Diamondback 270 User manual

1. If you have a 2016–up Tacoma, you should affix the included rubber gasket to your bulkhead prior to
installing your cover. Refer to the Bulkhead Prep Kit Installation Guide for details.
2. If you are installing a Cross Bin, you should start that before you install the DiamondBack 270 (but,
if you have a 2016–up Tacoma, after you affix the rubber gasket to the bulkhead ). Refer to page 2 of
the Cross Bin Installation Guide for details.
3. It’s possible for one person to install a DiamondBack solo, but the whole process, especially positioning
the panels and adjusting the lock rods, is much easier with two people.
PREPARE THE CARGO BED & PLACE THE COVER
INSTALLATION GUIDE CVR-270.5
DiamondBackCovers.com / 800 935 4002
Important installation information
IMPORTANT!
Keep an eye out for these icons:
Normal install time
75 minutes
Tips to assist installation
Helpful Hints
CONTINUED ON REVERSE >
G-913 Cap Clamps
(2) for ’16–up
PARTS INCLUDED:
Lock-Rod Striker Brackets (2)
G-200 Cap Clamps
(4) for ’16–up or (6) for ’05–15
1/8"
Hex Key
Gas
Springs (6)
Tail Panel
Cab & T Panels Assembly
9/16"
Socket
7/ 1 6"
Socket
Ratchet Wrench
270
’05–up Toyota Tacoma
with the 60" cargo bed
TOOLS REQUIRED:
TOOLS REQUIRED: TOOLS REQUIRED:
PRE-INSTALLATION NOTES:
T30 Torx/Star
Wrench
If you have a 2016–up Tacoma, you should affix the included
rubber gasket to your bulkhead prior to installing your cover.
Refer to the Bulkhead Prep Kit Installation Guide for details.
Remove the plastic cap from the tailgate end of the driver-side deck
rail by pressing its tab.
1
Use a T30 Torx wrench to remove the factory bolt near the
tailgate end of the deck rail.
2
Slide the driver-side lock-rod striker
bracket into the deck rail until its forward
hole aligns with the factory bolt hole.
3
4Reinsert the factory bolt and
retighten it with the Torx
wrench.
Repeat steps 1–4 on the passenger side.
5
Place the cab & T panels assembly on
the front half of the bed so its
leading edge lines up with the
leading edge of the bulkhead.
6
9Center the DiamondBack side to side.
Lower the tail panel into the closed position.
8
7Attach the tail panel by angling it 90° from the bed rails, sliding its
driver-side, loop-shaped hinge knuckle fully onto the correspond-
ing center-panel hinge pin, then dropping its passenger-side,
C-shaped hinge knuckle fully onto its corresponding pin.
FIRST SECOND

With the lock handle in the
closed position, position the
lock rods tight against the
underside of the striker
brackets so that they’ll draw
the panels down
and compress
the weatherstrip.
Tighten the rod
guide brackets
with a 7/16" socket.
15
7/16" socket
Double-check all three panels to ensure they open, close, lock &
seal correctly. If at any point the weatherstrip does not touch the
bed rails, adjust the position of the lock rods.
17
ATTACH THE COVER & ADJUST THE LOCK RODS
MAY 2017
DiamondBackCovers.com
If you have a 2005–2015 Tacoma, you should affix the included
bulkhead weatherstrip at this point. Refer to the Bulkhead Prep
Kit Installation Guide for details.
10
11 Place two G-200 cap clamps inside both side ends of the T panel,
their bottom halves fitting into the deck rail system. Tighten with a
9/16" socket.
Be careful that tightening the clamps does not deform
your bed rail caps.
Place the remaining two clamps under the cover at the nose of
the T panel, their bottom halves gripping the square-tube top rail
(’16-up) or fitting into the deck rail system (’05-15). Tighten.
12
Retighten your clamps after 100 miles. Check them
every time you haul on top.
Adjust the length of the lock rods and retighten the set screws so that:
A. with the lock handle in the open position, the rod tips clear the
striker brackets and
B. with the handle in the closed position, the rod tips do not strike
the bed walls.
14
Repeat steps 13 through 15 for the cab-panel lock rods so that:
A. with the lock handles in the open position, the rod tips clear
the deck rail system or square-tube top rail (forward) and
T-panel gutter (rearward),
B. with the handles in the closed position, the forward rod tips
do not strike the bulkhead,
C. the rods point downward, and
D. closing them draws the panels down & compresses the
weatherstrip.
16
Your panels should be difficult to operate at first. After finishing
installation 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.
If you are also installing a Side Bin, do so now. Refer
to the Side Bin Installation Guide for details.
18
Attach the 30-lb gas springs to the cab-panel ball studs and the two
stronger gas springs to the tailgate-panel ball studs.
19
You’ll find the strength of the gas springs
printed on the sides of the barrels.
To avoid premature failure of your gas springs, attach them
barrel up, shaft down.
20 Leave the cover closed and
locked for 24 hours to allow
the weatherstrip adhesive,
which is pressure-sensi-
tive, to fully cure.
ATTACH THE GAS SPRINGS
MARCH 2018
13 Close the tail panel. Loosen the set screws
on the tailgate-panel lock-rod linkages
with the 1/8" hex key.
1/8"hex key