2018 International Forest Industries December 2017 January 2018 | Page 40

The Jenz HEM 593 chipper
Jenz has been supplying chipper
trucks in different versions since
2006. A whole series of further
developments, which relate
particularly to the chipping unit,
has been carried out over the
past 10 years. Most recently,
improvements to the drive concept
were unveiled at Agritechnica 2017
under the tagline, ‘Chippertruck
2.0’.
Jenz continues to rely on Man as
a carrier vehicle.
“As standard, we build on the
Man TGS 28,500 6x4-4 or Man
TGS 33,500 6x6 in the Euro 6c
emissions class with 500 hp,”
explained Stefan Müller, Research
and Development Manager.
“We now have maximum 2,500
Nm torque available instead of
the previous 2,300 Nm. That’s
equivalent to the torque produced
by the old Euro5 engines with 540
hp.”
In addition to more power, the
Chippertruck 2.0 also stands out
thanks to increased operating
comfort.
“The new automatic
transmission plays a major role in
this, because the machine operator
no longer has to change gears,”
according to Müller.
The large gear spread ensures
outstanding start-up characteristics
with simultaneous low, fuel-saving
engine speeds at higher transport
speeds. “And that is not exactly
unimportant for a chipper, because
the transport costs should never
be underestimated.” Jenz has also
38 International Forest Industries | DECEMBER 2017 / JANUARY 2018
revised the chipper drivetrain to
increase operating comfort during
chipping. “Our customers have
been requesting that the machine
can be driven forward without
disengaging for a long time now,”
explained Müller.
Up to now this was not possible
with the larger HEM 583 and
593 models since the power was
transferred to the chipper via the
auxiliary drive on the power divider.
In order to solve this problem Jenz
is now using the most powerful
NMV on the market.
“The huge advantage of this is
that the NMV auxiliary drive can be
disengaged both at a standstill and
while travelling under load. This
means that the vehicle can drive
forward without disengaging, and it
can therefore be moved extremely
quickly, simply and powerfully over
short distances. This is a huge
The hydraulics of the Jenz HEM
593 have been revised on the
chipping unit itself