JLG 680S, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
3121234 4-55
7. Remove the end cap (4) and set aside for later
inspection.
8. Remove the stop tube (400) if equipped with one. The
stop tube is an available option to limit the rotation of
the actuator.
9. Every actuator has timing marks for proper engage-
ment.
10. Prior to removing the shaft (2), use a felt marker to
clearly indicate the timing marks between shaft and pis-
ton. This will greatly simplify timing during assembly.