2018 International Forest Industries IFI April May 2018 Digital | Page 48

Our customers are
very satisfied with
this function and the
high comfort of the
cabin
Uwe Hempen-Hermeier,
Jenz
For many years, the chipper
manufacturer Jenz has been
building its chipping units on
truck chassis. In addition to
Chippertrucks, where the chipper
is driven by the truck engine, so-
called ‘hybrid machines’ are also
produced. At Jenz, ‘hybrid’ refers
to the double-engine technology
used. The machines are driven by
the truck engine and a separate
add-on motor.
While the smaller chipper series
HEM 583 and HEM 593 are offered
with both one and two engines, the
largest series HEM 821 DQ is only
available in the latter version. The
chipping units are designed with an
infeed opening of 1,200 mm x 820
mm for the crushing of hardwood
to 60 cm and softwood up to 80
cm.
“The reason for this is quite
simply that the removable power
of the truck engine would not be
46 International Forest Industries | APRIL / MAY 2018
enough for the large chipping
unit,” Managing Director of the
family-owned company, Uwe
Hempen-Hermeier, explained. “We
therefore only offer the HEM 821
DQ with double-engine technology.
“Nevertheless, there are
of course various equipment
options.”
The most noticeable difference
in equipment is the driver’s cab.
The HEM 821 DQ-Truck can be
equipped with a cabin with mowing
window or a separate crane cab.
The HEM 821 DQ Cobra hybrid, on
the other hand, is equipped with
a swivelling and optionally also
liftable Cobra cabin. This results in
a difference in operation.
If the customer wishes a
standard truck cabin and operates
the chipper out of the crane cabin,
the machine operator has a very
good view of the working area due
to the high position of the crane
cabin.
“Customers praise the good
overview here, but criticize the
comfort of the cabin, which is
very small and not user-friendly,
especially at high temperatures
in the summer,” explains Uwe
Hempen-Hermeier. “The cabin
with mowing window is a bit more
comfortable here, but the view is
of course somewhat more limited
than from the crane cabin.”
In the Cobra version, a CLAAS
X10 is built instead of the MAN
standard cabin. This means that
there is only one work space
for driving and chipping. When
working, the cab is simply turned
in the desired direction, a change
from the transport to the work seat
is no longer necessary.
“Our customers are very
satisfied with this function and the
high comfort of the cabin.”
As standard, both vehicle
versions are built on a
manoeuvrable MAN TGS 8x4-4
chassis. The chassis is sufficient for
most applications.
“Finally, you have to ask
yourself how much capability is