the kingpin,
stop
after sliding under the trailer.
Then resume backing up slowly until the fifth
wheel locks.
9.
Apply the tractor parking brakes.
WARNING
A visual inspection is required by law.
Some improper couplings can pass a pull test.
Sound is not reliable.
Get out of the cab and look.
Incorrect coupling could cause the trailer to
disconnect, possibly resulting in serious
personal injury or death.
10. Perform a coupling inspection.
10.1
Verify that there is no gap between the
bottom of the trailer and the fifth wheel as
shown in
10.2
Make sure the jaw and wedge of the fifth
wheel are locked in place behind the
kingpin as shown in
10.3
Check that the lock control handle is fully
retracted as shown in
; the gap
between the back of the pull handle and
the skirt of the fifth wheel should be
less
than
one inch as shown in
WARNING
Incorrect fifth wheel locking could cause the
trailer to disconnect, possibly resulting in serious
personal injury or death.
11. Release the tractor parking brakes.
Test for kingpin lockup by slowly inching the
tractor forward, pulling on the trailer against the
chocks.
12. After lockup is completed and verified, connect
the tractor-to-trailer air system lines and the
electrical cable to the trailer. Take care to prevent
dirt or foreign material from entering the air
system lines.
NOTICE
Always make sure the connection hanger keeps
the trailer air hoses and electrical cables
positioned so that they do not rub on anything.
Rubbing may wear through hoses or cables,
resulting in air leaks, or exposed or broken wires,
potentially affecting trailer brake or electrical
systems.
13. Charge the air brake system with air, checking
that the air connections do not leak.
14. Fully retract the landing gear legs and secure the
crank handle.
15. Remove the chocks.
Holland Fifth Wheels Coupling
1.
Chock the front and rear of the trailer tires to
prevent the trailer from moving.
2.
If equipped with a
standard fifth wheel
, check
the surface of the fifth wheel for a liberal coating
of grease.
If equipped with a
no- or low-lube fifth wheel
plate,
ensure there are no sharp edges, nuts,
bolts, gouges, or large holes along the leading
edge of the trailer or in the path of the fifth
wheel, as shown in
, and that any
residual grease on the upper coupler is free of
coarse grit.
f311126
04/28/2017
A
B
A. Check that there is no gap between the trailer and
fifth wheel.
B. Verify the kingpin is locked in the fifth wheel jaws.
Fig. 14.5, Coupling Inspection View
f311363
08/23/2021
A
1
2
A. Make sure there is less than a one inch gap
between the back of the pull hand and the fifth
wheel skirt.
1.
Pull Handle
2.
Skirt of Fifth Wheel
Fig. 14.6, Fontaine Fifth Wheel Handle Retracted
Fifth Wheels
14.3
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