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T90 055
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Danfoss T90 055, T90 075, T90 100 User guide

Technical Information
Series T90 Axial Piston Motors
Size 055/075/100
www.danfoss.com
Series T90 Axial Piston Motors
Revision history Table of revisions
Date Changed Rev
August 2021 Updated System pressure 0302
July 2021 Updated System pressure 0202
October 2020 4th edition - DITA layout, changed document number from BC00000366 0201
October 2017 3rd edition 0102
May 2016 2nd edition 0101
February 2016 1st edition AA
2 | © Danfoss | August 2021 BC195786485247en-000302
Series T90 Axial Piston Motors

Contents

General Description
Series T90 Family of Pumps and Motors.................................................................................................................................. 4
Fixed Displacement Motor, SAE Mount....................................................................................................................................5
Series T90 Pictorial Circuit Diagram...........................................................................................................................................6
System Schematic............................................................................................................................................................................ 6
Technical Specifications
Overview..............................................................................................................................................................................................7
Features and Options......................................................................................................................................................................7
Specifications.....................................................................................................................................................................................7
Operating Parameters.....................................................................................................................................................................8
Fluid Specification............................................................................................................................................................................8
Operating Parameters
Input Speed........................................................................................................................................................................................ 9
Independent Braking System................................................................................................................................................. 9
System Pressure................................................................................................................................................................................9
Case Pressure...................................................................................................................................................................................10
Temperature.................................................................................................................................................................................... 10
Viscosity.............................................................................................................................................................................................10
System Design Parameters
Fluid and Filtration........................................................................................................................................................................ 11
Independent Braking System....................................................................................................................................................11
Reservoir............................................................................................................................................................................................11
Overpressure Protection............................................................................................................................................................. 12
Case Drain.........................................................................................................................................................................................12
Sizing Equations............................................................................................................................................................................. 12
Formulas...................................................................................................................................................................................... 12
External Shaft Loading and Bearing Life................................................................................................................................12
Applications with external shaft loads..............................................................................................................................13
Features and Options
Loop Flushing..................................................................................................................................................................................15
Speed Sensor...................................................................................................................................................................................16
Shaft Options...................................................................................................................................................................................18
Installation Drawings
T90M55 Fixed Motor SAE Mount..............................................................................................................................................19
T90M75 Fixed Motor SAE Mount..............................................................................................................................................21
T90M100 Fixed Motor SAE Mount........................................................................................................................................... 23
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Danfoss | August 2021 BC195786485247en-000302 | 3
Series T90 Axial Piston Motors

General Description

Series T90 Family of Pumps and Motors

Series T90 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 T90 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 T90 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 T90 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 T90 – advanced technology today
•
Three sizes of variable displacement pumps
•
Three sizes of fixed displacement motors
•
SAE mount configurations
•
Efficient axial piston design
•
Proven reliability and performance
•
Compact, lightweight
•
Worldwide sales and service
•
4 | © Danfoss | August 2021 BC195786485247en-000302
P100 490E
Loop flushing valve
Valve plate Piston
Roller bearing
Output shaft
Fixed swashplate
Cylinder block
Model-No./Ident-No.
Model Code
Serial-No.
Made in P.R.C
Model Number
Serial Number
Model Code
Place of Manufacture
C - 00 - 13 - 67890
501829
P400717
T90 M 055 NC 0 N 8 N 0 C6 W 00 MBX 00 00 F0
Series T90 Axial Piston Motors
General Description

Fixed Displacement Motor, SAE Mount

Cross section
Name plate
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Danfoss | August 2021 BC195786485247en-000302 | 5
Pump Motor
Working loop (low pressure)
Control fluid
Suction line
Case drain fluid
Working loop (high pressure)
Motor swashplate
Loop flushing valve
Displacement control valve
Heat exchanger bypass valve
Reservoir
Vacuum gauge
Purge relief valve
Fixed displacement motor
Output shaft
Multi-function valve
Charge pump
To pump
case Servo pressure relief valves
Servo control cylinder
Pump swashplate
Input shaft
Reversible variable displacement pump
Servo control cylinder
Heat exchanger
Multi-function valve
Charge pressure relief valve
Orificed check valve
Control handle
P102 000
M
BB
L2
M2
M1
M4
M5
M3
A A
S
L2 M1
M2
L1
M3
P104 286E
Series T90 Axial Piston Motors
General Description

Series T90 Pictorial Circuit Diagram

The circuit diagram shows a hydrostatic transmission using a Series T90 axial piston variable displacement pump and a Series T90 fixed displacement motor.

System Schematic

6 | © Danfoss | August 2021 BC195786485247en-000302
Series T90 Axial Piston Motors

Technical Specifications

Overview

Specifications for the Series T90 motors are listed here for quick reference. For definitions and additional information, see Operating Parameters on page 8.

Features and Options

Motor type In-line, axial piston, closed loop, positive displacement motors Direction of rotation Bi-directional, see outline drawings for rotation vs. flow direction information Installation position Discretionary: Housing must be filled with hydraulic fluid Other system requirements Independent braking system, overpressure protection, suitable reservoir, proper
Parameter 055 MF 075 MF 100 MF
Types of mounting (SAE flange size per SAE J744) SAE C SAE C SAE C Port connections Twin, axial Twin, axial Twin, axial Output shaft options Spline Spline Spline Control options — — — Loop flushing • • • Speed sensor o o o
filtration

Specifications

• Standard o Optional — Not available / not applicable
Parameter 055 MF 075 MF 100 MF
Swashplate Fixed Fixed Fixed Max. displacement
cm³/rev [in³/rev] Maximum corner power kW [hp] 142 [190] 175 235] 224 [300] Theoretical torque
N•m/bar [lbf•in/1000 psi] Weight
kg [lb] Mass moment of inertia
kg•m² [slug•ft²]
SAE 22 [49] 26 [57] 34 [74]
55 [3.35] 75 [4.57] 100 [6.10]
0.88 [530]
0.0060 [0.0044] 0.0096 [0.0071] 0.0150 [0.0111]
1.19 [730]
1.59 [970]
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Danfoss | August 2021 BC195786485247en-000302 | 7
Series T90 Axial Piston Motors
Technical Specifications

Operating Parameters

Parameter Unit 055 MF 075 MF 100 MF Speed limits
Continuous (max. disp.) min-1(rpm) 3500 3150 3000 Maximum (max. disp.) 3700 3350 3200 Continuous (min. disp.) — — — Maximum (min. disp.) — — —
System pressure
Maximum working pressure bar [psi] 350 [5076] Maximum pressure 420 [6092]
Flow ratings
Rated (max. disp., rated speed) l/min [US gal/min] 175 [46] 236 [62] 300 [79] Maximum (max. disp., max. speed) 185 [49] 251 [66] 320 [85]
Case pressure
Continuous bar [psi] 3 [44] Maximum (cold start) 5 [73]

Fluid Specification

Viscosity
Intermittent Minimum Recommended range Maximum (cold start)
1)
= Short term t < 1 min per incident and not exceeding 2 % of duty cycle based load-life.
1)
5 [42 ]
7 [49 ]
12 – 80 [66 – 370 ]
1600 [7500 ]
Temperature
Minimum (cold start) Maximum continuous Recommended range Maximum Intermittent
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.
1)
2)
-40°C [-40°F]
104°C [220°F]
60 – 85°C [140 – 185°F]
115°C [240°F]
8 | © Danfoss | August 2021 BC195786485247en-000302
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