DESCRIPTION
FUNCTION OF VALVES AND SWITCHES
RELIEF VALVE
PROTECT HYDRAULIC EQUIPMENT IF WORK PLATFORM IS OVERLOADED.
BOOM
ELEVATION
HOLDING VALVE
PREVENT BOOM DECENT IF HOSE IS BROKEN OR DAMAGED.
BOOM
EXTENSION
DOUBLE
HOLDING VALVE
PREVENT BOOM RETRACTION IF HOSE IS BROKEN OR DAMAGED.
PLATFORM
LEVELING
DEVICE
KEEPS PLATFORM LEVELED
OPERATION
WARNING
DEVICE
ALARM SOUNDS WHEN ANY FUNCTION ON THE WORK PLATFORM IS BEING OPERATED.
.
FOOT SWITCH
INTERRUPTS ALL FUNCTIONS OPERATED FROM THE PLATFORM CONTROLS. MUST BE
DEPRESSED WITH FOOT BEFORE ANY PLATFORM CONTROL WILL WORK.
STOP BUTTON
STOPS ALL OPERATING FUNCTIONS IN THE BASKET WHEN DEPRESSED.
SLOPE WARNING
DEVICE
WHEN THE WORK PLATFORM REACHES A 3° ANGLE, A WARNING ALARM SOUNDS WARN-
ING THE OPERATOR.
EMERGENCY
PUMP
AUXILIARY D. C. PUMP/MOTOR ASSEMBLY CAN BE USED IN THE EVENT OF MAIN PUMP OR
ENGINE FAILURE.
WARNING HORN
HORN USED TO WARN PEOPLE IN WORK AREA.
FOOT SWITCH
INTERLOCK
WHEN FOOT SWITCH IS DEPRESSED, PLATFORM CONTROLS CAN BE OPERATED AND BASE
CONTROLS CAN'T BE USED UNTIL FOOT IS REMOVED FROM FOOT SWITCH.
TRAVEL SPEED
CONTROL
BOOM MUST BE LOWERED BELOW HORIZONTAL AND FULLY RETRACTED TO ACHIVE
HIGH SPEED.
PLATFORM OPERATiNG CONTROLS (c on ti n u ed )
7,
RIGHT TRACK CONTROL - Pushing forward will cause the right track to go forward. Pulling it back will
causethe right track to go in reverse.
8.
BOOM ELEVATION/LOWERING CONTROL LEVER SWITCH - This switch is used to raise and lower the
boom.
9. BOOM ROTATION CONTROL LEVER - This switch is used to rotate the boorn left or right.
10. BOOM EXTENSION/RETRACTION LEVER - This lever is used to extend or retract the boom.
11. PLATFORM ROTATION SWITCH - This switch is used to rotate the platform left or right.
12. EMERGENCY STOP SWITCH - This switch is used to cut power to all controls on the work platform.
13. EMERGENCY PUMP SWITCH - This switch operates a DC power unit so the boom can be brought
down if the engine or main pump fails.
14. HORN ALARM BUTTON - This button sounds a horn on the work platform.
15. W ORK LIGHT SW ITCH - This switch operates the work light located on the platform railing.
16. PLATFORM LEVEL SW ITCH - This switch enables the operator to level the platform if adjustment is
necessary.
SAFETY DEVICES
Table 2. Safety Devices
1 5
