JLG 1500SJ Service Manual - Manual (Page 340)

SECTION 4 - BOOM & PLATFORM
4-94 – JLG Lift – 3121262
7. Remove the end cap (4) and carefully set aside for
later inspection.
8. Remove the stop tube (400) if the actuator is
equipped with one. The stop tube is an available
option that limits the rotation of the actuator.
9. Every actuator has two sets of small punched timing
marks that indicate timing between the gear sets.
The location and appearance of the marks can vary
slightly between models. One set indicates the tim-
ing between the piston sleeve (3) and the housing
(1) (upper photo), the second set between the pis-
ton and the shaft (lower photo). To ensure correct
rotation and accurate end positions, it is essential
that the actuator be correctly timed when it is reas-
sembled. The punched timing marks can be used,
but it is easier to highlight punched marks with a
marker before disassembly as outlined in the steps
below.
10. Prior to removing the shaft (2), use a felt marker to
clearly indicate the timing between shaft and piston
sleeve (3). This will greatly simplify timing when the
actuator is reassembled.