JLG 400S Service And Maintenance Manual page 319

6. Install the O-ring (204) and back-up ring (207) into the
inner seal groove on the end cap (4).
7. Install the inner T-seal (200) into the piston (3) using a
circular motion.
Install the outer T-seal (202) by stretching it around the
groove in a circular motion.
Each T-seal has 2 back-up rings (see drawing for orienta-
tion).
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SECTION 4 - BOOM & PLATFORM
8. Beginning with the inner seal (200) insert one end of b/u
ring in the lower groove and feed the rest in using a cir-
cular motion. Make sure the wedged ends overlap cor-
rectly.
Repeat this step for the outer seal (202).
9. Insert the piston (3) into the housing (1) as shown, until
the outer piston seal (202) is touching inside the hous-
ing bore.
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