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Idiomas disponibles
Idiomas disponibles
➢
Do not install mounting rails over plastic bed liners. Plastic bed liners must be cut out of the way to provide metal to metal
contact. Mounting rails may be installed on spray in liners.
➢
Use only bolts, nuts, and washers supplied to install this kit. All bolts and nuts are Grade 5 unless otherwise specified.
➢
These instructions are guidelines only, actual installation is the responsibility of the installer and the owner. Always measure
truck and trailer before installing hitch to be sure that there is clearance at the cab and at the bumper to allow for turns.
➢
Do not install this product on or attempt to tow with a truck with a 5-1/2' bed unless a sidewinder pin box coupler has been
installed on the trailer.
IMPORTANT: Contact between any bare steel components (frame mounting brackets, U-shaped spacers, mounting rails, etc.) and bare
aluminum bed may cause corrosion over it's life. Insure that the paint is not damaged on the brackets. This kit also includes galvanic
isolators that provide an extra layer of protection- use galvanic isolator squares (13) or galvanic isolator strips (11),(12), & (14) on the
surface that will make contact with the truck bed. See Figure 4, Figure 5, & Figure 6. Repaint any areas where holes were drilled through
bed.
Installation Instructions
1.
Lower and remove spare tire if extra room is needed. If equipped with inner plastic wheel well liner, remove inner plastic wheel well liners to allow access to
frame.
2.
Place the galvanic isolator strips (14) on the bottom surface of each rail to protect aluminum truck bed as shown.(See Figure 3)
Note: It is important that the galvanic isolator strips (14) are installed correctly to avoid corrosion between the mounting rails and truck bed over its life.
3.
Place the rear mounting rail in the box of the truck, using your tape measure, center the rail between the weld seams on the length of the truck box floor or the
wheel well and the proper distance from the rear edge of the truck. (See Figure 2)
Mark and center-punch the holes, as per the illustrations. Move the rail out of the way and drill each position with a 1/8" drill bit. (See Figure 2)
4.
Warning: When drilling holes, be aware of potential risks to vehicle components above and below the truck bed and make appropriate safe guards to
protect them from damage.
5.
Install the galvanic isolator strips (11) & (12) on the frame brackets (18) & (19). (See Figure 6)
6.
Loosely install the frame brackets (18) & (19) using the appropriate hardware and hand tighten. (See Figure 3)
1.) Place a 5/8" flat washer (8) over each of the 5/8-11 x 4-1/4" hex head bolts (6).
2.) Position the frame brackets (18) & (19) over the frame mounting holes, and route the 5/8-11 x 4-1/4" hex bolt (6) through the frame bracket and vehicle frame
from the outside of the frame to the inside of the frame as shown. (See Figure 3)
3.) Install the 5/8 conical washer (9) and then the 5/8-11 nut (7) over the 5/8-11 x 4-1/4" hex head bolt (6) and hand tighten.
Check that the 1/8" drilled holes from step 4 align with the slots of the frame bracket (18) & (19). If holes do not alight, adjust the frame brackets as needed. If
7.
this does not align the holes, restart the installation at step 4. When the holes align with the rails and brackets, remove the rails and brackets and proceed to step 8.
Enlarge the 1/8" drilled holes to 9/16",
8.
Warning: When drilling holes be aware of potential risks to vehicle components above and below the truck bed and make appropriate safe guards to
protect them from damage, paint all bare metal.
Drill a 1/8" hole in the center bolt location of row 3 through the truck bed and the truck bed cross member/sill/hat section. Enlarge the 1/8" hole to 1-1/8" IN
9.
THE TRUCK BED ONLY. Enlarge the 1/8" hole in the truck bed cross member/sill/hat section to 9/16".
Warning: When drilling holes be aware of potential risks to vehicle components above and below the truck bed and make appropriate safe guards to
protect them from damage, paint all bare metal.
10.
Place the tube spacer (20) in the center rail bolt location in Row 3. (See Figure 3)
11.
Reposition the mounting rail over the holes.
12.
Install the rear rail attachment bolts as shown in figure (3). Ensure that the galvanic isolator patches (13) are installed on the U-shaped spacers and spacer blocks
as shown. (See figures 4 & 5) Attach the 1/2" conical washers (16) and hex nuts (15) on the bottom side of the frame bracket (18) & (19) , as per figure 3, and
tighten snug to keep the mounting rail from moving. The outer bolts in row 3 of figure 2 will utilize 1/2-13 x 2 hex head bolts (1) on the top of the rail, with a
galvanic isolator patch (13), 1/2 x 1-1/2 x 2-1/4 spacer block (3), and a nut handle (2).
member/sill/hat section, route the 1/2-13 x 4-1/2 Carriage bolt (21) through the rail and tube spacer (20), and secure using the 1/4 x 1-1/2 x 3 spacer (5), 1/2 conical
washer (16), and 1/2-13 nut (15). For the center rail bolt in row 4 of rail attachment bolts, route a 1/2-13 x 2 Carriage Bolt (17) though the rail and bed, with a ½ x
1-1/2 x 2-1/4 spacer (3) between the rail and bed. Then secure using a 1/4 x 1-1/2 x 3 spacer (5), ½" conical washer (16) and 1/2-13 nut (15).
13.
Place the unassembled 5th wheel legs/slider/goose into the already installed mounting rail. Position the second mounting rail with the legs/slider/goose by
inserting the tabs into the mounting rail and pushing the mounting rail tight towards the other mounting rail. Ensure that the mounting rail is centered between the
weld seams on the length of the truck box floor. This will position the mounting rail in the correct location and ensure that the 5th wheel will have a snug fit to the
truck.
Note: If more than one hitch product will be used with the rails, then both should be used at the same time to align the second rail. This will ensure t
hat one product does not compromise the fit of the other.
14.
Mark and center punch the holes in the front mounting rail, as per figure 3. Move the front mounting rail and the frame mounting brackets out of the way, and
drill with a 1/8" drill bit.
Warning: When drilling holes be aware of potential risks to vehicle components and make appropriate safe guards to protect them
15.
Repeat steps 6,7, and 8 for the front mounting rail.
16.
Install the front rail attachment bolts and spacers as shown in figure (3). Ensure that the galvanic isolator patches are installed on the U-shaped
spacers and spacer blocks as shown. (See figures 5 & 6) Attach the 1/2" conical washers (16) and hex nuts (15) on the bottom side of the frame
bracket (18 & 19), as per the illustrations and tighten snug to keep the mounting rail from moving.
17.
Torque all hardware.
Note: Torque all Grade 5, 1/2" hardware to 75 ft-lbs. Torque all Grade 5, 5/8" hardware to 150 ft-lbs. First, torque the bed mounting rails to the frame
brackets and then torque the frame brackets to the truck frame.
18.
Replace inner plastic wheel well liner and spare tire, if removed.
©
2018 Horizon Global Americas Inc.
EXCEPT ROW 3 CENTER BOLT.
Printed in Mexico
For the center bolt in row 3, which goes through the truck bed cross
Sheet 2 of 6
50074N
from damage.
2/20/2018
Rev. D
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