Airstream INTERNATIONAL TRAILER Owner's Manual page 22

AIRSTREAM INTERNATIONAL TRAILER OWNERS MANUAL
Note: Level the trailer end to end, then measure from the
ground to the top of the ball socket to determine the coupler
height on the trailer.
Attach the safety chains (see figure 10) to the welded portion
of the hitch or tow vehicle's frame, but never to the removable
ball mount. Cross the safety chains under the hitch.
Caution
: retract the hitch jack completely for
maximum ground clearance. Remove the jack pad (See
Figure 12) and stow in the car's truck along with the
leveling jack and other gear used when stopped. NEVER
TOW YOUR TRAILER WITH THE JACK DOWN.
Check that the foldaway step is up and that the main door
is completely closed and the deadbolt LOCKED for towing.
If it is not locked the constant vibration of travel may cause
the main door to open with possible damage.
Move the rig ahead about 50 feet and test the trailer
brakes, then check the ground for forgotten objects.
Regularly check the condition of your tires, air
pressure, and the tightness of your lug bolts.
Fig 12
B-8