SECTION 4 - HYDRAULICS
4-4 – JLG Lift – 3121642
4. Place the cylinder barrel into a suitable holding fixture.
.
NOTE: Steps 6 and 7 apply only to the steer cylinder.
5. Using a spanner wrench, loosen the spanner nut
retainer, and remove spanner nut from cylinder barrel.
6. Being careful not to mar the surface of the rod, use a
punch or wooden dowel and hammer to drive the rod
guide about one inch down into the cylinder bore.
Using a screw driver, carefully push one end of the
round retaining ring back towards the inside of the cyl-
inder and then slip the screwdriver tip under that end.
Pull the ring out of the groove toward the wall mouth.
Once one end of the retaining ring is free from the
groove, the remainder can be easily pried free using
ones fingers or pliers.
7. Attach a suitable pulling device to the cylinder rod port
block end or cylinder rod end, as applicable.
EXTREME CARE SHOULD BE TAKEN WHEN REMOVING THE CYLINDER ROD,
HEAD, AND PISTON. AVOID PULLING THE ROD OFF-CENTER, WHICH COULD
CAUSE DAMAGE TO THE PISTON AND CYLINDER BARREL SURFACES.
8. With the barrel securely clamped, apply pressure to the
rod pulling device and carefully withdraw the complete
rod assembly from the cylinder barrel.
9. Using suitable protection, clamp the cylinder rod in a
vise or similar holding fixture as close to the piston as
possible.
NOTE: Step 11 applies only to the steer cylinder.
10. Loosen and remove the nut which attaches the piston to
the rod, and remove the piston.
11. Loosen and remove the cap screw(s), if applicable,
which attach the tapered bushing to the piston.
12. Insert the cap screw(s) in the threaded holes in the outer
piece of the tapered bushing. Progressively tighten the
cap screw(s) until the bushing is loose on the piston.
Figure 4-2. Cylinder Barrel Support
Figure 4-3. Lift Cylinder Cap Screw Removal
Figure 4-4. Cylinder Rod Support
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