JLG 660SJ Service And Maintenance Manual page 178

SECTION 4 - BOOM & PLATFORM
10. Looking from opposite end of housing (1) when timing
marks line up, tap piston (3) in until gear teeth mesh
together. Tap piston in housing until it bottoms out.
11. Install shaft (2) in piston (3). Do not damage seals. Do
not engage piston gear teeth.
12. 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 rubber mallet
until gear teeth engage.
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13. Install 2 bolts in threaded holes in flange. Using a bar,
rotate shaft clockwise until wear guides are seated in
housing bore.
14. Install stop tube on shaft end. Stop tube is an available
option to limit actuator rotation.
15. Coat threads on end of shaft with anti-seize grease to
prevent galling.
– JLG Lift – 3121298