WALTERSCHEID IN338-28N Instrucciones De Instalación Y Operación página 12

6. CALCULATION OF CHARACTERISTIC VALUES FOR CORRECT
OPERATION 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 = 16 t; R = 20 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).
NON-AUTOMATIC TRAILER COUPLING WITH
NON-ROTATABLE CLEVIS TYPE
IN338-28N, IN338-43N, IN338-50N
T: admissible total mass of the vehicle in tons
R: admissible towed mass in tons
g: acceleration due to gravity = 9.81 m/s
16
D = 9,81
x
16
2
0
2
•
= 87,2 kN
20
+
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