Danfoss Reverse Displacement Motor Data sheet
Data Sheet
Open Circuit Piston Motors
Reverse Displacement Motor (RDM)
For more than 40 years, Danfoss has been developing
state-of-the-art components and systems for mobile
machinery used in off -highway operations around
the world. We have become a preferred supplier by
offering the best of what really matters: the hardware
inside your vehicle application.
The Reverse Displacement Motor (RDM) is designed
for use in mobile open circuit applications. It offers
reverse functionality without external valves, and
provides system robustness with available anticavitation and shock valves. The RDM uses the
existing and proven technology of the Danfoss L/K
motor. These motors have been optimized with
regard to options, life, package size and installed cost.
The RDM is a two-position reversing motor, with
smooth, shift-on-the-go capability. The integrated
proportional shifting valve uses system pressure. It
allows reversing functionality without external valves
and external pressure supply.
Features
Designed for Durability and Flexibility
•
Especially designed for open circuit
applications with a need for reverse
functionality
•
Five displacements allow the optimum
selection of a hydraulic motor to fit your
application
•
Reliability - uses existing and proven
technology of Danfoss L&K motors
Installation and Packaging benefits
•
Short and compact
•
High efficiency - nine piston rotating
groups with an 18 degree maximum
angle
•
Uses system pressure for shifting – no
external pressure supply needed
•
Integrated shifting valve enables
reversing – no external valves needed less hoses - less losses - simple and
clean installation
•
12 VDC and 24 VDC valves
Wide Range of Options
•
Fail Safe: Without control signal, the
motor is biased to maximum forward
speed
•
Damped shifting from reverse to
forward
•
Shaft options with dust seal protector
•
Integrated system protection - anticavitation and shock valve
•
High capacity bearings to withstand
axial fan forces
•
Complimentary to Danfoss Series 45
open circuit pumps with electronic
proportional control
•
PLUS+1® micro controller with fan drive
software available
•
This motor has the capability to be held
at or near neutral for potential added
system power savings or faster heating
of the engine at start-up
•
Variety of porting options allow for
easier system configurations system
configurations
Metric O-Ring boss
‒
SAE O-Ring boss
‒
Split flange
‒
•
A speed sensor is available
Applications
•
Fan Drives with reverse functionality
•
Conveyers
•
Etc.
Comprehensive technical literature online
at powersolutions.danfoss.com
©
Danfoss | April 2016 L1410616 | AI00000188en-US0202 | 1
P108732
T3
T2
T1
Temperature
Sensors
Reservoir
Microcontroller
(PLUS+1TM)
Diesel Engine
Engine Control
Module (ECM)
Variable Pump
(Series 45)
Reverse
Displacement
Motor (RDM)
Filter
Data Sheet
Reverse Displacement Motor (RDM)
Technical Specifications
Parameter Unit LM25 LM30 LM35 KM38 KM45
3
Displacement (maximum)
Weight
Theoretical torque
cm
[in3]
kg [lb]
N·m/bar
[lbf·in/1000 psi]
Output speed Rated min-1 (rpm) 3400 3500 3600 3600 3500
Max. 3950 4150 4300 4000 3900
System pressure
(1)
Max. bar [psi] 350 [5075] 350 [5075] 325 [4715] 350 [5075] 350 [5075]
Case pressure Rated bar [psi] 0.5 [7] above outlet pressure, 2 [29] absolute pressure
Max. 2 [29] above outlet pressure, 6 [87] absolute pressure
Voltage V
Current 12 V
24 V
DC
DC
DC
mA 1500
Connector - DEUTSCH connector DT04-2P
(1)
Refer to L and K Frame Variable Motors Technical Information 520L0627 for pressure definitions
Fan Drive Circuit
25
[1.50]
30
[1.83]
35
[2.14]
38
[2.32]
45
[2.75]
17.5 [38.6]
0.40 [244] 0.48 [293] 0.56 [347] 0.60 [366] 0.72 [439]
12, 24
750
2 | © Danfoss | April 2016 L1410616 | AI00000188en-US0202
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