7.
Apply the tractor parking brakes.
WARNING
A visual inspection is required by law. Some im-
proper couplings can pass a pull test. Sound is
not reliable. Get out of the cab and look. Incor-
rect coupling could cause the trailer to discon-
nect, possibly resulting in serious personal injury
or death.
8.
Perform a coupling inspection, checking that
there is no gap between the bottom of the trailer
and the fifth wheel, and that the kingpin is se-
curely locked. See
Fig. 18.6
When lockup has occurred, the fifth wheel con-
trol handle moves to the locked position. Make
sure that the safety latch is down over the lock
control handle to hold the control handle in the
locked position. (The safety latch will only rotate
down if the operating rod is fully retracted in the
locked position.) See
Fig. 18.2
for Fontaine fifth
wheels. See
Fig. 18.3
for Holland fifth wheels.
9.
Release the tractor parking brakes. Test for king-
pin lockup slowly inching the tractor forward, pull-
ing on the trailer against the chocks.
10. After lockup is completed, 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 posi-
tioned so that they do not rub on anything. Rub-
bing may wear through hoses or cables, resulting
in air leaks, or exposed or broken wires, poten-
tially affecting trailer brake or electrical systems.
11. Charge the air brake system with air, checking
that the air connections do not leak.
WARNING
Incorrect fifth wheel lock adjustment could cause
the trailer to disconnect, possibly resulting in se-
rious personal injury or death.
12. With the trailer wheels chocked and the brakes
set, check for clearance between the kingpin and
the fifth wheel jaws by moving the tractor forward
and backward against the locked kingpin. If slack
is present, uncouple the trailer and have the fifth
wheel inspected and adjusted by a certified
technician.
Jost Fifth Wheel Coupling
1.
Tilt the ramp down.
2.
Open the kingpin locks. See
Fig. 18.7
.
3.
Back the vehicle close to the trailer, centering the
kingpin on the fifth wheel.
4.
Chock the trailer wheels.
5.
Connect the air lines and electrical cable.
6.
Ensure that the red trailer air supply valve (trailer
brake) is pulled out, and that the trailer parking
09/10/2010
f311125
A
B
A. Adjust trailer height
B. Ramps tilted down
Fig. 18.5, Trailer Connection Point, Low-Lube Fifth
Wheel
09/10/2010
f311126
A
B
A. No gap between trailer
and fifth wheel
B. Kingpin inside lock
Fig. 18.6, Coupling Inspection
Fifth Wheels
18.3
Summary of Contents for cascadia
Page 1: ...Driver s Manual CASCADIA Part Number STI 478 Publication Number STI 478 6 ...
Page 106: ...9 Cab Features Windows 9 1 Mirrors 9 1 Cab Amenities 9 1 Sleeper Amenities 9 2 ...
Page 163: ...16 Drive Axles Differential Locks 16 1 Two Speed Drive Axles 16 2 ...
Page 167: ...17 Steering System Power Steering System General Information 17 1 Power Steering Systems 17 1 ...
Page 180: ...19 Trailer Couplings Air Suspension Dump Valve 19 1 Holland Trailer Coupling 19 1 ...
Page 229: ...26 Specifications Fuses and Relays 26 1 Replacement Bulbs 26 3 Fluids and Lubricants 26 4 ...