PRONAR T679/3, Operator'S Manual, Page: 108 / 117

PRONAR T679/3 PRONAR T679/4 SECTION 5
5.34
values for the most frequently used bolt and nut connections are given in table (5.7). Given
values apply to non-lubricated steel bolts.
TABLE 5.7 Tightening torque for nut and bolt connections
5.8
(1)
8.8
(1)
10.9
(1)
THREAD
METRIC
Md [Nm]
M10 37 49 72
M12 64 85 125
M14 100 135 200
M16 160 210 310
M20 300 425 610
M24 530 730 1,050
M27 820 1,150 1,650
M30 1,050 1,450 2,100
(1) – resistance class according to DIN ISO 898 standard
INSPECTION
•
Once, after purchasing the trailer, before first use.
•
Every 12 months.
•
Every 3 months during intensive work.
5.10 ADJUSTMENT OF DRAWBAR POSITION
Location of the drawbar should be selected individually depending on the height of the hitch
on the tractor that will pull the trailer. If possible, we recommend adjusting the tractor hitch so
that the trailer drawbar is positioned horizontally while driving on a flat terrain.
The transition from lower to the upper hitch and vice versa is achieved by reversing the
drawbar (1) by 180 degrees and mounting it to the faceplate (2).