The Eaton® Light Duty Hydrostatic Transmission consists of a variable displacement radial ball piston hydraulic pump, a fixed displacement radial ball piston hydraulic motor and a system of valves, all contained in one housing. It can be used in many different types of applications where variable output speed is a requirement. It has many advantages over other variable speed drives (electric and mechanical) and gear type transmissions.

Typical applications include Lawn Tractors, Concrete saws, Agricultural Sprinklers.

Features

• Ball Piston design less sensitive to over heating
• Totally integrated pump/motor package
• Aluminum cooling fins
• Precise single lever control

Benefits

• Proven, reliable
• Eliminates leaks from external lines
• Environment/temperature tolerant
• Can in some case eliminate need for external cooler
• Eliminates complex linkages

• Response - These transmissions respond faster than any other type of power-transmitting system.
• Precise speed - Has the capability of maintaining precise speed under varying load conditions.
• Ease of operation - One lever controls direction and speed smoothly without gear change.
• Low maintenance - Simple design keeps maintenance to a minimum.
• Increased Productivity and Versatility - It allows complete matching of power to load.
• Self contained - There are no external high pressure lines, separate drive components, etc.
• Simplified final product design - It reduces the number of mechanical drive components.
• Positive Braking Action - The lever that controls speed also provides braking. The output shaft speed decreases as lever is moved toward neutral. With lever in neutral, output stops.

• The Model 6 transmission is designed primarily for light duty applications requiring up to 1,9 kW [2.5 hp] output for continuous operation.
• The Model 7 transmission is an expansion of the light duty product line. The Transmission is a result of product refinements to the Model 6 Transmission. Most significant among these refinements is reduction in noise levels generated by various duty cycle situations at high torque or load conditions.
• The Model 11 transmission is designed primarily for applications with engines rated at 7,5- 15 kW [10-20 hp] at maximum speed of 3600 rpm, or electric motors up to 7,5 kW [1 hp] at 3600 rpm.

Models 6 and 7 Series Performance Data

Model 11 Transmission Series Performance Data

Eaton® Models 751, 771, 781, and 851 use the time proven ball piston design for both pumps and motors. The Models 751 and 851 use one ball piston pump and two ball piston motors to provide the speed and torque required to propel vehicles of many different sizes.

• Smooth Performance - Infinitely adjustable control, delivering smooth operation in both forward and reverse.
• Easy Operation - One control provides both forward and reverse, plus speed. No clutch, no synchronizer, no shifting.
• Hydrostatic Dynamic Braking - In all kinds of weather, all kinds of terrain, Eaton® hydros provide dynamic braking in either forward or reverse.
• Quiet Operation - Equipped with special pistons to reduce noise and vibration no matter how tough the job.
• Trouble Free Performance - A proven, tested design ensures years of reliable operation with little or no maintenance.
• Environmentally protected - wet type parking / emergency brake(s), which can be used for full emergency stops in addition to the dynamic braking capability of the hydrostatic transmission.
• Vertical input shaft - which allows use with today's popular vertical shaft engine (a horizontal input option is available).

Model 751 Series Performance Data

Model 851 Series Performance Data

Model 771 Series Performance Data

Model 781 Series Performance Data

Eaton® Models 778 use the time proven ball piston design for both pumps and motors. The 778 is an assembly with one pump and one motor. Two assemblies, are required on each vehicle.

Typical applications are for Zero Turn Radius Mowers (two per vehicle).

• Smooth Performance - Infinitely adjustable control, delivering smooth operation in both forward and reverse.
• Easy Operation - One control provides both forward and reverse, plus speed. No clutch, no synchronizer, no shifting.
• Hydrostatic Dynamic Braking - In all kinds of weather, all kinds of terrain, Eaton® hydros provide dynamic braking in either forward or reverse.
• Quiet Operation - Equipped with special pistons to reduce noise and vibration no matter how tough the job.
• Trouble Free Performance - A proven, tested design ensures years of reliable operation with little or no maintenance.
• Environmentally protected - wet type parking / emergency brake(s), which can be used for full emergency stops in addition to the dynamic braking capability of the hydrostatic transmission.
• Vertical input shaft - which allows use with today's popular vertical shaft engine (a horizontal input option is available).
• Internal Life time Filter
• Dump Valve for roll release

Model 778 Series Performance Data

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