JLG 510AJ Service Manual - Manual (Page 216)

SECTION 4 - BOOM AND PLATFORM
4-18 – JLG Lift – 3121181
Each T-seal has two back-up rings (see drawing for ori-
entation).
Beginning with inner seal (200) insert one end of backup
ring in lower groove and feed the rest in using a circular
motion. Make sure wedged ends overlap correctly.
Repeat step for outer seal (202).
7. Insert piston (3) in housing (1) as shown, until outer pis-
ton seal (202) is touching inside housing bore.
8. Looking from angle shown, rotate piston (3) until marks
on piston and housing (1) made during disassembly line
up as shown. Using a rubber mallet, tap piston into
housing up to the point where gear teeth meet.