JLG 1500SJ Service Manual - Manual (Page 344)

SECTION 4 - BOOM & PLATFORM
4-98 – JLG Lift – 3121262
7. Install the inner T-seal (200) into the appropriate
groove in the piston (3). Use a circular motion to
ensure the seal is correctly seated in the groove.
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 Assembly
Drawing for orientation). Beginning with the inner
seal (200) insert one end of backup ring in the lower
groove and feed the rest in using a circular motion.
Make sure the wedged ends overlap correctly.
Insert the other back up ring in upper groove.
Repeat both of these steps for the outer seal (202).
8. Insert the piston (3) into the housing (1) as shown,
until the outer piston seal (202) contacts the inside
housing bore.
9. Looking into the housing bore from the shaft flange
end, rotate the piston (3) until the marks you put on
the piston and the housing (1) during disassembly
align as shown. Using a rubber mallet, tap the piston
into the housing until the gear teeth contact.