JLG 1230ES Service Manual - Manual (Page 116)

SECTION 6 - MAST COMPONENTS
6-16 – JLG Lift – 3121222
Cylinder Rod Assembly - Removal from the Cylinder
Barrel
The following disassembly procedure for removing the
gland end of the cylinder is the same for cylinders 1, 2,
and 3.
1. Using pliers and small screwdriver fish the end of
wire retaining ring out of the slot on the gland end of
the cylinder barrel.
2. Place the spanner wrench pins (48mm - 1.889"
diameter) into the slots in the end of the gland.
3. Now slowly rotate the gland pulling the gland retain-
ing ring out of the slot in the side of the cylinder bar-
rel. Keep rotating gland until the hood end of the
retaining ring is aligned with the hole in the slot and
lift the retaining ring completely free of the cylinder
barrel.
4. Place a container below the end of the cylinder bar-
rel and carefully pull the gland out of the end of the
cylinder barrel. Allow any hydraulic oil to drain.
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.
5. Carefully slide the rod assembly out of the cylinder
barrel and place on a clean surface preferably a
workbench.
Piston - Removal from Cylinder Rod
1. Remove the piston retaining ring from slot in the
end of the cylinder rod.
2. Slide piston, compression spring and piston guide
ring off the end of the cylinder rod.
Figure 6-19. Cylinder Rod/Gland - Removal
1. Cylinder Barrel
2. Gland Wire Retaining Ring
3. Retaining Ring Slot/Hole 4. Cylinder Gland
5. Spanner Wrench Tool
(48mm - 1.889" Dia.)
Figure 6-20. Cylinder Rod Piston - Removal
1. Piston Retaining Ring
2. Piston
3. Compression Spring 4. Piston Guide Ring
5. Retaining Ring Slot on
Cylinder Rod