Ford Ranger Owner's Handbook Manual page 83

Maintenance
WARNING
Remove the tow ball arm and
protect the seat with the plug before
steam cleaning your vehicle.
Keep the system clean.
Periodically lubricate the tow ball
mechanism with resin-free grease or oil
and the lock with graphite.
Keep a note of the key number. In case
of loss, replacement keys are available
from the manufacturer by stating the
4-digit key number.
Towing
81