JLG 510AJ Service Manual - Manual (Page 217)

SECTION 4 - BOOM AND PLATFORM
3121181 – JLG Lift – 4-19
9. Looking from opposite end of housing (1) you can see if
timing marks line up. When they do, tap piston (3) in
until gear teeth mesh together. Tap piston in housing
until it bottoms out.
10. Install shaft (2) in piston (3). Dol not damage seals. Do
not engage piston gear teeth yet.
11. Looking from view shown, use existing timing marks to
line up gear teeth on shaft (2) with gear teeth on inside
of piston (3). Tap flange end of shaft with a rubber mallet
until gear teeth engage.
12. Install two bolts in threaded holes of flange. Using a bar,
rotate shaft clockwise until wear guides are seated in
housing bore.
13. Install stop tube on shaft end. Stop tube is an available
option to limit rotation of an actuator.