JLG 600SJ Service And Maintenance Manual page 199

6. Remove the end cap (4) and set aside for later
inspection.
7. Remove the stop tube if included. The stop tube is
an available option to limit the rotation of the actua-
tor.
3121202
SECTION 4 - BOOM & PLATFORM
8. Every actuator has timing marks for proper engage-
ment.
9. Prior to removing the shaft, (2), use a felt marker to
clearly indicate the timing marks between shaft and
piston. This will greatly simplify timing during assem-
bly.
– JLG Lift – 4-27