SECTION 3 OPERATING CONTROLS AND INSTRUMENTS
3-6 DD-29/31HF/38HF Vibratory Asphalt Compactors
Indicator Lights
The indicator lights (7) consist of two separate lights. A battery condition light and a check
engine light. The battery condition light turns ON when there is a problem with the battery. The
Check Engine Light turns ON whenever the ignition key is turned to the ON position to indicate
that the system is operating correctly. The light will also turn ON if the engine has low oil
pressure or high engine coolant temperature. If the Check Engine Light comes on during
machine operation, shutdown the engine immediately and have service personnel determine
the cause of the fault.
Brake Test Switch
The Brake Test Switch (8) is a momentary switch that allows the operator to test the operation
of the Park Brake.
Park Brake Switch
This switch (9) turns the park brake ON and OFF.
Horn
Press the horn button (10) to sound the horn and alert personnel to the approaching machine
or when changing direction.
Ignition Switch
This four-position switch (11) controls glow plug warm up engine starting, running, and
stopping.
Water Flow Control
This Water Control lever (12) allows the operator regulate the amount of water that is supplied
to the drums.
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