JLG 800S Service Manual - Manual (Page 226)

SECTION 4 - BOOM & PLATFORM
4-10 – JLG Lift – 3121139
Figure 4-9. Proximity Switch Adjustment
NOTE: To avoid damaging the proximity switch, install and adjust the switch AFTER
assembling the switch block and compression spring, and after torquing the
wire ropes.
To adjust the proximity switch, thread the switch all the way in and back out
1/8 to 1/2 a turn.