Wabash National Dry and Refrigerated Van Trailers, Operator'S Manual

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6
SySTeMS aND feaTUReS
Kingpin and Upper Coupler
The upper coupler is a heavy fabricated steel
assembly attached to the lower front of the trailer,
which includes the kingpin. The kingpin provides
the connection for pulling by the tractor fifth wheel.
WaRNING:
Damage to the kingpin, upper coupler structure
and connecting fasteners will compromise the
structural integrity of the trailer.
• Ensure all replacement fasteners are of the same
diameter, design, and strength rating as the
original equipment manufacture.
WaRNING:
Never operate a trailer without first inspecting
and verifying a proper coupling.
A visual inspection is required by law. Some
improper couplings can pass a pull test. Sound
alone is not reliable. A visual inspection is
mandatory.
floor System
The trailer floor system includes decking, floor
supports/crossmembers, lower sidewalls, and
base-rail connection fastener.
Regular inspection of the floor system is important
to ensure safe use of the vehicle.
The load rating capacity of a floor system varies
depending on the model of your trailer.
Contact your sales representative or the nearest
Wabash National Trailer Center to verify the load
rating capacity of this trailer.
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