Disassembly; Inspection - JLG TOUCAN 8E Service And Maintenance Manual

SECTION 7 - HYDRAULICS
Figure 7-19. Jib Cylinder
1. Barrel
2. Rod
3. Gland
4. Rod Guide
5. Rod Seal
6. Guide Band
7. O-Ring
8. O-Ring + Back-up Ring
9. Wiper Seal
10. Bushing
Figure 7-20. Mast Cylinder
1. Barrel
2. Rod
3. Gland
4. Rod Guide
5. Rod Seal
6. Guide Band
7. Snap Ring
8. O-Ring + Back-up Ring
9. Wiper Seal
7-10

Disassembly

NEVER USE COMPRESSED AIR TO EXTRACT THE ROD FROM
THE BARREL OR TO CYCLE THE CYLINDER.
DISASSEMBLY OF A CYLINDER SHOULD BE PERFORMED ON A
CLEAN WORK SURFACE IN A DIRT FREE WORK AREA.
IF USING A VISE TO HOLD CYLINDER BARREL, NEVER CLAMP
THE BARREL TUBE WITH THE VISE'S JAWS.
1. Drain oil from the cylinder.
2. Place the cylinder barrel into a suitable holding fix-
ture.
3. Using a appropriate tool (Pin Wrench or C-Wrench),
loosen the barrel head gland by turning it in counter-
clockwise direction.
4. Withdraw the rod assembly from the barrel taking
care not to damage the chrome surface of the
rod(s).
5. Steer cylinder only: place the rod assembly into a
suitable holding fixture.
6. Steer cylinder only: loosen the piston attachment
locknut. Remove piston parts and withdraw barrel
head gland from the rod.
Mast and Jib Cylinders: remove the rod guide (No
need for removing the snap ring from the mast cylin-
der rod). Withdraw barrel head gland from the rod.
7. Remove and discard seals, O-rings, back-up rings
and guide bands from the piston and the barrel
head gland.
8. Align discarded seals and rings in the order of disas-
sembly as reminder for new seals and rings installa-
tion.

Inspection

1. Clean all parts thoroughly with an approved clean-
ing solvent.
2. Inspect the cylinder rod for scoring, tapering, ovality
or other damage. If necessary, dress rod with
Scotch Brite or equivalent. Replace cylinder if nec-
essary.
3. Inspect threaded portion of the rod for excessive
damage. Dress threads as necessary.
4. Inspect the inner surface of the cylinder barrel tube
for scoring or other damage. Check inside diameter
for tapering or ovality. Replace cylinder if necessary.
5. Inspect threaded portion of the barrel for damage.
Dress threads as necessary.
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NOTICE
NOTICE
NOTICE
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