FORD 2010 F-550 v.2 - Manual (Page 179)

How to fasten the cinch tongue (Regular cab center seating
position and Super Cab/Crew Cab rear center seating positions)
1. Pull the combination lap and shoulder belt from the retractor so that
the shoulder belt portion of the safety belt crosses your shoulder and
chest.
2. Be sure the belt is not twisted. If the belt is twisted, remove the twist.
3. Insert the belt tongue into the proper buckle for your seating position
until you hear a snap and feel it latch.
4. Make sure the tongue is securely fastened to the buckle by pulling on
the tongue.
WARNING: The lap belt should fit snugly and as low as possible
around the hips, not across the waist.
While you are fastened in the safety belt, the combination lap/shoulder
belt with a cinch tongue adjusts to your movement. However, if you
brake hard, turn hard, or if your vehicle receives an impact of 5 mph
(8 km/h) or more, the safety belt will become locked and help reduce
your forward movement.
Lap belts
Adjusting the lap belt
WARNING: The lap belt should fit snugly and as low as possible
around the hips, not across the waist.
• 1st row center seating position on SuperCab and Crew Cab
The lap belt does not adjust automatically.
Seating and Safety Restraints
179
2010 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)