Technical Information
Series 90
Axial Piston Motors
www.danfoss.com
Technical Information
Series 90 Axial Piston Motors
Revision history |
Table of revisions |
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Date |
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Changed |
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November 2021 |
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Fixed Endcap Ports in MMC, adjusted revision numbers with DAM Hub |
0711 |
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July 2021 |
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Updated operating parameters |
0608 |
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June 2021 |
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Updated Master Model Code, Changed document number from 'BC00000017' to |
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'BC152886483265' |
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July 2019 |
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Ffixed data 90K75 Cart. and SAE mount. |
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January 2017 |
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edits to graph and table on page 17 |
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July 2016 |
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fix drawing on page 27 |
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November 2015 |
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fixx drawing on page 30 |
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March 2014 |
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connector corrections on page 18 |
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February 2014 |
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Danfoss Layout |
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November 2013 |
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remove variable motors information |
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November 2012 |
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various updates |
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September 2008 |
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flange to shaft length dimension should be [5.15 ±0.001] |
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April 2007 |
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Remove allowable shaft loading data - consult factory |
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March 2004 |
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Fourth edition |
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2 | © Danfoss | November 2021 |
BC152886483265en-000711 |
Technical Information |
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Series 90 Axial Piston Motors |
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Contents |
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General Description |
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Series 90 Family of Pumps and Motors..................................................................................................................................... |
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Fixed Displacement Motor, SAE Mount.................................................................................................................................... |
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Fixed Displacement Motor, Cartridge Mount........................................................................................................................ |
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Series 90 Pictorial Circuit Diagram............................................................................................................................................. |
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System Schematic............................................................................................................................................................................ |
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Technical Specifications |
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Overview.............................................................................................................................................................................................. |
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Features and Options...................................................................................................................................................................... |
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Specifications..................................................................................................................................................................................... |
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Operating Parameters..................................................................................................................................................................... |
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Fluid Specification............................................................................................................................................................................ |
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Operating Parameters |
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Input Speed...................................................................................................................................................................................... |
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Independent Braking System............................................................................................................................................... |
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System Pressure.............................................................................................................................................................................. |
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Case Pressure................................................................................................................................................................................... |
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Temperature.................................................................................................................................................................................... |
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Viscosity............................................................................................................................................................................................. |
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System Design Parameters |
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Fluid and Filtration........................................................................................................................................................................ |
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Independent Braking System.................................................................................................................................................... |
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Reservoir............................................................................................................................................................................................ |
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Overpressure Protection............................................................................................................................................................. |
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Case Drain......................................................................................................................................................................................... |
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Sizing Equations............................................................................................................................................................................. |
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Formulas...................................................................................................................................................................................... |
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External Shaft Loading and Bearing Life................................................................................................................................ |
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Applications with external shaft loads.............................................................................................................................. |
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Master Model Code |
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Series 90 Motors Master Model Code Breakdown............................................................................................................. |
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S90 Type, Size Endcap Options................................................................................................................................................. |
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S90 Shaft and Loop Flushing System...................................................................................................................................... |
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S90 Special Hardware and Loop Flushing Valve................................................................................................................. |
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Features and Options |
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Loop Flushing.................................................................................................................................................................................. |
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Speed Sensor................................................................................................................................................................................... |
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Shaft Options................................................................................................................................................................................... |
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Installation Drawings |
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90K55 Fixed Motor Cartridge Mount...................................................................................................................................... |
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90M55 Fixed Motor SAE Mount................................................................................................................................................ |
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90K75 Fixed Motor Cartridge Mount...................................................................................................................................... |
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90M75 Fixed Motor SAE Mount................................................................................................................................................ |
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90M100 Fixed Motor SAE Mount.............................................................................................................................................. |
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90M130 Fixed Motor SAE Mount.............................................................................................................................................. |
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© Danfoss | November 2021 |
BC152886483265en-000711 | 3 |
Technical Information
Series 90 Axial Piston Motors
Series 90 hydrostatic pumps and motors can be applied together or combined with other products in a system to transfer and control hydraulic power. They are intended for closed circuit applications.
Series 90 variable displacement pumps are compact, high power density units. All models utilize the parallel axial piston/slipper concept in conjunction with a tiltable swashplate to vary the pump's displacement. Reversing the angle of the swashplate reverses the flow of oil from the pump and thus reverses the direction of rotation of the motor output.
Series 90 pumps include an integral charge pump to provide system replenishing and cooling oil flow, as well as control fluid flow. They also feature a range of auxiliary mounting pads to accept auxiliary hydraulic pumps for use in complementary hydraulic systems. A complete family of control options is available to suit a variety of control systems (mechanical, hydraulic, electric).
Series 90 motors also use the parallel axial piston/slipper design in conjunction with a fixed swashplate. They can intake/discharge fluid through either port; they are bidirectional. They also include an optional loop flushing feature that provides additional cooling and cleaning of fluid in the working loop.
•Series 90 – advanced technology today
•Seven sizes of variable displacement pumps
•Four sizes of fixed displacement motors
•SAE and cartridge mount configurations
•Efficient axial piston design
•Proven reliability and performance
•Compact, lightweight
•Worldwide sales and service
4 | © Danfoss | November 2021 |
BC152886483265en-000711 |
Technical Information
Series 90 Axial Piston Motors
General Description
Cross section
Loop flushing valve
Valve plate |
Piston |
Roller bearing
Output shaft
P100 490E
Fixed swashplate
Cylinder block
Name plate
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Model-No./Ident-No. |
501829 |
Model |
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Model Code 90M100 NC 0 N 7 N 0 C7 |
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Model |
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W 00 CBA 00 00 83 |
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Code |
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Serial-No. |
A - 00 - 13 - 67890 |
Serial |
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Number
Made in Germany
Place of Manufacture
© Danfoss | November 2021 |
BC152886483265en-000711 | 5 |
Technical Information
Series 90 Axial Piston Motors
General Description
Cross section
Cylinder block
Charge relief valve
bearing
Loop flushing
valve Output shaft
Valve plate
P104 253E
Swashpla te
Name plate
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Model-No./Ident-No. |
501829 |
Model |
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Model Code 90M100 NC 0 N 7 N 0 C7 |
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Model |
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W 00 CBA 00 00 83 |
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Code |
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Serial-No. |
A - 00 - 13 - 67890 |
Serial |
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Number
Made in China
Place of Manufacture
6 | © Danfoss | November 2021 |
BC152886483265en-000711 |
Technical Information
Series 90 Axial Piston Motors
General Description
The circuit diagram shows a hydrostatic transmission using a Series 90 axial piston variable displacement pump and a Series 90 fixed displacement motor.
Control handle |
Displacement control valve |
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Heat exchanger bypass valve |
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Orificed heck |
Reservoi |
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Vacuum gauge |
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valve |
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valve |
P102 000 |
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Reversiblevariable |
Servo control cylinder |
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Fixed displacement motor |
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displacement pump |
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To |
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pump |
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Servo |
case |
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pressure |
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relief valves |
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Charge pump |
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Input shaft |
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Multi-function valve |
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Output shaft |
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Motor swashplate |
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Pump swashplate |
Servo control cylinder |
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Loop flushing valve |
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Pump |
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Motor |
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Working loop (high pressure) |
Working loop (low pressur e) |
Suction line |
Control fluid |
Case drain fluid |
System Schematic |
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M3 |
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L2 |
M3 |
M1 |
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A |
A |
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M1 |
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M4 |
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M5 |
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M |
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M2 |
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B |
B |
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S |
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L2 |
L1 |
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M2 |
P104 286E |
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© Danfoss | November 2021 |
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BC152886483265en-000711 | 7 |
Technical Information
Series 90 Axial Piston Motors
Specifications for the Series 90 motors are listed here for quick reference. For definitions and additional information, see Operating Parameters on page 8.
Motor type |
In-line, axial piston, closed loop, positive displacement motors |
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Direction of rotation |
Bi-directional, see outline drawings for rotation vs. flow direction information |
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Installation position |
Discretionary: Housing must be filled with hydraulic fluid |
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Other system requirements |
Independent braking system, overpressure protection, suitable reservoir, proper |
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filtration |
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Parameter |
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055 MF |
075 MF |
100 MF |
130 MF |
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Types of mounting (SAE flange size |
SAE C, cartridge |
SAE C, cartridge |
SAE C |
SAE D |
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per SAE J744) |
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Port connections |
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Twin, axial |
Twin, axial |
Twin |
Twin |
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Output shaft options |
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Spline, tapered, |
Spline, tapered, |
Spline, tapered, |
Spline |
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straight |
straight |
straight |
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Control options |
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— |
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Loop flushing |
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• |
• |
• |
• |
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Speed sensor |
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o |
o |
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o |
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• Standard
o Optional
— Not available / not applicable
Parameter |
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055 MF |
075 MF |
100 MF |
130 MF |
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Swashplate |
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Fixed |
Fixed |
Fixed |
Fixed |
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Max. displacement |
55 |
[3.35] |
75 |
[4.57] |
100 [6.10] |
130 [7.90] |
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cm³/rev [in³/rev] |
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Maximum corner power kW [hp] |
187 [251] |
237 [318] |
292 [392] |
354 [475] |
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Theoretical torque |
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0.88 |
1.19 |
1.59 |
2.07 |
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N•m/bar [lbf•in/1000 psi] |
[530] |
[730] |
[970] |
[1260] |
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Weight |
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SAE |
22 |
[49] |
26 |
[57] |
34 [74] |
45 [99] |
kg [lb] |
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Cartridge |
26 |
[57] |
33 |
[72] |
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— |
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Mass moment of inertia |
0.0060 [0.0044] |
0.0096 [0.0071] |
0.0150 [0.0111] |
0.0230 [0.0170] |
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kg•m² [slug•ft²] |
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Parameter |
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Unit |
055 MF |
075 MF |
100 MF |
130 MF |
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Speed limits |
Continuous (max. disp.) |
min-1 |
3900 |
3600 |
3300 |
3100 |
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(rpm) |
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Maximum (max. disp.) |
4250 |
3950 |
3650 |
3400 |
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Continuous (min. disp.) |
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Maximum (min. disp.) |
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8 | © Danfoss | November 2021 |
BC152886483265en-000711 |
Technical Information
Series 90 Axial Piston Motors
Technical Specifications
Parameter |
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Unit |
055 MF |
075 MF |
100 MF |
130 MF |
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System pressure |
Maximum working pressure |
bar |
450 |
[6525] |
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[psi] |
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Maximum pressure |
480 |
[6960] |
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Maximum low loop |
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45 [650] |
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Minimum low loop pressure |
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10 [145] |
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Flow ratings |
Rated (max. disp., rated speed) |
l/min |
215 |
[57] |
270 [71] |
330 [87] |
403 [106] |
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[US gal/min] |
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Maximum (max. disp., max. |
234 |
[62] |
296 [78] |
365 [96] |
442 [117] |
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speed) |
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Case pressure |
Maximum working pressure |
bar |
3 [44] |
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[psi] |
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Maximum (cold start) |
5 [73] |
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Viscosity
Intermittent1) |
5 mm2/s [42 SUS] |
Minimum |
7 mm2/s [49 SUS] |
Recommended range |
12 – 80 mm2/s [66 – 370 SUS] |
Maximum |
1600 mm2/s [7500 SUS] |
1) Intermittent = Short term t < 1 min per incident and not exceeding 2 % of duty cycle based load-life.
Temperature
Minimum 1) |
-40°C [-40°F] |
Rated |
104°C [220°F] |
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Recommended range2) |
60 – 85°C [140 – 185°F] |
Maximum Intermittent |
115°C [240°F] |
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1)Cold start = Short term t > 3 min, p ≤ 50 bar [725 psi], n ≤ 1000 min-1 (rpm).
2)At the hottest point, normally case drain port.
© Danfoss | November 2021 |
BC152886483265en-000711 | 9 |
Technical Information
Series 90 Axial Piston Motors
Minimum |
is the lowest input speed recommended during engine idle condition. Operating below |
speed |
minimum speed limits the pump’s ability to maintain adequate flow for lubrication and |
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power transmission. |
Rated speed |
is the highest input speed recommended at full power condition. Operating at or |
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below this speed should yield satisfactory product life. |
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Operating conditions between rated and maximum speed should be restricted to less |
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than full power and to limited periods of time. |
Maximum |
is the highest operating speed permitted. Exceeding maximum speed reduces product |
speed |
life and can cause loss of hydrostatic power and braking capacity. For most drive |
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systems, maximum unit speed occurs during downhill braking or negative power |
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conditions. |
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W Warning |
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Never exceed the maximum speed limit under any operating conditions. |
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During hydraulic braking and downhill conditions, the prime mover must be capable of providing sufficient braking torque in order to avoid pump over speed. This is especially important to consider for turbo-charged and Tier 4 engines.
For more information please see Pressure and Speed Limits, BC152886484313, when determining speed limits for a particular application.
Unintended vehicle or machine movement hazard. Exceeding maximum speed may cause a loss of hydrostatic drive line power and braking capacity.
Machine manufacturer is responsible to provide a braking system, redundant to the hydrostatic transmission, sufficient to stop and hold the vehicle or machine in the event of hydrostatic drive power loss. The braking system must also be sufficient to hold the machine in place when full power is applied.
Hydraulic unit life depends on the speed and normal operating — or weighted average — pressure that can only be determined from a duty cycle analysis.
System pressure is the differential pressure between high pressure system ports. It is the dominant
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operating variable affecting hydraulic unit life. High system pressure, which results |
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from high load, reduces expected life. |
Application |
is the high pressure relief or pressure limiter setting normally defined within the |
pressure |
order code of the pump. This is the applied system pressure at which the drive line |
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generates the maximum calculated pull or torque in the application. |
Maximum |
is the highest recommended application pressure and is not intended to be a |
working |
continuous pressure. Propel systems with application pressures at, or below this |
pressure |
pressure should yield satisfactory unit life given proper component sizing. |
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Application pressures above maximum working pressure will only be considered |
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with duty cycle analysis and factory approval. |
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Pressure spikes are normal and must be considered when reviewing maximum |
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working pressure. |
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10 | © Danfoss | November 2021 |
BC152886483265en-000711 |
Technical Information
Series 90 Axial Piston Motors
Operating Parameters
Maximum |
is the highest intermittent pressure allowed under any circumstances. Applications |
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pressure |
with applied pressures between rated and maximum require factory approval with |
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complete application, duty cycle, and life expectancy analysis. |
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Minimum low |
must be maintained under all operating conditions to avoid cavitation. |
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loop pressure |
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All pressure limits are differential pressures referenced to low loop (charge) pressure. |
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Subtract low loop pressure from gauge readings to compute the differential. |
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Under normal operating conditions, the rated case pressure must not be exceeded. During cold start case pressure must be kept below maximum intermittent case pressure. Size drain plumbing accordingly.
The auxiliary pad cavity of axial pumps configured without integral charge pumps is referenced to case pressure. Units with integral charge pumps have auxiliary mounting pad cavities referenced to charge inlet (vacuum).
Possible component damage or leakage.
Operation with case pressure in excess of stated limits may damage seals, gaskets, and/or housings, causing external leakage. Performance may also be affected since charge and system pressure are additive to case pressure.
The high temperature limits apply at the hottest point in the transmission, which is normally the motor case drain. The system should generally be run at or below the quoted rated temperature.
The maximum intermittent temperature is based on material properties and should never be exceeded.
Cold oil will generally not affect the durability of the transmission components, but it may affect the ability of oil to flow and transmit power; therefore temperatures should remain 16 °C [30 °F] above the pour point of the hydraulic fluid.
The minimum temperature relates to the physical properties of component materials.
Size heat exchangers to keep the fluid within these limits. Danfoss recommends testing to verify that these temperature limits are not exceeded.
For maximum efficiency and bearing life, ensure the fluid viscosity remains in the recommended range.
The minimum viscosity should be encountered only during brief occasions of maximum ambient temperature and severe duty cycle operation.
The maximum viscosity should be encountered only at cold start.
© Danfoss | November 2021 |
BC152886483265en-000711 | 11 |