JLG 80SL, Service Maintenance Manual

Page: 84 / 162

SECTION 4 - HYDRAULICS
4-4 – JLG Lift – 3121325
9. Using a spanner wrench, loosen and remove the
cylinder head from the barrel.
EXTREME CARE SHOULD BE TAKEN WHEN REMOVING THE CYL-
INDER ROD, HEAD, AND PISTON. AVOID PULLING THE ROD OFF-
CENTER, WHICH COULD CAUSE DAMAGE TO THE PISTON AND
CYLINDER BARREL SURFACES.
10. With the barrel clamped securely, apply pressure to
the rod pulling device and carefully withdraw the
complete rod assembly from the cylinder barrel.
.
11. Using suitable protection, clamp the cylinder rod in
a vise or similar holding fixture as close to the piston
as possible.
12. If applicable, loosen and remove the setscrew which
attaches the piston to the rod, and remove the pis-
ton.
13. If applicable, unscrew the piston counter-clock-wise,
by hand, and remove the piston from the cylinder
rod.
Cylinder
Head
Barrel
Cylinder
Rod
Figure 4-5. Cylinder Head Removal
Figure 4-6. Cylinder Rod Support
Pistons
Setscrews
Figure 4-7. Piston Setscrew Removal
Piston
Cylinder
Rod
Figure 4-8. Piston Removal