JLG 450A_AJ Series II Service Manual - Manual (Page 281)

SECTION 5 - HYDRAULICS
3121290 – JLG Lift – 5-41
14. Remove cylinder rod from holding fixture.
15. Position cylinder barrel in suitable holding fixture.
INSERTING ROD OFF-CENTER CAN DAMAGE PISTON AND CYLINDER BARREL SURFACES.
USE EXTREME CARE WHEN INSTALLING CYLINDER ROD, HEAD, AND PISTON.
16. Clamp barrel securely and support rod. Insert piston end
into barrel cylinder. Do not damage or dislodge piston
O-rings and backup ring.
17. Continue pushing rod into barrel. Screw in cylinder
head. Torque to 368 ft-lb (500 Nm).
Figure 5-81. Cylinder Head Installation
NOTE: Marks made during disassembly should line up.