JLG G6-23A Operator Manual - Manual (Page 53)

Section 3 - Controls and Indicators
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3.4 OPERATOR SEAT
Adjustments
Prior to starting the engine adjust seat for position and comfort as follows:
1. Turn the knob to adjust suspension to the appropriate weight setting.
2. Use knob to adjust backrest angle.
3. Always fasten seat belt during operation.
4. Lift handle to move seat fore and aft.
5. Lift latch to adjust cushion angle.