13
A Product of Progress Mfg. Inc.
Pinch the link plates tight to the trailer frame so both lay flat against the frame, and
hand-tighten the nuts on the inside. See Figure 12.
Tightening only one nut without first
pinching the link plates to the frame may
cause the inside link plate to bend when
torqued completely. It may also give you
a torque wrench reading that indicates
the link plates are tight, even though they
are not. See Figure 13.
Use wrenches to finish tightening the
link plate bolts until they are snug,
alternating from top to bottom bolt,
1/2 turn at a time. The link plate bolts
should be torqued to 65 ft-lb.
Figure 12
Correct
Figure 13
Incorrect
Figure 11
Bot
tom-m
ount
coupler or
V
-n
ose tr
ailer
Top
-m
ount
coupler
Incorrect - Gap Between
Frame and Bolt
Correct - No Gaps
There should not be a gap between the trailer frame and the link plate bolts above
or below the frame. See Figure 11. Move electrical or propane lines if necessary.
