XL-AS20016BM-en-US Rev A · 2015-05-28 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Operation Instructions
16
12. PosiLok
™
Anti-Dock Walk
The CBX slider suspension with Auto-PosiLift
™
is equipped with
SAF-HOLLAND
®
PosiLok
™
which provides enhanced trailer
stability during loading and unloading operations. If the
trailer air control system employs a “spring brake priority”
type arrangement, potential field service issues could arise
due to operational misuse, such as:
Moving a trailer before the air springs have been
properly inflated.
Use of yard hustler equipment.
Heavy load operations, such as paper haul, with the slider
in the full forward position.
Engaging the emergency trailer brakes at a high rate of
speed (greater than 5 mph) to move the slider position.
Use of an auxiliary suspension dump valve with
excessive flow.
Going in and out of ramped docks with slider all the
way forward.
The SAF-HOLLAND
®
PosiLok
™
system will properly support
the trailer during normal operations and is designed to bend
or buckle when subjected to overloading or other operational
issues to protect the trailer sub-frame.
The PosiLok
™
is engaged when the flipper
plates are in the down position.
Release air pressure from the trailer brake system or
disconnect the glad hand. This engages the parking brakes
and causes the PosiLok
™
actuator to engage, which rotates
the rod so the flipper plates swing down into an engaged
position
(Figure 28)
.
The PosiLok
™
is disengaged when the flipper
plates are in the up position.
When the parking brakes are disengaged, the primary height
control valve (HCV) takes full function. When the system
has sufficient air pressure in the suspension air springs, the
actuator extends, rotating the rod so the flipper plates
swing up away from the load pads into a disengaged
position
(Figure 29)
. The vehicle is now ready for movement.
IMPORTANT:
DO NOT operate vehicle (put in motion) if
flipper plates are trapped in the down position
(Figure 30)
. Refer to the troubleshooting
section of Installation and Operation Manual
XL-AR408. Available at www.safholland.us
or contact SAF-HOLLAND
®
Customer Service
at 888-396-6501.
Failure to adequately raise flipper
plates could result in trailer, suspension
component, and cargo damage.
FLIPPER PLATE IN THE
ENGAGED POSITION
Figure 28
Figure 29
FLIPPER PLATE IN THE
DISENGAGED POSITION
Figure 30
FLIPPER PLATE
TRAPPED IN THE
DOWN POSITION
