JLG 510AJ Service Manual - Manual (Page 211)

SECTION 4 - BOOM AND PLATFORM
3121181 – JLG Lift – 4-13
7. Remove stop tube if included. Stop tube is an available
option to limit rotation of the actuator.
8. Every actuator has timing marks for proper engage-
ment.
9. Before removing shaft, (2), use a felt marker to clearly
indicate timing marks between shaft and piston. This
will greatly simplify timing during assembly.
10. Remove shaft (2). It may be necessary to strike the
threaded end of shaft with a rubber mallet.