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freightliner 122SD - Premier Trailer Couplings

freightliner 122SD
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Premier Trailer Couplings
General Information
IMPORTANT: Before operating the Premier cou-
pling, refer to the Premier web site at
www.premier-mfg.com for complete safety,
operation, and maintenance instructions.
Trailer couplings, used only on trucks, are attached
to the rear closing crossmember.
The Premier 260 and 460 trailer couplings have a
rigid pintle hook, and are air-adjusted. An air cham-
ber, mounted forward of the coupling, operates a
pushrod, which pushes against a shoe inside the
coupling. The shoe maintains constant pressure on
the eye of the trailer drawbar when it’s over the pintle
hook. See
Fig. 18.2. This takes up any slack in the
trailer connection, providing smoother towing and
less wear on the pintle hook. The air pressure is acti-
vated when the trailer brakes are released.
The Premier 690 trailer coupling has a moveable
pintle hook, and is non-air adjusted. It is used for
heavy-duty applications. See
Fig. 18.3.
Operation
WARNING
If at any time the 690 coupling is bound up (jack-
knifed), the 294 bolt MUST be replaced immedi-
ately! Do not use the coupling until the bolt has
been replaced. In addition, carefully inspect the
690 coupling, drawbar, drawbar eye, front end
assembly, and tail board for damage. Failure to
do so may result in trailer separation from the
truck while in use, resulting in serious personal
injury or property damage.
Trailer Hookup
1.
Chock the front and rear tires of the trailer.
2.
Open the coupling.
Models 260 and 460: Pull up on the pawl lock;
then, while squeezing the pawl wedges together,
lift up the pawl assembly. Lift up the latch, and
push it up against the pawl assembly, locking the
latch in place. See
Fig. 18.2.
Model 690: Remove the linch pin from the
handle, then push in on the handle and turn it
toward you. Open the pintle hook by pulling it
down and toward you. Release the handle, lock-
ing the pintle hook open. See
Fig. 18.3.
1
2
3
4
5
6
1
2
3
4
5
6
A
B
01/20/95
f310312a
A. Model 260 B. Model 460
1. Pintle Hook
2. Latch
3. Pawl Assembly
4. Pawl Lock
5. Pawl Wedge
6. Shoe
Fig. 18.2, Premier 260 and 460 Trailer Couplings
Trailer Couplings
18.2

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