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Designed for the toughest demands of open circuit systems, our axial piston pumps offer the right displacements to meet your unique system needs. A full line of controls and configurations have been engineered to meet multiple application needs.

The Danfoss MP1 is the next evolution in closed circuit axial piston pumps. No matter what industry you serve, MP1 pumps offer the performance needed for today"s small- to medium-sized equipment. Another example of our commitment to the mobile hydraulic industry. You can count on us to do business at your speed. Delivering what you need, when you need it—to propel you forward.

Our gear pumps are robust and reliable. They are the ideal choice for a wide range of applications - from small to medium and large off-highway vehicles, as well as for industrial applications.

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Series 20 Axial Piston Pumps Technical Information General DescriptionIntroduction Sauer-Danfoss a world leader in hydraulic power systems has developed a family of axial piston pumps. Sauer-Danfoss axial piston variable displacement pumps are of swash plate design with variable flow capability suitable for hydrostatic transmissions with closed loop circuit. Tilting the swash plate to the opposite side of the neutral or zero displacement position reverses flow direction. Sauer-Danfoss axial piston variable displacement pumps are well engineered and easy to handle. The full-length shaft with a highly efficient tapered roller bearing arrangement offers a high loading capacity for external radical forces. The hydro-mechanical servo displacement control maintains the selected swash plate position and hence pumps displacement. Upon release of the control handle, the swash plate automatically returns to zero position and the flow reduces to zero. High case pressures can be achieved without leakage even at the lowest temperatures by using suitable shaft seals. The servo valve arrangement offers the facility to incorporate function regulators and remote control systems. Axial piston units are designed for easy servicing. Complete dismantling and reassembly can be carried out with standard hand tools, and all components or sub-assemblies are replaceable. Axial piston variable displacement pumps of the Sauer-Danfoss pattern are made by licensed producers worldwide, providing consistent service and fully interchangeable parts. Typical markets Industrial Mining Transit Mixer Utility Vehicles

2011 Sauer-Danfoss. All rights reserved. Sauer-Danfoss accepts no responsibility for possible errors in catalogs, brochures and other printed material. Sauer -Danfoss reserves the right to alter its products without prior notice. This also applies to products already ordered provided that such alterations can be made without affecting agreed specifications. All trademarks in this material are properties of their respective owners. Sauer-Danfoss, the Sauer-Danfoss logotype, the Sauer-Danfoss S-icon, PLUS+1, What really matters is inside and Know-How in Motion are trademarks of the Sauer-Danfoss Group.Front cover illustrations: F005 104, F000 248, F000 150, F000 249

Series 20 Axial Piston Pumps Technical Information ContentsGeneral Description Axial Piston Variable Displacement Pump ............................................................................................ 4 Pump and Motor Circuit Description ...................................................................................................... 5 Pump circuit schematic ................................................................................................................................ 5 Technical Parameters .................................................................................................................................... 6 Design ........................................................................................................................................................... 6 Type of mounting ..................................................................................................................................... 6 Pipe connections ...................................................................................................................................... 6 Direction of rotation ................................................................................................................................ 6 Installation position ................................................................................................................................. 6 External drain fluid loss .......................................................................................................................... 6 Hydraulic Parameters .................................................................................................................................... 7 System pressure range, input p1 .......................................................................................................... 7 System pressure range, output p2 ....................................................................................................... 7 Case pressure ............................................................................................................................................. 7 Hydraulic fluids .......................................................................................................................................... 7 Temperature range................................................................................................................................... 7 Viscosity range ........................................................................................................................................... 7 Filtration ....................................................................................................................................................... 7 Shaft load ..................................................................................................................................................... 7 Hydraulic Parameters .................................................................................................................................... 8 Determination of Nominal Pump Sizes .................................................................................................. 8 Based on SI units/Based on US units.................................................................................................. 8 Servo Displacement Control (linear response) .................................................................................... 9 Pump flow direction ................................................................................................................................ 9 Reversing time .........................................................................................................................................10 Reset time ..................................................................................................................................................11 Changing reversing and reset time ..................................................................................................11 Configuration PS, displacement control VML 1 .................................................................................12 Configuration AA 010, displacement control VML 1 .......................................................................14 Configuration PS, displacement control VML 1 .................................................................................15 Configuration AA 010, displacement control VML 1 .......................................................................17

Series 20 Axial Piston Pumps Technical Information General DescriptionAxial Piston Variable Displacement Pump Sectional ViewSwash plate Control handle Servo valve (control valve)

Series 20 Axial Piston Pumps Technical Information General DescriptionPump and Motor Circuit DescriptionHEAT EXCHANGER BYPASS VALVE RESERVOIRCONTROL HANDLE

Above figure shows schematically the function of a hydrostatic transmission using an axial piston variable displacement pump and a fixed displacement motor. Pump Circuit Schematic1 3

Series 20 Axial Piston Pumps Technical Information Technical SpecificationTechnical Parameters Design Axial piston pump of swash plate design, with variable displacement. Type of mounting SAE four bolt flanges. Pipe connections Main pressure ports: SAE split flange Remaining ports: SAE O-ring boss Direction of rotation Clockwise or counterclockwise (viewing from the input shaft). Installation position Optional; pump housing must be always filled with hydraulic fluid. External drain fluid loss28 7 24 6 5 External drain fluid loss (l/min) 4 3 2 1 0 20 334 Typical values for 350 bar [5076 psi] and 18 swashplate angle

Series 20 Axial Piston Pumps Technical Information Technical SpecificationHydraulic Parameters System pressure range, input p1 Variable displacement pump: Charge pressure nominal: 13 bar [189 psi] above case pressure Charge pressure minimum: 8 bar [116 psi], intermittent only Charge pump input pressure: Min. allowable pressure, continuous Min. allowable pressure, intermittent = = 0.75 bar [10.9 psi] absolute 0.50 bar [7.3 psi] absolute (for cold start)

Charge pump output pressure: Max. operating pressure = 35 bar [508 psi] above case pressure System pressure range, output p2 Pressure on port A or B: Max. operating pressure p = 420 bar [6092 psi] Max. high pressure setting p = 460 bar1 [6672 psi]1

Hydraulic fluids Refer to Sauer-Danfoss publications Hydraulic Fluids and Lubricants, 520L0463 and Experience with Biodegradable Hydraulic Fluids, 520L0465. Temperature range min = - 40 C [- 40 F] max = 95 C [203 F] Viscosity range min = 7 mm2/s [49 SUS*] max = 1000 mm2/s [4630 SUS*] (intermittent cold start) Recommended viscosity range: 12 - 60 mm2/s [66 - 280 SUS*]*SUS (Saybolt Universal Second)

Filtration Required cleanliness level: ISO 4406 - 1999 Code 22/18/13 or better. Refer to SauerDanfoss publication Hydraulic Fluids and Lubricants, 520L0463 and Design Guideline for Hydraulic Fluid Cleanliness, 520L0467. Shaft load The pump will accept radial and axial loads on its shaft, the maximum capacity being determined by direction and point of application of the load. Please contact your SauerDanfoss representative.

Series 20 Axial Piston Pumps Technical Information Technical SpecificationServo Displacement Control (linear response) Regulated by the control handle on the servo valve, the swash plate can be infinitely varied in both directions with the help of the servo system. The pump displacement resulting from any control handle position can be established using the figures on this page. The angle of the control handle for stroke initiation and for the final position of the stroke can vary from unit to unit within the range of the tolerance band. The inter-relation of flow direction, rotation of the pump and the control handle movement is shown below. Pump flow direction Flow direction changes with the direction of rotation and the control handle movement (see besides).Pump rotation CCW (Left) CW (Right) Movement of control handle in direction C D C D Pressure Pressure port port OUT IN B A A B A B B AC D

Series 20 Axial Piston Pumps Technical Information Technical SpecificationServo Displacement Control (linear response) (continued) Reversing time Time for the directional change of the flow from Qmax , across zero to Qmax , depending on the size of the control orifice fitted in the supply port to the servo valve (see below). The values given assume movement of the control handle directly from one end position to the other. Adjustment time of handle: Operating pressure: Speed: System temperature: Viscosity:Frame size070 089 334

Series 20 Axial Piston Pumps Technical Information Technical SpecificationServo Displacement Control (linear response) (continued) Reset time Time for reducing the flow from either flow direction from Qmax to 0 releasing the control handle. Assuming no mechanical blockage of the control handles free return and assuming no orifices in the pilot ports: Operating pressure: System temperature: Viscosity: p2 = 210 bar [3046 psi] 50 C [122 F] 35 mm2/s [164 SUS]

Series 20 Axial Piston Pumps Technical Information Dimensions Frame Size 070 and 089 cm3Configuration PS, displacement control VML 1 (continued)View X (for SPV 2/070 only)DD EE 9.4 0.24 Control handle Control handle shaft spline data: 64/128 pitch, 64 diametral pitch acc. to SAE handbook 1963 Outside diameter = 10.13 - 0.14 Number of teeth = 24

Designation: 1 = Variable Displacement pump 3 = Servo control valve 4 = Charge check valve 7 = Heat exchanger Ports: A, B = Main pressure ports (working loop) L1, L2 = Drain ports M = Gauge port - charge pressure

Series 20 Axial Piston Pumps Technical Information Dimensions Frame Size 334 cm3Configuration PS, displacement control VML 1 (continued)View YGauge port servo cylinder pressure Port "L1": Case drain port Charge pump pressure gauge port 7/16-20 UNF-2B SAE straight thread O - ring boss 116 95.8 Port "A" 17.5 187.2 Case drain port 164 96

Approximate centre of gravity Port "B" 81 Port "S" 158.7 Port "B" 158.7 Port "A" 187.2 Case drain port Port "L2": Case drain port Position of charge pump for counterclockwise (L) rotation27.7 0.6

Designation: 1 = Variable Displacement pump 3 = Servo control valve 4 = Charge check valve 7 = Heat exchanger Ports: A, B = Main pressure ports (working loop) L1, L2 = Drain ports M = Gauge port - charge pressure

Products we oer: Bent Axis Motors Closed Circuit Axial Piston Pumps and Motors Displays Electrohydraulic Power Steering Electrohydraulics Hydraulic Power Steering Integrated Systems Joysticks and Control Handles Microcontrollers and Software Open Circuit Axial Piston Pumps Orbital Motors PLUS+1 GUIDE Proportional Valves Sensors Steering Transit Mixer Drives

Sauer-Danfoss is a global manufacturer and supplier of highquality hydraulic and electronic components. We specialize in providing state-of-the-art technology and solutions that excel in the harsh operating conditions of the mobile off-highway market. Building on our extensive applications expertise, we work closely with our customers to ensure exceptional performance for a broad range of off-highway vehicles. We help OEMs around the world speed up system development, reduce costs and bring vehicles to market faster. Sauer-Danfoss Your Strongest Partner in Mobile Hydraulics.

Wherever off-highway vehicles are at work, so is Sauer-Danfoss. We offer expert worldwide support for our customers, ensuring the best possible solutions for outstanding performance. And with an extensive network of Global Service Partners, we also provide comprehensive global service for all of our components.

Members of the Sauer-Danfoss Group: Comatrol www.comatrol.com Schwarzmller-Inverter www.schwarzmueller-inverter.com Turolla www.turollaocg.com Hydro-Gear www.hydro-gear.com Sauer-Danfoss-Daikin www.sauer-danfoss-daikin.com

Sauer-Danfoss (US) Company 2800 East 13th Street Ames, IA 50010, USA Phone: +1 515 239 6000 Fax: +1 515 239 6618 Sauer-Danfoss GmbH & Co. OHG Postfach 2460, D-24531 Neumnster Krokamp 35, D-24539 Neumnster, Germany Phone: +49 4321 871 0 Fax: +49 4321 871 122

Sauer-Danfoss-Daikin LTD. Shin-Osaka TERASAKI 3rd Bldg. 6F 1-5-28 Nishimiyahara, Yodogawa-ku Osaka 532-0004, Japan Phone: +81 6 6395 6066 Fax: +81 6 6395 8585

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Pump displacements .................................................................................................................................... 4

Pump design .................................................................................................................................................... 5

Gear pump in circuit ...................................................................................................................................... 5

Hydraulic fluids..............................................................................................................................................11

Pump drive .....................................................................................................................................................14

Pump drive data form .................................................................................................................................15

Pump life ..........................................................................................................................................................16

Our team of trained engineers and technicians have been remanufacturing Sauer-Danfoss® (Sauer-Sundstrand) pumps and motors for over 30 years. We specialize in the remanufacturing of nearly every Series in the Sauer-Danfoss/Sundstrand family. Many units are in stock and available for immediate delivery. Don"t see what you"re looking for? Our inventory is constantly changing, give us a call - we still might have it or can possibly source it from our other companies.

Twenty percent smaller than conventional gear products, Danfoss cast iron gear pumps give great power density in a small package. D-series pumps are known for their rugged, dependable performance under high pressure.

Looking for innovative solutions for optimal machine control performance? Flint Hydraulics represents Danfoss screw-in and slip-in cartridge valves. This comprehensive line includes pressure control valves, directional control valves, flow control valves, logic elements, proportional control valves, and several specialty valves. These versatile hydraulic valves can be used as stand-alone devices or can be built into custom manifolds. When combined with a Danfoss  HIC manifold, a cartridge valve can control virtually any mobile or industrial hydraulic application.