CHASSIS MODIFICATIONS 2-29 E UROCARGO Euro 4/5 Table 2.13 * Calculated approximate values according to ISO/TCC22/SCI5/WG4 Annex A with the formula Fv = 3 Ч C Ч 0.6 + S (see following page) 2 Possible with strengthened tie and suitable tow hook 3 Possible on models with strengthened tie and suitable tow hook. The value of the maximum vertical load (static+dynamic) transmitted from the trailer to the hook, can be calculated more precisely with the following ISO formula: Fv = a · x 2 /l 2 · C · 0,6 + S Fv = Maximum vertical load (static + dynamic), transmitted from the trailer to the tow hook (in kN).
a = Vertical acceleration in the drawbar/hook coupling zone; depending on the rear suspension of the drawing vehicle, use the following values: - a =1.8 m/sec 2 for vehicles with air suspension (or the equivalent); - a = 2.4 m/sec 2 for vehicles with other suspensions x = Total length of the trailer load area (in m) l = Length of the trailer wheelbase (distance between the centre of the eye of the drawbar and the centre of the axle or axle centreline of the trailer) expressed in m. C = Total mass of the trailer R less the load of static support S (all in tons). S = Load of static support (in kN).
0,6 = Factor of deceleration Installing a towing device Print 603.93.431 Base - January 2008 Dimensions of flange (mm) Max. vertical loads permitted on hook (kg) Maximum towable weight (kg) (hook class) Static S Total load * (static+dynamic) Fv for centre-axle trailers R 120x55 (G135 or G3) 400 1130 4500 650 16901 65001 140x80 (G140 or G4) 900 2340 9000 (G150 950 2470 9500 G5 10002 29602 120002 160x100 G6 10003 40403 180003 81 G5 10003 44003 200003 700G61) 10003 51203 240003