Danfoss OSPU Data sheet
Data Sheet
Hydraulic Steering Unit
OSPU
The OSPU is the latest addition to the Danfoss dual
displacement steering product line, complementing
the OSPD for responsive, easily maneuverable
machines of most sizes. Each unit in the complete
steering range combines superior performance with
the highest standards of safety, operator comfort and
low noise levels.
Danfoss has designed the OSPU as an alternative to
dual displacement steering units. Due to its unique
flow-amplifying capability (up to 1:4), the unit delivers
best-in-class manual steering over a wide application
range – the compact design easing installation.
A new progressive displacement option secures
smooth steering performance in both slow and fast
steering modes, while maintaining optimal
controllability, precision and operator comfort. The
steadily increasing flow, which corresponds to
steering speed, contributes to reduced operating
costs.
Features
Linear amplification versions
•
Displacement independent of steering
speed
•
Amplification factors: 1:2, 1:3 or 1:4
Progressive amplification versions
•
Steady increase in progressive flow at
higher steering speed
•
Increases productivity and driver
comfort
Installation Benefits
•
Small installation dimensions
Applications
•
Tractors
•
Backhoe loaders
•
Combines
•
Telescopic handlers
•
Wheel loaders etc.
Comprehensive technical literature online
at powersolutions.danfoss.com
©
Danfoss | April 2016 L1311984 | AI00000171en-US0101 | 1
OSPU program
0
5
10
15
20
25
30
35
40
45
0
Rpm
20 40 60 80 100
100 cc GS
Emergency steer
1:2 1:3 1:4 1:2
Progressive
l/min
P301 448
10
7.5
5
2.5
US gal/min
44 [1.73]
Ø 25.4 [1.0]
29 [1.14]
7.0 [0.28]
Ø82
±
0.3
[Ø3.23
±
0.01]
45˚
57 [2.24]
102 [4.02]
L R
T
P
4x M10 x 1.5; min. 15 deep
Ø 44.4
±
0.05
[Ø 1.74
±
0.001]
min. 7.1 [0.28]
B-B
B B
max 87 [3.43]
Ø91 [3.58]
47 [1.85]
44 [1.73]
L1
A-A
2.8 [0.11]
85 [3.35]
LS
51 [2.01]
A
A
LS
(4x)Ø29 [1.14]
min. 15
[0.59]
min 11.5
[0.45]
35 [1.38]
38 [1.50]
L2
min Ø22
[0.87]
P301 447
•
LS Dynamic (Load Sensing Non Reaction)
OSPU specifications
Displacement, gear sets
(Emergency steer)
Amplification factors Linear 1:2, 1:3 or 1:4
Displacement amplified 120 - 500 cm3/rev [7.32 - 30.51 in3/rev]
Max. system pressure/
max. P-T port pressure
Max. back pressure /
max T-port pressure
Max. steering flow 50 l/min [13.21 US gal/min]
Input torque 0.8 - 4 N·m [7.08-35.40 lbf·in]
Valve functions
possible
Port options P, T, L, R LS
*
OSPU with small gear wheel set and high pressure will have relative
high slippage values (slippage will be on level, for example, with OSPC
with same gear wheel set)
OSPU characteristic
Metered out flow for OSPU 100 shown with amplification factors
60, 70, 80, 100 or 125 cm3/rev
Progressive 1:2 (at 100 rpm steering wheel
speed)
210 bar [3045 psi]
*
40 bar [580 psi]
Pressure relief valve
Shock and suction valves
Check valve in P
Check valve function in LS
DIN 3852-2 G 1/2 G 1/4
ISO 6149-1 M18x1.5 M12x1.5
ISO 11926-1 3/4-16 UNF 7/16-20 UNF
possible.
Type
L
1
mm [in]
L
2
mm [in]
Weight
kg [lb]
60/xxx 137 [5.39] 7.8 [0.31] 5.3 [11.68]
70/xxx 138 [5.43] 9.1 [0.36] 5.4 [11.90]
80/xxx 139 [5.47] 10.4 [0.41] 5.5 [12.13]
100/xxx 142 [5.59] 13.0 [0.51] 5.6 [12.35]
125/xxx 145 [5.71] 16.2 [0.64] 5.8 [12.79]
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
2 | © Danfoss | April 2016 L1311984 | AI00000171en-US0101
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