CONTROLS, GAGES AND INDICATORS.
The paragraphs to follow identify the controls, gages and indicators in the Superstructure Cab. Also, the
paragraphs specify the purpose of each control, indicator, and gage. The index numbers on the
illustrations correspond to the numbers in the paragraphs.
Swing Control Lever. Allows the boom to rotate 360° in either direction. Lever movement forward
causes the boom rotation to the right, and lever movement rearward causes boom rotation to the left.
Swing Warning Horn. Used to warn personnel that boom is swinging.
Swing Control Treadle. Is attached to the Swing Control Lever. Thetreadle provides the operator
with foot control during swinging operations.
Fly Telescope Control Lever. Controls extension of the fly section. Lever movement forward extends
the fly section. Lever movement rearward retracts the fly section.
Swing Brake Pedal. The swing brake pedal stops boom swing. When the brake pedal is depressed,
hydraulic pressure is applied to the swing box brakes. Thus boom swing is stopped in a smooth
Mid Telescope Control Lever. Controls extension of the mid section. Lever movement forward
extends the mid section. Lever movement rear- ward retracts the mid-section.
Boom Elevation Control Lever. The lever controls boom elevation. Lever movement forward
elevates the boom. Lever movement rearward lowers the boom.
Boom Elevation Control Pedal. The pedal is attached to the Boom Control Lever.
operator can control boom elevation with his foot.