ADJUST THE LOCK RODS
ADJUST THE LOCK RODS
ADJUST THE LOCK RODS
ATTACH THE SAFETY CATCH & GAS SPRINGS
PREP FOR THE LOCK RODS
If you are also installing a Cross Bin, do so now. Refer
to the Cross Bin Installation Guide for details.
9If a DiamondBack HD, unpin each of the four lock-rod guide-bracket slide plates
by using a 7/16" socket to move one of its bolts to the second, unoccupied slot.
If plastic extends beyond the bottom of the vertical face of the metal
bed rails, trim a two-inch length of it flush with the bed rail’s bottom
edge at each of the four points where a lock rod will pass under the rails.
10
Adjust the lock rods and retighten their set screws so that
A. with the lock handle in the open position, the rod tips clear
the bed rails,
B. with the handle in the closed position, the rod tips do not
strike the bed walls, and
C. the first bend in the rods points downward.
13
Loosen the set screws on the
tailgate-panel lock-rod linkages.
1/8" hex key
12
Your panels should be hard to operate at first. After finishing
install below, leave the panels closed as much as possible for
3–4 days to break in the weatherstrip. After that period, you
should find that the panels open and close without difficulty.
Repeat steps 12 through 14 for the cab panel.
15
7/16" socket
7/16"
Using the access panels is easiest when
you press down as you open or close them.
For best weather protection, have a second person
press down on the cover while you adjust the lock rods.
Position the lock rods tight
against the underside of
the bed rails so that they’ll
draw the panels down and
compress the weather-
strip. Tighten the rod guide
brackets with a 7/16"
socket.
14
Attach the three remaining gas springs
(barrel up, shaft down).
18
If your truck has bed rail caps, affix the included
bulkhead weatherstrip. Refer to the Bulkhead
Prep Kit Installation Guide for details.
19
Adhesive cure time
24 hours
Leave the cover closed and locked for 24
hours to allow the weatherstrip adhesive,
which is pressure-sensitive, to fully cure.
20
Fit the safety catch, which is hanging
from the driver side of the cab panel,
around the bottom ball stud.
16
plastic
metal
Attach a gas spring to the ball studs
alongside the safety catch.
17
To avoid premature
failure of your gas
springs, attach them
barrel up, shaft down.
If some of your gas springs have
heavier poundage printed on their
sides than others, use the stron-
ger ones on the cab panel.
Peel the red adhesive backing from the edge trim pieces. Affix them
to the metal bed rail at the four points where a rod will pass under-
neath, the bottom curl of their j’s touching the bottom edge of the rail.
11
Affix the edge trim to the painted metal only, behind the plastic
bed liner or bed rail cap, if present.
Using a tool to widen the curl of the ‘j’ can
make this step easier.
Step 11 is unnecessary on ’07–13 Silverados
and Sierras.
You may need to pull the plastic bed rail cap away from the metal bed rail to
provide enough clearance to get the edge trim on.
DiamondBackCovers.com SEPTEMBER 2018
