AGRITECHNICA FLUID POWER
SIMPLIFYING LOADSENSING HYDRAULICS
Transmitting a load signal from all of the
loads in a system back to a single LS pump or
by-pass compensator requires a network
of shuttle and or check valves. Using D03/
CETOP valves for directional control,
businesses are constrained by the four-port
interface pattern. These systems require an
additional three-ported load-shuttle to resolve
which port is operating, in addition to
a load-isolating check to prevent adjacent
functions from feeding back through the
load-sensing circuit. These accommodations
can signifi cantly increase the size and
machining cost of a manifold.
HydraForce fi ve-way proportional
directional and solenoid valves are purposebuilt
for load-sensing hydraulic systems. They
have an integrated load-sensing port that
90 iVTInternational.com September 2019
always connects to the loaded port, whether
that is A or B, so no additional load shuttle is
required. The load signal connects only when
energized, so there is no need for additional
valves to isolate the load from the sense line.
Two styles are available: The -57 style valves
have the sense line blocked in neutral,
whereas -58 style valves have the sense line
vented to tank in neutral.
Because the load-sensing port is blocked in
neutral, parallel 57-style valves that operate
discretely require no additional isolation.
A CVD can be dropped into the cavity below
the valve when simultaneous function is
required, without additional cross drilling.
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HydraForce
Hall 17, Stand H03
03
F L U I D P O W E R
BEST NEW VEHICLES AT AGRITECHNICA
KRAMER KL55.8T WHEEL LOADER
Kramer is unveiling a new telescopic wheel
loader for agriculture for the rst time at
Agritechnica 2019. e KL55.8T with
Z-kinematics falls into the 9-12 metric ton
Kramer
performance range. It expands the full
Hall 13, Stand C40
quality wheel loader to include the
advantages of a telehandler with increased load-over height, stacking
height, dumping height and reach. e machine has a bucket tipping load
of 5,500kg, stacking payload of 3,900kg, operating weight of 11,170kg and
bucket pivot point when extended of over 5.4 metres. In addition to loading
all agricultural machines and trailers, an important application area is the
loading of, for example, fodder mixing vehicles or biogas systems and
stacking bales.
“ is is the biggest all-wheel steer telescopic wheel loader on the market
today,” says Viktoria Sondermann, marketing team lead at Kramer. “With
the KL55.8T we o er a powerful wheel loader with a telescopic boom for
maximum reach, loading and stacking height. As part of the release of our
8 series, the machine impresses with maximum stability, maneuverability
and constant payload thanks to the undivided vehicle frame.”
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