In case you are looking for Rexroth Axial Piston Pumps Troubleshooting, this is the article to read. Everyone has their own unique troubleshooting issues. I will talk about some of the most common problems that I have found with axial piston pumps and how you can get them resolved.
Unusual noises
If you hear a weird sound from the axial piston pump of Rexroth, you can check out some things to identify the origin of the noise. Air entering through seals and getting into the engine is primarily responsible for an axial piston pump noise occurrence. Remove the covering plate on top of the pump and use your flashlight in looking for bubbles or leakage at joints between cover and pump body. You should therefore repair any such that you observe.
Impeller blockage by debris is another common cause of axial piston pump noise . Before going further, always make sure to remove them if you see any pieces or large chunks of metal or plastic stuck within your impeller. Once you have found where it is coming from, you will be able to find a solution for its repair.
Insufficient suction conditions
Axial Rexroth piston pumps are necessary for the circulation of fluids in factories, oil refineries and other industrial environments. Whenever there is inadequate suction conditions, the pump may not get to its optimal level of operation. In this article, we will discuss what causes poor suction conditions and how to solve them.
1.Remove the filter and check for clogs. In case you come across any clog; use a plunger to dislodge it.
2.Rinse with water containing dishwashing soap till clean then dry it completely prior to being put back in place
3.Check if there are kinks or leaks on the suction hose and straighten any kink or leak using a needle or piece of wire
Drive speed too high
Rexroth Axial Piston Pumps have a reputation for their efficiency and durability. Nevertheless, overheating and failure can happen if the speed is too high. Here we will discuss common problems associated with high speed drives and how to fix them.
1.The pump may lock up or start making funny sounds. One possible reason why the pump may be seizing up is excessive heat build-up in the shaft or cylinder. To know if there is excessive heat build-up use reduce drive speed by small amount. If this does not work, you will need to replace the pump.
2.Pump overheating can be caused by defective impellers as well. Also, insufficient lubrication or a poor fit between impeller and housing can cause overheating. In case of faulty impeller, remove it from the pump and inspect it for wear or other damages; otherwise replace it.
3.Misaligned gears are another cause of pumps over heating since they tend to revolve at slower rate than what they should be doing.
There is a problem with the driving power.
The Rexroth axial piston pumps are among the most famous and widespread pumps used in commercial and industrial markets nowadays. However, due to their wide use, they are also often prone to problems. Among the main things to look out for when troubleshooting Rexroth Axial Piston Pumps include identifying its source of power failure. Once this is done, an appropriate measure will be taken.
Misdirection of rotation
Rexroth axial piston pumps usually rotate clockwise while running. If it rotates wrongly; this may cause malfunctioning of the pump. To know if rotation is wrong or right, check whether water comes out from the inlet side of the pump or if there are debris or other materials that might have blocked inside it. If you find that your pump does not work properly, replace it.
Inadequate mounting of a pistons unit
Improper mounting can cause difficulties with your Rexroth axial piston pump. Ensure that the axial piston unit is securely mounted and that there are no hindrances to fluid flow within it. In case you still encounter challenges, contact Rexroth representative for proper guidance.
Poor Assembly Mounting or Hydraulic Line Routing/ Poor Coupling Installation
For many industrial and commercial uses, Rexroth axial piston pumps have always been a favorite. Nonetheless poor assembly mounting, hydraulic lines routing or coupling installation can cause breakdowns on these machines as we shall see in this blog section where we discuss some common troubleshooting steps for these kinds of pumps.
Resonances caused by defective / unsuitable elastomeric couplings
Rexroth axial piston pumps just need proper maintenance otherwise they will consistently give you problems when running them for a long period.One major problem is resonances arising from defective or unsuitable elastic coupling.A screwdriver can sometimes hold down such erratic pieces which knock against themselves consequently wearing out each other.When such happens ,it means one should first check the leaks in the pump hoses and replace them if needed then make sure that they are properly seated into their housings and that the seals between them are also good.In case all these do not work,then replacing the pump may be the only option.
Valve and Control Vibrations
One of the Rexroth axial piston pumps may have excessive vibration. This can entail poor performance among other problems or even total breakdowns. The vibration’s causes should be determined in order to diagnose and sort out the problem.
Reasons for extreme vibrations on Rexroth axial piston pumps are faulty valves and controls, worn parts, and wrong part installation. That’s why it is crucial to check all the components of these devices and detect any malfunctioning parts. After identifying the problem, it is high time to put a solution in place.
Please contact our team if you encounter excessive vibrations in your Rexroth axial piston pump. They will identify it for you and give you a solution that will best fit your needs.
Mechanical Damage on Axial Piston Unit
If mechanical damage occurs on your axial piston pump, there are several things that you need to check first. Look for cracks or any damage on both impeller and housing. Check input/output shaft sealing surface for wear or damage. Lastly, make sure that bearings have correct lubrication and fitment; this can be done by simply inspecting them. Any one of these checks may indicate problems which require servicing your pump.
Increased unusual vibration
Any unusual increase in vibration with your Rexroth axial piston pump may signify a problem. To begin with, determine the cause of the vibration. If it is because of defectiveness in the pump, you may have to buy another one. This can be repaired if worn out parts or damage are accountable for the vibrations. Furthermore, if the vibration occurs only once in a while and not commonly, following proper maintenance procedures possibly reduce all or part of it.
No flow or insufficient flow
Axial piston pumps manufactured by Rexroth are reliable and save fuel, although they also fail under different circumstances. When your pump doesn’t seem to be flowing correctly, there are some common tricks you can use to troubleshoot that.
There is inadequate air bleeding at hydraulic system
In case of failures in air bleeding at hydraulic systems one might point towards blocked bleed screw or obstructed bleed screw as one possible reason behind this issue. Besides looking for any obstructors on bleed screw after removing engine cover so as to address this challenge; otherwise one should replace such screws should they not exist.
Incorrect mechanical drive
Mechanical problems sometimes occur with Rexroth axial piston pumps even though they are a dependable and efficient way to move fluids. To help you fix these issues concerning your pump follow through these procedures.
For mechanical problems associated with your Rexroth axial piston pump first check fluid level and seal continuity. If there is an obvious leak, then seals must be replaced immediately. In case seals appear complete yet fluid levels indicate low volumes then it would mean impeller replacement required coupled with drive belt. It may however be necessary to install new pump assembly only when both methods cannot solve the problem correctly
Low drive speed
Drive speed too low, can be a bugbear of Rexroth axial piston pumps. The loss of suction caused by slow drive speeds can result in periodic operation and pose a possible risk of failure. To avoid these problems, see to it that the motor is running at rated speed and ascertain that there is sufficient airflow into the pump.
Inadequate suction conditions
Of course, when Rexroth axial piston pumps have inadequate suction conditions they will not work properly or may even break down completely. This means that the pump would produce either low or no pressure at all thereby potentially damaging the equipment and causing death. To ensure your Rexorth axial piston pump operates effectively follow these four guidelines for troubleshooting insufficient suction conditions:
1.Check Suction Hose Connections: Ensure all hose connections between the pump and the hose are tight and clean. In case any dirt or corrosion exists on those connections, it will prevent air flow hence inadequate suction condition.
2.Check supply line: To check if there is enough air going into the pump, inspect supply line for leaks or blockages. If there is a blockage, you might need to take out whatever item that’s blocking it, then clear it up.
3.Check for Clogs: It may be necessary to inspect impellers/ blades in order to check whether clogs are present in them if nothing improves regarding suction conditions Remove any large foreign materials obstructing them then try running the pumping machine again in order to see if anything changes.
Hydraulic fluid not in optimal viscosity range
There are several variables of the Rexroth axial piston pumps that can affect the viscosity of hydraulic fluid, including temperature, pressure and oil composition. Should the pump fail to fall within optimum range of fluid viscosity; it may not work correctly. Here are some tips on how to troubleshoot a non-working axial piston pump:
1.Check the temperature of the fluid. A very cold fluid will have high viscosity and will therefore not flow well through the pump.
2.Monitor pressure. When it is too high, then fluids would be squeezed out from pistons thereby leading to poor flow through the pumps.
3.Inspecting oil make-up. If it is too dense or has foreign particles inside, then these will block pistons in the pumps and also cause inefficiency in engine power generation.
Insufficient boost pressure
Rexroth axial piston pumps are the most common type of pump used in industry. When low boost pressure is detected, the pump will not move.
There are a number of possible reasons for this problem and luckily, many can be easily solved.
1.The engine may not be supplying enough power to the pump. Inspect if there is sufficient power supply via electric or hydraulic connections from the engine to the pump. You may increase its power when necessary.
2.There might be failure of the gearbox. Determine if there exists any sign of wear and tear like gears that do not align well and excessive play in them. Replace it where needs be.
3.There could be debris or other materials obstructing flow through the pump. Use a plunger or vacuum cleaner to remove any obstructions then recheck for blockage again later on.
Insufficient pilot pressure or control pressure
If Rexroth axial piston pumps do not operate well, then probably it is due to inadequate pilot pressure or control pressure. No fluid can be moved through the pistons by the pump and thus it stops running in case there is insufficient pilot pressure. Even when the pilot pressure exists, if there is an absence of control pressure, a certain setpoint pressure cannot be held by the pump.
It is good to seek help from a qualified technician if you don’t know what could be wrong with your Rexroth axial piston pump.
Malfunction of the control device or controller of the axial piston unit
The industrial and commercial applications frequently utilize the axial piston pumps as they have various advantages when compared to other types of pumps. The axial piston pumps can be highly dependable and productive in particular. However, should there be a failure in the control device or controller of an axial piston unit, then the pump becomes unusable. This article will focus on some of the common problems associated with axial piston pumps and how to take care of them.
Control of the control device defective
If you are having difficulty controlling your Rexroth axial piston pump, it could be as result of a faulty control device. In some instances, all that is required is a new control device. If this does not resolve the issue entirely, other components in the pump may also need checking or changing. Get more information about troubleshooting and fixing common issues with axial-piston pumps from our blog post below.
Wear or mechanical damage to the axial piston unit
Your Rexroth axial piston pump may fail due to malfunctioning in its unit. This article will address some typical wear or mechanical damage hence your axial piston pump becoming ineffective. We shall also explain how these problems can be diagnosed through troubleshooting them out.
Insufficient air bleeding of the hydraulic system
Although the Rexroth axial piston pumps are well known for their dependability and exceptional performance, they cannot operate at their peak if the air bleeding of the hydraulic system is not enough. The purpose of this article is to explain a few common troubleshooting methods used in relation to rexroth axial piston pumps.
1.clogged or restricted air filter; if debris clogs it, air flow will be blocked.
2. line leading to compressor blocked up-this may be because there are debris, oil or a broken line.
3.no pressure in hydraulic system –which can be caused by any broken lines, low oil level or restriction in hydraulic pump.
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Faulty mechanical drive
People like Rexroth axial piston pumps given their level of efficiency and thus are preferred for small and medium sized applications. Nevertheless, they may as well be prone to mechanical breakdowns. In this post we are going to discuss some usual causes of pump failures as well as methods of their elimination.
Inadequate Bearings: Axial piston pump failures are often caused by bearing defects. A badly sealed or lubricated bearing will wear out with time. You can only confirm a bearing failure if there is evidence of tear and wear and upon doing that you will have to replace the bearings.
Faulty Seals: Worn out seals can fail too. If the seal does not have enough lubrication or compression, it ends up leaking oil or gas. To confirm that there is a seal breakdown, you need to check wear at the pump surface; then, you shall replace them in case they turn out bad.
Poor Drive: When the drive system fails, no operation takes place on the pump. So how do we know whether a drive has failed? Just inspect your pump for any damages whereby when spotted you should replace your drive system with another one if it is proved faulty.
Drive power too low
The Rexroth Axial Piston Pumps are one the most reliable pumps sold in the market but at the same time they can be one of the most troublesome. If you find that your Rexroth axial piston pump is not operating at full potential, it might be worthwhile to check whether the power supply has enough energy to juice up the electric motor. If this is not so, you may need to get a new higher voltage supply unit.
Insufficient suction conditions
One of the commonest problems with Rexroth axial piston pumps is a lack of suction. In case there’s no seal formed between your pump and its surroundings, fluids or air won’t be pushed through it. This can happen due to different reasons like blocked filters, clogged filters, inadequate pressure level as well as damaged hoses. For such issues to be detected and resolved, careful examination of your pumps internals will have to be carried out.
Hydraulic fluid not in optimal viscosity range
A hydraulic fluid that doesn’t fall within an optimum viscosity range could indicate failure of a Rexroth axial piston pump. This article discusses troubleshooting steps for hydraulic fluid that does not fall within optimum viscosity range.
Before fixing any problem with a Rexroth axial piston pump it will be wise first to know what’s wrong with them .In order to investigate further and determine more accurately what the problem might be, refer to following symptoms:
1.Check fluid level and flow rate – You should ensure that there is correct amount of oil in your machine’s system and flow rate is normal; otherwise this could mean something went wrong with one or all these factors suggesting pump failure.
2.Inspect impeller and seals – Try checking for cracks which show if either impeller or seal has failed; if need arises replace either impeller or seal right away for quick resolution on this matter.
3.Check rotor – Just look at rotor wear signs, in case they are present then buy new rotor for your axial piston pump to get back its normal operation.
Inadequate charge pressure
A Rexroth axial piston pump can undergo inadequate charge pressure when it is used in high pressure applications. This could be as a result of different factors such as low pump speed, blocked passages and worn parts. To do the trouble shooting regarding this matter, start by checking the pump speed. If the low treating rate is still too low, increase it by increasing the motor windings or gearing. In case these are not being caused by the aforementioned, then a new pump may be needed.
Inadequate pilot or control pressure
Rexroth axial piston pumps are popularly used in industrial and commercial applications due to their reliability as well as production of large volumes at low pressures.
When using a Rexroth axial piston pump ensure that there is enough pilot pressure or control pressure available to keep the pump running smoothly over its lifetime. If there is insufficient either of these pressures, then most likely, the pump will jam or eventually fail.
To prevent this from happening, it would be important to diagnose and fix the problem immediately. By following proper steps you can ensure smooth operation without any problems with your Rexroth axial piston pump.
Malfunction of Axial Piston Unit Control Device or Controller
There are common issues that are experienced with axial piston pumps which are difficult to diagnose. In this section of blog we shall discuss some critical questions about troubleshooting for some of them.
it is important to check if there is enough fluid level in the unit. In case that you find out that fluid level is low then it could be due to an oil leakage or broken pump. When you have noticed an oil leakage use a pressure tester to measure how much amount of oil has gone through into another side where it was not intended for passing through. If no leakages found here you could look for Broken Pump using water test kit (pump). When testing for broken pumps, use a water test kit to check for the resistance of the pump. If the resistance is high, then there may be a broken pump.
In case of a low fluid level and no leak or broken pump, this might imply that the control device or controller of the axial piston unit is not functioning properly. The most common problem with these devices is trouble with wiring or connectors. To check if there are any issues with the wiring or connectors, use voltmeter to measure voltage at different points along the wiring. If there is an issue with voltage, then it can be indicative of
Defective control device control
It is crucial that when you have issues with the Rexroth axial piston pumps, should try to check from the control device. This can be done by unfastening the pump from the control equipment and examining the control unit to identify any defaults. As such, it would be necessary to troubleshoot all these problems and rectify them very quickly.
Axial piston units worn out or mechanically damaged
When faced with wear or mechanical problems on your Rexroth axial piston pump, there are a few things you can do in order to solve this issue. First of all ascertain that it has been installed properly and is also functioning well. If after all this effort, it still doesn’t work correctly then consider replacing axial piston unit.
Defective output unit (e.g. hydraulic motor or cylinder)
It is vital that you trouble-shoot if your Rexroth axial piston pump is failing to work. The cause of an output unit being defective may be as a result of hydraulic motor/cylinder failure. In this blog section we will take a look at some common troubleshooting hints for Rexroth Axial Piston Pumps.
Pressure/flow fluctuations/ instabilities
Rexroth axial piston pumps are commonly used in industrial and commercial applications because they are highly efficient and reliable. However, fluctuations in pressure/flow rate and instabilities can also occur which can lead to reduced performance or even complete breakdown. In this section of my blog, I will discuss some common troubleshooting techniques for Rexroth axial piston pumps.
If your Rexroth axial piston pump is experiencing variations in pressure/flow rate or instability, it is likely to have one of the following problems:
1.One of the most prevalent causes of pressure/flow rate fluctuation or instability is inadequate fluid flow. For instance, if the pump does not get enough fluid from a source such as a tank or pipeline, then the pump cannot maintain consistent flow rate resulting in uneven pressure/flow rates and instabilities. To determine whether your pump has enough fluid flow, you should measure actual flow rates using a flow meter or Pressure Transducer (PT) that displays readings in liters per minute. If its reading is below a minimum value specified by the manufacturer, you will need to boost the amount of fluid supplied to your pump.
2.The impeller as well as bearing may be loose due to poor assembly, causing pressure/flow fluctuations on this type of a pump. It is possible to check for free movement of an impeller/bearing assembly using a Pump Check Tool (PCT). If there exists excessive free play within the assembly, you might require replacing with new ones both impeller and bearing assemblies.3. Unequal currents: The volume of liquid reaching your pump could be more than average but insufficient for normal operations; meaning that it may be diverted away from your pump into other parts of your system.
No Pressure or lack of enough pressure
To troubleshoot a problem with your axial piston pump you must identify the cause. Below are some steps that will help you determine whether it is inadequate pressure or the pump itself.
Hydraulic system air bleeding not sufficient
Axial piston pumps find their use in several industrial as well as commercial applications. This calls for proper engineering and configuration of such systems so that no leakage occurs since these pumps operate using air to move liquids. Some common problems associated with Rexroth axial piston pump troubleshooting and how to solve them are discussed in this article.
Insufficient suction conditions.
Rexroth axial piston pumps are reliable and efficient machines, but they can also have insufficient suction conditions. When this happens, the pump will not be able to move fluid or air through the impeller. This problem manifests as reduced flow rates, lower power output, and reduced efficiency. Here are some clues that a lack of suction might be causing your problem:
1.Check if there is a suffocation level sensor. When the pressure in the system goes below minimum acceptable level, it triggers an alarm via a sensor. It may mean you have clogs either in the line or impeller assembly.
2.Find out if all filters and pipes are jammed with dirt that accumulates on the impeller or inside the pump body obstructing air/fluid path; wash these places when necessary to restore normal functioning.
3.Inspect lines and connecters for any damage caused by falling off of hoses or breaking of fittings which can create inadequate suction conditions; such components should always be exchanged once they get spoilt for one reason or another.
Valve and controller shake
For instance, if you are having problems with your Rexroth Piston Pumps vibrating, then likely it is the valve or the controller causing such. Here are steps to follow in order to troubleshoot and correct this problem:
1.Check for intact seals on both the pump body as well as the valve itself. If there is no seal, debris may enter into the pump resulting into vibrations.
2.Ensure that the valve is properly seated in the pump body; it should be flush with both ends of the pump body. If it’s not, apply a small amount of oil onto threads of a valve and screw it until it fits snugly inside. Be careful not to over-lubricate; this will result to excessive wear on both pump body and valve.
3.Examine controller for any damage or worn out parts, then replace as part of a major overhaul project if necessary.
Unstable control signal
The problem may lie in the control signal when your Rexroth axial piston pump does not function as it should. Detecting and resolving the issue can be done through these steps:
1.Look at the connections to the controller. You should ensure that you have secured all wired connections to the controller board tightly, and that no metal edges are exposed on the connectors.
2.Check for soundness of power supply connection. Ensure that there is enough power supplied by a power source to a pump controller. For external power supply make sure it is correctly connected into an outlet and linked with pump controller via a wire.
3.Scan for anomalies or deterioration in control signals. If you are employing an external sensor, ascertain that it has been well installed without interfering with other electrical components in your system while checking whether any damaged or broken wires exist near this sensor if using a built-in one.
4.Switch off both power and communications to the pump unit while resetting the pump controller then reconnect all cables before switching on power again. Once reset test if the problem is still there then try running a unit’s test on your pump .
Control devices or controller malfunction.
Many are the causes of a Rexroth axial piston pump failure. When operating fails, check on these:
1.Control devices, ensure that they are appropriately connected and functional; if the pumps are belt-driven, ensure that the belt is in sound condition and with correct tension.
2.Controller; If it is motor driven pump, see to it that it is well plugged into the power source and also batteries fully charged.
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High hydraulic fluid and housing temperature that is too high.
In various industries, Rexroth axial piston pumps are used to move hydraulic fluid from one place to another. These pumps can operate at high temperatures and when the temperature of the hydraulic fluid exceeds a limit, it acts as the cause of damage for both the pump and housing. This post will help you understand some Rexroth axial piston pumps’ problems as well as their solutions.
When your Rexroth axial piston pump stops functioning; one of the first things you will notice is that its hydraulic fluid is extremely high in temperature. Some of these causes can include; clogged or worn out filters, damaged or obstructed impeller blades and bad heat exchangers. In case simple diagnostic techniques fail, it may be necessary to replace either the entire unit or just the casing.
If your pump has been running hot, it’s important to make sure all components are working correctly. You can do this by checking for leaks and verifying that the impeller is turning freely. Replacement of a pump or housing may be necessary if any of these tests prove negative.”
Axial piston unit with high inlet temperature
When you come across Rexroth axial piston pump and the inlet temperatures are excessively high, this means that it has a problem. The following should help:
1.Confirm if there is adequate flowrate at the axial piston pump’s inlet; when it becomes low, the pump will be forced to work at higher RPMs which leads to an increase in inlet temperature.
2. Check if the thermal protection system (TPS) for any signs of wear. If it is significantly worn or damaged, this might hinder its ability to dissipate heat efficiently contributing to increased inlet temperatures.
3. Always make sure that the air flow around the axial piston pump does not get clogged or obstructed in any way possible since this may result into overheating and should be acted upon without delay.
Incorrect setup and/or malfunctioning of pressure relief and pressure control valves.
Rexroth axial piston pumps are an option that is dependable and efficient for many applications. However, it may experience problems when they have not been set properly or when there is a problem with the two pressure limitation and pressure control valves. We will discuss some common troubleshooting tips for Rexroth axial piston pumps in this blog post.
The flushing flow in the flushing valve is low
In case the flow in the flush valve is low, it can cause blockage of the pump. To troubleshoot this problem, follow these steps:
1.Check to ensure that the flushing valve works properly by opening it up fully to fit against the pump body as well as replacing it if it seems to be not functioning anymore.
2.Ensure adequacy of pump flow. For proper flow rate of its stream check on manufacturer’s specifications for your pump. You’ll need to increase this if your pump has insufficient flow by either changing its impeller orifice to a bigger size with one having more capacity or putting in place a discharge pipe which is larger than before.
3.Examine discharge tubes and pipes as they can become clogged. Use vacuum cleaner clearing tip alternatively plunger should clear any blockages found herein replace faulty components where deemed necessary
Worn out axial piston unit
When you have any problems with your Rexroth axial piston pump, there are some things you can do in order to troubleshoot the problem.
1. Ensure that the pump is adequately installed and the seals are in good condition. There will be no effective fluid movement if the seals do not work properly.
2.Ensure adequate flow of fluid. With low fluid flows, pumps pistons may not move fluid well.
3.Ensure that there is proper power supply; otherwise, it could lead pump into inability to generate required force for operation.
Summarize
Rexroth axial piston pumps can be trusted on and they are very efficient, although sometimes they may fail. For trouble shooting Rexroth axial piston pumps , it is of great value to identify the problem first and then take appropriate steps to alter it.
Related Reading：
Hydraulic Piston Pump Troubleshooting
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