Installation; Choice Of Fifth Wheel; Mounting Bolts - Fontaine 150SP Montage- Und Betriebsanleitung

5.1 Choice of fifth wheel

Standard Fifth wheels (as defined in 94/20/EC) have a rating of 20
Tonnes Imposed Load and a 'D' value of 150 kN. These ratings
can be found on the "Type label" of the Fifth wheel Equipment.
Whilst the Imposed Load is easy to determine the vertical load at
the kingpin) the 'D' value is more complicated and is determined
using the formula shown in Figure 1.
The Fifth wheel Coupling chosen should be rated with loads equal
to or higher than the calculated values, and under NO
CIRCUMSTANCES should a coupling be fitted where the
calculated rating is higher than the values indicated on the
equipment.

5.2 Mounting bolts

Coupling Equipment is normally supplied with the correct
mounting bolts for installation purposes (unless specifically
requested otherwise).
The bolts supplied will be rated at the correct grade for the
installation. However a good general guide for normal use is to
use 12 bolts size M16 grade 10.9.
These bolts should be tightened to the torque values displayed in
Table 2.
150SP Fifth Wheel Instruction Manual
I N S T A L L A T I O N
Table 2 - Most common Bolt sizes and grades as supplied with
Fontaine Fifth wheel Equipment and their relevant torque values
which should be used for tightening these bolts.
All of the torque values shown are in Nm. To convert these values
to lbs ft divide the figure shown by 1.356
12
Metric Bolts Bolt Grade
8.8
14mm /
16mm 252
18mm 347
20mm 367
Figure 13 - Typical fifth wheel installation
10.9
227
280
484
Table 2