The fifth wheel is now in the lockset posi-
tion and is ready for uncoupling. As the
tractor pulls away from the trailer the king-
pin forces the jaw to rotate, contacting the
lock. Continued rotation of the jaw forces
the lock to move outward, and drops the
upper rod back into the slot. See
Fig. 18.9
View D. The wheel is now ready for
coupling.
6.3
Jost:
Pull the retractable handle out, then
secure it in the open position with the
catch. See
Fig. 18.7
.
7.
Release the tractor parking brake then drive out
slowly, allowing the trailer to slide down the fifth
wheel and pick-up ramps.
Air-Actuated Uncoupling
An air-actuated kingpin release valve is optional with
all fifth wheels. See
Fig. 18.10
.
NOTE: In the event of an air system failure, air-
actuated kingpins can be manually released fol-
lowing the instructions for manual unlocking.
WARNING
Once the kingpin release valve has been pulled
the kingpin lock is released. The vehicle MUST
NOT be driven with the trailer until the trailer has
been uncoupled and coupled again. Failure to do
so may result in separation of the trailer from the
tractor, possibly causing serious personal injury
or death.
Preparing the Trailer for Uncoupling
Before using the air valve to unlock a fifth wheel
kingpin, prepare the trailer as follows.
1.
Apply the tractor and trailer parking brakes.
2.
Chock the trailer rear wheels.
3.
Lower the trailer landing gear until the weight is
removed from the fifth wheel.
4.
Disconnect the tractor-to-trailer air lines and elec-
trical cable. Plug the air lines to prevent dirt or
foreign material from entering the lines.
Fontaine and Holland Fifth Wheels Air-
Activated Kingpin Unlock
1.
Verify that both the yellow parking-brake and red
trailer-air supply knobs are out, the tractor and
trailer parking brakes are set, and that the trailer
is prepared for uncoupling.
NOTE: On Fontaine and Holland fifth wheels, if
the tractor parking brake is not set, the air-
actuated kingpin-release valve will not activate.
09/10/2010
f311127
OK
OK
Fig. 18.8, Jost Release Handle Locked
Fifth Wheels
18.5
Содержание cascadia
Страница 1: ...Driver s Manual CASCADIA Part Number STI 478 Publication Number STI 478 6 ...
Страница 106: ...9 Cab Features Windows 9 1 Mirrors 9 1 Cab Amenities 9 1 Sleeper Amenities 9 2 ...
Страница 110: ...10 Engine Starting Operation and Shutdown Engine Starting 10 1 Engine Operation 10 2 Engine Shutdown 10 4 ...
Страница 129: ...13 Brake Systems Air Brake System 13 1 Meritor WABCO Antilock Braking System 13 3 Engine Brake 13 5 ...
Страница 163: ...16 Drive Axles Differential Locks 16 1 Two Speed Drive Axles 16 2 ...
Страница 167: ...17 Steering System Power Steering System General Information 17 1 Power Steering Systems 17 1 ...
Страница 180: ...19 Trailer Couplings Air Suspension Dump Valve 19 1 Holland Trailer Coupling 19 1 ...
Страница 206: ...23 Headlight Aiming Preliminary Checks 23 1 Checking Headlight Aim 23 1 Adjusting Headlight Aim 23 1 ...
Страница 229: ...26 Specifications Fuses and Relays 26 1 Replacement Bulbs 26 3 Fluids and Lubricants 26 4 ...