Just chip: one machine for everything!

By MEq April 23, 2021 18:00

The Chippertruck hybrid is the flagship among the JENZ mobile chippers. Equipped with the most powerful dual engine technology and more than 1,100 hp system performance, the most powerful JENZ Chippertruck leaves nothing to be desired. The new HEM 922 is the successor to the previous HEM 821. The new chipper boasts many optimizations from the feed area to user-friendliness, making it even more flexible to use.

“When people think of large chippers, they often think of huge woodpiles in heating plants,” explains Hans Heinrich Hermeier, product manager and junior manager at JENZ. “We know that our customers are often caught between maximum throughput in the heating plant and the greatest possible flexibility in the forest or on the road. This is precisely the point we have addressed with the new HEM 922 chipping unit, which has been specially built for the self-propelled chipper.”

Optimized draw-in
Amongst other things, the new Chippertruck hybrid scores point with increased intake height, now 900 mm, and a noticeably more aggressive draw-in behavior. Many changes were made to the draw-in: table geometry and inclination of the draw-in table, draw-in speed, top, and bottom roller geometry, and position.

“Overall, the machine is now easier to feed and chews better. We call this effect ‘drop and forget’. This means that the driver puts the material down (“drop”) and can fetch new material more quickly,” explains Hermeier, who is visibly proud of the new top model. In addition to easier feeding, the woodchip quality increases because the material is fed to the drum in a more controlled manner. “The changes made have a very positive effect, especially when chipping impact debris and pruning shrubs,” summarises the product manager, who is himself an active test driver.

Maintenance made easy
Maintenance accessibility has also been optimized: “We have focussed not only on the fully integrated tool concept but also on daily maintenance and cleaning of the machine in a similar way to the single-engine Chippertruck.” In detail, this includes the professional tool concept with a swiveling toolbox and many tool holders, and also various access ladders and storage space options for safe work on the machine among other things.

Performance without end
The most powerful JENZ mobile chipper has a system power of up to 1,100 hp thanks to dual engine technology. The drive concept has been taken over from its predecessor, which impresses not only with unbridled power but also with simplicity. “The Caterpillar auxiliary engine has only one task: chipping! It passes on almost all of its torque of approx. 3500 Nm to the drum via a 10-groove drive belt. The complete machine hydraulics and the propulsion drive are supplied via the HGV engine. That means the CAT is only running when it is chipping, not otherwise,” says Hermeier.

Agricultural tires for even more off-road mobility
The off-road mobility required in practice can be ensured by single agricultural tires on the drive axles. This means that the self-propelled vehicle is now completely on single tires. “The elimination of the dual tires eliminates the need for cleaning when switching to road travel, and the self-cleaning agricultural tires give the machine unimagined off-road capabilities,” says a delighted Hans Heinrich Hermeier. “You won’t believe it if you don’t see it for yourself!”

Licensing without a special permit
There have also been some changes in the area of licensing. “Even with a full tank of 900 liters of diesel we are below 32 tonnes and therefore do not need a special permit. With truck driving comfort and corresponding consumption and up to 80 km/h, the HEM 922 is therefore extremely flexible on the road.”