JLG G12-55A Operator Manual - Manual (Page 44)

Section 3 - Controls and Indicators
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Dash Controls and Indicators
1. Transmission Temperature Indicator: Illuminates red when transmission
temperature is too high. Immediately bring machine to a stop, retract and lower
boom and stop the engine. Determine cause and correct before continued use.
2. Engine Pre-Heat Indicator: Illuminates yellow with ignition key in the “RUN”
position. Indicator goes out when start temperature is reached.
3. Steer Select Switch: Three positions: 4-wheel circle steer, 4-wheel crab steer
and 2-wheel steer. See page 3-16 for details.
4. Park Brake Switch: See page 3-7 for details.
5. Horn Button: Depress button to sound horn.
6. Auxiliary Electrics Switches (if equipped): Enables functions of attachments that
require auxiliary electrics. See Section 5 - Attachments for approved
attachments and control instructions.
7. Quick Switch Switch (if equipped): Use in conjunction with the auxiliary
hydraulic joystick to hydraulically lock or unlock an attachment. See “Hydraulic
Quick Switch” on page 5-11.
8. Engine Warning Indicator: Illuminates red when the engine is a critical state.
Immediately bring machine to a stop, retract and lower boom and stop the
engine. Determine cause and correct before continued use. Engine may derate.
9. Check Engine Indicator: Illuminates orange when maintenance is required. See
Service Manual for details.
10. 3-in-1 Gauge and Display:
a. Engine Coolant Temperature Gauge
b. Engine Oil Pressure Gauge
c. Fuel Gauge
d. Display - Displays engine operating hours, battery voltage and engine
rpm. Engine fault codes displayed when detected. See Service Manual
for details.
OY3190
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