Eaton Compressor & Fabrication C-STOV-MC001-E1 - Manual (Page 15)

EATON Char-Lynn Steering Catalog C-STOV-MC001-E1 July 2006 15
Special Features
and Application
Dual
Displacement
Description
The dual displacement
steering control unit allows
manufacturers of off road
vehicles to retain manual
steering capabilities while
reducing the number of
components in their system.
By using two displacements
in one unit we offer a better
solution to manually steer a
vehicle in an unpowered
mode without the need of a
back-up power system—
resulting in a more
economical machine.
The dual displacement
steering unit uses two
gerotors and a pressure
controlled logic valve. The
logic valve switches between
two displacements, one
displacement for manual
steering and the total of both
displacements for powered
operation. The logic valve is
spring returned to the
smaller manual
displacement when inlet
pressure falls below 8 bar
[120 psi]. Above 8 bar [120
psi] the logic valve connects
both gerotors to provide full
powered displacement.
Manual steering capabilities
in unpowered mode
• Eliminates the need of
a back-up emergency
system.
• Engages the small
displacement in an
unpowered mode and
allows manual steering.
• Allows vehicles to meet
ISO/TUV road regulations
without the need of the
currently used
emergency system.
Performance in powered mode
• Both gerotors are
engaged to steer the
vehicle.
• Same performance as
other Char-Lynn
steering units.
Additional Features
• Steering circuit: Load
Sensing Dynamic Signal
• Max. system pressure:
241 bar [3500 psi].
• Valve options and other
features: same as those
available on Series 10
(single displacement)
units
DISPLACEMENT CHART:
Gerotor 1 Gerotor 1 and 2 Gerotor 1 Gerotor 1 and 2
Manual displ. Powered displ. Manual displ. Powered displ.
in 3 /rev in 3 /rev cm 3 /rev cm 3 /rev
3.6 9.5 60 156
3.6 10.9 60 179
3.6 12.5 60 205
3.6 13.3 60 218
3.6 14.9 60 244
For any other displacement please see your Eaton Representative.
0
0 15
Input Speed RPM
Manual 60 cm 3 /r [3.6 in 3 /r]
Powered 244 cm 3 /r [14.9 in 3 /r]
Flow vs RPM (for each operating mode)
S
tee
ring Flow
G
PM
S
tee
ring Flow l/min
30 45 60 75 90 60 105 120
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
0.5
1.0
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.5
6.0
7.0
7.5
Powe
red Mode
Po
w
er
ed
M
od
e
Powe
red Mode
Manual Mode Man
ual
Mod
e
Manual Mode
2.0
T LS P
Added Gerotor
Logic Valve
Manual Gerotor
R L