Operating Procedures
NOTE: When uncoupling the type “A” fifth
wheel, it is normal for the release
handle to move to the closed
position. It is not necessary to pull
the release handle to recouple.
If you DO NOT obtain a
proper coupling, repeat this
sequence. DO NOT use any
fifth wheel which fails to
operate properly.
9. If your fifth wheel is equipped with a
manual secondary lock, engage it.
10. Using low gear, retract the landing gear
until unloaded. Then shift into high gear
and continue cranking until they are
fully retracted. Fold down or remove the
crank handle and place it in the crank
handle holder.
11. Check the brake lines and light cord.
12. Remove the wheel blocks and continue
with pre-trip inspection.
8. Uncoupling Procedures
1. Set trailer brakes with the tractor
protection switch.
2. Back into the kingpin and set the
emergency brake on the tractor.
3. Bock the trailer wheels.
4. Wind down the landing gears in high gear
until they touch the ground. Shift to low
gear and crank a few extra turns. DO NOT
raise the trailer off the fifth wheel. It may
be necessary to provide a base for landing
gear in poor parking conditions. Fold
down or remove the crank handle and
place it in the crank handle holder.
5. Disconnect the light cord and brake
lines. Attach the dummy air coupling to
keep foreign material from entering the
brake lines.
6. Unlock the fifth wheel, including the
manual secondary lock if so equipped.
7. Release the tractor emergency brake and
pull out slowly from under the trailer.
Let the trailer slide down the fifth wheel
and pick-up ramps, being careful that the
trailer landing gear touches the ground
with minimal impact.
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