Product Manual

page 3
The height of the ball must be determined before any assembly
work can be started.
To get ball height, measure trailer from ground level to top
of ball coupler. Be sure trailer is parallel to ground. To this
measurement add approximately 1/8'' for each 100 lbs. tongue
weight for tow cars without overloads. For cars with overloads,
or trucks, add approximately 1/16'' for each 100 lbs. tongue
weight. This will compensate for vehicle “squat.”
After ball height has been determined: write down the
ascertained height.
EXAMPLE: Measured top of
coupler height was 17'' from
ground, trailer hitch weight
(weight coupler would impose
on ball, downward) is 600
lbs. (6 x 1/8'' for car without
overloads = 3/4''.) Therefore,
3/4'' + 17''= 17-3/4'' hitch
setting height (to top of ball;
assembled.)
Slide shank into sleeve receiver; insert hitch pin (48021) and
spring clip (57527). With ball attached to ball mount, slide ball
mount up or down shank (shank may be used in the up or down
position) until nearest dimension is obtained and holes line up
with shank. Insert bolt in bottom hole first (rest hitch head
.)
Rivet (12a) and 8 spacer washers (12b) are supplied in order
to gain correct downward angle of spring bars. Insert rivet, and
depending on angle or slope of bars that must be gained, use
either 8 or the least amount of washers necessary in order to
establish correct angle. (See Fig. 1, 2, and 3 below.)
The rivet and its accompanying washers are placed in the 1/2''
hole between the “U” on ball mount to acquire desired angle of
spring bar. Once spring bar angle has been determined, insert
top bolt (12f) with serrated washer (12c). Install second serrated
washer and nut (12g) to secure unit in correct position, now
insert bottom bolt (12f) and nut (12g). Before tightening bolts,
lock set screw (48103). Tighten the 3/4" top bolt to 260 ft. lbs.
torque once head angle is set. Secure lower bolt to 260 ft. lbs.
torque. After first day of towing, check set screw for tightness.
BEFORE HOOKING UP
Spring bars should hang down on a 10º to 13º
angle when ball mount has been tilted back at 6º
to 8º angle.
AFTER HOOKING UP
Spring bar should be parallel with trailer frame, or a
slight angle up or down.
WRONG
Readjust degree of tilt on ball mount, if you have
more than 5 links of chain hanging free. The number
of links should be the same on both bars.
MAXIMUM TILT DOWN
WITH 8 WASHERS ON
RIVET
MAXIMUM TILT UP WITH
RIVET ONLY
EACH WASHER LOWERS CHAIN END OF SPRING BAR APPROX 1-1/2''
BOLT-TOGETHER BALL MOUNT HAS 7-1/2'' ADJUSTMENT,
EACH ADJUSTMENT 1-1/4''
EXTRA HI-LOW SHANKS AVAILABLE IF NEEDED
www.eaz-lift.com
INSTALLATION INSTRUCTIONS
FOR BALL MOUNT
1 3
2
4
PAGE 3
TOP OF
BALL CUP
GROUND LEVEL
TRAILER