JLG 660SJ Service Manual - Manual (Page 223)

SECTION 5 - HYDRAULICS
3121298 – JLG Lift – 5-33
Steer Cylinder
DISASSEMBLY
NOTE: Refer to Figure 5-71.
CONTAMINATION MAY DAMAGE EQUIPMENT. DISASSEMBLE CYLINDER ON A
CLEAN WORK SURFACE IN A DIRT FREE WORK AREA.
1. Connect a suitable auxiliary hydraulic power source to
cylinder port block fitting.
DO NOT FULLY EXTEND CYLINDER TO THE END OF STROKE. RETRACT CYLINDER
SLIGHTLY TO AVOID TRAPPING PRESSURE.
2. Operate hydraulic power source and extend cylinder.
Shut down and disconnect power source. Adequately
support cylinder rod, if applicable.
3. Place cylinder barrel in a suitable holding fixture. Tap
around outside of cylinder head retainer with a suitable
hammer to break thread-locking compound.
Figure 5-68. Cylinder Barrel Support
4. Remove burrs and contamination from cylinder before
disassembly.
5. Unscrew Spanner Nut (13) with hook spanner.
Figure 5-69. Removing Spanner Nut
PULLING ROD OFF-CENTER CAN DAMAGE PISTON AND C YLINDER BARREL
SURFACES. USE EXTREME CARE WHEN REMOVING CYLINDER ROD AND PIS-
TON.
6. Clamp barrel securely. Apply pressure to rod pulling
device and carefully withdraw complete rod assembly
from cylinder barrel.
Figure 5-70. Cylinder Rod Support