Piston Seal Kit Installation - JLG E450A Service And Maintenance Manual

SECTION 5 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
12. Place new piston seal and wear rings in the outer piston
diameter groove. (A tube, with I.D. slightly larger than
the O.D. of the piston is recommended to install the
solid seal).
WEAR
RING
Figure 5-118. Piston Seal Kit Installation
13. Position the cylinder barrel in a suitable holding fixture.
5-112
PISTON
WEAR
SEAL
RING
O-RING
EXTREME CARE SHOULD BE TAKEN WHEN INSTALLING THE CYLINDER ROD,
HEAD, AND PISTON. AVOID PULLING THE ROD OFF-CENTER, WHICH COULD
CAUSE DAMAGE TO THE PISTON AND CYLINDER BARREL SURFACES.
14. With barrel clamped securely, and while adequately sup-
porting the rod, insert the piston end into the barrel cyl-
inder. Ensure that the piston loading o-ring and seal are
not damaged or dislodged.
15. Screw both the cylinder rod ends and torque to 200-250
ft lbs. (271-339 Nm).
16. Continue pushing the rod into the barrel until the cylin-
der guide gland can be inserted into the barrel cylinder.
17. Using a hook spanner, Install spanner nut into the cylin-
der barrel.
18. After the cylinder has been reassembled, the rod should
be pushed all the way in (fully retracted) prior to the re-
installation of any holding valve or valves.
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