Dual Motor Dipper Trip - General Arrangement

OPERATION

OPERATION NEAR ELECTRICAL LINES

DANGER: HIGH VOLTAGE! The following precautions shall be complied with whenever operating around or near electrical distribution and transmission lines.

Working in the vicinity of electrical power lines presents a very serious hazard and special precautions must be taken. For purposes of this manual we are considering the entire machine or its load, in any position, that can reach to within the minimum distance specified by local, state and federal regulations.

Safe operating practices require that you maintain the maximum possible distance from the lines

and never violate the minimum clearances.

Before working in the vicinity of power lines, always take the following precautions:

• Always contact the owners of the power lines or the nearest electric utility before beginning work.

• You and the electrical utility representative must jointly determine what specific precautions must be taken to insure safety. • It is the responsibility of the user and the electric utility to see that necessary precautions are taken.

• Consider all lines to be power lines and treat all power lines as energized even though it is known that the power is shut off and the line is visibly grounded. • Slow down the operating cycle. Reaction time may be too slow and distances may be misjudged. • Caution all ground personnel to stand clear of the machine at all times. • Use a signal person to guide the machine into close quarters. The sole responsibility of the signal person is to observe the approach of the machine to the power line. The signal person must be in direct communication with the operator and the operator must pay close attention to the signals.

DANGER: HIGH VOLTAGE! Death or injury could result should any part of the machine approach the minimum distance of an energized power line specified by local, state and federal regulations.

OPERATOR’S CONTROLS

The operator must become familiar with the machine and its operating controls before operating the machine.

The operating controls will be grouped as primary and secondary controls, depending upon their location. The primary controls are the controls located in the operator’s cab and the secondary controls are the controls located in the machinery house.

The descriptions listed should familiarize the operator with each control’s location and functional use. The terms left, right, forward and reverse indicate directions with the operator seated in the cab and facing forward, and with the boom extending over the front of the crawlers.

PRIMARY OPERATING CONTROLS

CONTROLS ON THE LEFT CONSOLE

LEFT MASTER SWITCH

The Left Joystick functions as the crowd/horn/dipper trip/propel master switch. It is the vertical handle mounted on the left console of the operator’s seat. The switch will spring return to neutral when released.

During normal operation, pushing the joystick forward will extend the dipper handle and dipper into the bank. Pulling the joystick rearward will retract the dipper handle and dipper toward the machine. The neutral position between the crowd and retract functions is defined by a detent that is easily felt. The rate of motion is controlled by varying the distance the joystick is moved from the neutral (center) position. Full forward or full rearward position provides maximum speed to the handle. Moving the joystick to neutral will cause a braking action slowing the crowding or retracting handle. Reversing the joystick will cause the motion to stop and if the joystick is held in this position, it will change the direction of the motion.

With the propel transfer switch in the PROPEL position, pushing the joystick forward will cause the left crawler to move forward. Pulling the joystick to the rear will cause the left crawler to move in the reverse direction. The crowd/retract motion is locked out electrically when the machine is in the propel mode.

DIPPER TRIP

The dipper trip is part of the crowd joystick function. Moving the joystick to the right will activate the dipper trip mechanism which releases the dipper door latch. The dipper trip is operational throughout the entire range of the crowd motion.

SIGNAL HORN

Moving the joystick to the left will activate the signal horn. The signal horn is operational throughout the entire movement range of the crowd motion.

Left Control Console