Mount Assembly Instructions

bushing and axle end cap. Tighten set screws.
• Refer to the drawing provided with the instruction packet or to the table below. The
required dimension is the center-to-center distance between the two Truss Tubes.
UTRF-064 42 3/4”
UTRF-090 62 3/4”
UTRF-120, UTRF-168 74 3/4”
• Slide second Truss Tube on to the south end of the Axle. Using a tape measure, space
the southern Truss Tube so that the center-to-center distance (as measured from the
square tube sections) is correct. Tighten set screws. Adjustments may need to be
made when installing subsequent components.
• Note: The correct orientation of the Truss Tubes is with the square tube hanging below
the Axle and the bearings facing away from each other.
• Note: At this point the Truss Tubes may be quite a bit out of alignment. This is because
the bearings are designed to “swivel” in their housing. This feature allows the bearings
to tolerate misalignment and also prevents flex in the rack from damaging the bearings.
Pre-Installing Sliders
• Depending on the specific configuration of your rack, it will come with different sizes
and quantities of Sliders. The two types of Sliders are shown below.
• Some rack configurations may
include a set of Extruded Rail-type
Sliders that are designed to mount
on the reinforced midsection of the
Truss Tube. The square tube
section of these sliders is
noticeably wider.
• If your rack comes with the wider
Extruded Rail Sliders, install those
first. The correct orientation is with
the tab on the top side of the Truss Tube. The included drawing may specify whether
the tab should be on the left or right side. If this is the case, install as directed. If not,
the orientation is not critical.
• Next, install any regular-size
Extruded Rail Sliders.
• Finally, install the four
Canister Sliders so that the
outside edges are flush with
the ends of the Truss Tube.
The correct orientation on
the UTRF-168, UTRF-120,
and UTRF-064 is with the
tabs on the top side and
the overhanging section