SECONDARY CONTROLS

SECONDARY CONTROLS

The secondary controls are located on the control panels beside the operator. They consist of the necessary lights, switches, and pushbuttons to support the primary controls. A fault warning buzzer, and a signal bell notify the operator of potential machine problems or get his attention. The phone set for the operator is mounted on the OIT stand behind the operator. Two pairs of jacks are located on the left side of the stand. They are wired into the Power Control Room and used to monitor the circuits for boom lowering, etc.

Left-hand Operator’s Controls

The following items are on the LEFT CONTROL PANEL

1. EARTH CONTINUITY LOCKOUT - 2-position, lockable, pushbutton used for Ground Test / Lockout.

2. WINSHIELD WIPERS, LEFT - (On, Off) A 2-position selector switch for controlling the wiper assembly on the left-front cab window.

3. WINSHIELD WIPERS, FRONT - (On, Off) A 2-position selector switch for controlling the wiper assembly on the front cab window.

4. WINSHIELD WIPERS, RIGHT - (On, Off) A 2-position selector switch for controlling the wiper assembly on the right-front cab window.

5. SHOE PARK - (Set, Release) A green illuminated pushbutton used to initiate the automatic parking function. When lit it will indicate that the walking shoes are in their PARKED position. See OPERATING WALKING MECHANISM in this section.

6. ROPE LIMIT BYPASS - A pushbutton used to back out of a final hoist, drag or tightline limit. A light will flash when in a first stage limit and be steady on a shutdown.

7. TEMPERATURE - (Cold to Hot) A rheostat used to set the desired temperature for the operator’s cab heater / air conditioner unit.

8. HVAC - (Vent, Heat, Cool, De-Mist) A 4-position selector switch used to set the heating / cooling mode for the operator’s cab heater / air conditioner unit.

9. HVAC FAN SPEED - (Off, Low, High) A 3-position selector switch used to set the fan speed for the operator’s cab heater / air conditioner unit.

10. CABIN LIGHTS - A 3-way dimmer switch used to control the interior cab lights.

The following items are located on the RIGHT CONTROL PANEL:

1. EMERGENCY STOP - A red mushroom type pushbutton that will set ALL brakes and deenergize ALL controllers on the machine when pressed.

2. MACHINE SHUTDOWN - A red flush-mounted pushbutton used to initiate machine shutdown.

3. HOIST BRAKE - A green light that indicates when the HOIST brakes are set.

Right-hand Operator’s Controls

4. DRAG BRAKE - A green light that indicates when the DRAG brakes are set.

5. SWING BRAKE - A green light that indicates when the SWING brakes are set.

6. PROPEL BRAKE - A green light that indicates when the PROPEL brakes are set.

7. DRAG MODE - A green light that indicates the machine is in DRAG mode.

8. PROPEL MODE - A green light that indicates the machine is in PROPEL mode.

9. EXCITATION STOP - A pushbutton that DE-ENERGIZES the hoist, drag and swing controllers and also the solenoid circuits.

10. HOIST BRAKE - (Set, Release) This switch sets or releases the HOIST brakes.

11. EXCITATION START / FAULT RESET - A green illuminated pushbutton that ENERGIZES the hoist, drag and swing controllers and also the solenoid circuits. It is also used to clear all faults after the problem has been solved.

12. DRAG BRAKE - (Set, Release) This switch sets or releases the DRAG brakes.

13. PROPEL TRANSFER - (Drag, Propel) A 2-position switch to transfer the machine betwen

DRAG mode and PROPEL mode.

14. SWING BRAKE - (Set, Release) This switch sets or releases the SWING brakes.

15. AIR COMPRESSOR - (Off, On) A 2-position selector switch to turn the air compressor on or off.

16. PROPEL BRAKE - (Set, Release) This switch sets or releases the PROPEL brakes.

17. SEAT CONSOLE POSITION - (Left to Right) A selector switch used to adjust the left-to-right position of the operator’s seat.

NOTE: The motion brakes are HOLDING BRAKES ONLY and are not intended to retard or stop any drive motion EXCEPT in an emergency situation. See Plugging the Motion. Always bring any drive motion to a halt before applying these brakes.