Section 8-Additional Checks; General; Reverse Sensor System (If Equipped) - JLG 642 Operation & Safety Manual

SECTION 8—ADDITIONAL CHECKS
8.1

GENERAL

If any of the following test results cannot be achieved, the system is not functioning
properly and the machine must be removed from service and repaired before
continued operation.
8.2

REVERSE SENSOR SYSTEM (IF EQUIPPED)

A. Reverse Sensor System Check
Reverse Sensor System provides audible indication of objects to rear of unit while in
reverse gear.
1. Clear all people and/or obstacles behind machine before performing Reverse
Sensing System check.
2. Start machine and depress and hold brake. Place machine in reverse gear.
3. Verify alarm sounds upon system start up.
Note: Reverse Sensing System detects objects of size more than 36 square inches
(232.25 square centimeters) area and is functional when machine is moving in reverse
direction.
Note: The use of a construction cone or similar object must be used to test the Reverse Sensing
System.
CRUSH HAZARD. Do not use a person to test the reverse sensing system.
4. Verify operation with no objects in detection zone. No audible alarm.
5. Verify operation when object is in range of approximately 9 to 15 ft (2.7 to 4.5 m).
Produces pulsing audible alarm at a frequency of one per second (1 Hz).
6. Verify operation when object is in range of approximately 7 to 9 ft (2.1 to 2.7 m).
Produces pulsing audible alarm. Produces pulsing audible alarm at a frequency of
two per second (2 Hz).
7. Verify operation when object is range of approximately 5 to 7 ft (1.5 to 2.1 m)
Produces pulsing audible alarm at a frequency of four per second (4 Hz).
8. Verify operation when object is under approximately 5 ft (1.5 m) from machine.
Produces pulsing audible alarm at a frequency of eight per second (8 Hz).
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Section 8—Additional Checks
WARNING
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8-1