Draw-Tite 7902 User Manual
INSTALLATION INSTRUCTIONS
B
K
2.Level the trailer and measure and record the distance from the ground to the top of the ball socket (X dimension Fig.1)
6. I
(D) i
(G)
Trunnion Style
Weight Distributing Kits
PLYMOUTH, MI.
HIGH-PERFORMANCE BALLMOUNT
D*
INITIAL SET-UP
1. Line up tow vehicle and trailer on level pavement, in straight-ahead position, uncoupled.
3. Select a hitch ball with a diameter that matches the trailer coupler size. The three most common sizes are 1-7/8", 2",
and 2-5/16". Select ball with 1-1/4" or 1" threaded shank that is V-5 rated equal to or greater than trailer gross vehicle
weight rating (GVWR). A thin jam nut (.72” thick) should be used on standard ballmount to prevent interference with
spring bar trunnion.
J
G
E
L
**
D*
*D not included in all kits
**B not included in all kits
.
WARNING: Raised balls usually have reduced load ratings. Ball rating MUST equal or exceed trailer GVWR.
4. Attach hitch ball to the ballmount (G). Standard height hitch balls with 1-1/4" shanks are supplied with lockwashers and
nuts (If you must use a 1” shank ball, use bushing 58184 (B) to reduce hole size in ballmount (G) to 1”). Always use a
lockwasher and place washer next to nut. Unless otherwise specified by ball manufacturer torque ball nut to 450 ft/lbs for
1-1/4" nut, 250 ft/lbs for 1" nut.
5. Some installations may require a longer hitch bar (D). Extended bumper guards, pickup truck "caps", or rear mounted
spare tires can limit turn angles unless a longer bar is used. Individual hitch bars (D) are available in various sizes.
nsert the hitch bar
for proper height. Hitch bar may be used in either the up or down position (see below).
NOTE: Ball height should be greater
(approximately 3/4” to 1”).
nto the hitch box and install a pull pin. Place ballmount
than coupler height (measured in step 1) to compensate for vehicle "squat”
HIGHEST POSITION
onto hitch bar and move up or down
LOWEST POSITION
For Installation Assistance or Technical Help, Call 1-888-521-0510
66006IN-13JAN06H PCN7968 ©2006 TOWING PRODUCTS, INC Litho in USA
For vehicles with air springs, air shocks or automatic leveling system, check vehicle owners manual. Unless otherwise
)
()
* ADD 1” TO Y DIMENSION FOR NON
INTEGRATED CAM SPRING BARS
specified, level the vehicle with the vehicle loaded as it will be when towing before setting ball height and attaching
trailer.
PRELIMINARY BALLMOUNT ADJUSTMENT
1. Install hardware in lower hole of ballmount as shown. Tighten nut enough to prevent easy rotation of ballmount.
2. Determine spring bar height "Y" using table below. Insert spring bar and trunnion into the ball mount. Swing bar
outward to the same angle as when connected to trailer. Lift up on bar to remove slack. Tilt ball mount for proper "Y”
dimension at end of spring bar.
SPRING BAR HEIGHT (Y
COUPLER HEIGHT
X
COUPLER STYLE
A B C
Y
15" TO 18"
18" TO 20"
20" TO 22"
22" TO 24"
24" TO 26"
3. The ballmount (G) is adjustable through a 15° angle range for proper spring bar adjustment. See chart above.
HIGH-PERFORMANCE BALLMOUNT ADJUSTMENT
7" 4-1/2" 5-1/2"
8" 5-1/2" 6-1/2"
9" 6-1/2" 7-1/2"
10" 7-1/2" 8-1/2"
11' 8-1/2" 9-1/2"
-
EQUAL NUMBER OF
TEETH MUST
SHOW
15°
.
Install longer 3/4” bolt (J) with two serrated washers (E) as shown. Install lockwasher (L) and nut (K), but allow space
for washers to be positioned and aligned. Align the washers as shown, hold in position, and tighten nut. Torque the
two nuts (K) to 300 ft/lbs. If proper torque wrench is not available, torque nuts to 150 ft/lbs then turn nuts an additional
1/4 turn. Do not lubricate the threads.
CAUTION: Washer MUST BE aligned parallel with teeth on ballmount. Re-check washer alignment after nut is
tightened. Equal number of teeth must show at top and bottom. Teeth can be stripped when loaded if not properly
aligned.
66006IN-13JAN06H PCN7968 ©2006 TOWING PRODUCTS, INC Litho in USA
TEETH MUST
BE PARALLEL
2
Loading...