JLG 642 Operation & Safety Manual page 51

4. Left Turn (if equipped): Illuminates and flashes when left turn signal or hazard lights
are active.
5. Low Engine Oil Pressure: Illuminates when oil pressure is low.
6. Low Fuel Level: Illuminates when fuel level is low.
7. System Distress: Illuminates when critical machine and engine faults exist.
8. Right Turn (if equipped): Illuminates and flashes when right turn signal or hazard
lights are active.
9. Park Brake: Illuminates when park brake is applied. See page 3-11.
10. High Beam (if equipped): Illuminates when high beam lights are active.
11. High Exhaust System Temperature (HEST) (if equipped): May illuminate during
exhaust system cleaning. See page 4-6.
12. Rear Axle Stabilization (RAS): Illuminates when rear axle stabilization is active. See
page 3-32.
13. Engine Preheat: Illuminates with ignition key in position 1. Indicator goes out when
start temperature is reached.
14. Selective Catalytic Reduction (SCR) (if equipped): Illuminates when stationary
cleaning is required. Flashes during cleaning process. See page 4-6 for details.
15. Low Diesel Emission Fluid (DEF) (if equipped for ULS): Illuminates when DEF is low.
16. High Engine Temperature: Illuminates when engine temperature is high.
17. Engine Fault Critical: Illuminates when critical engine fault exists.
18. Engine Fault Warning: Illuminates when engine is operating outside normal range.
19. High Hydraulic Oil Temperature: Illuminates when hydraulic oil temperature is high.
20. Engine Oil Pressure Gauge: Indicates engine oil pressure.
21. Engine Coolant Temperature Gauge: Indicates engine coolant temperature.
22. Engine Speed: Indicates engine speed in revolutions per minute (rpm).
23. Fuel Level Gauge: Indicates fuel level.
24. Diesel Emission Fluid (DEF) Level Gauge (if equipped for ULS): Indicates fluid level.
25. LCD Display: See page 3-6.
26. Left Control Button Press to decrease display brightness. Increases digits in anti theft
function. See page 3-24.
27. Right Control Button Press to increase display brightness. Confirms digits in
anti theft function. See page 3-24.
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Section 3—Controls and Indicators
3-5