OPERATING INSTRUCTIONS
4-17
TABLE OF CONTENTS
Dock Lift Arm Control Operation
(Option)
DANGER
DANGER
1. Dock loading is achieved with the Axle/Tail Control
Knob and Dock Lift Arm Control Button (Manual)
Switch (Remote) located on the control panel (See
Figure 3-3.)
IMPORTANT
The Axle/Tail Control Knob is used for both
loading/unloading and dock lift arm operations. (See
Table 3-1) for use of the tail control knob in
loading/unloading applications.
2. The Axle/Tail Control knob has three positions:
Table 3-3: Axle/Tail Control Knob
3. The Dock Lift Arm Control Button/Switch has two
positions:
Table 3-4: Dock Lift Arm Control Button/Switch
4. Park the semitrailer in front of dock according to
instructions in “Parking the Trailer” on page 3-8.
5. Engage hydraulic power supply.
6. Use Axle/Tail Control Knob to pull undercarriage
forward approximately 30" (See Figure 3-7.)
7. Engage Dock Lift Arm Control Button/Switch and
hold while using Axle/Tail Control Knob to return
undercarriage rearward to obtain dock height.
8. Switch air ride suspension to lower ON position,
stabilizing trailer while loading or unloading at dock.
WARNING
9. To return to transport position, switch air ride
suspension to transport OFF position.
10. Using the Axle/Tail Control Knob, pull undercarriage
forward approximately 30". This returns tail deck
height and disengages dock level arm.
11. Return undercarriage to transport position, using
Axle/Tail Control Knob, until hydraulic system works
against the fully extended hydraulic axle cylinder.
12. Shut off the hydraulic power.
When using dock lift arm, the semitrailer must be
kept level at all times. Do not lower the parking
stands. Loads being placed on the semitrailer
must be kept centered on the semitrailer. An
unlevel semitrailer may allow a load to slide,
causing injury or death to anyone near the load!
1. Do not operate dock lift arm with insufficient
space on both sides of the semitrailer.
Semitrailer will lean toward the side with the
shortest cylinder. Persons or equipment can
be crushed between semitrailer side and rigid
objects.
2. Tractor park brakes must be set when using
dock lift arm.
AXLE/TAILCONTROL KNOB
PUSH IN
In this position, the undercarriage
slides forward lowering the tail for
loading.
CENTER This is the neutral position.
PULL OUT
In this position, the undercarriage
slides to the rear raising the tail The
undercarriage must be in the rear-most
position for transport.
DOCK LIFT ARM CONTROL BUTTON/SWITCH
ENGAGE
(IN)
In this position, the dock level arm lifts
the approach plate to dock height.
DISENGAGE
(OUT)
This is the neutral position for the dock
level arm.
When using the dock level, make sure the dock
level arm is supporting the tail before pulling
away from the dock. Failure to do so may result in
damage to the trailer or severe personal injury.
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