Rear Axle Stabilization (Ras) System; Free Pivot Mode; Slow Pivot Mode; Locked Mode - JLG 642 Operation & Safety Manual

Section 3—Controls and Indicators
3.9

REAR AXLE STABILIZATION (RAS) SYSTEM

3
1

Free Pivot Mode

With boom below 40° (1), RAS system is in Free Pivot Mode. Rear axle pivots freely and frame
level functions normally. RAS indicator (2) will be off.

Slow Pivot Mode

With boom above 40° (3), the RAS system is in Slow Pivot Mode when service brake is not
applied and transmission is in gear. Rear axle will respond slowly to changes in terrain and
frame level functions normally. RAS indicator (2) will be off.

Locked Mode

With boom above 40° (3), and activating one or more of following functions, RAS system is in
Locked Mode.
• Park brake switch engaged
• Transmission control lever in Neutral
• Service brake pedal depressed
Rear axle is locked and the frame level functions slower than normal. The RAS indicator (2)
will illuminate.
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OD1420
RAS
2
OD1430
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