JLG 1500SJ Service Manual - Manual (Page 407)

SECTION 5 - HYDRAULICS
3121262 – JLG Lift – 5-55
13. Remove the cylinder rod from the holding fixture.
14. Place a new t-seal and wear rings in the outer piston
diameter grooves. (A tube, with I.D. slightly larger
than the O.D.of the piston is recommended to install
the seal.)
15. Position the cylinder barrel in a suitable holding fix-
ture.
EXTREME CARE SHOULD BE TAKEN WHEN INSTALLING THE CYL-
INDER ROD, HEAD, AND PISTON. AVOID PULLING THE ROD OFF-
CENTER, WHICH COULD CAUSE DAMAGE TO THE PISTON AND
CYLINDER BARREL SURFACES.
16. With barrel clamped securely, and while adequately
supporting the rod, insert the piston end into the
barrel cylinder. Ensure that the piston seals are not
damaged or dislodged.
17. Continue pushing the rod into the barrel until the cyl-
inder head gland can be inserted into the barrel cyl-
inder.
18. Secure the cylinder head gland using the washer
ring, JLG Threadlocker (P/N 0100011), and socket
head bolts. Torque to 120 ft.lbs. (163 Nm)
19. After the cylinder has been reassembled, the rod
should be pushed all the way in (fully retracted) prior
to the reinstallation of any valves.
20. Install the check valves in the rod port block.
21. Install the counterbalance valves in the rod port
block.
22. Install the relief valve in the rod port block.
Figure 5-115. Piston Seal Installation
Figure 5-116. Rod Assembly Installation