JLG 600SC_660SJC Service Manual User Manual
Page 129
SECTION 4 - BOOM & PLATFORM
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– JLG Lift –
4-27
6.
Install inner T-seal (200) in piston (3) using a circular
motion. Install outer T-seal (202) by stretching it around
the groove in a circular motion. Each T-seal has two
back-up rings (see drawing for orientation).
7.
Beginning with inner seal (200) insert one end of b/u
ring in lower groove and feed the rest in using a circular
motion. Make sure wedged ends overlap correctly.
Repeat for outer seal (202).
8.
Insert piston (3) in housing (1) as shown, until outer pis-
ton seal (202) touches inside housing bore.
9.
Looking from angle shown, rotate piston (3) until marks
you put on piston and housing (1) during disassembly
line up as shown. Using a rubber mallet, tap piston in
housing to point where gear teeth meet.