Draw-Tite 7979, 7901, 7903, 7902 User Manual

7901=600LB WDH KIT, 7902=800LB WDH KIT, 7903=1200LB WDH KIT, 7979=HEAD KIT

NOTE: When selecting a shank, select the shortest unit that provides clearance with all the accessories on the tow vehicle and the trailer. This will maximize weight distributing and handling characteristics.

DO NOT EXCEED TOWING VEHICLE MANUFACTURER’S LOAD RATINGS

SPRING MAX. TONGUE MAX. GROSS TRAILER BAR WEIGHT(LB) WEIGHT (LB)

RATING WHEN USED AS A WEIGHT "600" 600 12,000 DISTRIBUTING HITCH WITH SPRING "800" 800 12,000 BARS SHOWN: "1200" 1200 12,000

RATING WHEN USED AS A WEIGHT CARRYING BALL MOUNT WITHOUT 7979 600 6,000 SPRING BARS:

INTRODUCTION When a trailer is hitched to a tow vehicle, the tongue weight typically causes the rear of the tow vehicle to lower and the front to raise. See Figure 1.

WEIGHT DISTRIBUTING HITCH SYSTEMS

7901, 7902, 7903, 7979 (DUAL SWAY CONTROL ATTACHMENT)

INSTALLATION / OPERATION INSTRUCTIONS

Figure 1

The purpose of a weight distributing hitch is to remove excessive weight from the tow vehicle’s rear axle and distribute it to the front wheels and the trailer wheels. See Figure 2.

Figure 2

SETUP DIMENSIONS

1. Line up tow vehicle and trailer on level pavement, in a straight-ahead position, uncoupled.

2. For vehicles with air springs, air shocks or automatic leveling systems, check vehicle owner's manual. Unless otherwise specified, level the vehicle with the vehicle loaded as it will be when towing. Deactivate load leveling system before coupling trailer and adjusting spring bars.

3. Measure and record uncoupled height on front and rear wheel openings to pavement and level trailer coupler height [See figure 3].

Figure 3

F = _________ R = _ H = ___

7900 – 01APR05C PCN7753  2005 TOWING PRODUCTS, INC Litho in USA

Figure 4

READ ALL INSTRUCTIONS AND CHECK PACKAGE CONTENTS

ASSEMBLE SYSTEM

1. Insert shank into receiver and install pin and clip [See figure 4].

2. Select hitch ball to match trailer coupler socket, having 1” or 1 - 1/4” threaded shank and capacity equal to or exceeding the gross trailer weight. When using a ball with a 1” shank, bushing (6a) must be used. Attach the ball to the head assembly (2) using a lockwasher and nut.

3. Assemble head to shank as shown in Figure 4. Use (6) hardened washers (6i) over pin (6h) initially.

4. Align head assembly bolt holes to the nearest holes on shank that corresponds to a ball height approximately 1.5 - 2” higher than trailer coupler height ”H”. Leave fasteners loose until hookup has been adjusted.

5. Tighten ball nut according to manufacturer’s specs. Always use a lockwasher.

6. Assemble chains to spring bars as shown in Figure 4. Allow 2 - 3 threads to protrude below locknut [See figure 5]. Chain must not bind.

7. Lower trailer coupler onto hitch ball and close coupler latch.

8. Apply a heavy oil or wheel bearing type grease to the upper and lower trunnion pin of each spring bar assembly.