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Coupling, Uncoupling – SAF-HOLLAND XL-FW311 XA-2801-03185 Series Elevating Fifth Wheel Top Plates User Manual

Page 2

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COUPLING

(continued)

4.

Back under the trailer, engaging the fifth wheel

locks with the trailer kingpin. Pull forward to test

the completeness of the coupling as an initial

check. Set the tractor brakes. Next, visually
inspect the fifth wheel, as shown in FIGURE 3, to
verify that it is properly locked.

Failure to verify a proper couple can
result in tractor and trailer separation

which, if not avoided, could result in death or
serious injury.

5.

If operation on public streets or highways is

required, the manual secondary lock must be

engaged. To engage the secondary lock, remove

the handle loop end from the parking hole in the

top plate and allow the handle to move in and

allow the secondary lock to pivot behind the

locking yoke, as shown in FIGURE 4. See the
warning.

6.

Remove blocks. Release tractor and trailer brakes.

Raise trailer to desired height and move trailer.

IMPORTANT:

Elevating fifth wheels in the elevated
position are less stable than standard
fifth wheels. To avoid rollovers, do
not travel at excessive speeds, and do
not make sudden turns or maneuvers.

2

XL-FW311-03 Rev B

LOCKS COMPLETELY CLOSED AROUND KINGPIN

View looking into the throat of the fith wheel

Bolster plate is flush

with the fifth wheel

FIGURE 3

Failure to operate elevating fifth wheel
in the down position will reduce vehicle

stability which could cause death or serious injury.

IMPORTANT: This unit is not recommended for

operation on public streets and

highways. When such trailer

moves are necessary, the manual

secondary lock on the fifth wheel

must be engaged (see coupling

procedure #5 above) and the

fifth wheel must be in the

down position. Limit speed to

45mph maximum.

UNCOUPLING

1.

Position the trailer in the desired location and set

the TRAILER brakes. The TRACTOR brakes

should be released.

2.

Lower the trailer until it rests on its trailer

(landing gear) supports. Assure firm ground

support for the landing gear.

3.

Block the trailer wheels, disconnect and store air

and light lines.

4.

Check to see if the secondary lock is engaged.

If engaged, release it by pulling the secondary

lock handle. To keep the secondary lock open,

place the handle loop end in the parking hole in

the top plate. This holds the secondary lock away

from the locking yoke.

5.

While holding the lock control valve in, slowly

pull out from the trailer.

6.

After driving completely free from the kingpin,

release the lock control valve.

FIGURE 4

SECONDARY LOCK

PARKING HOLE

HANDLE LOOP END “IN” -
SECONDARY LOCK PIVOTS
BEHIND LOCKING YOKE

YOKE