Installation Guide

CURTMFG.COM
•
PRODUCT SUPPORT: 877.287.8634
•
17500-INS-RD
•
12/08/2021
•
ECN8701
•
PAGE 4
Step 4 - Install the shank, hitch head and ball
Insert the adjustable shank (#2) into the receiver tube on the tow
vehicle and secure with the provided hitch pin & clip (#11). Note: To
obtain the proper ball height on high-ground-clearance vehicles, the
shank may be inverted as shown below. If the shank is used in the
inverted position, check for adequate ground clearance.
Step 8 - Install the spring bars
Secure the two spring bars (#3) with the wire lock lynch pins (#10).
Step 11
Place a carriage bolt through the top hole on all three support
brackets, spin the nylock nut loosely onto the bolt and hang the
assembly over the trailer A-frame on the center line from Step 10.
Note: The wide channel bracket should be installed
over the narrow channel as detailed below.
Step 5
Position the hitch head (#1) on the adjustable shank (#2). Slide the head
up or down to the nearest bolt hole alignment position that corresponds
with the target uncoupled ball height determined in Step 3.
Mark the position on the shank.
Step 6
Set the initial tilt position and loosely attach the hitch head (#1)
to the adjustable shank (#2) in the position determined in Step 5.
For initial setup, place the head tilt spacers (#6)
into the position shown below.
Step 7
Tighten the 3/4"-10 hex bolts (#7, #9) just enough to hold the
spacers (#6) into the hitch head (#1). These bolts will be
tightened after the correct tilt setting has been determined.
Step 9
Using the trailer tongue jack, lower the coupler onto the trailer
ball and close the coupler latch. Do not retract the jack fully at this
time. Allow the jack to support some of the tongue weight.
Raise the front of the trailer and back of the tow vehicle
approximately 3" with the tongue jack. This will allow easier
installation of the spring bars onto the support brackets.
Step 10 - Installing the spring bar support brackets
Mark the position of the support brackets (#4) by making a center
line on the trailer A-frame 4" in from the end of the spring bars (#3).
Detail A
Wide channel bracket
Narrow channel bracket
Closest position
to target height
Upright
position
Inverted
position