Draw-Tite 7979 دليل المستخدم

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INSTALLATION / OPERATION INSTRUCTIONS
WEIGHT DISTRIBUTING HITCH SYSTEMS

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

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.

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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)

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9. Hold the spring bar (3) perpendicular to the shank (1). Insert the upper trunnion pin into the upper pocket of the head assembly [See figure 6]. Rotate the spring bar so the lower trunnion pin passes through the entrance slot in the lower pocket of the head assembly. Figure 5 Figure 6 Figure 7 10. Position lift units on trailer “A” frame. If trailer tongue consists of a single tube or other narrow member, a pole tongue adapter (Draw-Tite P/N 3280) must be used. Ho

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ADJUST HOOKUP (IF NECESSARY) A weight distributing system is properly set up and coupled when the tow vehicle has settled with the front wheel opening “F” at the original uncoupled dimension measured and slightly lower in the rear ”R”. See Figure 11. Figure 11 • This will assure the front wheel load remains unchanged. This results in good handling and the desired load on the rear axle and trailer axle. • The front of the vehicle should never settle more than the rear. See Figure

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WARNINGS FAILURE TO HEED MAY RESULT IN SERIOUS PERSONAL INJURY OR DEATH, VEHICLE CRASH, AND / OR PROPERTY DAMAGE COUPLED BALL HEIGHT SHOULD NEVER BE GREATER THAN UNCOUPLED BALL HEIGHT. Front wheel overload and loss of rear wheel traction can result. This can lead to unstable handling, reduced braking ability, and a tendency to “jackknife” when turning. USE EXTREME CAUTION WHEN BACKING UP AND TURNING. DO NOT ALLOW TOW VEHICLE AND TRAILER TO MANEUVER INTO A “JACKKNIFE” POSITION. Co