All lines must be of proper size and free of restrictive bends. The p series pumps normally will not require servicing during the life of the vehicle in which it is. Hydraulic pump troubleshooting guide no oil flow from pump. This manual includes the pump s general descriptions, hydraulic schematics, technical specifications, servicing and troubleshooting procedures for the pumps.
For pj trailers with 10,000 lbs to 12,000 lbs axles. Eaton has the perfect pump for the most demanding hydraulic applications, in a variety of sizes and operation pressures. Adobe acrobat reader, or a similar pdf viewer is required to view pdf files. Each component in the system must be compatible with and form an integral part of the system. Hydraulic gear pump and motor failure analysis and repair. Troubleshooting tips for hydraulic pumps womack machine supply. Sumitomo sh2903 hydraulic excavator service repair manual. Hydraulic pump repair, rebuild, remanufactuing, oem parts. Remember that aeration and cavitation produce different sounds. Check all components, particularly the relief valve for proper settings. This factory service repair manual offers all the service and repair information about sumitomo sh2903 hydraulic excavator. Developing useful mathematical models for fluid power. Pressures to 35 bar 500 psi temperatures to 350c 650f speeds to 1800 rpm.
If you dont detect it, theres a good chance the problem is elsewhere. We will introduce many aspects of troubleshooting hydraulic systems and will share information that will help you to better understand and enhance the operation of. Hydraulic pumps displace fluid volume against a resistant load or pressure. System components product specification sheet hpto hydraulic gear pump spline shaft, type r. If your hydraulic layout is suffering from any issues, make sure to check your hydraulic gear pumps and other components. All hydrogear products can be identified by the label attached to the product depicting the model and serial number. Installation and service manual hydraulic landing gear installation and service manual medical trailer leveling system tip sheet. These reliable, highefficiency pumps can provide a continuous, smooth flow. Troubleshooting tips for hydraulic systems download data sheet this data sheet describes a stepbystep checkout procedure for hydraulic systems which have previously been working satisfactorily but which have developed trouble, usually over a 24hour working period, which renders them inoperative. They are suited for use in log splitters and other applications, such as.
Gear and vane pumps which are pulling suction oil from a reservoir located below them, will have a slight vacuum behind the shaft seal. A pistontype pump is always used in a hydrostatic system. Advanced fluid systems features hydraulic system tools and resources for. Cavitation is recognized by excessive noise and foaming of hydraulic fluid. Lubricate and place new oring item 11 on the gear pump. Try this simple tip before you blame your gear pump for.
Gear pump gear pump basics well pump gear reducer hydraulic gear pump flexible impeller pump vs centrifugal pump fire pump jockey pump gear s how to gear oil sae 90 sun gear nit gear box gear gear s2 gear box design biology gear up gear up class 11 steering gear gadgets and gear ffg racing car gear box couple in gear pdf design gear. Condition likely cause correction muncie power products. Before disconnecting the lines, clean port areas of pump. The image to the right shows a cutaway view of a three section gear pump. Hydraulic gear and piston pumps for tipping and less demanding applications hyva offers a wide range of gear pumps. Alfa laval solutions to specific centrifugal pump problems 31 how alfa laval can provide solutions to specific pump problems. Jack weeks is a consultant with gpm hydraulic consulting, monroe, ga. Positive displacement pumps allow liquid to flow into an open cavity trap the liquid in the pump transport liquid from the suction to discharge port mechanically force liquid out of the pump. Demonstrative drawing of the pz2 type gear pump structure. The correct way to test the hydro system would be use a bidirectional flow meter. They are the ideal choice for a wide range of applications from small to medium and large offhighway vehicles, as well as for industrial applications.
This is done by the movement of fluid through the transmission pipeline. In any troubleshooting situation, no matter how simple or complex the hydraulic system, always start with the basics. The larger pump of the combination is situated at the shaft end the drive side. Find popular gear pump lines brought to you by major. The new pump is delivering a maximum pressure of 1,000 psi and appears to be creating heat. Qx double pumps consits of two single pumps mounted on a common drive shaft. Series 26 model 26000 multiple gear pump disassembly repair information model 26000 work in a clean area. Stuffing box accommodates packing or mechanical seals.
The etensifier represents new technology introduced by three industry leaders patent protected motors and controls from graco, proven hydraulic pumps from sprague and high pressure components and customer service from. Now theres a high pressure hydraulic pump system that simply plugs into a wall outlet and doesnt require an air compressor. Criterial quantities providing the wear symptoms identification of tested pumps, were separated during the pump characteristics empirically obtained analysis. The hydraulic hand pump is a handheld hydraulic sealant injection pump that is rated to 10,000 psi and operates in any position. Highperformance hydraulic gear pumps from grainger can convert mechanical power into hydraulic energy to help run industrialgrade hydraulic systems. The following hydraulic connection recommendations are important for optimum pump efficiency and extended motor seal life. Troubleshooting hydraulic system information tilt cylinder lift cylinder steering cylinder hydraulic control valve 1 series hydraulic control valve 12000 series bucket position valve hydraulic pump 1 series hydraulic pump 12000 series port block hydraulic valve control handle steering control valve hydraulic reservoir priority valve. The following troubleshooting guides cover five categories of hydraulic problems. Apr 11, 2014 pg330 pg331 tutorial01 cast iron gear pump salami spa duration. So, whenever you detect insufficient pressure in a gear pump driven hydraulic system, check the pump body for instant overheating. Bobcat 2400 service repair manual loader 6720455 590. P series hydrostatic pumps service and repair manual.
Try this simple tip before you blame your gear pump for system failure dont assume you need to replace your gear pump until youve tried this one simple test. L2550 hydraulic power steering pump failure, pump opened to show damage. Hydraulic gear pump and motor failure analysis and repair guide page 2 of 32 alamo industrial 1502 e walnut st, seguin, tx 78155. Piston pump hydraulic system page 4 54 greensmaster 3150. When troubleshooting hydraulic pump problems, make the visual and sound checks first, as these are the easiest to do. In such cases there are provided some gear pump for charging of raw material viscosity varies from 100 cp to cp and also with season viscosity vary of similar raw materials. At initial startup, turn the drive shaft several times by hand to prime. The tank, valves and cylinders were cleaned and a replacement pump installed. Hydraulics gear pump hydraulic power pack manufacturer. If your system is suffering from any of these symptoms, then that could be a clear sign that you need to repair, clean, or replace parts of your system. It should never be changed before several tests are conducted.
Overview of pump problems typically found on centrifugal pumps. An undersized or restricted line results in a pressure drop in the line itself. View and download mitsubishi mt160 repair manual online. Many times you can determine the cause of the problem before the first wrench is turned. The pump volume can range from zero to the maximum amount. If you do see the pump heat up instantly you just found your culprit, and it took you but a couple of minutes. Measure the longest diameter of the elliptical bore l. Measure bore diameter of one of the gear chambers d. Troubleshooting tips for hydraulic pumps womack machine.
When troubleshooting an internal gear pump or any other pump for that matter, develop a clear, concise, and objective statement of the problem. Try to set preconceived ideas of what could be wrong aside and base your statement on facts that are accurate and unbiased. We can see the gear sets for all three sections and the input drive shaft. Pg330 pg331 tutorial01 cast iron gear pump salami spa duration. Disconnect hydraulic lines, removing pump assembly from vehicle and plugging ports. For example, an inadequate size filter on the inlet of a pump can cause cavitation and subsequent damage to the pump. Because a pump is the most timeconsuming part to replace and the most expensive. The swashplate is moved by two internal cylinders, which are controlled by a separate valve or manual lever. Last year i received a troubleshooting call from a paper mill in wisconsin where one of the pressure compensating pumps had been changed because it would not build and maintain pressure. Centrifugal pumps use an impeller and volute to create the partial vacuum and discharge pressure. They can either be plumbed just to the pump to test the pump or they can be plumbed inline between the pump and wheel motor to test both at the same time. Double acting cylinder piston seals are cut or worn out 1.
Ph series gear pumps and motors is an evolution of the polaris series. It is very portable making it easy to keep one in your pickup for quick topups and. Internal gear pumps qxv low viskose metering pump qxp. Troubleshooting tips for hydraulic pumps download data sheet the pump is probably the component most subject to wear in a hydraulic system, and the one most likely to cause a sudden or gradual failure in the system. Speak with live rep or call our professional team at flowfit. Models 1012, 1053 and 1056 concentric oipm pn 2690165. Hydraulic system troubleshooting 45 conversion tables 48 hydraulic oil and filtration 38. Toro greensmaster 3150 service manual pdf download. The main function of the hydraulic pump is to apply force at one point that is transmitted to another point. Fixed displacement, external gear pump designed for medium pressure applications.
By incorporating a gear pump in place of a hand piston pump, we increase oil flow to the cylinder which will increase the actuation rate of the ram. Hydraulic pumpmotor division hydraulic flow is developed as the pump rotating group is driven by a prime mover hydraulic pump basics fluid is forced out of pump at the pump outlet a partial vacuum is created at the pump inlet and atmospheric pressure forces fluid into pump from the reservoir. Can you suggest some tips to find a solution to this problem. Some components must be mounted in a specific position with respect to other components or the lines.
Hydraulic gear pump and motor failure analysis and repair guide. As manufacturer of hydraulic power packs and hydraulic cartridge valves,we know how gear pump important it is to a hydraulic power unit system. Install pressure gauge and adjust to correct valve setting pressure. For repair of the gear pump, see eaton gear pumps, repair information, series 26, model 26000, multiple gear pumps at the end of this chapter. Polaris ph has a new body made of cast iron to have higher operating parameters and keep the full polaris versatility regarding shafts, flanges, ports and builtin valves. Remove oring from between the gear pump and hydrostat.
Hydraulic pumps fixed displacement pumps the gpm of the fixed displacement pump can not be varied. When using the assembly as a pump keep inlet hose short and of adequate size to avoid pump cavitation. Hydraulic pumps transmit mechanical energy into hydraulic energy to drive machinery. A horizontal, doublesuction pump may be fitted with a 90deg elbow mounted on the suction nozzle in such a way that the line leading to the elbow is parallel with the axis of the pump shaft see figure 1. Position gear pump to the piston pump so that the pump inlet is. Pressurebalanced design, ensuring sealing pressure, adapts automatically to operating conditions for improved overall efficiency and minimum energy losses.
Understanding and troubleshooting hydrostatic systems. The gear pump failure states, that occurred most often, were identified in chapter 3. Hydraulic gear and piston pumps hyva we move your world. For high pressure and long continuous operation, hyva strongly recommends a high performance and high efficiency hyva piston pump. Speed hydraulics has a great range of gear pumps for both mobile and industrial market segments.
Relief valves and fixed displacement pumps provides a flow path for the pump volume back to tank. Because of this, the following points should be considered. This pump troubleshooting guide can help with your common pumping concerns. Tork hydraulics today, in the modern and industrial world, manufactures, including large and small ones, prefer to use high quality. Understanding the cause and remedy of your pump issue, along with some simple preventative steps, you can get back on track with smooth hydraulic metering pump operation. Hi, in plant some of the raw materials we have to charge through barrels and pump into reactorvessel. In figure 2, the pump swashplate is in the vertical position, which means the pump output is zero gallons per minute gpm.
Pdf study of failure in hydraulic systems researchgate. Possible causes and remedies are listed for each type of trouble. Hydraulic troubleshooting is one of our specialties here at bernell hydraulics. Check system relief valve for proper setting with pressure gauge in outlet line 2. Hydraulic systems for these machines typically use gear pumps for powering hydraulic systems. Troubleshooting guide continued troubleshooting guide part 2 problem possible cause corrective action rapid pump wear abrasives in fluid install suction strainer. Troubleshooting and preventive maintenance of hydraulic. View and download rexroth a4vg repair manual online. Download complete service repair manual for sumitomo sh2903 hydraulic excavator. The propeller can be driven directly by a sealed motor in the tube or by a right angle drive. Centrifugal pumps develop pressure by increasing the velocity of the liquid liquid is literally flung out of the cutwater.
Hydraulic system troubleshooting advanced fluid systems. Reusable parts of komatsu hydraulic gear pumps heavy equipment. Hydraulic fluid is drawn into the input port of the pump and discharged from the output port. When the new pump also did not build pressure, the manual valve in the outlet line was closed to isolate the pump from the system. Eaton delivers unmatched functionality and durability for both industrial and mobile systems with one of the most extensive offerings of hydraulic pumps on the market. Following the pump mounting guidelines will insure proper priming of the pump and avoid premature seal failure.
Hydraulic gear pump was suppose offer hydraulic fluid pressure to hydraulic cylinders or hydraulic motors. Dowty dynamatics, dowty pumps, hydraulic gear pump. High precision hydraulic gear pumps are available in flow rating from 0. You will need this information when asking for specific assistance with service andor repair needs. We can provide gear pump hydraulic fluid displacement from 0. Gear pump hydraulic schematic figure 1 figure 2 dimensions description our two stage, hilow, external gear hydraulic pumps, models 1012, 1053 and 1056, are designed to be directdriven by gas engines or electric motors.
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