TM 9-2320-283-10
f. Unlock the fifth wheel by first pulling the primary lock release pull ring. Then,
pull the secondary lock release handle out.
g. Enter cab and slowly pull the truck forward until the trailer kingpin is free from
the lock guard and the landing gear is supporting the trailer weight. Then,stop
and pause for a moment. Do not pull all the way out from under the trailer yet
to ensure the landing gear will support the trailer. If it collapses, the rear frame
area of your truck will be able to catch the front of the trailer before equipment
damage occurs.
h. Have a crew member observe semitrailer kingpin to make sure it clears properly
during separation of the vehicles. Make sure the kingpin will clear the rear frame
crossmember when you pull the tractor out from under the trailer.
i.
Pull slowly forward allowing the semitrailer gooseneck and kingpin to totally clear
the rear frame area of your tractor.
TA 236682
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