Eaton Compressor & Fabrication C-STOV-MC001-E1 - Manual (Page 11)

EATON Char-Lynn Steering Catalog C-STOV-MC001-E1 July 2006 11
Hydraulic Circuit
Explanation
Work Circuits:
Non-Load Reaction
and Load Reaction
P
R L
T
Closed Center System
Non-Load Reaction Circuit
Direct
Mechanical
Link Gerotor
Metering
Mechanism
Steering
Control
Unit
Pressure and Flow
Compensated Pump
Non-Load Reaction
A non-load reaction steering
unit blocks the cylinder ports
in neutral, holding the axle
position whenever the
operator releases the
steering wheel.
Load Reaction
A load reaction steering unit
couples the cylinder ports
internally (in the neutral
position) with the meter
gear set. Axle forces are
then allowed to return the
steering wheel to its
approximate original
position. Comparable to
automobile steering,
gradually releasing the
wheel mid turn will allow
the steering wheel to spin
back as the vehicle
straightens. The cylinder system used
with load reaction units
must have equal oil
volume displaced in both
directions. The cylinders
should be a parallel pair (as
shown) or one double rod
end unit. Do not use with a
single unequal area
cylinder system.
P
R L
T
Open Center System
Load Reaction Circuit
Direct
Mechanical
Link Gerotor
Metering
Mechanism
Steering
Control
Unit
Fixed
Displacement
Pump