Program Information Mobile Hydraulics, Mobile ... - ERGOVIAL

66 Mobile Controls
4
Hydrostatic Steering Units LAG
Steering unit LAG
U The steering unit LAG is used
in the hydraulic steering circuits
of motor vehicles and
mobile machines with high
axle loads and driving speeds
of up to 50 km/h.
U Even heavy vehicles can be
steered without difficulty with
the aid of a steering unit. The
absence of a mechanical connection
between steering unit
and steered axle makes it possible
to realize designs which
would be impossible with conventional
steering systems.
U The steering unit contains all
the necessary valves for safeguarding
the steering unit and
cylinder in the hydraulic steering
circuit, thus eliminating
the need for additional piping.
U Vehicles with LAG steering unit
can also be steered manually if
the hydraulic pump fails, as
the steering unit then serves as
manual pump to the steering
cylinder.
LAGC
The delivery volume in servo mode
(supplied by the hydraulic pump)
and in emergency mode (supply
failure) is the same in the LAGC
unit.
LAGU and LAGZ
The force required on the steering
wheel is reduced through the
change in transmission ratio when
the LAGU and LAGZ units are
installed. In many cases, this is the
essential prerequisite for compliance
with permissible ceilings.
A second steering pump is often
unnecessary.
The steering unit LAGU operates
according to the principle of 2:1
chamber isolation. The delivery volume
is halved in emergency operation.
The installed dimensions are
identical with those of the LAGC
unit for the same sizes.
The steering unit LAGZ operates
with two rotor sets in servo operation.
One rotor set is deactivated
in emergency operation, thus
reducing the delivery volume.
The manual force is reduced
proportionally with the delivery
volume.
Rotor sets can be combined as desired
within the individual series,
thus permitting transmission ratios
of 2:1, 3:1, 4:1, ...
Detailed information:
Version LAGC RE 14 365
Version LAGU RE 11 867
Version LAGZ RE 11 868
Size 40 50 63 70 80 100 125 140 160 200 250 320 400 500 630
Types LAGC • • • • • • • • • • • • • • •
LA GU • • • • • •
LA GZ • • • • •
Versions ON = open center-non reaction, OR = open center-reaction, LS = load sensing-non reaction and -reaction
Flow qV 50 L/min (higher values on request)
Operating pressure pmax 175 bar (higher values on request)