PRONAR T683, Operator'S Manual, Page: 94 / 147

Pronar T683 SECTION 4
4.22
The trailer is equipped with hydraulic tipping system as well as the frame and the load box
with proper structure allowing tipping sideways and to the rear. Tipping of the load box is
controlled from driver's cab using external tractor hydraulic system selective control valve.
Unloading trailer is performed in the following sequence:
tractor and trailer must be placed to drive forwards on flat and hard ground,
immobilise tractor and trailer with parking brake; wheel chocks may be used to
provide additional protection,
if the load box tipping direction was not planned and set before, place tipping
pins (1) and (2) – figure (4.3), (pins connecting load box with lower frame) on
the unloading side and secure them properly with cotter pins;
pins and individual sockets are designed so that it is impossible to
place them on the opposite diagonal side of the load box, which would
damage the trailer,
bracket of correctly locked front tipping pin is vertical (A),
bracket of correctly locked rear tipping pin is directed sideways (B) –
figure (4.3),
if the load box tipping direction was planned and set before, check that tipping
pins are properly secured and closing locks are properly unlocked.
depending on how the walls and wall extensions are opened, release the
respective wall locks or unlatch the chute slide gate in the rear wall
(depending on the intended direction and method of unloading);
When opening side walls with wall extensions, first open the middle
wall locks (2) – see figure (4.4) and (4.5), and then unlock lower
locking hooks. Lever (1) - figure (4.4) is used to unlock the lower
locking hooks of the front side wall, while lever (1) – figure (4.5) is
used to unlock the lower locking hooks of the rear side wall.
place the control lever of the hydraulic tipping system circuits in position 1 --
tipping of the first trailer,
initiate tipping of the load box using the selective control valve lever in the
operator's cabin,