Product Manual
13
A Product of Progress Mfg. Inc.
Identify the coupler style
that most closely matches
your trailer. See Figure 7.
Top-mount: Place your
link plates so that the single
hole is above the frame, and
the L-bracket studs are
toward the top of the frame.
See Figure 8a.
Bottom-mount: Install
your link plates ‘upside-
down’ by placing your link
plates so that the single hole
is below the frame, and the
L-bracket studs are toward
the bottom of the frame. See
Figure 8b.
read a 1/2” x 4” bolt
through the single hole of the
outside and inside link plates
from the outside in. e
head of the bolt should be
against the outside link plate with the threads to the inside. Slide a lock washer
on, then thread a nut onto end of bolt a few turns. Slide the link plates over
the frame as shown so that the L-bracket studs are facing outward. read the
second bolt through the link plate holes closest to the trailer frame with the head
on the outside, and thread the lock washer and nut onto it from the back side.
Pinch the inside and outside link plates tight to the trailer frame so that both
lay at against the frame. Inside link plates are sometimes slightly bowed. If this
is the case, the center of the bow should be placed toward the trailer frame so
that as they are tightened they atten out
against the frame.
Continue holding them in place
while you hand tighten both nuts. Use
wrenches to nish tightening the link
plate bolts until they are snug, alternating
from top to bottom 1/2 turn at a time.
ese should be torqued to 65ft-lbs.
Improper installation or under tightening
may cause link plates to “walk” along the
frame. See Figure 9.
Figure 8bFigure 8a
Figure 9
Correct Incorrect
Top-mount Bottom-mount
Figure 7