Reese Dual Cam II User manual

Installation Instructions
Dual Cam II Part Number(s):
66091, 66092, 66093
©2022 Horizon Global America Inc. Page 1 of 16 66091N 02/03/2022 Rev. E
Under no circumstances should the towing vehicle manufacturer’s recommended vehicle towing capacity be
exceeded. Failure to follow instructions for installation and use may cause property damage, injury or death.
READ ALL INSTRUCTIONS BEFORE STARTING THE INSTALLATION OR USE
Please Visit https://qr.towingproducts.net for the most updated version of the Installation Instructions
Or call Technical Service at: 1-800-632-3290
Shank not included. Please Use
Appropriately Rated Shank.
Scan QR code For Questions
THANK YOU
For purchasing the Reese Dual Cam II, Reese’s premium Weight Distribution Kit. Please read the
Instruction manual carefully & follow all Safety Guidelines.
WEIGHT DISTRIBUTION
Kit Number
Spring Bar
Weight Rating
Max Tongue
Weight Max Gross
Weight (GVWR)
66091 600 600 12,000
66092 800 800 12,000
66093 1,200 1,200 12,000
WEIGHT CARRY (WITHOUT SPRING BARS)
Max Tongue Weight 1,000
Max Gross Weight (GVWR) 10,000
Tools and Equipment Required to Install:
•1-1/8” socket
•1-1/8” wrench
•15/16” socket
•15/16” wrench
•¾” Socket
•¾” Wrench
•Torque wrench capable of going up to 450 ft-lbs
•Tape measure

Installation Instructions
Dual Cam II Part Number(s):
66091, 66092, 66093
Experience the ultimate in sway control and weight distribution. The Dual Cam II, High Performance System
continually works to ensure the highest level of towing safety. The stronger the sway force, the more the
Dual Cam II System works to stop it. It’s the difference between active sway and passive sway control
where our unique design literally forces the trailer to stay in a straight line behind the tow vehicle. The newly
redesigned Dual Cam II system is now easier than ever to install and offers even broader application
coverage to work with the most popular trailer frames.
➢Fully automatic, active sway control system forces trailer to stay straight behind tow vehicle
➢No Drill installation
➢No need to relocate items on top of A-Frame to install Dual Cam II High-Performance Sway Control
➢Simple installation and adjustment
➢Hooking up spring bars automatically hooks up sway control
➢No U-bolts to interfere with bottle racks or another A-Frame mounted items
➢Limited lifetime warranty
➢Reduced noise when traveling
➢Rated for weight carry of 10,000 lbs
➢Includes pre-torqued 2-5/16” hitch ball
➢Works with both 1-1/2” and 2” frame widths
➢Works with frame heights of 4”-7”
Frequently asked questions:
➢What is a Weight Distribution Kit / Hitch?
Ans: Weight distribution kit or hitch is a system where it acts as a leverage between the tow vehicle & the
trailer causing the Tongue weight to be carried by all axles of the tow vehicle & trailer.
➢What is Gross trailer weight , Tongue weight & FALR?
Ans: Gross trailer Weight: Weight of a fully loaded trailer, inclusive of cargo.
Tongue Weight: The downward force that is exerted on the hitch ball by the trailer coupler.
FALR: Front Axle Load Restoration
➢Is a Sway Bar needed with this kit?
Ans: The kit is built in with a Sway prevention. Sway bars are not required.
➢Can the Kit be used on an Aluminum trailer?
Ans: Yes, the kit can be installed on an aluminum trailer. However, an Isolator shall be used to avoid
Galvanic corrosion. Polypropylene tape or a heavy-duty Packaging tape maybe used as an Isolator.
➢Can a lower rating Spring bars be used to tow higher load?
Ans: No, Higher loads cannot be towed with a lower rated Spring Bars.
©2022 Horizon Global America Inc. Page 2 of 16 66091N 02/03/2022 Rev. E

Installation Instructions
Dual Cam II Part Number(s):
66091, 66092, 66093
BALL MOUNT ASSEMBLY
CAM & BRACKETASSEMBLY
©2022 Horizon Global America Inc. Page 3 of 16 66091N 02/03/2022 Rev. E

Installation Instructions
Dual Cam II Part Number(s):
66091, 66092, 66093
BALLMOUNT . QTY -1
1 2 3 4
567
8
ADJUSTABLE WASHERS.
QTY -2
HEX BOLT: ¾” 10x 5-1/2” .
QTY -1
HEX BOLT: ¾” 10x 4-1/2” .
QTY -1
HEX NUT: ¾” -10. QTY -2
LOCK WASHER: ¾”.
QTY -2
SPRING BARS: 600lbs FOR WD KIT No: 66091. QTY-2
SPRING BARS: 800lbs FOR WD KIT No: 66092.. QTY-2
SPRING BARS: 1,200lbs FOR WD KIT No: 66093. QTY-2
BALLMOUNT SPACER .
QTY -1 UPPER CAM WELDMENT.
QTY -2 INNER BRACKET.
QTY -2
910 11
HEX BOLT: 5/8” 11x 4” .
QTY -2
12
HEX LOCK NUT: 5/8”-11.
QTY -2
13
LOWER CAM WELDMENT.
QTY -2
14
HEX BOLT: 5/8” 11x 3-1/2” . QTY -2 ( FOR 2” FRAMES)
HEX BOLT: 5/8” 11x 3” . QTY -2 ( FOR 1-1/2” FRAMES)
©2022 Horizon Global America Inc. Page 4 of 16 66091N 02/03/2022 Rev. E

Installation Instructions
Dual Cam II Part Number(s):
66091, 66092, 66093
CONICAL WASHERS: 5/8 .
QTY -2
15 16 17
18 19
21
BOLT ON CAM. QTY -2
HEX NUT: ½ ” -13. QTY -4
22 23
LYNCH PIN . QTY -2
CARRIAGE BOLT: ½” – 13X 8-1/2” . QTY -4 CONICAL WASHERS: ½” .
QTY -4
HEX BOLT: 5/8” 11x 1-1/4” .
QTY -4
LOCK WASHER: 5/8”.
QTY -4
BAR RETAINER. QTY -2
20
REQUIRED TOOLS
•1-1/8” SOCKET
•1-1/8” WRENCH
• 15/16” SOCKET
• 15/16” WRENCH
• 3/4” SOCKET
• 3/4” WRENCH
•TORQUE WRENCH: UP-TO 450 ft-lbs
•TAPE MEASURE
24
SPRING BAR LEVER QTY -1
©2022 Horizon Global America Inc. Page 5 of 16 66091N 02/03/2022 Rev. E

Failure to read warnings and follow instructions may result in serious personal injury or death, vehicle crash, and/or property
damage.
•Do not modify.
•Do not tow one trailer behind another (Tandem Towing).
Avoid putting any part of your body under the trailer or between the truck and trailer. Unexpected or accidental movement of
the truck or the trailer can cause serious injury or death
If you must place any part of your body under the trailer or between the truck and trailer you MUST perform ALL the following
steps:
•Check that the truck transmission is in park
•Check that the emergency brake is set
•Block in front of and behind all trailer tires
•Check that the trailer landing gear are resting on firm ground
Hitch balls may have reduced load rating. Ball rating must equal or exceed trailer GVWR.
Installation Instructions
Dual-Cam II Part Number(s):
66091, 66092, 66093
Assembly and Installation
INITIAL SET-UP: BALL MOUNT
1. .
2.
3.
➢Line up tow vehicle and trailer on level pavement, in a
straight line, uncoupled.
➢Make sure trailer is level both sides (Front to Back)
➢To achieve proper Weight Distribution, Measure the height
of the front truck fender to the ground and record that
height.
Note:
If the truck is equipped with Air Bags, It may be necessary to
turn off the system & wait for 20 minutes to make sure the air
bags are deflated. Please refer to your vehicle’s owner’s manual
for proper towing before Installation. Weight Distribution
between the truck & trailer may be improper if the air bags
deflate instructions are not followed.
➢Install the appropriate Hitch Bar (Not provided with the Kit) in
the truck receiver, and secure with the hitch bar pull pin &
retainer clip (Not provided with the kit). Depending on the
towing setup the Hitch Bar can be used in Rise or Drop
position.
Note: Dual Cam II WD Kit does not include Hitch Bar. Reese
part number: 3357 ( 2-Inch Hitch Bar) is shown in the picture
as reference.
©2022 Horizon Global America Inc. Page 6 of 16 66091N 02/03/2022 Rev. E

Pre-Assembled Ball
(Torqued to 450 ft-lbs)
Ball must be torqued to 450 ft-lbs.
Please check before each use.
!
➢Insert the 5-1/2” long bolt (2) through the
adjustment washer (3), the ball mount (1), the
hitch bar, the second adjustment washer (3),
lock washer (4), and nut (5). Also insert the
bottom 4-1/2” bolt (6) through the ball mount
(1), the shank, lock washer (4), and nut (5).The
adjustment washers and ball mount slot allow
for up to 15⁰ of adjustment . Hand tighten
Upper & lower nuts onto bolt.
➢Coupler’s Height adjustment:-
Level the trailer. Measure & record the
distance from the ground to the top of the
coupler ball socket.
THE HEIGHT OF THE HITCH BALL NEEDS TO BE ~1 INCH ABOVE THE
COUPLER. THIS IS TO COMPENSATE FOR VEHICLE SQUAT WHEN
THE TRUCK & TRAILER ARE CONNECTED
➢Slide the Ball mount (1) from the top or bottom of
the Hitch Bar, aligning the holes until the top of
the Ball is ~1 from the top of coupler
•Note: If needed fill any gap between the Ball
mount (1) & the Hitch Bar with a Ball mount spacer
provided (8).
•This kit comes with a 2-5/16” ball pre-assembled
on the Ball mount. Confirm that the trailer coupler
is 2-5/16” or replace the hitch ball on the ball
mount. This ball mount requires a ball with a 1-1/4”
shank thread size.
Installation Instructions
Dual-Cam II Part Number(s):
66091, 66092, 66093
4.
5.
©2022 Horizon Global America Inc. Page 7 of 16 66091N 02/03/2022 Rev. E

6.
7.
8.
➢Install Spring Bars (7) into Ball mount (1) by rotating
the bars horizontally, slipping the lower trunnion
posts into the pockets, then rotating the bars into
position parallel to trailer frame rails
Note: Height of the Coupler may vary based on
the type of the couplers.
➢Ensure the adjustment washers are in the same tooth
position on either side of the ball mount by counting the
number of exposed teeth on either side. Washer teeth
must be parallel to ball mount teeth for proper
engagement. Secure the ball mount pitch by tightening
the top bolt to 300 ft-lbs of torque. Then tighten the
bottom bolt to 300 ft-lbs of torque
Note: At max tilt adjustment of the ball mount (1) not all
teeth on the adjustment washers may mate to all teeth on
the ball mount .This may be a common scenario.
Installation Instructions
Dual-Cam II Part Number(s):
66091, 66092, 66093
➢Manually lift the bars until the Ball mount aligns
straight up to the upright position.
➢Note the tooth position of the adjustment washers
on the Ball mount when the Spring bars are lifted to
the max height. This should be the positioned where
the adjustment washers need to be tightened to
achieve the proper Ball mount angle.
➢Make sure that the hitch ball is ~1” above the
trailer's coupler
!
©2022 Horizon Global America Inc. Page 8 of 16 66091N 02/03/2022 Rev. E

9.
10.
11.
➢For proper bracket positioning, couple the trailer to the
truck. Make sure to secure the coupler on to the ball
mount with the lock.
➢Reinstall the Spring Bars
➢Using Brackets fastener kit . For one side of the trailer,
loosely assemble, Upper Cam Weldment (9), inner
frame bracket (10) upper bracket hex bolt (11)(4” long
for 2” wide frames 3-1/2” long for 1-1/2” wide frames,),
and lock nut (12).
➢Slip brackets over the trailer frame so that the center
of the brackets is in line with center of the convex
portion of the Cam (19) in the Spring Bars as shown
in the picture.
➢Repeat the step on the other side of the trailer frame.
Installation Instructions
Dual-Cam II Part Number(s):
66091, 66092, 66093
©2022 Horizon Global America Inc. Page 9 of 16 66091N 02/03/2022 Rev. E

12.
13.
➢Slide the lower frame bracket (13) around the inner
frame bracket (10), between the outside of the
trailer frame and the outer frame bracket as shown
in picture. Secure the lower bracket with the
appropriate lower bracket bolt (14)(3” long for 1-1/2”
wide frames, 3-1/2” long for 2” wide frames) &
conical washer (15).
➢Partially tighten upper (11) and lower bracket
bolts(14) until both brackets become flush with
inside and outside surfaces of the trailer frame.
Allow for some sliding to position the brackets and
cam correctly for the spring bars to rest on the Cam.
➢Repeat the step on the other side of the trailer
frame.
Installation Instructions
Dual-Cam II Part Number(s):
66091, 66092, 66093
➢Select carriage bolts (16) , ½” nuts (18) and ½”
washers (17). Slide in the carriage bolts through
the upper cam weldment (9) as shown. Bolts shall
pass through the square holes of the lower cam
(13). Install the fasteners as closely to the frame
as possible. Tighten bolts and nuts until the lower
frame bracket is held securely against the bottom
of the frame.
➢Do not fully torque the carriage bolts. Allow for
some sliding of the assembly brackets to position
the brackets correctly so that the spring bars shall
align on to the Cam.
➢Repeat the step on the other side of the trailer
frame.
©2022 Horizon Global America Inc. Page 10 of 16 66091N 02/03/2022 Rev. E