PRONAR T900, Operator'S Manual, Page: 81 / 153

SECTION 4 Pronar T900
4.13
support the front beam (2) of the trailer on both sides of the drawbar (in the
places indicated by arrows) using supports of a proper height.
support the drawbar underneath using a jack shaft,
remove the rocker arm lug (5) by loosening the mounting bolts (6) on the
drawbar mounting plate,
while adjusting the lifting jack, transfer the rocker arm lug (5) to the correct
height (there are 3 possible settings) and secure with bolts (6).
You can also adjust drawbar position by transferring the rocker arm pin (7) to the
corresponding hole of the spring (4) rocker arm to obtain different height settings. The
mounting height and position of the drawbar should be individually matched to tractor hitch.
4.3.4 SETTING THE WHEEL STEERING SYSTEM
Pronar T900 trailer with the hydraulic steering system should be hitched using suitable and
certified tractor hitches equipped with two additional ball hitches (or attachments) with a ball
diameter of Ø50 arranged according to the tractor hitch system diagram – see detail (A)
figure (4.3). These hitches are designed for connecting to strings controlling the hydraulic
cylinders responsible for turning the first wheel axle and the third wheel axle. The connection
of the trailer steering system with the tractor meets the requirements of ISO 26402 standard.
During the first hitching of the trailer to the tractor, check correctness of operation of the
wheel steering system. If system operation is found to be incorrect, follow these steps:
position the agricultural tractor in front of the trailer's drawbar,
using the support (5), set the height of the drawbar hitching eye (2) in relation
to the tractor hitch system,
reverse the tractor, connect the drawbar hitching eye (2) to the tractor hitch
(6),
check the hitch lock protecting the trailer against accidental
unhitching,
the drawbar's cylinders (8) should be set halfway the cylinder stroke so that
their total length is approximately 1270 mm,