Operator`s manual

After adjusting pilot pressure, adjust the main hydraulic pressure. Remove the cap nut on the adjusting
screw (see Figure 8-2, number 5) and loosen the lock nut. Turn the adjusting screw clockwise as far as it
will go until it is difficult to turn. Tighten the lock nut and install the cap nut. Push down on the Ladder
Elevation Auxiliary Control Lever (see Figure 8-2, number 6) to raise the end of the ladder above the lights
on the cab roof. Rotate the ladder either left or right using the Ladder Rotation Auxiliary Control Lever
(see Figure 8-2, number 4) .
Rotate the ladder far enough that the ladder can later be lowered below the horizontal position to fully
retract the Ladder Elevating Cylinders. Do not lower the ladder below the horizontal position at this time.
Loosen the lock nut and turn the relief valve screw (see Figure 8-1, number 2) counterclockwise about two
full turns. Pull up the green Throttle Control Button. Pull up the Ladder Elevation Auxiliary Control Lever
to lower the ladder below the horizontal and fully retract the Ladder Elevating Cylinders. Hydraulic
pressure will increase once the Ladder Elevating Cylinders are fully retracted. With assistance, continue
to pull up on the Ladder Elevation Auxiliary Control Lever and slowly turn the relief valve screw (see Figure
8-1, number 2) until the Hydraulic Pressure Gauge on the Ladder Control Console indicates 1550 psi.
Tighten the lock nut on the screw.
8.5 EXTENSION AND RETRACTION - RELIEF VALVE ADJUSTMENT
Elevate the ladder to 30 degrees and extend the ladder about 40 feet. Remove the cap nut and loosen
the lock nut on the adjusting screw (see Figure 8-2, number 1). Turn the adjusting screw
counterclockwise about two full turns. Pull up the green Throttle Control Button. Push down the Ladder
Extension Auxiliary Control Lever (see Figure 8-2, number 2) and fully retract the ladder. When fully
retracted the second Ladder Section should be against the mechanical retraction stops.
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