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Model 430 / 430A Hinge Assembly
INSTALLATION
The 430 and 430A Hinge Assemblies are ONLY
to be used and maintained with Premier parts.
Any substitution or use of non-Premier parts
in a 430/430A Hinge Assembly will VOID ALL
PRODUCT WARRANTY.
Installation Procedure:
1. 430 and 430A Hinge Assemblies must be
installed to comply with the Federal Motor
Carrier Safety Regulations. Specifically,
Section 393.70, Paragraph C: “Towing of Full
Trailers.” Prior to install or operation, consult
with local, State and Federal agencies, as there
may be additional applicable laws governing
the installation and use of this product.
2. Prior to welding, Premier strongly suggests
building a jig to properly locate each mating
433 Housing and 431 Bracket. The jig should
ensure the two hinge assemblies are of
equal height above the ground, parallel and
equidistant from the trailer centerline. The
outside edge of each housing is to be placed
5/16” from the adjacent inside surface of the
bracket as shown in Figure 1.
3. All welds used to install the 430 and 430A
Hinge Assemblies must follow one of the three
attached Welding Procedure Specifications;
GMAW, SMAW or FCAW. Welding should only
be performed by a certified welder skilled in
structural welding practices.
4. All weld locations must be clean, paint free
and void of any moisture, oil, grease, oxides or
loose or thick scale.
Because 430/430A Hinge Assemblies operate in
pairs, the installation instructions below are
to be simultaneously followed for each hinge
assembly.
433 Housing Installation:
5. The 433 Housings accommodate a front end
structure consisting of 2” x 4” channel or
rectangular tubing. The shorter welding tab on
the housing may be heated and bent outward
10° or inward 5° (see Figure 2), to conform to a
wide range of front end angles. Note that these
small weld tabs on both housings must be bent
equally and when the install is complete, the
two housings are to be equidistant from the
trailer centerline and their bores aligned.
6. Fit-up, between the rectangular tube (or
channel) front end and the mounting surface
of the 433 Housing, must be flush, as shown
in Figure 3. Failure to have a flush fit prior
to welding will cause the capacities to be
negatively affected. Figures 3A and 3B show
two possible examples of an improper fit-up
that must be avoided.
7. Attach the 433 Housing to the front end
tube with a minimum 3/8” fillet weld that
encompasses the entire interface between the
housing and tube as shown in Figure 3.
431 Bracket Installation:
8. The two 431 Brackets must be equal in height
above the ground, parallel, equidistant from the
trailer centerline and their bases must be flush
with the mounting structure surface. Misaligned
brackets or a failure to have a flush fit with the
mounting surface prior to welding will cause
poor hinge operation as well as negatively
affect their capacities.
9. Tack weld the 431 Brackets in place and test
fit the 433 Housings. Before proceeding, make
sure the bores of the housings align with the
bores of the brackets and the 5/16” gap exists
between each housing and bracket as shown in
Figure 1.
10. Attach the 431 Bracket to the mounting surface
with a minimum 3/8” fillet weld around the outer
and inner surfaces of the bracket as shown in
Figure 4.
430 / 430A Hinge Assembly after Welding
(430: Premier 434 Rubber Bushings only)
(430A: Premier 434B Poly Bushings only)
11. Allow the finished structures to cool.
12. Place the 439 Flange into the bore on the
vehicle centerline side of the 431 Bracket as
illustrated in Figure 5. Make certain that the slit
in the flange lines up with the slit in the bracket
(shown in Figure 4).
13. Slide the 434/434B Bushing into the 433
Housing making sure that the smaller diameter
end of the tapered bore in the bushing is
towards the 439 Flange. Place the housing into
