’s outlet port. The pump should be isolated as described for the fixed displacement pump.

If pressure does not build up, the relief valve or pump compensator may be bad. Prior to checking either component, perform the necessary lockout procedures and verify that the pressure at the outlet port is zero psi. The relief valve and compensator can then be taken apart and checked for contamination, wear, and broken springs.

Install a flow meter in the case drain line and check the flow rate. Most variable displacement pumps bypass one to three percent of the maximum pump volume through the case drain line. If the flow rate reaches 10 percent, the pump should be changed. Permanently installing a flow meter in the case drain line is an excellent reliability and troubleshooting tool.

Ensure the compensator is 200 psi above the maximum load pressure. If set too low, the compensator spool will shift and start reducing the pump volume when the system is calling for maximum volume.

Performing these recommended tests should help you make good decisions about the condition of your pumps or the cause of pump failures. If you change a pump, have a reason for changing it. Don’t just do it because you have a spare one in stock.

Conduct a reliability assessment on each of your hydraulic systems so when an issue occurs, you will have current pressure and temperature readings to consult.

Al Smiley is the president of GPM Hydraulic Consulting Inc., located in Monroe, Georgia. Since 1994, GPM has provided hydraulic training, consulting and reliability assessments to companies in t...

In many factories, the hydraulic pump is the heart of the operation — and hydraulic pump failure can cause huge problems. But why do hydraulic pumps break? In order to avoid hydraulic pump failure, it’s helpful to know what some hydraulic pump failure causes are.

Before getting into the reasons hydraulic pumps break, it’s important to know the signs that your hydraulic pump is broken or in danger of breaking. Some of these signs include:

Noisy System:All mechanical systems make some noise, and hydraulic systems are no exception. But if you are hearing very loud banging or knocking, there’s a good chance that your system is experiencing aeration or cavitation, which could lead to pump failure.

High Temperature:If your hydraulic system is exceeding the recommended temperature level of 82 degrees Celsius, this could be due to a buildup of debris in the filters preventing the system from dissipating heat. This is a problem you will want to address quickly, as high heat can damage your system.

Slow System:If your system isn’t operating as quickly as it’s supposed to, you definitely have a problem. A slow hydraulic system means a loss of flow, which typically means internal leakage.

The major cause of hydraulic pump failure is called fluid contamination. This is an invasion of the hydraulic fluid by foreign materials. Hydraulic pumps and valves are only designed to carry hydraulic fluid, and anything else in them will damage the system, especially since this foreign debris may remain in the system and continue to damage the valves and pipes.

Aeration:Air in the hydraulic fluid can create problems when put under pressure by the pump. When this happens, they can implode and dislodge debris, causing contamination and raising the temperature inside the pump.

Cavitation:Cavitation is a situation where the hydraulic fluid doesn’t fully take up the space in the pump because of unusually high fluid viscosity, an intake line that is too long or an overfast pump, among other reasons. It can lead to problems similar as aeration.

Excessive Heat:An overheated hydraulic system can cause some massive problems for your hydraulic system. It can damage seals, degrade the hydraulic fluid and otherwise compromise the system.

Overpressurization:Hydraulic pump systems are very sensitive and should only operate under specific conditions, including precise pressure levels. Exceeding recommended pressure levels puts undue pressure and wear on the system and can cause it to fail more quickly.

The best way to avoid hydraulic system failure is to keep your system clean. Remember: fluid contamination is the main precursor to hydraulic system failure, so keeping those contaminants out of your system is your best chance to maintain healthy hydraulics. This means high-quality filters in your system that you inspect regularly and change when necessary.

The other major way to keep your hydraulic system up and running is by keeping the components cool. An overheated system can result in real problems, and you may not notice the effects until it is too late. You’ll also want to make sure your system is operating under the right pressure specifications.

A well-maintained hydraulic system can last a long time and be extremely efficient. Although there are many problems that can occur with a hydraulic system, most can be avoided with proper care, and the benefits of having a good hydraulic system for your business can be great — well worth taking good care of your system.

Part of that care is taking quick action when necessary. If you suspect that there is a problem with one or more components of your hydraulic system, the best thing to do is have a professional inspect it and repair any faulty parts that are failing or at risk of failing. The longer you let a hydraulic system problem go without addressing it, the worse the failure will be when it does happen.

Global Electronic Services has factory-trained, certified technicians who are well-versed in hydraulic systems and hydraulic problems. If you’re delaying repairing your hydraulics because you’re afraid of taking them offline, you should know that Global Electronic Services can complete your repair in a matter of days. For more information, call 877-249-1701 or contact Global Electronic Services online.

Be sure to visit us online at gesrepair.com or call us at 1-877-249-1701 to learn more about our services. We’re proud to offer Surplus, Complete Repair and Maintenance on all types of Industrial Electronics, Servo Motors, AC and DC Motors, Hydraulics and Pneumatics. Please subscribe to our YouTube page and Like Us on Facebook! Thank you!

The diesel engine isn’t really the heart of a skid steer. When it comes to a heart (the machine’s pumps), a skid steer or track loader actually has three or four hydraulic hearts. These pumps power fluids — compressed oil — to move, spin, lift the boom, curl the bucket and run a zillion different attachments. This set of hydraulic pumps (gear, hydrostatic, tandem, back to back, variable displacement) come in many configurations, brands and power ranges. Over the last decade in particular, the science and technology behind these systems has made them smaller, more efficient and more sophisticated.

“Probably one of the biggest innovations in the last five to 10 years has been the advent of electronically controlled hydraulic systems. We call them EH systems,” explains Nathan Wood, hydraulics system engineer for John Deere Construction and Forestry. “You’re controlling the hydraulic system precisely with electronic signals. It leads to a lot more controllability and a lot more ability to do different types of automated controls and functionalities.”

“Originally the first skid steers were hydrostatic controlled by mechanical linkages,” says Kevin Scotese, product manager of sales support, compact equipment, at Volvo Construction Equipment. “The next step in the evolution was the implementation of pilot controls, and the last step has been in the improvements of electro hydraulic controls, which provide the possibility to customize the feel, speed and responsiveness. Another technology to maximize the power and reduce parasitic losses is the implementation of state-of-the-art closed center load-sensing systems in combination with the variable axial displacement piston pumps.”

Pretty high-tech stuff, eh? Today, fluid power is being used to control everything from the tracks to the attachments to the cooling fan to automated features such as creep mode, return to dig and settable attachment speeds — all built right into the joystick. But as you might expect, skid steer and track loader hydraulic systems have gotten quite complex, and just like any oil system in a machine, it will definitely require routine maintenance, testing and proper seasonal oil.

Well, that all depends on the size and configuration of each skid steer or track loader. Every brand is somewhat similar, but each unit is engineered uniquely. Let’s break the system down into two parts: 1) the hydraulics powering the boom, bucket and auxiliary circuit and 2) the hydrostatics powering the wheels or tracks. The hydraulic system powering the boom, attachment, automation features and even cooling usually uses up to three pumps — a main hydraulic pump, a charge pump, which provides control pressure, cooling and fan power, and if you get the high-flow option, a third high-flow pump. Without that option, there are two.

“For the pumps powering the arm, bucket and auxiliary hydraulics, smaller machines run a gear pump, but on the larger models this is a load-sensing axial variable displacement pump limiting the parasitic losses and providing better power to the loader functions and auxiliary,” says Scotese. “For the auxiliary, high-flow option on the smaller models, an additional gear pump is utilized in tandem to provide the required flow. On larger models, a higher-capacity load sensing axial variable displacement pump is providing the higher flow. Charge pressure and flow for the transmission and hydraulic fan motor is usually provided by a smaller PTO-mounted gear pump.”

When it comes to powering the tracks or wheels, there is a bigger, double-pronged hydrostatic pump that powers the machine’s mobility. There is a hydrostatic pump that provides flow and pressure to one motor on the right-hand side and one motor on the left-hand side. On a skid steer or track loader, it’s usually one tandem pump or back to back, providing dual power to two motors for each set of wheels or tracks.

Manufacturers use lots of different brands of pumps — Danfoss,Turolla, Rexroth, Concentric, Eaton and Parker Hannifin. These pumps combined with the overall hydraulic systems come with three main specifications — system pressure (psi), gallons per minute flow to the attachment (gpm) and overall hydraulic horsepower (which tops off about 100 hp). Each manufacturer will engineer and market those specs differently.

“Starting with the hydrostatic system, the transmission and drives system, pressures are pretty high, upward of 6,000 psi,” explains Woods. “These are heavy-duty components to get the speed and torque you want. When it comes to the hydraulic system, bucket, boom and aux, typically you’re running between 3,000 and 5,000 psi. We run right around the 3,500-psi range. We find that that allows us to use reasonably sized cylinders and boom geometry to get the breakouts we need, while still maintain the speed we require.”

Hydraulic flow to the auxiliary circuit and the attachment will be determined in gpm and as standard- and high-flow configurations. Bobcat’s tiny S70 skid steer uses 9.8 gpm for its standard flow system. The optional high-flow on the Takeuchi TLV12V2 (the biggest track loader on the market) is 40.4 gpm. The price difference between standard and high flow usually falls right around the $3,500 range (5 to 7 percent more), and the high-flow option is usually more common on the largest skid steers and track loaders.

Let’s start off with this ubiquitous warning: It’s very important to review your owner/operator’s manual before attempting to perform any maintenance to the hydraulic system, taking special care to review the safety procedures listed in the manual. With the variety of options available today such as high flow, bucket self-leveling, ride control and hydraulic quick-attach brackets, there may be up to five or six control valves as well as pumps. All of these components are designed with very tight tolerances, which may fall below 0.001 in. Because of this, keeping the hydraulic system clean is critical to the life of these components.

“Keeping the system clean and cool is the No. 1 objective,” explains Wake. “ASV has the largest cooling packages and hydraulic tank capacities in their respective classes. That combined with double and triple filtering assures the oil is kept both clean and cool. Owners can help by following the maintenance guidelines in the machine’s owner’s manual, as well as making sure to clean around the hydraulic cap before removing. Be sure any hose fitting is cleaned before removal, and wipe off quick-coupler ends before hooking attachments to the machine.”

Contamination can enter the system in a variety of ways. Before removing the hydraulic oil reservoir cap, clean the area around it to prevent dirt from entering the tank. If using a bucket, make sure that there is no loose dirt on the lip. While all machines will have at least one hydraulic filter to remove debris from the system, this filter might be in the return side of the hydraulic system. There is a screen inside the tank to prevent large material from getting into the pumps, but it won’t catch small particles. Make sure you look for features from brands that make using and cleaning the hydraulic system easier.

“A very important feature which is standard on Volvo skid steers is the case drain on the auxiliary block and the pressure relieving by simply pushing in the quick-connect couplers on the manifold which simply vents pressurized oil in the main lines to the tank. This is a very well-liked feature to ease the hookup of hydraulic lines,” says Scotese.

In order to further prevent contamination, make sure to follow the OEM’s service interval for hydraulic filter replacement. This may fall anywhere between 500 to 1,000 hours depending on manufacturer and operating conditions. A plugged up hydraulic filter may cause a variety of issues such as loss of speed or power, overheating of the hydraulic oil and damage of components. What type of hydraulic oil should be used in your loader?

Just as important as the type of hydraulic oil used is the amount in the tank. The operator’s manual will show where the level should be within the sight glass and where the boom and bucket should be located while checking the hydraulic oil level. Most machines should be checked on a level surface while having the boom all the way down and the bucket flat on the ground. Hydraulic oil should be checked daily, if not before every time the machine is operated. If the level is low, look around carefully for leaks. Given the dusty and dirty conditions that skid steer loaders and compact track loaders operate in, it is not uncommon for debris to damage the hydraulics and thus affect things like “feeding speed.”

“Brushcutting and cold planing are a couple examples of demanding applications on a hydraulic system,” says Wake. “Both can use 100 percent power at nearly 100 percent of the time. In demanding applications like this, the key to maximum production is feeding speed. Feeding the attachment at a rate to use 100 percent of the power — but not exceeding it to the point the engine bogs, the attachment slows greatly or the attachment stops — will give the most production with the least demand on the machine and operator. A feed pace with the engine pulling a few hundred rpm off peak, tends to be the sweet spot.”

The accumulation of debris from an application like brush cutting can harm the hydraulic cooler. The oil cooler might use engine coolant or outside air to cool the oil. It is vital that the oil remain within the acceptable operating temperature range. Make sure the oil cooler is free of debris and the cooling fins are fairly straight. “John Deere has an electronically controlled hydraulic fan that can vary the speed based on the required cooling,” says Wood. “It’ll also automatically reverse at a set interval to expel the debris built up on the coolers to help limit the number of times you actually have to physically clean out the cooling package.”

Another common way for contamination to enter the hydraulic system is by using hydraulically powered attachments. Before connecting any of the auxiliary hoses, be sure to wipe off the connectors to get rid of any water, dust or other debris. If an attachment was used on a loader that had a hydraulic failure and spread contamination into the attachment, that contamination may enter the next machine it’s connected to.

“That’s probably one of the more concerning things,” says Gregg Zupancic, product marketing manager of skid steers and compact track loaders with John Deere Construction and Forestry. “When you rent attachments, the question is: Who rented that machine last, and what types of materials are in their hydraulic systems and sitting in that attachment unused for a long period of time? That’s why you do things like hydraulic fluid sampling.”

The Cool Flow hydraulic oil cooler from Loftness Specialized Equipment greatly reduces the risk of overheating in skid steers and hydraulically powered attachments when operating in demanding applications and hot work environments. The automatic thermostat-controlled fan provides adequate cooling to the system whenever needed to boost machine efficiency, even when an attachment is not being used. Unlike most other hydraulic coolers that are mounted near the attachment, the Cool Flow attaches to the roof of a skid steer cab where it is less susceptible to vibration, back pressure, debris and potential impact damage. It is specially engineered to allow full hydraulic flow to the attachment in either direction without risk of damage to the cooler. The Cool Flow has up to 40-gpm flow capacity and is compatible with all brands of skid steers.Concentric, Danfoss, Eaton, home, John Deere, March 2016 Print Issue, Parker Hannifin, Rexroth, Turolla, Volvo Construction Equipment

Hydraulic pumps are used in almost every type of production system, from plastic mold injection machines to the common conveyor belt. With proper maintenance, most hydraulic pumps will operate smoothly for years, but even with proper maintenance, the pressure inside these devices will eventually cause failures that need to be addressed as soon as possible. The way to avoid total system failure is by monitoring your pumps and looking for the following warning signs.

Liquids should remain in the tubes that were designed for them. If you notice any liquids anywhere else inside the pump, you have a problem. A line may have a break, or a seal may be loose. No matter what the case, an interior leak means your pump has gone bad.

Have you discovered liquid on the outside of your pump? This means either an interior leak has worsened or there could be a leak on the HPU that the pump is mounted to. This leakage results in reduced pressure in the system and immediate action is required to repair and salvage the pump. Leaking reduces the pressure, which increases the temperature of the system. This affects the viscosity of the oil, reducing the pressure in the system.

Increased fluid temperatures can be the result of the system’s inability to dissipate heat. In most systems, heat within the fluid dissipates through the fluid in the reservoir and a heat exchanger. Heat can cause the fluid to thin, which prevents proper lubrication and may cause pump leaks, reducing pump efficiency and system performance.

Hydraulic fluid that has a milky appearance is a clear indication of water contamination. One source is condensation buildup on the walls of the fluid reservoir as a result of temperature changes from warm days to cool nights. Water contamination can also corrode the pump and other critical components, which can shorten component life. Periodic fluid changes and draining of the water from the reservoir ensure water removal from the system.

If your seals continuously leak and fail, your pump may be operating with a bent or misaligned rod. Depending on the extent of the damage, a skilled machine shop may be able to repair your existing equipment, allowing you to get the most out of your equipment and minimizing costs.

System moving slow? If performance decreases, this could be a sign that your hydraulic pump is starting to go bad or your system is designed incorrectly. This lack of efficiency indicates a lack of flow.

You never want to let your system run if your pump is suffering from any of these problems listed above because it means your system is on the verge of experiencing pump failure. These symptoms are an indicator that something could be seriously wrong and could result in some expensive damage to your hydraulic system. The hydraulic experts at Pneumatic And Hydraulic Company can help in identifying the warning signs and replacing your pump before the damage becomes too costly.

When a hydraulic system fails, finding the source of the problem can be a challenge. Though hydraulic systems primarily consist of a sump, motor, pump, valves, actuators and hydraulic fluid, any of these parts could be the source of failure. That"s not to mention the additional potential for failure through human error and faulty maintenance practices. If your system fails, you need to know why it fails, how to find the failure and how to keep it running smoothly in the future, all while keeping personnel safe.

It"s often easy to tell when a hydraulic system fails — symptoms can include high temperatures, low pressure readings and slow or erratic operation are glaring problems. But what are the most common causes of hydraulic systems failures? We can trace most hydraulic issues back to a few common causes, listed below.

Air and water contamination are the leading causes of hydraulic failure, accounting for 80 to 90% of hydraulic failures. Faulty pumps, system breaches or temperature issues often cause both types of contamination.

Air contamination is the entrance of air into a hydraulic system and consists of two types — aeration and cavitation. Both can cause severe damage to the hydraulic system over time by wearing down the pump and surrounding components, contaminating hydraulic fluids and even overheating the system. Although we are not pump manufacturers, we know it is essential to be aware of these types of contamination and how to identify their symptoms.

Cavitation:Hydraulic oil consists of about 9% dissolved air, which the pump can pull out and implode, causing pump problems and damage to the pump and to other components in a hydraulic system over time. You can identify this problem if your hydraulic pump is making a whining noise.

Aeration:Aeration occurs when air enters the pump cavity from an outside source. Usually, loose connections or leaks in the system cause this issue. Aeration also creates a sound when the pump is running, which sounds like knocking.

Water contamination is also a common problem in hydraulic systems, often caused by system leaks or condensation due to temperature changes. Water can degrade hydraulic components over time through oxidation and freeze damage. A milky appearance in hydraulic fluid can help you identify water contamination.

Fluid oxidization: Extreme heat can cause hydraulic fluid to oxidize and thicken. This fluid thickening can cause buildups in the system that restrict flow, but can also further reduce the ability of the system to dissipate heat.

Fluid thickening:Low temperatures increase the viscosity of hydraulic oil, making it harder for the oil to reach the pump. Putting systems under load before the oil reaches 70 degrees or more can damage the system through cavitation.

Fluid levels and quality can affect hydraulic system performance. Low fluid levels and inappropriate filtration can result in air contamination, while fluid contamination can cause temperature problems. Leaks can further exacerbate both issues.

Using the correct type of fluid is also essential, as certain hydraulic oils are compatible with specific applications. There are even oil options that offer higher resistance to temperature-related problems. Some oils even offer anti-wear and anti-foam additives to help prevent against wear and air contamination, respectively.

Human error is the base cause of many hydraulic system problems. Some of the most common errors that may result in your hydraulic pump not building pressure include the following.

Faulty installations: Improper installation of any component in a hydraulic system can result in severe errors. For example, the pump shaft may be rotating in the wrong direction, negatively affecting pressure buildup, or pipes may be incorrectly fitted, resulting in leaks.

Incompatible parts: An inexperienced installer may put mismatched components together, resulting in functional failures. For example, a pump may have a motor that runs beyond its maximum drive speed.

Improper maintenance or usage:Using systems outside their operational capabilities or failing to perform regular maintenance are some of the most common causes of hydraulic system damage, but are easy to rectify through updated maintenance policies and training.

The sources of system failures can be tricky to identify, but some hydraulic troubleshooting steps can help narrow down the options. So how do you troubleshoot a hydraulic system? Here are some of the fundamentals.

Check the pump: Take the pump assembly apart and assess all parts to ensure that they are functional and installed correctly. The most common problem areas include the pump shaft, coupling and filter.

Check the fluids:Check the level, color and viscosity of the hydraulic oil to ensure it meets specifications and has not become contaminated. Low hydraulic fluid symptoms include pressure or power loss. When in doubt, drain and replace the fluids.

Check the seals: Look for evidence of any fluid leakage around your hydraulic system"s seals, especially the shaft seal. Leakage can indicate worn-out or blown seals that can cause malfunctions with pumps, motors and control valves.

Check the filters: Ensure filters are clear of plugs and blockages. Common clogged hydraulic filter symptoms include sluggish operation and noisy operation.

Hydraulic system issues are inevitable at some point. However, simple steps can help you avoid these issues and increase the longevity of your hydraulic system. On top of effective troubleshooting, you can prevent hydraulic system failure by taking the following steps.

Follow specifications: We can trace the most common hydraulic system issues back to fundamental system problems like incompatible or improperly installed parts. For this reason, it"s essential to always double-check specifications to ensure your purchased parts can work together seamlessly.

On top of these steps, look into hydraulic system products that are specifically designed to help prevent failures. One such product is Bear-Loc® by York Precision. This innovative locking actuator is a safe, reliable feature for hydraulic components, automatically locking when sleeve pressure is relieved, preventing movement if a hydraulic system fails. This way, your can protect your personnel from injuries related to hydraulic failures. Even better, York Precision offers in-house design, engineering expertise and machining and manufacturing capabilities to produce a hydraulic locking device that meets your exact specifications.

Regularly review hydraulic system maintenance, always following manufacturer recommendations and industry best practices. Also, consider the storage condition, external influences, working pressure and usage frequency of your system to tailor your maintenance schedule and procedures.

Daily tasks:Take care of a few simple daily checks to avoid issues. For example, personnel should check the oil levels, hoses and connections and listen to the pump for abnormal sounds.

Be mindful of location:Do not stand at endpoints while working on hydraulic systems. This safety measure can help prevent loss of limb and life, as there is a lot of pressure built up in these areas that can release and result in life-threatening situations.

The best safety measures, however, are to perform excellent maintenance and use high-quality parts. If you"re looking for a quality hydraulic component manufacturer, York Precision Machining & Hydraulics can help.

In any hydraulic system, the hydraulic pump is usually the most expensive component and if it fails the whole system can be rendered inactive. Hydraulic pumps are extremely sensitive to contaminants and have the highest reliability risk. When a hydraulic pump starts to fail, it can force contaminants and debris further down the system and if this is not intercepted by an effective filter, the debris can then cause damage to other components. With this in mind, it is worth knowing the warning signs of common hydraulic problems and the precautions or actions that should be taken to prevent the lost work time and expense resulting from pump failure. As experts in hydraulic pump repairs, we at CJ Plant reveal the common causes of hydraulic pump failure.

In any mechanical system, components will be subject to wear and tear throughout their working life and will eventually wear out. Poor quality components will obviously have a shorter lifespan and should, therefore, be avoided, but there are a number of system failures common to all models of hydraulic pump that can easily be prevented if users are vigilant and pay attention to the operation of the system they are using. There are three common hydraulic pump failure symptoms that operators should be aware of that can be an indication of impending hydraulic pump failure:

If the hydraulic pump is making a whining noise or producing banging or knocking sounds, it can be assign of aeration or cavitation inside the pump. As the piston operates, pressure inside the pump drops and the resulting higher atmospheric pressure in the reservoir pushes hydraulic fluid along the inlet line into the pump. Anything that reduces this inlet flow can cause dissolved air in the oil to be drawn out forming air bubbles. When these reach an area of high pressure, the bubbles will implode under pressure and the resulting shockwaves will produce a high pitched whining sound. This can be assign of a damaged or blocked suction strainer or a plugged breather cap. High temperature in the fluid can also cause air to be released or low temperature can increase viscosity and slow fluid entering the pump so fluid temperature should be monitored closely. While not a common problem in the UK, systems operating high above sea level can also suffer from insufficient fluid entering the inlet due to atmospheric pressure being too low to push it through. Air from outside entering the system will result in aeration and will result in a knocking or rattling sound in the pump. As the pressure inside the system is lower than outside, any leaks in the suction line or the cylinder seal will cause air to enter the system. Poorly tightened connections on the suction line can also result in this problem. If this is suspected apply a layer of oil over any suspected location for a leak. If a hole appears in the oil as air is drawn in, the leak has been located. The noise will subside momentarily as this happens if aeration is the cause of the sound. If a leak is not located, check the reservoir. If the fluid level is too low, air can also been drawn in here or if the fluid entering the reservoir is dropping from a height it can cause bubbles to form as the fluid splashes which again can then enter the system. Any foaming of the fluid in the reservoir is another sign of aeration as the air exiting the system will cause foam to form.

Hydraulic fluid in a working system should never be above a temperature of eighty two degrees Celsius. A temperature exceeding this can be an indication of a malfunctioning heat exchanger or an overheating final drive motor. Cooler fins and the cooling fan should be cleaned and inspected for any damage, along with the fan belt, Any change in the pressure in the system from the manufactures settings will lead to an increase in temperature, along with other problems. Pressure levels should be checked in case deliberate or accidental adjustment of pressure has been carried out and relief valves checked in case they are damaged or incorrectly adjusted, as this can also lead to a change in system pressure and subsequent overheating. A lowered level of hydraulic fluid in the reservoir can also lead to overheating. if this is the case, the level of fluid should be topped up and the reservoir checked for any leaks that could be leading to this. All filters should checked for build up of debris or blockage as this can also affect pressure in the case of internal filters or cause insufficient flow of air in cooling systems. It is also worth considering the use of an offline filter

If your hydraulic system is running slower than usual, or showing increased cycle times, this is an indication of a drop in pressure within the system which can then lead to a subsequent overheating. This can be an indication of a leak in the system. If it is an external leak, it will usually be easy to locate and repair. However, if no external leak is visible it could be a sign of an internal leak in the gear pump or actuators and a hydraulic flow tester should be employed to test for this and locate the leak for repair.

While using good quality hydraulic fluid and implementing good contamination control systems can avoid many problems, sometimes the worst can still happen. If any of the above indicators are observed, they should not be ignored and the source of the problem located and repaired before they cause further damage. The implosion of air bubbles during cavitation can cause internal wear on the pump and dislodge debris or metallic fragments that can travel through the system, causing wear and erosion to components. These can then lead to further system failure. Aeration can lead to lowered lubrication inside the pump, leading to friction between metal components and the pump seizing up. This can not only damage the pump but also alter the pressure in the system, causing overheating and damage to other components.  Overheating can lower the viscosity of hydraulic fluid, lowering its ability to lubricate and degrading it and shortening its lifespan and causing heat damage to seals, leading to leaks.

Any one of these issues can lead to a cascade effect, causing damage to multiple parts of the overall system and resulting in lost work hours and revenue and expensive repairs. If your equipment is displaying any of these symptoms, call CJ Plant maintenance today. We understand that when your equipment is malfunctioning or damaged you need fast and efficient diagnosis and thorough professional repairs as soon as possible. We carry out hydraulic pump repair and plant maintenance to customers throughout the UK and offer free collection, wherever you are located if we cannot perform repairs on site. We will thoroughly inspect your faulty equipment and offer a full evaluation and no obligation quote for repair. After repair we will return your equipment fully restored to OEM standards with a written twelve month warranty. For further information on the services we provide, please contact us, we will be happy to help.

When a hydraulic cylinder system works optimally, pressure, power, and overall productivity work concurrently without issue. Whereas when a system falters and show increased operational issues such as high temperatures or excessive vibration, troubleshooting the problem can often create additional headaches beyond the system failure itself.

Due to the inherent structure of a hydraulic system, troubleshooting is a fundamental step that can help pinpoint the problem and get your hydraulic system back on track. A thorough assessment might take longer than expected, but it can also help find the root of the hydraulic system failure to ensure all parts of the system have been properly evaluated and operationally sound.

Having multiple parts within a hydraulic system, finding the cause of the system failure often means assessing all parts that could potentially cause failure. Causes of hydraulic system failure include:

Slow Operation.Common causes of slow operating hydraulic systems include thickened fluids, air trapped in the hydraulic system, and worn out hydraulic components.

One of the easiest ways of troubleshooting an inefficient hydraulic system is to divide the system into 2 categories: volume or pressure. From there, you can identify the problem and fix the issue. Basic troubleshooting procedures can include:

Preventing a hydraulic system failure can mean keeping your mobile equipment up and running efficiently. While some system failures are unavoidable, one of the biggest ways to prevent a complete system failure is to implement a maintenance schedule. Taking the time for maintenance can provide peace of mind, in addition, to also potentially helping you detect issues before they spiral out of control.

Troubleshooting hydraulic system failures can be a time-consuming process. Just when you think you have found the root of the problem, it is entirely possible that another problem presents itself.  Decrease your downtime and contact the hydraulic system experts at Hydraulic Cylinders Inc. today.

Replacing a failing hydraulic pump can be challenging. If the wrong alteration is made, you risk damaging your entire hydraulics system. Furthermore, there are many reasons why your pump may be failing, but not all of them may require a full replacement.

If your hydraulic pump isn’t working like it used to, you need to start troubleshooting as quickly as possible. Waiting until total failure will only result in costly downtime for your plant.

Some of the most common causes of hydraulic pump failure include fluid contamination, excess pressure, poor fluid quality, cavitation, excessive temperatures, and uncorrected leaks.

Contaminated fluid is the most common cause of hydraulic pump failure. It can take place when particulates get into the system through a cylinder rod or breather valve. Sometimes deficient repairs are the culprit. Contaminants can change the fluid properties, create buildup, and corrode parts, all circumstances that reduce the system’s efficiency.

Every pump is built to work within a specific safe pressure range. Pressures greater than this overwork the pump. The pump is likely to become damaged and eventually stop working entirely. In extreme cases, excess pressure can cause an explosion.

It’s critical to use high-quality cooling and lubrication oil with the correct mineral content and viscosity. Purity of fluid content is especially important for higher-pressure systems. Fluid that’s too viscous can lead to cavitation, which is a serious risk for pump damage. If the viscosity is too low, heat and friction levels can become dangerously high.

If vapor cavities arise, they can implode under pressure, which can erode the metal and contaminate the fluid. To prevent this, it’s important to properly maintain intake lines, keep fittings and clamps tight, maintain the correct fluid level, and check for leaky pump shaft seals.

Leaks can arise from inadequate seals or internal component damage. If these aren’t taken care of, contaminants may enter the system and compromise the pump’s performance.

When inspecting your pump, looking out for these common signs:Increased Noise:All mechanical actuators make noise during operation, but hydraulic systems should not produce loud banging or knocking sounds. If you notice a new, unusual sound coming from your device, it may be experiencing cavitation or aeration.

High Temperatures: Hydraulic systems should never exceed 82 degrees Celsius/180 degrees Fahrenheit. If you detect a higher-than-average temperature, there may be a buildup of residue in the system. You need to address the problem quickly, as temperature changes can damage a pump quickly.

Put new oil in the tank. Be sure to fill the tank with the required oil grade, as pumps can fail if the wrong oil is administered throughout the system. Pumps require a consistent supply of oil and can fail if the levels drop too low.

Exact life expectancy depends on the specific pump and how frequently it’s used, but pumps often last for quite a few years. The manufacturer of your pump should specify how many hours or cycles a pump can be expected to provide before replacement is recommended.

Another critical factor in pump longevity is preventative maintenance. This includes daily maintenance tasks as well as those that need to be done annually.

In addition, perform any maintenance tasks the manufacturer recommends for your specific pump. And, always keep a record of completed maintenance tasks.

The exact cost depends on the type of pump, the pump manufacturer, and whether the replacement is done by a professional.Often a professional hydraulic pump replacement, including labor and parts, is in the vicinity of $1,500.The price depends on whether you buy directly from the manufacturer or from a third party.

Sometimes direct OEM replacement parts are expensive, and it can take weeks or months at times to receive the part. If you’re experiencing an emergency, or your pump has been discontinued by the manufacturer, purchasing a remanufactured pump may be the best solution for you, as they’re often less expensive than direct OEM replacements and the waiting times are typically shorter.

If you are purchasing a remanufactured pump, be sure to double check that your remanufacturer has an OEM guarantee, as you want to make sure the specifications of the remanufactured pump are the same as the OEM pump you are replacing.

Founded over 25 years ago, we’ve become the leading U.S. manufacturer of aftermarket hydraulic parts. We specialize in remanufacturing and repairing all types of pumps and components from manufacturers like Vickers/Eaton and Rexroth®. All of our pumps are made in-house in the U.S., guaranteed to meet OEM specifications, and are backed by a 12-month warranty.

Every hydraulic pump makes some noise. If all is well with a pump, then this noise stays more or less the same. However, if something goes wrong with the pump or its connected system parts, then you may start to hear sounds that you haven"t heard before.

The fluid that flows through your system needs to move at a smooth and even rate. The pump has to deliver the fluid at a specific flow for things to work.

If something prevents the fluid from achieving and maintaining its optimum flow, then your pump may start to make unusual noises. For example, you may hear a high-pitched whine coming from the pump. This can be a constant or intermittent sound.

If your pump whines constantly, then you may have a cavitation problem. Here, the pump can"t deliver its fluid at the right volume or rate. There isn"t enough fluid coming through the pump"s suction line.

In some cases, this is a sign that your pump"s motor is on the wrong setting. So, the pump itself is working at the wrong speed to create the right flow.

If you hear intermittent whining, then you may have air in your fluid. Sometimes, a leak in your suction line or a seal allows air to get inside and into the fluid. The air creates bubbles in the fluid, which effectively pop as they move. If you have aeration problems, then you may also hear a rattling noise that sounds like stones banging against each other.

A hydraulic pump might get noisy if one of its parts or connections has a problem. A faulty or failing pressure control, bearing, valve, seal, or coupling can make a noise you haven"t heard before.

In some cases, you may hear vibrating clunks as your pump works if you have a problem with a connecting pipe. A loose seal or connector might allow the pipe to move. It then passes vibrations along to the pump itself.

While some noise problems are easy to fix, some are a sign that your pump is close to the end of its working life. Sometimes, this is due to natural wear, usage, and age. However, in some cases, minor problems cause more widespread damage if you don"t fix them quickly.

For example, if you"ve had cavitation problems for a while, then your system may not have been getting the lubrication it needs; it may have ove