JLG 601S ANSI Service Manual - Manual (Page 154)

SECTION 5 - HYDRAULICS
5-6 – JLG Lift – 3120746
5. Using suitable protection, clamp the cylinder rod in
a vise or similar holding fixture as close to piston as
possible.
6. Carefully thread the piston on the cylinder rod hand
tight, ensuring that the o-ring and back-up rings are
not damaged or dislodged.
7. Thread piston onto rod until it abuts the spacer end
and install the tapered bushing.
NOTE: When installing the tapered bushing, piston and mat-
ing end of rod must be free of oil.
WHEN REBUILDING THE MASTER, SLAVE, LIFT, OR TELESCOPE
CYLINDERS, APPLY LOCTITE #242 TO TAPERED BUSHING
BOLTS, THEN TIGHTEN SECURELY. (TABLE 5-1, CYLINDER HEAD
AND TAPERED BUSHING TORQUE SPECIFICATIONS).
8. Install the bolts in tapered bushing using loctite
#242. (See Table 5-1, Cylinder Head and Tapered
Bushing Torque Specifications.)
9. Remove the cylinder rod from the holding fixture.
10. Place new guide locks and seals in the applicable
outside diameter grooves of the cylinder piston.
(See Figure 5-10., Piston Seal Kit Installation).
11. Position the cylinder barrel in a suitable holding fix-
ture.
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.
12. 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.
13. Continue pushing the rod into the barrel until the cyl-
inder head gland can be inserted into the barrel cyl-
inder.
14. Secure the cylinder head gland using the washer
ring and socket head bolts. (Table 5-1, Cylinder
Figure 5-10. Piston Seal Kit Installation
Figure 5-11. Tapered Bushing Installation