Operator`s manual

With the Ladder on the Ladder Bed, check the wire from the Elevating Switch Assembly to the Ladder
Assembly for slackness. If the wire is slack, loosen the cap screw that secures the wire to the Ladder
Assembly and pull the wire just enough to remove all slackness. Tighten the cap screw.
Check and adjust the Elevating Limit Switch Assembly. Elevate the ladder. At 70 degrees the rate of
ladder elevation should decrease. When the ladder is fully elevated, check the angle of elevation. The
angle should be 75 degrees. If the ladder begins to slow either too soon or too late, elevate the ladder to
70 degrees and adjust the Elevating Cylinder Limit Switch Assembly. Remove the cover (see Figure 8-
10). The bottom micro switch (4) causes the rate of ladder elevation to decrease when the ladder reaches
70 degrees. Loosen the cam screw and adjust the cam (3) until it contacts the micro switch. Tighten the
cam screw. If the ladder does not stop at 75 degrees, adjust the Elevating Cylinder Limit Switch
Assembly. Elevate the ladder to 75 degrees. The top micro switch (1) stops ladder elevation. Loosen the
cam screw and adjust the cam (2) until it contacts the micro switch. Tighten the cam screw. Lower and
raise the ladder to its maximum elevation after adjusting the cams and check the angle of elevation at
which the ladder begins to slow and the angle at which the ladder stops. Install the cover.
8.10.3 Calibrating The Indicator Dials
The Indicator Dials should not be calibrated before the Limit Switches have been correctly set.
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