Installation Guide

©2015 KNAACK LLC
3
Note:
Note:
• If your truck bed is constructed of aluminum, use zinc rich
primer to coat drilled holes.
• If your pickup is tted with a plastic drop-in bed liner,
it may need to be drilled, trimmed, or cut for proper
installation of truck box.
• Truck box cover may not properly latch until box is fully
bolted to truck bed.
• Periodically check tightness of mounting bolts to ensure proper
attachment.
• Use touch-up paint on any drill holes to prevent oxidation.
• Install boxes with vehicle parked on level ground.
• Fasten leg mounting feet directly
to bed oor, not liners or bed mats.
STEP 1
STEP 2
Locate Box in Truck Bed
Mount saddle/cross box rst
(if applicable). Place rubber
mounting pads on bed rails.
Place box into position on top
of mounting pads. Support box
with blocking until mounted.
Square box to bed and level
box so top is horizontal when
viewed from rear. Leave
1/8” gap between side box
and saddle/cross box (if
applicable). Make sure cover
opens fully without interference.
Position rear leg as shown above. Use square to ensure
vertical orientation. Mark both holes at top of leg and
both holes in truck bed oor.
Repeat leg placement and marking process for other
leg. If installing side boxes with a saddle or cross box,
the front leg can be replaced with an angle bracket.
Remove box from truck. Drill all marks on box and truck
with 3/16" drill bit. Redrill all holes with 1⁄2" drill bit.
Install all Blind Fasteners.
5/16-18 x 2-1/4"
Hex Head Bolt
5/16-18 x 2-1/4"
Hex Head Bolt
5/16-18 x 1-1/4"
Hex Head Bolt
5/16-18 x 1-1/4"
Hex Head Bolt
Leg
Mounting Pad
Mounting Clamp
5/16" Lock Washer
5/16" Lock Washer
5/16" Lock Washer
Fender Washer
5/16" Flat Washer
5/16" Flat Washer
5/16" Flat Washer
Blind Fastener
Blind Fastener
Angle Bracket
CROSS BOX
1/2" Holes
1/8"
SIDE BOX
5/16-18 x 1-1/4"
Hex Head Bolt
5/16" Lock Washer
Blind Fastener
INSTALLATION INSTRUCTIONS
Follow additional instructions if mounting to an aluminum truck
bed as explained in the Blind Fastener Installation on page 2.
ALUMINUM TRUCK BED INSTALLATION:
• To maintain full oor width between wheel
wells, legs should be aligned with the inside
edge of the wheel wells. The foot of the leg
must be squarely mounted on or between the
tops or oor ribs.
• Fasten leg mounting feet directly to bed oor,
not liners or bed mats.
Mark and Drill Mounting Holes