Labrie EXPERT Maintenance Manual page 219

When the tailgate is unlocked/open, the tailgate cylinder is partially/fully extended and no triggering
of the proximity switch occurs; the cylinder having moved downward away from the switch
activates the backup alarm and a warning buzzer inside the cab. This also turns on the T
U warning light in the cab and disables packing.
NLOCKED
When the tailgate is closed/locked, the tailgate cylinder is fully retracted and triggering of the
proximity switch occurs; the cylinder having moved upward toward the switch
triggered, the warning buzzer and backup alarm stop sounding, the T
light turns off and packing operation can resume.
However, some troubles may occur if the tailgate unlocked proximity switch is out of adjustment. For
example, the tailgate is locked but the in-cab buzzer is still sounding or the T
warning light is off while the tailgate is still open. In such cases, adjusting the tailgate unlocked
proximity switch is required.
Figure 3-303 Location of tailgate unlocked proximity switch
Figure 3-304 Proximity switch support assembly
1. The first thing the tailgate cylinder does when the operator presses and holds the T
the cylinder head moving away from the proximity switch, thus making triggering no more possible.
2. The last thing the tailgate cylinder does when the operator presses and holds the T
the cylinder head moving closer to the proximity switch, thus making triggering possible.
Bracket
General Maintenance 209
2
. When the switch is
U
AILGATE NLOCKED
AILGATE
Proximity
switch
Cylinder
U switch is to unlock the tailgate, resulting in
AILGATE P
D switch is to lock the tailgate, resulting in
AILGATE OWN
1
. This
AILGATE
warning
U
NLOCKED