JLG 100SX Operator's And Safety Manual page 62

SECTION 4 - MACHINE OPERATION
NOTE: If no function is selected and the power is still on, the
jack will automatically retract after a period of 7 sec-
onds.
9. Push and hold the Jack/Steer/Axle Select switch in
the Jack position..
10. Position the Front Steer/Jacks/Axle switch to the
Retract Jack position until the jack is fully retracted.
11. Repeat steps 1 thru 10 for the opposite axle.
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