Danfoss T90 Transit Mixer Drive System User guide
MAKING MODERN LIVING POSSIBLE
Technical Information
Series T90
Transit Mixer Drive System
powersolutions.danfoss.com
Technical Information Series T90 Transit Mixer Drive System
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Series T90 |
General Description....................................................................................................................................... |
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Transit Mixer Drive |
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Transit Mixer Pump |
General Description....................................................................................................................................... |
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Series T90 |
Technical Specifications................................................................................................................................ |
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Operating Parameters................................................................................................................................... |
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System Design Parameters........................................................................................................................ |
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Features............................................................................................................................................................ |
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Control.............................................................................................................................................................. |
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Inatallation Drawings.................................................................................................................................. |
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Transit Mixer Motor |
General Description..................................................................................................................................... |
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Series 90 |
Inatallation Drawings.................................................................................................................................. |
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L1207419 • Rev BA • October 2014 |
Technical Information |
Series T90 Transit Mixer Drive System |
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General Description |
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General |
The new Transit Mixer Drive System from Danfoss is based on more than 30 years‘ |
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experience in the worldwide use of drum drive systems in transit mixers. Innovative |
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electronics suitable for mobile use, combined with reliable technology, are the result of this |
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development. |
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Danfoss offers, as a single supplier, complete systems for drum sizes from 6-18m³ |
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[8-24 yd3] from one source. |
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The smart system resets the standard relating to the market requirements for reliability and |
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simple handling. |
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Product Features |
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Hydrostatic transmission |
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- overall size 055, 075 and 100 cm³ [3.35, 4.49 and 6.10 in3] |
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- rotational group proven over millions in units |
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- noise reduction by 12 dB (A) |
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- exemplary reductions in overall volume and weight |
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Operating units |
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- external and cab-mounted station |
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- simple installation and wiring |
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- electric plug connections suitable for mobile use |
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- no adjustments,“Plug and Perform“ |
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• direction of rotation and speed via latched rotary switch on the cab-mounted or |
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external station |
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• identical operating elements on the cab-mounted and external stations |
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• external station pushbutton: STOP/START the drum |
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• external station pushbutton: STOP/START the drum with the cab-mounted station |
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active |
System Features |
• cab-mounted station pushbutton: change over to external station and vice versa |
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• status reporting from the cab-mounted and external stations via LEDs |
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• active cab-mounted station during transit means the external station is switched off |
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• constant drum speed with variable pump-drive speed |
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• constant drum speed, irrespective of the loading of the drum
• exact repeatability of the drum speed by means of a latched rotary switch
• automatic maximum drum-speed limitation
A convincing, reliable and smart system solution from Danfoss which (at present) is still missing from your transit mixer?
Contact us! Our worldwide sales organization is ready to serve you.
L1207419 • Rev BA • October 2014 |
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Technical Information Series T90 Transit Mixer Drive System
General Description
Series T90 Family of
Pumps
Danfoss provides Series T90 as an advanced type of axial piston variable displacement pumps for concret mixers, the development of which is based on more than 30 years of our experience in applying our products in the global market. The new T90 axial piston variable displacement pumps are derived from the sophisticated earlier type of S90 pumps, and are suitable for extended concrete mixer 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 which is manually controlled to provide system replenishing and cooling oil flow, as well as control fluid flow.
•Series T90 axial piston pumps are designed with the most advanced technology
•With optional sizes 055, 075, 100
•Installation: SAE standard flange
•Axial piston design of high effeciency
•Proved reliability and excellent performance
•Compact, light weight
•Worldwide sales and services
•Metric standard threads for main ports (A and B)
Design |
Series T90 pump cross-section |
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Slider block |
Servo piston |
Servo arm Piston |
Slipper |
Feedback linkage
Bushing |
Cradle bearing |
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Cylinder block |
Roller bearing |
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Shaft seal |
Rear bushing
Input shaft
Charge pump |
Swash plate |
Cradle guide |
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L1207419 • Rev BA • October 2014 |
Technical Information Series T90 Transit Mixer Drive System
General Description
Pictorial Circuit Diagram This configuration shows a hydrostatic transmission using a Series T90 axial piston variable displacement pump and a Series 90 fixed displacement motor.
Control handle
Reversible variable displacement pump
Input shaft
Pump swashplate
Displacement control valve
Ori ce check valve
Servo control cylinder
Heat exchanger bypass valve
Reservoir
Heat Exchanger 
Charge pressure relief valve Multi-function valve
To 
pump case
Vacuum gauge
Purge relief valve
P400053
Fixed displacement motor
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Charge pump |
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Multi-function valve |
Output shaft |
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Motor swashplate |
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Servo control cylinder |
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Loop ushing valve |
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Pump |
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Motor |
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working loop (high pressure) |
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working loop (low pressure) |
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Suction line |
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Control uid |
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Case drain uid |
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System Schematic
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M3 |
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L2 |
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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 |
L2 |
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L1 |
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M2 |
P400054 |
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L1207419 • Rev BA • October 2014 |
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Technical Information Series T90 Transit Mixer Drive System
Technical Specifications
Features
Feature |
Unit |
055 |
075 |
100 |
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Displacement |
cm³ |
55 |
75 |
100 |
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[in³] |
[3.35] |
[4.59] |
[6.10] |
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Flow at rated speed |
l/min |
215 |
236 |
300 |
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(theoretical) |
[US gal/min] |
[57] |
[62] |
[79] |
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Torque at maximum |
N•m/bar |
0.88 |
1.19 |
1.59 |
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displacement (theoretical) |
[lbf•in/1000 psi] |
[530] |
[730] |
[970] |
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Mass moment of inertia of |
kg•m² |
0.0060 |
0.0100 |
0.0171 |
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rotating components |
[slug•ft²] |
[0.0044] |
[0.0074] |
[0.0126] |
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Weight (with control opt. MA) |
kg [lb] |
40 [88] |
49 [108] |
68 [150] |
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Mounting (per SAE J744) |
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Flange SAE C |
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Rotation |
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Right hand or Left hand rotation |
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Main ports: 4-bolts split-flange |
mm |
25.4 |
25.4 |
25.4 |
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(per ISO 6162) |
[in] |
[1.0] |
[1.0] |
[1.0] |
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Main port configuration |
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Twin Ports |
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Case drain ports |
UNF thread (in.) |
1.0625–12 |
1.0625–12 |
1.0625–12 |
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(SAE O-ring boss) |
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Other ports |
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SAE O-ring boss |
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Input Shafts |
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Splined, 21 teeth |
Splined, 23 teeth |
Splined, 23 teeth |
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Operating Parameters
Parameters |
Unit |
055 |
075 |
100 |
Input speed |
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Minimum |
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400 |
400 |
400 |
Rated |
min-1(rpm) |
3900 |
3150 |
3000 |
Maximum |
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4250 |
3350 |
3200 |
System pressure |
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Continuous |
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400 [5800] |
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Maximum |
bar [psi] |
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420 [6090] |
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Minimum low loop pressure |
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10 [650] |
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Suction port pressure (charge pump inlet) |
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Minimum |
bar (abs) |
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0.7 [9] |
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Minimum(cold start) |
[in. Hg vac.] |
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0.2 [24] |
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Case pressure |
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Continuous |
bar [psi] |
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3.0 [44] |
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Maximum(cold start) |
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5.0 [73] |
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L1207419 • Rev BA • October 2014 |
Technical Information Series T90 Transit Mixer Drive System
Technical Specifications
Fluid Specifications
Viscosity mm²/sec (cSt) [SUS]
Minimum |
7 [49] |
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Recommended range |
12-80 [70-370] |
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Maximum |
1600 |
[7500] |
Temperature range °C [°F] |
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Minimum |
-40 |
[-40] |
Rated |
104 |
[220] |
Maximum intermittent |
115 |
[240] |
Filtration |
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Cleanliness |
22/18/13 or higher standard ISO 4406 |
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Efficiency (suction line filtration) |
β35-45=75 (β10≥2) |
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L1207419 • Rev BA • October 2014 |
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