15. The trailer that is attached to the fifth wheel should
impose a consistent vertical load. Repeated nega-
tive loading (trying to pull the fifth wheel off of the
brackets with the kingpin) is not allowed. A
minimum
vertical static load applied to the fifth wheel through
the trailer is 10% of the gross trailer weight.
16.
Do not
center load the fifth wheel. The vertical load
should be distributed over the entire surface of the
fifth wheel.
17. Fixed angle mounts (inboard angles) shall be flush
with the top of the truck frame. (No gap between the
truck frame and the angle). See Figure A on page 5.
18.
Do not
attempt to “block” 3000 series fifth wheels.
A production “blocked” fifth wheel specifically
designed for this application is available.
Fontaine
®
Fifth Wheel Handbook
6
