2 cylinder repair, Disassembly, Cylinder repair -3 – JLG 1350SJP Service Manual User Manual
Page 327: Disassembly -3, Cylinder barrel support -3, Cap screw removal -3
SECTION 5 - HYDRAULICS
3121142
– JLG Lift –
5-3
5.2
CYLINDER REPAIR
NOTE:
The following are general procedures that apply to all of
the cylinders on this machine. Procedures that apply to a
specific cylinder will be so noted.
Disassembly
DISASSEMBLY OF THE CYLINDER SHOULD BE PERFORMED ON A CLEAN WORK
SURFACE IN A DIRT FREE WORK AREA.
1.
Connect a suitable auxiliary hydraulic power source to
the cylinder port block fitting.
DO NOT FULLY EXTEND CYLINDER TO THE END OF STROKE. RETRACT CYLINDER
SLIGHTLY TO AVOID TRAPPING PRESSURE.
2.
Operate the hydraulic power source and extend the cyl-
inder. Shut down and disconnect the power source.
Adequately support the cylinder rod, if applicable.
3.
If applicable, remove the cartridge-type holding valve
and fittings from the cylinder port block. Discard o-
rings.
4.
Place the cylinder barrel into a suitable holding fixture.
5.
Mark cylinder head and barrel with a center punch for
easy realignment. Using an allen wrench, loosen the
eight (8) cylinder head retainer cap screws, and remove
cap screws from cylinder barrel.
6.
Attach a suitable pulling device to the cylinder rod port
block end or cylinder rod end, as applicable.
Figure 5-1. Cylinder Barrel Support
Figure 5-2. Cap Screw Removal