assembly (fig. 5-4), consisting of two arms, two
struts, and two eye assemblies, is attached to a
panel. Since the panel assemblies are operated in
pairs, the linkages for two panels are attached to a
single trunnion shaft that is mounted in three
bearing block assemblies. Two hydraulic cylinders
are attached to the trunnion shaft by crank
assemblies, and the shaft is rotated by the
push-and-pull operation of the hydraulic cylinders.
Shaft rotation extends or retracts the linkage to
raise or lower the panels. This configuration is
designed so that in the event that one of the
hydraulic cylinders fails, the other cylinder will raise
or lower the pair of panels.
Magnets on the operating linkage actuate the
limit switches mounted below the deck that provide
an indication of JBD position.
Water-Cooled Panel Assembly
A water-cooled panel assembly (fig. 5-5) is a
reinforced ribbed aluminum alloy panel structure
with a water manifold installed on each side. It
consists of 14 tube assemblies and 7 removable
module assemblies and is bolted on hinge and lift
fittings. The module assemblies are fastened to the
panel base assembly by screws, which permit easy
removal in the event of module failure.
module has water passages that are connected to the
inlet and discharge water manifolds by tube
Figure 5-4.Operating gear assembly.