Autoquip BASCULE BRIDGE - DOUBLE LEAF - Manual (Page 15)

CAUTION!
INSTALLATION INSTRUCTIONS
Precaution should be taken to prevent the introduction of
contaminates such as dirt or other foreign material into the system
through open fittings, pipes, or disassembled components.
Contamination will ruin the hydraulic system .
9. Connect the power unit to the lift and safety leg cylinders. Refer to the hydraulic
schematic in the Maintenance Section of this manual. Pipe that is used must be
Schedule 80 with extra heavy fittings. All hoses, fittings, and pipe is to have a
rated operating pressure of 3000 PSI minimum. Apply the recommended pipe
sealant to insure a pressure tight fit. Check the routing of the hydraulic lines to be
sure that the hoses and pipes are clear of all moving parts and remain within the
24” cutout area (for pit mounted power units) or an 18” storage area (for remote ly
mounted power units). Do not use Teflon tape.
BRIDGE ADJUSTMENTS
10. Carefully raise (to only about half way) and lower the bridge a few times. Then,
slowly raise it to the full vertical position but not beyond a vertical position, or
you may destroy the rams.
11. If the bridge does not go all the way to the desired vertical position and the ram (or
rams) are at the end of their strokes, add shims under the base clevis until the
correct posture is reached. On multiple ram bridges, all rams must reach the end
of their strokes in unison. Shim carefully so that no ram “bottoms out” ahead of the
other rams, or it can be damaged by having to resist the forces of all other rams in
addition to its own.
12. If the bridge is at its correct vertical position but the cylinders are not all the way
out (which could let the bridge go beyond vertical), remove the shims from under
the base clevis. Test this by carefully inching the bridge after it has reached the
vertical position. If it appears capable of going beyond vertical, remove a shim and
recheck it.
13. The base clevis shims control the raised position of the bridge. Adding shims
pushes it away from the cylinders. Removing the shims pulls it toward them.
14. Unless otherwise noted, only the rams must stop the bridge travel. Use of any
device to stop the bridge before the rams reach their full stroke can result in
bending their rods by the full hydraulic pressure being applied near the maximum
extended length.
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