priming tractor hydraulic pump supplier

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The gear pump is a PD (Positive displacement) pump. It helps to develop a flow by carrying the fluid between repeatedly enclosing interlocking gears or cogs, transferring it automatically using a cyclical pumping action. So, the Gear pump provides a smooth pulseless fluid flow of which rate depends on its gears’ rotational speed.

The gear pump uses the rotating gears or cogs’ action to move fluids. Its rotating part forms a fluid seal by the casing of the pump and creates the suction at the inlet of the gear pump. Fluid pulled into a gear pump is surrounded within the rotating gears or cogs cavities and shifted out to discharge.

External design Gear pump contains two identical and interlocking gears that are supported through separate shafts. The motor is used to drive the first gear which drives the second gear. In a few cases, electrical motors can drive both shafts that are supported with bearings on every side of the casing.When gears move out from the mesh on the pump’s inlet side, they form an extended volume, Fluid flows into the pump’s cavities and entrapped by the edges of gear while gears carry on rotating against the casing of the pump.

The fluid cannot be transferred back over the center, amongst the gears, as they got connected. Close tolerances amongst the casing and the gears let the external gear pump to extend suction over the inlet and prohibit fluid from going back from the pump’s discharge side (Though the low viscosity fluids have more tendency for fluid leakage).

The Internal Design Gear Pump works the same as of External Design Gear Pump except that it’s both interconnected gears have different sizes where one rotates inside of others. It has a larger internal gear which is called the rotor i.e. its edges projecting from the inside. The other external gear of small size mounted into the center of the rotor which is called the idler. It is designed for interconnecting with the outer rotor in a way that edges of gear engage at the one end. The bushing along with a pinion is attached to the casing of the pump which holds inner idle into its location. A crescent shape fixed divider fills the vacant place which is created by the idler’s irregular mounting position. It works like the seal amongst outlet & inlet ports.When gears move out from the mesh on the pump’s inlet side, they form an extended volume, fluid flows into the pump’s cavities, and entrapped by the edges of gear while gears carry on rotating against the partition and casing of the pump.

The gear pump has few moving parts and is very simple and compact. Its pressure power cannot be matched with reciprocating pumps or the rates of flow of the centrifugal pumps. Yet it provides higher throughputs and pressures than lobe pumps or vanes. The gear pump is specifically suitable for fluids of high viscosity and pumping oils.

From the two types of gear pump, the external design has the ability to sustain high flow rates and pressures (more than 3000psi) due to its closer tolerances and stronger shaft support. Internal design provides better suction. It is suitable for fluids of high viscosity but it provides an operating range of 1cp to more than 1,000,000cp. As output depends on the rotational speed, the gear pump is mostly used for blending and metering operations. The gear pump can also be engineered for handling the aggressive liquids. Whereas it is generally made from stainless steel or cast iron, new composites and alloys let the pump handle the corrosive fluids like sodium hypochlorite, sulphuric acid, sodium hydroxide, and ferric chloride.

The external design can be used in lifting machinery, hydraulic power, plant equipment, and vehicles. When the gear pump is driven in reverse, by using the oil which can be pumped from anywhere in the system (generally through a tandem pump within an engine), creates the hydraulic motor. It can be beneficial for providing power in those fields where the electrical system is costly, inconvenient, or bulky. For example, a tractor depends on an external design engine-driven gear pump to power its services.

The gear pump is self-priming yet it can also dry lift, though its priming features can be enhanced by wetting the gears. The gears should not run dry for a prolonged period and must be lubricated through a pumped fluid. Some designs of gear pumps can be operated in both directions (forward or reverse). Since the same gear pump can be utilized for loading and unloading the vessel, for instance.

Close tolerance amongst the casing and gear means that this pump type is vulnerable to wear especially when feeds consisting of entrained solids or the abrasive fluids are used. Though, few pump designs, specifically internal variants that let to handle the solids as well. The external design gear pump has four bearings with tight tolerances. Therefore, it is less suitable to handle abrasive fluids. The internal design gear pump is more robust and has just one bearing (maybe two) to run in a fluid. The gear pump needs to install a strainer on a suction side that can protect it from potential damages of solids.

In general, when a gear pump requires for handling abrasive solids then it’s better to choose a pump with higher capacity that can be run at low speed to avoid wear. But it must keep in mind that the gear pump’s volumetric efficiency becomes lessens at low flow rates and speeds. The gear pump must not be run beyond the recommended speed.

In applications of high temperature, it’s necessary to make sure that an operating range of temperature is compatible along with the specification of the pump. Gears and casings’ thermal expansion lessens clearances in the pump which can lead towards increased wear as well as in extreme circumstances, pump failure.

In spite of the best precautions, the bearings, casing, and gears of the pump succumb to wearing with every passing day. As there is an increase in clearances, a gradual decrease in efficiency happens along with an increase in the flow slip: pumped fluid’ leakage from the expulsion back towards a suction side. The flow slip depends on the clearance’ cube between the casing and cog edge so, practically, wear provide a small impact till a critical stage is reached after which the performance of the pump degrades rapidly.

Gear pumps continue to pump in contrary to reverse pressure then, if downstream blockage happens, it will carry on to the pressurized system till the pipework, pump, or other parts fails. Due to this reason, some gear pumps are used to equip with the relief valves. It’s advisable to use a relief valve anywhere within a system for protecting the downstream equipment.

The internal designs gear pumps that operated at less speed are considered ideal for the shear-sensitive fluids like paint, soaps, and foodstuffs. The lower clearances and higher speeds of eternal design gears make them appropriate for these kinds of applications. The internal design gear pump also prefers where hygiene conditions are more important due to its mechanical simplicity. This is a fact that it has easy to clean, strip down, and reassemble features.

Gear pumps are appropriate for pumping the fluids of high viscosity like foodstuff, oil, paints, or resins. They are used in any kind of application where the output of high pressure or accurate dosing is required. The gear pump output is not affected too much by pressure and they can be used in any type of situation where irregular supply occurs.

The gear pump helps to develop a flow by carrying the fluid between repeatedly enclosing interlocking gears or cogs, transferring it automatically to smooth pulseless flow of which rate depends on its gears’ rotational speed. Two basic design types of gear pumps are external design and internal design.

External design Gear pump contains two identical and interlocking gears that are supported through separate shafts. The Internal Design Gear Pump has two interconnected gears having different sizes where one rotates inside of others.

Gear pumps are appropriate for pumping the fluids of high viscosity like foodstuff, oil, paints, or resins. They are used in any kind of application where the output of high pressure or accurate dosing is required. The external design gear pump is used to sustain high pressure (more than 7500 psi) while the internal design gear pump provides better suction and is more suitable to fluids which are shear sensitive and of high viscosity.

PRIME GUARD Premium Tractor Hydraulic Fluid is a high quality, specially designed lubricant containing anti-rust, anti-foam and oxidation inhibitors; plus, other additives necessary for the wide range of applications recommended by various tractor manufacturers. This product resists thickening in cold weather and thinning in the heat of the summer. It is compounded with detergents to keep transmissions clean and maintain hydraulic control circuits in perfect working condition; and provides excellent protection against seal and pump deterioration.

Long story but a good friend lost all hydraulic pressure after cleaning the filter screen on his Mahindra tractor. We felt certain the pump had lost prime so I did a little searching on the net to see what type of fix I might find. Ran across an easy method of using a air hose to pressurize the fluid reservoir in the transmission since the transmission fluid drives the hydraulics as well. Worked like a charm. Not a lot of pressure needed and it�s a fix that works on any tractor with an external pump.

I had to remove the return line going to pump, now i have air in it, i tried to prime the pump but it will not pick up the prime, the return line is about 30 "how do i get this line full, or is there another way to prime sys. and bleed the air out of it.PLESE HELP i don;t want to haul it 30 miles to dealer.buckjones@aol.com

1999-09-23 8220Make sure there is plenty of oil in the transmission! Then try either jacking up the rear of the tractor or,even better, backing up a steep hill. The pump should prime itself. If it is still not picking up the oil, don"t keep running the tractor or the pump will sieze up.

1999-09-24 8254Bob. If possible loosen a discharge hose or connection. Let air bleed out of pumps until hydraulic fluid is discharged. The pump is air bound.

During my two decades working in the hydraulics industry, I’ve been in the fortunate position of being able to observe, and learn from, the mistakes and omissions hydraulics users make when maintaining their equipment.

There are only two conditions that mandate a hydraulic oil change: degradation of the base oil or depletion of the additive package. Because there are so many variables that determine the rate at which oil degrades and additives get used up, changing hydraulic oil based on hours in service, without any reference to the actual condition of the oil, is like shooting in the dark.

Given the current high price of oil, dumping oil which doesn’t need to be changed is the last thing you want to do. On the other hand, if you continue to operate with the base oil degraded or additives depleted, you compromise the service life of every other component in the hydraulic system. The only way to know when the oil needs to be changed is through oil analysis.

A similar situation applies to hydraulic filters. If you change them based on schedule, you’re changing them either too early or too late. If you change them early, before all their dirt-holding capacity is used up, you’re wasting money on unnecessary filter changes. If you change them late, after the filter has gone on bypass, the increase in particles in the oil quietly reduces the service life of every component in the hydraulic system – costing a lot more in the long run.

Few equipment owners or operators continue to operate an engine that is overheating. Unfortunately, the same cannot be said when the hydraulic system gets too hot. But like an engine, the fastest way to destroy hydraulic components, seals, hoses and the oil itself is high-temperature operation.

How hot is too hot for a hydraulic system? It depends mainly on the viscosity and viscosity index (rate of change in viscosity with temperature) of the oil, and the type of hydraulic components in the system.

As the oil’s temperature increases, its viscosity decreases. Therefore, a hydraulic system is operating too hot when it reaches the temperature at which oil viscosity falls below that required for adequate lubrication.

A vane pump requires a higher minimum viscosity than a piston pump, for example. This is why the type of components used in the system also influences its safe maximum operating temperature.

Apart from the issue of adequate lubrication, the importance of which cannot be overstated, operating temperatures above 82 degrees Celsius damage most seal and hose compounds and accelerate degradation of the oil. But for the reasons already explained, a hydraulic system can be running too hot well below this temperature.

The oil is the most important component of any hydraulic system. Not only is hydraulic oil a lubricant, it is also the means by which power is transferred throughout the hydraulic system. It’s this dual role which makes viscosity the most important property of the oil, because it affects both machine performance and service life.

Oil viscosity largely determines the maximum and minimum oil temperatures within which the hydraulic system can safely operate. If you use oil with a viscosity that’s too high for the climate in which the machine must operate, the oil won’t flow properly or lubricate adequately during cold start.

And despite what you might think, you won’t necessarily get the correct viscosity oil by blindly following the blanket recommendations of the machine manufacturer. How Do You Know if You"re Using the Right Hydraulic Oil? will provide you with additional information about choosing the right oil.

Any filter is a good filter, right? Wrong! There are two hydraulic filter locations that do more harm than good and can rapidly destroy the very components they were installed to protect. These filter locations which should be avoided are the pump inlet and drain lines from the housings of piston pumps and motors.

This contradicts conventional wisdom: that it is necessary to have a strainer on the pump inlet to protect it from "trash". First, the pump draws its oil from a dedicated reservoir, not a garbage can. Second, if you believe it’s normal or acceptable for trash to get into the hydraulic tank, then you’re probably wasting your time reading this article.

If getting maximum pump life is your primary concern (and it should be), then it"s far more important for the oil to freely and completely fill the pumping chambers during every intake than it is to protect the pump from nuts, bolts and 9/16-inch combination spanners.

Research has shown that a restricted intake can reduce the service life of a gear pump by 56 percent. And, it’s worse for vane and piston pumps because these designs are less able to withstand the vacuum-induced forces caused by a restricted intake. Hydraulic pumps are not designed to "suck".

A different set of problems arises from filters installed on the drain lines of piston pumps and motors, but the result is the same as suction strainers. They can reduce service life and cause catastrophic failures in these high-priced components. You"ll want to read Hydraulic Filter Location Pros and Cons before addressing this.

You wouldn’t start an engine without oil in the crankcase – not knowingly, anyway. And yet, I’ve seen the same thing happen to a lot of high-priced hydraulic components.

The fact is, if the right steps aren’t followed during initial start-up, hydraulic components can be seriously damaged. In some cases, they may work OK for a while, but the harm incurred at start-up then dooms them to premature failure.

You can’t pat yourself on the back for filling the pump housing with clean oil when you forgot to open the intake isolation valve before starting the engine!

The purpose of this article is to show that if you own, operate, repair or maintain hydraulic equipment and you aren’t aware of the latest hydraulic equipment maintenance practices, a lot of money can slip through your fingers.

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.

Pump trouble is usually characterized by increased noise, increased heat, erratic operation of cylinders, difficulty or inability to develop full output, decreased speed of cylinders or hydraulic motors, or failure of the system to work at all.

Cavitation is the inability of a pump to draw in a full charge of oil. When a pump starts to cavitate its noise level increases, and it may become extremely hot around the shaft and front bearing. Other symptoms of pump cavitation are erratic movement of cylinders, difficulty in building up full pressure, and a milky appearance of the oil. If cavitation is suspected, check these points:

a. Check condition of pump suction strainer. Clean it even if it does not look dirty. Use a solvent then blow dry with an air hose. Varnish deposited in the wire mesh may be restricting the oil flow but may be almost invisible. If you find varnish deposits on internal surfaces of pumps or valves, the system is operating at too high a temperature. A heat exchanger should be added.

b. Check for restricted or clogged pump inlet plumbing. If hoses are used, be sure they are not collapsed. Only those hoses designed for vacuum should be used in the pump inlet. They have an internal wire spiral to prevent collapse.

c. Be sure the air breather on top of the reservoir is not clogged with lint or dirt. On systems where the air volume above the oil is relatively small, the pump could cavitate during its extension stroke if the breather became clogged.

d. Oil viscosity could "be too high for the particular pump. Some pumps cannot pick up the prime on heavy oil or will run in a partially cavitated condition.

Cold weather start-up is particularly damaging to a pump. Running a pump for several hours in a cavitated condition until the oil warms up can greatly shorten its life. On equipment operating outdoors use an oil not only of the recommended viscosity but also with as high as possible viscosity index. This minimizes the viscosity change from cold to hot oil operation and reduces cavitation on a cold start-up.

g. Determine recommended speed of pump. Check pulley and gear ratios. Be sure the original electric motor has not been replaced with one which runs at a higher speed.

h. Be sure pump has not been replaced with one which delivers a higher flow which might overload the suction strainer. Increase suction strainer size if necessary.

a. Be sure the oil reserve is filled to Its normal level, and that the pump intake is well below the minimum oil level. The NFPA reservoir specifications call for the highest point on the suction strainer to be at least 3 inches below minimum oil level.

b. Air may be entering around the pump shaft seal. Gear and vane pumps which are pulling suction oil from a reservoir located below them, will have a slight vacuum behind the shaft seal. When this seal becomes badly worn, air may enter through the worn seal. Piston pumps usually have a small positive pressure, up to 15 PSI, behind the shaft seal. Air is unlikely to enter these pumps through the seal.

c. Check all plumbing and joints in the pump inlet line, especially unions. Check for leaks in hoses used in· the inlet line. One easy way to check for plumbing leaks is to pour oil over a suspected leak. If the pump noise diminishes, you have found your leak.

a. Leakage Around the Shaft. On some pumps (piston pumps or those pumps operating with an overhead reservoir), there may be a slight pressure behind the shaft seal. As the seal becomes well worn, external leakage may appear. This will usually be more pronounced while the pump is running, and may disappear while the pump is stopped.

b. Leakage Around a Pump Port. Sometimes leakage at these ports is caused from screwing a taper pipe thread fitting into a straight thread port. Once the threads have been damaged there is no easy way to repair the pump.

Check tightness of fittings in the ports. If dryseal pipe threads are used, there should be no need to use a pipe thread sealant. Beware of screwing taper pipe threads too tightly into a pump body casting. This may cause the casting to crack.

c. If leakage is from a small crack in the body casting, this most likely has been caused either by screwing a pipe fitting in too tightly, or from operating the pump in a system where either the relief valve is set too high, or where high transient pressure spikes are generated as a result of shocks. It is possible that the casting may originally have been defective but this has rarely turned out to be the problem.

a. Shaft turning in wrong direction. Shut down immediately. Reversed leads on a 3-phase motor are the commonest cause for wrong rotation. Pumps must be run in the direction marked on their nameplate or case.

g. Pump running too slow. Most pumps deliver a flow at all speeds, proportional to RPM. But some vane pumps which depend on centrifugal force to extend the vanes, will deliver little or no flow at slow speeds such as engine idle RPM.

f. Misalignment of pump shaft with driving motor or engine. Note: When replacing a foot mounted pump, leave the bracket and replace only the pump and the new pump will not have to be re-aligned with the driving source.

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A gear pump is a type of positive displacement (PD) pump. Gear pumps use the actions of rotating cogs or gears to transfer fluids. The rotating gears develop a liquid seal with the pump casing and create a vacuum at the pump inlet. Fluid, drawn into the pump, is enclosed within the cavities of the rotating gears and transferred to the discharge. A gear pump delivers a smooth pulse-free flow proportional to the rotational speed of its gears.

There are two basic designs of gear pump: internal and external (Figure 1). An internal gear pump has two interlocking gears of different sizes with one rotating inside the other. An external gear pump consists of two identical, interlocking gears supported by separate shafts. Generally, one gear is driven by a motor and this drives the other gear (the idler). In some cases, both shafts may be driven by motors. The shafts are supported by bearings on each side of the casing.

As the gears come out of mesh on the inlet side of the pump, they create an expanded volume. Liquid flows into the cavities and is trapped by the gear teeth as the gears continue to rotate against the pump casing.

No fluid is transferred back through the centre, between the gears, because they are interlocked. Close tolerances between the gears and the casing allow the pump to develop suction at the inlet and prevent fluid from leaking back from the discharge side (although leakage is more likely with low viscosity liquids).

External gear pump designs can utilise spur, helical or herringbone gears (Figure 3). A helical gear design can reduce pump noise and vibration because the teeth engage and disengage gradually throughout the rotation. However, it is important to balance axial forces resulting from the helical gear teeth and this can be achieved by mounting two sets of ‘mirrored’ helical gears together or by using a v-shaped, herringbone pattern. With this design, the axial forces produced by each half of the gear cancel out. Spur gears have the advantage that they can be run at very high speed and are easier to manufacture.

Gear pumps are compact and simple with a limited number of moving parts. They are unable to match the pressure generated by reciprocating pumps or the flow rates of centrifugal pumps but offer higher pressures and throughputs than vane or lobe pumps. External gear pumps are particularly suited for pumping water, polymers, fuels and chemical additives. Small external gear pumps usually operate at up to 3500 rpm and larger models, with helical or herringbone gears, can operate at speeds up to 700 rpm. External gear pumps have close tolerances and shaft support on both sides of the gears. This allows them to run at up to 7250 psi (500 bar), making them well suited for use in hydraulic power applications.

Since output is directly proportional to speed and is a smooth pulse-free flow, external gear pumps are commonly used for metering and blending operations as the metering is continuous and the output is easy to monitor. The low internal volume provides for a reliable measure of liquid passing through a pump and hence accurate flow control. They are also used extensively in engines and gearboxes to circulate lubrication oil. External gear pumps can also be used in hydraulic power applications, typically in vehicles, lifting machinery and mobile plant equipment. Driving a gear pump in reverse, using oil pumped from elsewhere in a system (normally by a tandem pump in the engine), creates a motor. This is particularly useful to provide power in areas where electrical equipment is bulky, costly or inconvenient. Tractors, for example, rely on engine-driven external gear pumps to power their services.

External gear pumps can be engineered to handle aggressive liquids. While they are commonly made from cast iron or stainless steel, new alloys and composites allow the pumps to handle corrosive liquids such as sulphuric acid, sodium hypochlorite, ferric chloride and sodium hydroxide.

External gear pumps are self-priming and can dry-lift although their priming characteristics improve if the gears are wetted. The gears need to be lubricated by the pumped fluid and should not be run dry for prolonged periods. Some gear pump designs can be run in either direction so the same pump can be used to load and unload a vessel, for example.

The close tolerances between the gears and casing mean that these types of pump are susceptible to wear particularly when used with abrasive fluids or feeds containing entrained solids. External gear pumps have four bearings in the pumped medium, and tight tolerances, so are less suited to handling abrasive fluids. For these applications, internal gear pumps are more robust having only one bearing (sometimes two) running in the fluid. A gear pump should always have a strainer installed on the suction side to protect it from large, potentially damaging, solids.

Generally, if the pump is expected to handle abrasive solids it is advisable to select a pump with a higher capacity so it can be operated at lower speeds to reduce wear. However, it should be borne in mind that the volumetric efficiency of a gear pump is reduced at lower speeds and flow rates. A gear pump should not be operated too far from its recommended speed.

For high temperature applications, it is important to ensure that the operating temperature range is compatible with the pump specification. Thermal expansion of the casing and gears reduces clearances within a pump and this can also lead to increased wear, and in extreme cases, pump failure.

Despite the best precautions, gear pumps generally succumb to wear of the gears, casing and bearings over time. As clearances increase, there is a gradual reduction in efficiency and increase in flow slip: leakage of the pumped fluid from the discharge back to the suction side. Flow slip is proportional to the cube of the clearances between the cog teeth and casing so, in practice, wear has a small effect until a critical point is reached, from which performance degrades rapidly.

Gear pumps continue to pump against a back pressure and, if subjected to a downstream blockage will continue to pressurise the system until the pump, pipework or other equipment fails. Although most gear pumps are equipped with relief valves for this reason, it is always advisable to fit relief valves elsewhere in the system to protect downstream equipment.

The high speeds and tight clearances of external gear pumps make them unsuitable for shear-sensitive liquids such as foodstuffs, paint and soaps. Internal gear pumps, operating at lower speed, are generally preferred for these applications.

External gear pumps are commonly used for pumping water, light oils, chemical additives, resins or solvents. They are preferred in any application where accurate dosing is required such as fuels, polymers or chemical additives. The output of a gear pump is not greatly affected by pressure so they also tend to be preferred in any situation where the supply is irregular.

An external gear pump moves a fluid by repeatedly enclosing a fixed volume within interlocking gears, transferring it mechanically to deliver a smooth pulse-free flow proportional to the rotational speed of its gears.

External gear pumps are commonly used for pumping water, light oils, chemical additives, resins or solvents. They are preferred in applications where accurate dosing or high pressure output is required. External gear pumps are capable of sustaining high pressures. The tight tolerances, multiple bearings and high speed operation make them less suited to high viscosity fluids or any abrasive medium or feed with entrained solids.

Ace developed the first hydraulic motor driven pump at the request of John Deere in 1969. Many of the original pumps are still operating today after more than 30 years of service.

Centrifugal pump design provides good resistance to abrasive solutions and extra flow for agitation. The advantages of the hydraulic motor driven pump are mounting versatility, customized performance, and ease of maintenance. All hydraulic driven pumps are equipped with a stainless steel shaft and wear ring for excellent corrosion resistance.MOUNTING VERSATILITY:The location of the pump is not tied to the PTO or engine drive shaft; the pump can be mounted in a variety of locations to suit application requirements.

CUSTOMIZED PERFORMANCE: The performance is dependent on the supply of hydraulic oil to the motor and not necessarily tied to engine speed. A hydraulic driven pump can produce higher pressures than PTO or belt driven pumps. They can also hold constant pressure at varying engine speeds on closed center hydraulic systems.

EASY MAINTENANCE: On a hydraulic driven pump there are no belts to align or break. Separate pump and hydraulic motor shafts simplify repair and replacement. Two main pump bearings support shaft loads. All pumps are equipped with easily replaceable FKM mechanical seals.

The Ace gear type hydraulic motor is more efficient than gerotor type motors, and is less subject to damage by contamination than the gerotor design. A built-in needle valve allows for the bypass of up to 9 GPM excess hydraulic fluid on open center systems. The standard motor has a reverse flow check valve which prevents backward hookup and a coasting check which protects the motor seal from the flywheel effect of the impeller. A restrictor orifice is included with pump models recommended for pressure compensating closed center systems. The Ace Internet Hydraulic Selection Guide is here to help in finding the proper hydraulic pump for your tractor.

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The 310 motor requires 16 GPM (60.6 LPM) maximum hydraulic fluid input. Recommended for:Large Open Center Systems up to 24 GPM (90.9 LPM) using internal needle valve bypass.

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The Gemini DPK (Dual Pump Kit) was designed to solve these concerns. Pick any two pumps with 204 or 206 motors, and run them from one SCV remote port. Run them at different rates. Shut one pump off while leaving the other pump running. Have your rate controller send PWM signal to one or both of the pumps for precision application.

The 310 motor requires 16 GPM (60.6 LPM) maximum hydraulic fluid input. Recommended for:Large Open Center Systems up to 24 GPM (90.9 LPM) using internal needle valve bypass.

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems. Recommended for:Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems.Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems.Pressure Compensating Closed Center Systems

The 206 motor requires 7 GPM (26.5 LPM) maximum hydraulic fluid input and fits virtually all tractor hydraulic systems.Pressure Compensating Closed Center Systems

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.