Harmar Mobility AL001 - Manual (Page 4)

Step.3
Screw spring pull pin into carrier. Add reflectors. See the figure.
Step.4
Screw spring pull pin into jam nut. Screw spring pull pin into ramp
bracket. Bolt bracket to frame. Secure with nuts and lock washers.
See the figure.
NOTE! To prevent loosening of the spring pull pin, torque the jam
nut tightly against the ramp bracket.
When in use:
Use safety pin to adjust the hitch. See the figure.