110 lb. (50 kg), is mounted on the right side of the launch frame and incorporates manual
operation for each slice, allowing local control in the event of an electrical failure.
The beam drive control valve slice is directly connected to the beam drive hydraulic motor
with an external counterbalance valve to prevent overrun and a spring on, hydraulically-released
The remaining two `slices' control the beam angle and the carriage winch functions. The
articulator valve `slice' sets the beam angle by controlling the position of the articulating hydraulic
cylinders. The cylinders are connected to the articulator valve `slice' via counterbalance valves to
hold the angled position of the beam. The carriage winch `slice' controls the speed of all carriage
winch functions, but functions are selected on the carriage manifold.
1-10-19 Slide Frame
After deployment of the tail lift, A-Frame and launch frame, the slide frame is used to create the
work area required (between the crane and the A-Frame) to position the launch beam and
bridging modules for loading. It comprises a telescopic frame, relax mechanism and tilt rollers.
1-10-20 Telescopic Frame
The frame comprises of three pairs of telescopic steel box sections. The inner (forward)
box sections attach to the vehicle chassis via the relax mechanism and the outer (rear) box
sections connect to the A-Frame by a hinged arrangement on the transverse beam of the lower
A-Frame. The center sub-frame attaching the inner and outer sub-frames.
The center sub-frame has removable rollers on each longitudinal beam, which must be
installed on to the slide frame prior to bridge deployment and removed prior to slide frame
retraction. The outer sub-frame has adjustable tilt rollers attached which ensure that the carriage
slings remain taut and that varying bank heights can be accommodated during bridge
The outer box sections are cross connected by two cross members, one incorporates
attachments for the A-Frame rotate cylinders, the second attachment for the articulating cylinders.
All slide frame sections are fitted with rubbing pads to ease the extension and retraction of the
slide frame. Twist-lock blocks mounted on a bracket at either side of the outer sub-frame; retain
the slide frame in the transportation position until released for deployment. Release of the twist-
lock fasteners allows the deployment of the slide frame by driving the vehicle forwards. The twist-
lock fasteners are reset when the vehicle is reversed to retract the slide frame on completion of