JLG 1230ES Service Manual - Manual (Page 43)

SECTION 4 - BASE COMPONENTS
3121222 – JLG Lift – 4-7
Steer Cylinder Disassembly
DISASSEMBLY OF THE CYLINDER SHOULD BE PERFORMED ON
A CLEAN WORK SURFACE IN A DIRT FREE WORK AREA.
PROTECT THE CYLINDER ROD SURFACE. DAMAGE TO THE CYL-
INDER ROD CHROME FINISH DUE TO SCRATCHING, INDENDA-
TION, CHIPPING OR OTHERWISE WILL CAUSE EVENTUAL
G L A N D S E A L F A I L U R E . T H E C Y L I N D E R R O D M U S T B E
REPLACED IF DAMAGED.
1. Using the proper size spanner wrench (48mm - 1.89"
Dia., 5mm Pin Dia.), remove the cylinder head
(gland) turning the head counterclockwise until it is
free of the cylinder barrel.
2. Carefully slide the complete cylinder rod, cylinder
head (gland), piston assembly out of the cylinder
barrel.
1. Remove the piston (kban) seal from the piston.
2. Loosen and remove the piston set screw from the
hole in the side of the piston.
3. Using the proper spanner wrench, remove the pis-
ton from the cylinder rod.
4. Slide the cylinder head (gland) off the piston end of
the cylinder rod.
5. Remove all the seals, o’rings, and backing ring from
the cylinder head (gland).
6. If replacing, remove the bushings from the end of
the cylinder rod and the cylinder barrel.
Cylinder Head (Gland) - Removal
1. Cylinder Head (Gland) 2. Spanner Wrench
(48mm - 1.89" Dia. - 5mm
Pin Dia.)
Piston - Removal
1. Piston (Kban) Seal
2. Piston Set Screw 3. Piston
4. Spanner Wrench