JLG 4017PS Operator Manual - Manual (Page 181)

Section 8 - Additional Checks
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8.4 AUXILIARY POWER (IF EQUIPPED FOR PLATFORM)
A. Auxiliary Power System Test
The auxiliary power system is available in case of an emergency or engine failure.
To check this feature, perform the following:
1. Test system with machine on a level surface and no load.
2. Lower attachment to ground and shut-off engine.
3. Verify the power/emergency stop switch is not depressed and the ignition switch
is in position I.
4. Depress auxiliary power switch and hold in place to engage auxiliary power
system.
5. While holding auxiliary power switch operate each boom joystick function briefly
to ensure proper operation
6. Release auxiliary power switch, turn ignition switch to position 0 and depress
the power/emergency stop switch.
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