Operator`s manual

When hydraulic pressure is applied to the cylinders they rise, causing the ladder sections to rotate at the
cradle and thus elevate the forward end of the ladder.
The three ladder sections are nested, with Section Two nested in Section One and Section Three nested
in Section Two. The ladder sections are manufactured of steel rails, separated by the ladder rungs, and
are designed to slide over one another on nylon slides.
The ladder trussing is square tubular steel welded to the main rails to provide rigidity and strength. The
ladder rungs are also square tubular steel and each has a no-slip tread.
Ladder Section One (see Figure 4-4) includes the Extension Drive Sub-assembly (9), the Ladder Support
Assembly attaching points (8), the ladder section pivot points (7), and the Stop Pawl Lever Control
mechanism (6). Two extension cable pulleys (2) and three pairs of nylon slides (1) are mounted at the
forward end of the ladder section, along with a set of Locking Pawls (3) to engage in the rungs of the
second section when the ladder is extended. For a description of the Locking Pawl Mechanism, refer to
para 4.3.
Two pulleys are mounted between rungs, located toward the forward end of Section One (4), to direct the
Retraction Cable from the top-side to the underside of Section One in order that the Retraction Cable may
be attached to the retraction winding drum on the winch.
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