INTRODUCTION
PRELIMINAR STUDIES AND CONSIDERATIONS
MAINTENANCE AND DAMAGE PREVENTION
WORK ON BASIC VEHICLE
MOUNTING AND CONSTRUCTION
POWER TAKE-OFF
ELECTRIC AND ELECTRONIC SYSTEMS
APPENDIX
V1.0, February 2015
Body Builder Manual Part II, Specific Book LCV
273
For mechanical coupling devices unsuitable for transmitting vertical bearing
loads
So as not to exceed the maximum axle load, the correct location of the fifth wheel
F must be calculated:
Fig. 8-196 SPBGA22_006 Calculating the position of the 5th wheel
Table 1-197 SPBTA22_005 Terms used in this calculation
Using the equations of static equilibrium:
See chapter A.2.1 "General concepts and formulas".
Σ
MO = 0; U * F = L
R
* WB
2)
The value U can be obtained using the formula (11).
11)
D = g *
0.6 * T * R
(kN)
T + R - U
DISTANCES
LOADS
WB
Wheelbase (a + b)
U
Max. 5th wheel vertical load
F
Distance from the front axle to
the centre of the fifth wheel
L
F
Reaction load in front axle
L
R
Reaction load in rear axle
O - Reference point
F =
L
R
* WB
U
NOTICE
To obtain more information about coupling devices
see chapter 4.7 "Coupling device adaptations".