H1 Family of Pumps and Motors

H1 - the New Generation of Hydrostatics

Higher output speeds, lower input speeds and a reduced total installed lifecycle cost – our unique H1 family of closed circuit variable displacement axial piston pumps and bent axis motors is designed for high and medium power needs.  

Delivering high power density in a compact, flexible design, all units are PLUS+1 Compliant for user-friendly control system development. An integral electrohydraulic servo piston assembly controls the speed and direction of the hydraulic flow.

At Sauer-Danfoss, we have been developing advanced components and systems for off-highway mobile machinery for more than 40 years. That experience is at the heart of our H1 solutions.

• Designed for quality and reliability
• Easy installation and packaging
• Optimized for electrical control
• Expanded functionality
• Greater total efficiency

 H1 Family Product Brochure (PDF 6 MB)

H1 Axial Piston Pumps

Our H1 pumps feature common design technologies and assembly techniques. Overall, they offer simpler, high performance designs with fewer parts than previous hydrostatic products. Designed for smaller package sizes, our pumps provide design engineers with more freedom and flexibility in system design.

Greater Machine Efficiency

H1 pumps reduce rotating group, control and charge pump losses, which saves fuel consumption, frees power for other vehicle functions and enhances operating performance and productivity. Better efficiency means that you can use smaller engines on some machines, while you also reduce machine heat load and increase power to the ground.

Expanded Functionality

The market is expecting machines with enhanced operator and/or vehicle safety features and H1 offers numerous new options designed to address these issues.

Examples include: 

• A tandem Control Cut Off (CCO) circuit. 
• An Integral Speed Limitation (ISL) circuit.
• Integral pressure filtration with a filter bypass sensor and switch.

SD Product	Displacement cm³/rev [in³/rev]	Maximum Pressure bar [psi]	Controls	Technical Information	Data Sheet
H1 Pump	78 [4.76], 089 [5.44], 100 [6.21], 115 [7.0],  130 [7.93],  147 [8.97], 165 [10.07]	Up to 480 [Up to 6960]	Electrical	(PDF 32 MB)	78 (PDF 1 MB) 089/100 (PDF 1 MB) 115/130 (PDF 1 MB) 147/165 (PDF 0.5 MB)
H1 Pump	45 [2.75], 53.8 [3.28]	Up to 400 [5.800]	Electrical	(PDF 32 MB)	Single (PDF 0.5 MB) Tandem (PDF 0.5 MB)

New H1 Bent Axis Motors

Our new H1 80cm³ and 110cm³ bent axis motors, are the first sizes in a new series of motors designed to complement the growing family of H1 axial piston pumps. Featuring proven 32 degree bent axis technology, zero degree capability and higher overall efficiency, they offer a number of significant advantages. 

Higher Overall Efficiency

H1 motors provide significant improvements in overall efficiency. An optimized valve segment and piston design helps improve fuel economy and frees power for other vehicle functions, enhancing operating performance and increasing productivity. 

Zero Degree Capability

A key feature of the new H1 motors is their zero degree capability. The ability to seamlessly reduce the angle to zero degrees means there is no torque interruption, or sudden change in speed when switching from, for example, work range to travel range. This enhanced control is not only more precise, but also improves the feel of the system during operation.

Zero degree capability enables accurate anti-slip and torque control functions, which increase vehicle productivity and optimize power utilization. It is also possible to provide wheel assist solutions without the need for additional technology. Even true two-speed applications, for example a crop sprayer, can be supported by our H1 motors. 

Additional features include: 

• Electrical control with IP69 rating
• Improved starting torque
• Low speed capability (25 rpm)

SD Product	Displacement cm³/rev [in³/rev]	Maximum Pressure bar [psi]	Controls	Technical Information	Data Sheet
H1 Bent Axis Variable Motor	80 [4.88] 110 [6.71]	480 [6960]	Electric	(PDF 7 MB)	(PDF 1 MB) (PDF 0.5 MB)