Using standard, industry-grade, dyno testing, Parker hydrostatic transmissions were found to have up to 25% better fuel efficiency than the competition. This means more savings for your end user, and a greener product for you. On top of being a more efficient product, Parker high-torque transmissions have a higher start-up torque and higher overall torque than the competition.
For turf applications, this means a more powerful hill climbing capability. The extra torque comes thanks to the low-speed, high-torque motor design used in the pump and motor. The low speed design also provides a smoother, quieter operation. Finally, the hydrostatic transmissions from Parker come equipped with an integrated brake system. This creates the potential for emergency stopping without the possibility of internal contamination.
If you would like to learn more about Parker Integrated Hydraulics and Transmissions, please check out our online configuration and product pages for catalogs and CADs.
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If a customer knows their performance requirements, they can get a gerotor motor in hand faster, and begin modeling and testing earlier. The feature chart provides invaluable information for customers to educate themselves, leading to better, more effective designs.
Do you know the flow rate you need? How about the pressure requirement? Or torque? If you know any of these specs, you can use the table below to find a Parker Gerotor Pump suited for your application. Can’t find what you need? Give us a call and get a pump customized for you.
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Parker Torqmotor's low-speed, high-torque design allows for quieter, smoother, and longer performance over the life of your machine. A low-speed high-torque motor creates higher start-up and overall torque, which translates to more powerful hill-climbing capability than the competition. This allows for more effective mowing in turf applications.
When paired with Parker's, patented, HT-1000 transmission fluid, Parker Torqmotors can perform consistently and reliably for 1,000 hours, without the need for a transmission fluid change. Less downtime and greater, heavy duty performance makes the Parker Torqmotor ideal for a multitude of applications.
Parker Pump and Motor Division offers a wide selection of hydraulic motors including high speed motors, hydraulic brake motors, hydraulic pumps for lawn tractors, low speed high torque motors, orbit hydraulic motor, dual speed motors and more.
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Parker Hydraulic Pump Division offers a high-performance, heavy-duty transmission fluid, specially designed for hydraulic applications. The Parker engineered oil, deemed HT-1000, is a full synthetic fluid and can run hotter, cleaner, and for longer periods of time. These perks extend time between oil changes and protect against user negligence. This means less maintenance and less downtime for consumers.
HT-1000 Hydrostatic Transmission Fluid is ideal for heavy duty hydrostatic applications requiring maximum life and optimum anti-wear protection for the components of today’s advanced hydrostatic drive systems.
A gerotor is a positive displacement, internal gear pump. The gerotor principle is based on an inner and an outer gear. The inner gear has one less tooth than the outer. The inner gear has its center-line positioned at a fixed eccentricity from the center-line of the outer rotor. As the gears rotate about their own respective axes, oil is drawn into the enlarging chamber. As the gear continues to rotate, the formerly enlarged chamber begins to shrink, increasing pressure. As the pressure increases, the oil is discharged out of the gerotor type pump. This process occurs constantly for each chamber, providing a smooth pumping action.
Parker is a leading gerotor pumps and motors manufacturer specializing in aluminum high speed, low torque solutions and offering high performance and high power density due to its aluminum construction.
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Typical gear pumps utilize a journal bushing design for higher pressure applications. However, a roller bearing pump uses a roller bearing design that allows for better startup torque and more resistance to contamination. This characteristic makes them ideal for "dirty" applications like off-road equipment and truck. Furthermore, a roller bearing design's low starting friction makes it perfect for intermittent operations or applications in cold environments. Low friction also means less heat and noise from the pump.
An external rotary gear pump uses two interlocking, rotating gears to move fluid from one point to another. Gear pumps can create the high flows and pressures required by industries like oil and gas, truck, and material handling. Gear pumps provide a consistent and reliable flow because of the uniform, positive displacement gear pump design created with each revolution. Close tolerances between the gear teeth prevent fluid from leaking backwards through the gears, and disrupting flow. Typically, one gear is driven by a motor, and the second gear (idler) is driven by the first gear.
A cross-sectional view of the pumping chambers illustrates the flow path of the hydraulic oil through the gear pump. As the gears counter-rotate (blue), the separating gear teeth create a vacuum, drawing oil into the inlet. Oil is picked up by each tooth and carried around the outside of the gear (yellow). Oil is NOT drawn through the center of the pump. The pockets between the gear teeth and the housing are referred to as pumping chambers. As the gear teeth mesh on the outlet side, oil is forced out of the pockets and exits the pump.
Downstream resistance to the output flow causes an increase in pressure. High-pressure on the outlet side of the housing forces the gears to deflect into the low-pressure (inlet) side (black). The tips of the gear teeth contact the housing, preventing high-pressure output oil from leaking back to the low-pressure inlet. Although necessary, this tooth-to-housing contact can generate cast iron contaminants, particularly in new units.
To combat this contamination, Parker tests all units before shipping, bringing them up to their operating pressure. Any contaminants generated during testing is filtered out by our test stands.
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