Installation Guide

CURTMFG.COM
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PRODUCT SUPPORT: 877.287.8634
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17500-INS-RD
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12/08/2021
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ECN8701
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PAGE 5
Step 12
Slide the L-support in between the two captive support brackets as
shown. Set the bracket height closest to the spring bar position set
with the jack in Step 9. Install the second carriage bolt in the first
hole directly below the trailer A-frame.
With the L-bracket installed, tighten both nylock nuts to 25 lb-ft.
Step 15
Pry the spring bar onto the L-bracket by rotating the lift bar to vertical.
With the spring bar supported by the L-bracket, remove the lift handle.
Secure the spring bar by installing the retainer clip and cotter pin.
Step 17 - Adjusting head tilt
If your tow vehicle cannot be leveled with the initial 'Position 1'
head setting, increase the tilt position. Increasing head tilt will
allow more tension to be applied to the arms. The list below
shows the change in spring bar height for each position setting.
Distance X:
Position 1 - 9.25
Position 2 - 10.75
Position 3 - 12.75
Position 4 - 14.75
Position 5 - 16
After the correct tilt position has been determined and the
tow vehicle is sitting level, the 3/4" bolts must be torqued.
Tighten 3/4" hex bolts and nylock nuts to 200 lb-ft. Failure
to tighten the bolts may result in a complete system failure.
Step 13
Repeat Steps 10 through 12 with the second support
bracket on the opposite side of the trailer A-frame.
WARNING
Keep clear of the pivot path of all moving parts when there is tension
on the spring bar. Maintain control of the lift handle at all times when
raising or lowering the spring bar. Be sure that the locking clip and
cotter pin are in place once the spring bar is in position.
Step 14 - Raise the spring bars
Pull the spring bar out from the A-frame and
hook the lift bar into the L-bracket as shown.
Step 16
Check the vehicle height and adjust the spring bars if necessary.
With the spring bars secured, lower the jack to apply load to the hitch.
The vehicle should settle evenly. Remeasure the front and rear bumper
reference points. If the front has settled much more than the rear, lower
the L-brackets to reduce the load on the spring bars. The spring bars
should be nearly horizontal when correct height is achieved.
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