JLG 67SL Service Manual - Manual (Page 84)

SECTION 4 - HYDRAULICS
4-8 – JLG Lift – 3121322
9. Carefully thread the piston clock-wise on the cylin-
der rod hand tight until it abuts the spacer, ensuring
that the o-ring, snap ring, and piston seals are not
damaged or dislodged.
10. Insert the setscrews on the piston and tighten to
lock piston in place on cylinder rod.
11. Remove the cylinder rod from the holding fixture.
12. Position the cylinder barrel in a suitable holding fix-
ture.
NOTICE
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.
13. With barrel clamped securely, and while adequately
supporting the rod, insert the piston end into the
barrel cylinder. Ensure that the piston loading o-ring
and seal ring are not damaged or dislodged.
14. Continue pushing the rod into the barrel until the cyl-
inder head can be inserted into the barrel cylinder.
Piston
Spacer
Cylinder
Rod
Figure 4-18. Piston Installation
Pistons
Setscrews
Figure 4-19. Piston Setscrew Installation
Cylinder
Head
Cylinder
Rod
Piston
Cylinder
Barrel
Figure 4-20. Rod Installation