Reese 66151-66158 TRUNNION BAR W_SWAY CONTROL User Manual
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66151IN-051712 REV F
PCN17221
©2012 TOWING PRODUCTS, INC
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•Weight distribution kits are sold with and without draw bar (C). Some installations may require
a longer draw bar. Extended bumper guards, pickup truck caps, or rear mounted spare tires can
limit turn angles unless a longer draw bar is used. Individual draw bars are available in various
sizes for length and height.
•Insert the draw bar into the hitch box and install pull pin (D) and spring clip (E). Place
ballmount onto draw bar and move up or down so the top of the ball is approximately 1/2-1”
above the top of the trailer coupler. Draw bar may be used in either the up or down position
shown in Fig. 7.
PRELIMINARY BALLMOUNT ADJUSTMENT
•Install 3/4 x 4-1/2” bolt (F) in the lower hole of the ballmount as shown in Fig 1. Install the 3/4”
lock washer (G) and snug the 3/4” nut (H).
•Level the trailer. Measure and record the distance from the ground to the top of the friction pad (X
dimension Fig. 8).
•Install spring bar - Orient the spring bar/trunnion assembly with the trunnion reinforcement to the
top (rating label side up) shown in Fig. 8. Set the bottom pin of the trunnion into the lower socket
of the ballmount and slide the top trunnion pin into the top slot in the ballmount. Spring
bar/trunnion assemblies will fit on either side.
•Swing spring bar outward to the same angle as when connected to the trailer. Lift up on bar to
remove slack.
•As a starting point, the spring bar height “Y”, shown in Fig 8, should be approximately 2 to 3” less
than the friction pad height “X”.
• Tilt ball mount for proper “Y” dimension at the end of the spring bar. The ballmount is adjustable
through a 13° angle range for proper spring bar adjustment. Fig. 9
•Install 3/4 x 5-1/2” bolt (K) with two adjustment washers (J) as shown in Fig 1. Install lock
washer and nut. Align the washers as shown and hand tighten nut. Recheck the “Y” dimension and
torque both 3/4” nuts to 300 ft*lbs. If a large enough torque wrench is not available, torque nuts to
150 ft*lbs then tighten the nuts an additional 1/4 turn. Do not lubricate the threads.
HIGHEST POSITION
LOWEST POSITION
Fig. 7
Fig. 8