Blue Ox BX8893 - Manual (Page 10)

BX8893
AutoStop™
Operation Manual & Installation Instructions
292-2214 Rev A Page 10 of 12 10/4/13
continued from previous page
Figure 19
Figure 18
Figure 17
Figure 16
Bottom View of AutoStop™
The AutoStop™ "Load Ranger" is equipped with a return spring and an adjusting nut to set the spring
pre-load in proportion to the weight of the towed vehicle. This pre-load will not allow the activation of
the towed vehicle's brakes during light braking of the towing vehicle. This also prevents application
of the towed vehicle's brakes when descending a moderate grade against engine compression, jake
brake or exhaust brake, but still allows proportional braking when the towing vehicle's service brakes
are applied. Before making any adjustment, drive the rig a few blocks and re-check the installation for
proper cable slack. With a flat blade screwdriver, rotate the adjusting nut upward with a down motion
of the screwdriver handle to increase the preload. This will move the nut in the direction of the towing
vehicle, compressing the return spring. Continue to rotate the adjusting nut to the desired preload. If
you desire the AutoStop™ to activate only during very heavy braking, adjust to the max. setting. After
your initial setting, adjust to your driving preference if needed. The location of the adjusting nut is
shown in Figure 20. The initial preload ranges are listed below.
Suggested initial preload ranges are:
1/4" - Towed vehicle under 2,000 lbs.
1/2" - 2,000 to 3,500 lbs.
3/4" - 3,500 to 5,000 lbs.
1" - Maximum preload
Figure 20
AutoStop™ Adjustment