Bumper Bolt Installation
•
The Bumper Bolt Assembly consists of a
1”-8 x 5” hex bolt, a Ø2-1/2” x 3-1/2”
rubber bumper, and a 1” hex jam nut.
•
Screw the 1” bolt into the Shock Mounting
Arm until the jam nut touches the square
nut as shown.
•
The rubber bumper does not need to be
tightened between the bolt head and the
jam nut. It should be able to twist easily.
•
Tighten the jam nut to at least 100 ft-lbs
torque. This is a high stress component
and should be checked periodically.
•
Install Bumper Bolt on second Shock
Mounting Arm.
Installing Truss Tubes
•
Using 5/32” Allen wrench provided, make
sure that the set screws on each Truss
Tube bearing are backed out.
•
Install Brass Spacer on north end of
axle (if not already installed).
This
spacer prevents the Truss Tube from
eventually making contact with the end
plate of the Axle, which will inhibit
tracking.
•
Slide Truss Tube on to the north end of
the Axle until the bearing is snug against
the bushing and axle end cap. Tighten set
screws.
•
The Truss Tubes should be spaced so that the center-to-center distance is 42-3/4”.
(The inside-inside distance will be 40-3/4”).
UTRF-072
42 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.
