Operator`s manual

With the Locking Pawl Assembly engaged, i.e., the Operating Lever pulled up, the Locking Pawls are
protruding through the rails of the ladder section above, ready to engage in the rungs of that section as
soon as retraction is executed at the Ladder Control Console. The ladder sections will retract until the
Locking Pawls engage in ladder rungs. This will transfer the weight of the ladder from the extension cable
to the Locking Pawl Assemblies which, in turn, will reduce the hydraulic pressure applied to the hydraulic
winch motor. This will cause a hydraulic relief valve to operate and prevent the hydraulic system from
operating against the Locking Pawls by attempting further retraction.
4.4 LADDER MAINTENANCE INSTRUCTIONS
4.4.1 General
To maintain the ladder in good order, the following procedures should be carefully followed.
After each use, the ladder must be thoroughly cleaned and greased. The outriggers must be treated with
care, and checked constantly. The general condition and functioning of the ladder should be checked at
least once a year. All screws, nuts and bolts throughout should be inspected, and tightened, if necessary.
Unpainted parts, such as the ladder slides, require frequent cleaning and greasing. Painted surfaces
should be kept in good condition, since the ladder’s service life depends upon this. Damaged paint should
be touched up at once.
If any of the cable strands are broken or frayed the cable must be replaced.
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