WALTERSCHEID KU 2000 Manual Del Usuario página 16

6. CALCULATION OF CHARACTERISTIC VALUES FOR CORRECT OPE-
RATION OF THE COUPLING ON AGRI-CULTURAL AND FORESTRY
VEHICLES
6.1 TRACTOR WITH MULTI-AXLE TRAILER (D VALUE)
The D value is defined as the theoretical representative force for the horizontal component of the force bet-
ween vehicle and trailer in longitudinal axis of the vehicle. The D value is calculated from the two admissible
total weights (tractor and multi-axle trailer) as follows:
T R
•
in kN
D = g
x
T R
+
The D value calculated for the tractor/trailer combination may be less than or equal to the D value of the
coupling.
Sample calculation:
T = 14 t; R = 26 t –>
6.2 TRACTOR WITH CENTRE-AXLE TRAILER (D VALUE, VERTICAL LOAD S)
The D value is calculated in accordance with 6.1.
In this case, attention must additionally be paid to the admissible static vertical load at the coupling point.
The static vertical load S is defined as the load transmitted by the centre-axle trailer at the coupling point in
static state.
The maximum admissible vertical load depends on the data of the connected devices (the lower value
applies in each case).
AUTOMATIC TRAILER COUPLING
TYPE KU / IN 2000
T: admissible total mass of the vehicle in tons
R: admissible towed mass in tons
g: acceleration due to gravity = 9.81 m/s2
14
•
D = 9,81
x
14
+
6
2
= 89,3 kN
26
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