under hood hydraulic pump brands

Hydraulic clutch pumps are systems in which a clutch assembly is accompanied by a pump that allows the user to apply the required pressure to either engage or disengage the clutch system. Hydraulic clutches, like all clutches, are designed to either connect two shafts, lock them together to spin at the same speed, or decouple the shafts, allowing them to spin at different speeds, as is necessary to shift gears or decelerate.

Hydraulic clutch pumps are generally foot or hand-powered despite their close connection with engine components. The clutch pedal is used to engage a hydraulic piston pump in a basic vehicle design. The pump may be mounted directly to the clutch, or mounting brackets may be used. They were compressing the pedal forces a piston into a hydraulic cylinder, pressurizing the hydraulic fluids already in the enclosure. The mechanical energy created in this manner is transferred from the engine to related devices such as the transmission and drive wheels, allowing the driver to steer, shift, and decelerate. When the clutch is released, the piston is withdrawn. This action draws in hydraulic fluid from a reservoir, which will be compressed with the next engagement of the pedal. The engine environment and close proximity to possibly corrosive hydraulic fluids necessitate pump components to be made of materials that can handle high temperatures created by friction and stand up to corrosion. Die cast stainless steel and cast iron components are popular choices, though ceramics such as silicon carbide and alumina are also applicable in some instances. The fluid used must be compatible with the hydraulic clutch pump parts and the engine itself. Pumps may be mounted directly to the clutch, or mounting brackets may be used.

Hydraulic pumps, when used in clutch systems, use incompressible fluids, such as oil to transmit the force necessary to connect and disconnect an engine to the transmission’s input shaft. Clutch systems such as these are used in agriculture, automation, robotics, transit, automotive, transport, military, aerospace, and construction industries, among others. All kinds of engines and lift systems, ranging from conveyor belts to snow plows and tractors, utilize the power of hydraulic pumps to effectively move heavy loads with minimal effort.

Because these assemblies are used in vehicle power steering and braking systems, selecting the proper pump for a given application is essential. Considerations include torque rating, power, diameter, cross-sectional width, length, weight, rotational speed, and maximum pressure. Additionally, application-specific hydraulic clutch pumps may be either spring-actuated or spring-return. The former requires pressure to disengage the input shaft while the latter uses the hydraulic fluid to engage the power source.

Hydraulic pumps, when used in clutch systems, use incompressible fluids, such as oil, to transmit the force necessary to connect and disconnect an engine to the transmission"s input shaft. Clutch systems such as these are used in agriculture, automation and robotics, transit, automotive, transport, military, aerospace and construction industries among others. All kinds of engines and lift systems, ranging from conveyor belts to snow plows and tractors, utilize the power of hydraulic pumps to effectively move heavy loads with minimal effort.

Because these assemblies are used in vehicle power steering and breaking systems, it is essential to select the proper pump for a given application. Considerations include torque rating, power, diameter, cross-sectional width, length, weight, rotational speed and maximum pressure. Additionally, application-specific hydraulic clutch pumps may be either spring-actuated or spring-return. The former requires pressure to disengage the input shaft while the latter uses the hydraulic fluid to engage the power source.

Despite their close connection with engine components, hydraulic clutch pumps are generally foot or hand-powered pumps. In a basic vehicle design, the clutch pedal is used to engage a hydraulic piston pump. The pump may be mounted directly to the clutch, or mounting brackets may be used. Compressing the pedal forces a piston into a hydraulic cylinder, pressurizing the hydraulic fluids already in the enclosure.

The mechanical energy created in this manner is transferred from the engine to related devices such as the transmission and drive wheels, allowing the driver to steer, shift and decelerate as needed. When the clutch is released, the piston is withdrawn. This action draws in hydraulic fluid from a reservoir, which will be compressed with the next engagement of the pedal.

The engine environment and close proximity to possibly corrosive hydraulic fluids necessitates pump components be made of materials that can handle high temperatures created by friction as well as stand up to corrosion. Die cast stainless steel and cast iron components are popular choices, though ceramics such as silicon carbide and alumina are also applicable in some instances. The fluid used must be compatible not only with the hydraulic clutch pump parts but also with the engine itself. Pumps may be mounted directly to the clutch, or mounting brackets may be used.

Norman Equipment has been a leading supplier of hydraulic equipment including hydraulic piston pumps and motors for over 70 years. Full-line authorized stocking distributor of quality hydraulic components and systems from top manufacturers renowned for performance and reliability.

We recommend using the piston pumps in high-pressure applications. In some cases, it is more economical to run a piston pump compensated that puts out a very low output flow until needed. This lowers electric cost and pump wear that may reduce system down time.

Norman currently stocks the Parker Denison PV (PVP) units and is part of the Parker Denison Distribution Network if another unit is needed that is not in stock at Norman Equipment. Denison is one of the most recognized names in hydraulic units in the world. For many years, their products were recognized by their distinctive blue color. Today, the Denison brand is part of the Parker-Hannifin family and all pumps are painted black.

NOTES: Pump inlet never to exceed 8 inches/HG vacuum; inlet oil velocity not to exceed 8 ft./sec. Engine speed not to exceed 1500 RPM without special approval; pressure spikes to never exceed 10% beyond maximum rating. Pressure ranges based upon degrees of belt wrap, can vary by kit.

NOTES: Pump inlet never to exceed 8 inches/HG vacuum; inlet oil velocity not to exceed 8 ft./sec. Engine speed not to exceed 1500 RPM without special approval; pressure spikes to never exceed 10% beyond maximum rating. Pressure ranges based upon degrees of belt wrap, can vary by kit.

NOTES: Pump inlet never to exceed 8 inches/HG vacuum; inlet oil velocity not to exceed 8 ft./sec. Engine speed not to exceed 1500 RPM without special approval; pressure spikes to never exceed 10% beyond maximum rating. Pressure ranges based upon degrees of belt wrap, can vary by kit.

NOTES: Pump inlet never to exceed 8 inches/HG vacuum; inlet oil velocity not to exceed 8 ft./sec. Engine speed not to exceed 1500 RPM without special approval; pressure spikes to never exceed 4400 PSI; Pressure ranges based upon degrees of belt wrap, can vary by kit.

If your local hydraulic pump or power take off supplier does not carry CW Mill brand hydraulic clutch pump kits, contact us for the name of a distributor in your area.

High-performance FlowMaster hydraulic pumps combine rotary-driven pump motors with reciprocating pump tubes and flexible control features that perform in desert heat ...

RS PRO hydraulic barrel pumps, designed for use with 40 gallon metal drums, which will pump up to Hypoid 90 viscosity. These hand pumps fearure nitrile rubber (NBR) seals ...

As the new member of the Hydro product range, the hydraulic diaphragm metering pump Hydro/ 2 API 675 (HA2a) meets the requirements of API 675. The pumps stand ...

The radial piston pump type R consists of valve-controlled pump elements arranged in star form around an eccentric. For large flow rates, up to 42 pump elements can be set up in 6 stars ...

... axial piston pump type V60N is designed for open circuits in mobile hydraulics and operate according to the swash plate principle. They are available with the option of a thru-shaft for operating additional ...

... for open circuits in mobile hydraulics and operate according to the swash plate principle. They are available with the option of a thru-shaft for operating additional hydraulic pumps ...

The K3VG series are swash-plate type axial piston pumps which give excellent performance in high flow industrial applications in a compact and cost-effective package.

... Parker’s hydraulic truck pump series F1 featuring high self-priming speed and high efficiency and is one of the leading truck pumps in the market. The F1 pump provide ...

... Piston Pumps provide fixed-displacement power in a unique miniature design. Engineered for open-circuit systems, they bring flexibility to your operation. Compact Piston Pumps ...

... accessibly priced, aluminium gear pumps and motors are among the components most widely utilized in the field of hydraulic applications. Gear pumps are used to operate hydraulic ...

Sophisticated technology in the smallest space - this is what our Alfra electro-hydraulic pumps stand for. Due to the compact design, the powerful drive units also find room when things ...

Our hydraulic cylinder with a quick coupling has a performance up to 11 tons pressure – with a deadweight of only 2,5 kg. The SKP-1 is compatible with the ALFRA foot pump. Your advantage: Your hands are ...

... our ALFRA hydraulic cylinder SKP-1. In a team with the hydraulic pump DSP-120 it is capable to take a variety of challenges – because the SKP-1 working with a maximum operating pressure ...

... quality carbon steel, the pump design features allow it to work with viscous lubricants without any additional complicated priming procedures. The pump, when combined with a suitable ...

The Bansbach hydraulic pump series is an industrial offering that permits a wide range of applications, taking into account its configurable height mechanism. This device allows easy task execution with ...

... alkitronic hydraulic pumps with electric or pneumatic drive provide fast operating speed, reliability, and safety. They are designed for permanent operation. Our hydraulic ...

Bent axis XPi pumps are specially designed to meet the needs of truck equipment. Their compact design allows a direct flange-mounting on the PTO. All models are of 7 piston design to ensure optimal flow ...

Of the same design as the XPi pumps, the XAi fixed displacement pumps are with SAE flange and shaft and are available in displacements from 18 to 63 cc/rev.

With their unique design, PA-PAC pumps offer a robust and durable solution to the high pressure needs of truck applications. Combining the automatic dual direction of rotation, high operating pressure (up to 500 bar peak), ...

Our high-quality hydraulic pumps and motors are designed for performance and durability. We offer a wide variety to meet the needs of on/off road mobile equipment. Our Fluid Power Specialists can assist you in selecting the right product for your application.

Parker"s Hydraulic Pump and Power Systems Division provides a broad selection of piston pumps, hydraulic motors and power units that help our customers meet their industrial and mobile application needs. Our division is the result of the Parker piston pump business’s acquisition of Denison Hydraulics and merger with the Parker Oildyne Division. Reach higher hydraulic working pressures, get better reliability, higher efficiencies, and achieve lower operating costs and improved productivity on your heavy-duty equipment with Parker’s line of piston pumps and vane pumps, electro-hydraulic actuators, hydraulic motors and power units, piston motors and hydrostatic transmissions.

Zip’s AW Direct has the electric clutch you need for an eight-groove belt pump system. Find this and other clutch pump kits and repair parts today to keep your rig running like it should. We also carry serpentine belts, tensioners and idler pulleys for most makes and models.

There are typically three types of hydraulic pump constructions found in mobile hydraulic applications. These include gear, piston, and vane; however, there are also clutch pumps, dump pumps, and pumps for refuse vehicles such as dry valve pumps and Muncie Power Products’ Live PakTM.

The hydraulic pump is the component of the hydraulic system that takes mechanical energy and converts it into fluid energy in the form of oil flow. This mechanical energy is taken from what is called the prime mover (a turning force) such as the power take-off or directly from the truck engine.

With each hydraulic pump, the pump will be of either a uni-rotational or bi-rotational design. As its name implies, a uni-rotational pump is designed to operate in one direction of shaft rotation. On the other hand, a bi-rotational pump has the ability to operate in either direction.

For truck-mounted hydraulic systems, the most common design in use is the gear pump. This design is characterized as having fewer moving parts, being easy to service, more tolerant of contamination than other designs and relatively inexpensive. Gear pumps are fixed displacement, also called positive displacement, pumps. This means the same volume of flow is produced with each rotation of the pump’s shaft. Gear pumps are rated in terms of the pump’s maximum pressure rating, cubic inch displacement and maximum input speed limitation.

Generally, gear pumps are used in open center hydraulic systems. Gear pumps trap oil in the areas between the teeth of the pump’s two gears and the body of the pump, transport it around the circumference of the gear cavity and then force it through the outlet port as the gears mesh. Behind the brass alloy thrust plates, or wear plates, a small amount of pressurized oil pushes the plates tightly against the gear ends to improve pump efficiency.

A cylinder block containing pistons that move in and out is housed within a piston pump. It’s the movement of these pistons that draw oil from the supply port and then force it through the outlet. The angle of the swash plate, which the slipper end of the piston rides against, determines the length of the piston’s stroke. While the swash plate remains stationary, the cylinder block, encompassing the pistons, rotates with the pump’s input shaft. The pump displacement is then determined by the total volume of the pump’s cylinders. Fixed and variable displacement designs are both available.

With a fixed displacement piston pump, the swash plate is nonadjustable. Its proportional output flow to input shaft speed is like that of a gear pump and like a gear pump, the fixed displacement piston pump is used within open center hydraulic systems.

As previously mentioned, piston pumps are also used within applications like snow and ice control where it may be desirable to vary system flow without varying engine speed. This is where the variable displacement piston pump comes into play – when the hydraulic flow requirements will vary based on operating conditions. Unlike the fixed displacement design, the swash plate is not fixed and its angle can be adjusted by a pressure signal from the directional valve via a compensator.

Vane pumps were, at one time, commonly used on utility vehicles such as aerial buckets and ladders. Today, the vane pump is not commonly found on these mobile (truck-mounted) hydraulic systems as gear pumps are more widely accepted and available.

Within a vane pump, as the input shaft rotates it causes oil to be picked up between the vanes of the pump which is then transported to the pump’s outlet side. This is similar to how gear pumps work, but there is one set of vanes – versus a pair of gears – on a rotating cartridge in the pump housing. As the area between the vanes decreases on the outlet side and increases on the inlet side of the pump, oil is drawn in through the supply port and expelled through the outlet as the vane cartridge rotates due to the change in area.

Input shaft rotates, causing oil to be picked up between the vanes of the pump which is then transported to pump outlet side as area between vanes decreases on outlet side and increases on inlet side to draw oil through supply port and expel though outlet as vane cartridge rotates

A clutch pump is a small displacement gear pump equipped with a belt-driven, electromagnetic clutch, much like that found on a car’s air conditioner compressor. It is engaged when the operator turns on a switch inside the truck cab. Clutch pumps are frequently used where a transmission power take-off aperture is not provided or is not easily accessible. Common applications include aerial bucket trucks, wreckers and hay spikes. As a general rule clutch pumps cannot be used where pump output flows are in excess of 15 GPM as the engine drive belt is subject to slipping under higher loads.

What separates this pump from the traditional gear pump is its built-in pressure relief assembly and an integral three-position, three-way directional control valve. The dump pump is unsuited for continuous-duty applications because of its narrow, internal paths and the subsequent likelihood of excessive heat generation.

Dump pumps are often direct mounted to the power take-off; however, it is vital that the direct-coupled pumps be rigidly supported with an installer-supplied bracket to the transmission case with the pump’s weight at 70 lbs. With a dump pump, either a two- or three-line installation must be selected (two-line and three-line refer to the number of hoses used to plumb the pump); however, a dump pump can easily be converted from a two- to three-line installation. This is accomplished by inserting an inexpensive sleeve into the pump’s inlet port and uncapping the return port.

Many dump bodies can function adequately with a two-line installation if not left operating too long in neutral. When left operating in neutral for too long however, the most common dump pump failure occurs due to high temperatures. To prevent this failure, a three-line installation can be selected – which also provides additional benefits.

Pumps for refuse equipment include both dry valve and Live Pak pumps. Both conserve fuel while in the OFF mode, but have the ability to provide full flow when work is required. While both have designs based on that of standard gear pumps, the dry valve and Like Pak pumps incorporate additional, special valving.

Primarily used on refuse equipment, dry valve pumps are large displacement, front crankshaft-driven pumps. The dry valve pump encompasses a plunger-type valve in the pump inlet port. This special plunger-type valve restricts flow in the OFF mode and allows full flow in the ON mode. As a result, the horsepower draw is lowered, which saves fuel when the hydraulic system is not in use.

In the closed position, the dry valve allows just enough oil to pass through to maintain lubrication of the pump. This oil is then returned to the reservoir through a bleed valve and small return line. A bleed valve that is fully functioning is critical to the life of this type of pump, as pump failure induced by cavitation will result if the bleed valve becomes clogged by contaminates. Muncie Power Products also offer a butterfly-style dry valve, which eliminates the bleed valve requirement and allows for improved system efficiency.

It’s important to note that with the dry valve, wear plates and shaft seals differ from standard gear pumps. Trying to fit a standard gear pump to a dry valve likely will result in premature pump failure.

Encompasses plunger-type valve in the pump inlet port restricting flow in OFF mode, but allows full flow in ON mode lowering horsepower draw to save fuel when not in use

Wear plates and shaft seals differ from standard gear pumps – trying to fit standard gear pump to dry valve likely will result in premature pump failure

Live Pak pumps are also primarily used on refuse equipment and are engine crankshaft driven; however, the inlet on a Live Pak pump is not outfitted with a shut-off valve. With a Live Pak pump, the outlet incorporates a flow limiting valve. This is called a Live Pak valve. The valve acts as an unloading valve in OFF mode and a flow limiting valve in the ON mode. As a result, the hydraulic system speed is limited to keep within safe operating parameters.

Outlet incorporates flow limiting valve called Live Pak valve – acts as an unloading valve in OFF mode and flow limiting valve in ON mode restricting hydraulic system speed to keep within safe operating parameters

There is a lot to consider when planning the optimal way to power a vocational truck application, such as cost, available space, system power requirements, among many other variables. While it seems the vast majority of hydraulically powered work truck applications today utilize a power take-off as its primary power source, a common alternative is a hydraulic clutch pump.

A hydraulic clutch pump is a belt-driven pump that can be used instead of a power take-off for some applications, such as wreckers and bucket trucks, and is necessary on trucks without a power take-off aperture on the transmission.

A clutch pump is mounted to the engine compartment of the truck utilizing a mounting kit to secure in place. It is important to make sure there is enough space under the hood to accommodate the appropriately sized pump. The pump is belt-driven from the crankshaft pulley through an electric clutch, similar to what may be found on an automobile air conditioner compressor. Most applications will use a poly-V serpentine belt or two V-belts to drive the pump.

When considering a clutch pump, one critical aspect is to understand the horsepower requirements of your application versus the limitations of the engine belts. Most engine type belts can only drive somewhere between 7–18 horsepower which prohibits the use of large displacement pumps and may not provide enough displacement to effectively power the application at hand. With that said, clutch pumps remain a popular option for hydraulic applications requiring flows up to 15 GPM.

Muncie Power currently has clutch pump options and mounting kits available for most popular truck chassis including current models of Chevy/GMC, Dodge/Ram, Ford, International, and Freightliner.

Reach out to our customer service team (800-367-7867) or utilize our clutch pump online builder module to review available options and determine the best product for your unique application.

Quality Aircraft Accessories (QAA) stocks aircraft hydraulic power packs from a variety of manufacturers, including Cessna and Prestolite. QAA makes aircraft hydraulic power packs available on an exchange basis by working with the most trusted repair stations; Aerospace Turbine Rotables and Cox Airparts. If you’d like to learn more about aircraft power packs, click here to visit our aircraft power pack resource page.

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