JLG 1230ES, Руководство по обслуживанию и ремонту

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SECTION 6 - MAST COMPONENTS
3121222 – JLG Lift – 6-15
Hydraulic Cylinder - Disassembly
The following disassembly procedures shows the com-
plete disassembly sequence of the cylinder assembly.
However, your situation may not require complete dis-
assembly, choose which procedures are required to
repair the cylinder assembly for your situation.
DISASSEMBLY OF THE CYLINDER SHOULD BE PERFORMED ON A CLEAN
WORK SURFACE IN A DIRT FREE WORK AREA.
Removing the Valve Block Assembly
PROTECT THE CYLINDER ROD SURFACE. DAMAGE TO THE CYLINDER
ROD CHROME FINISH DUE TO SCRATCHING, INDENDATION, CHIPPING
OR OTHERWISE WILL CAUSE EVENTUAL GLAND SEAL FAILURE. THE
CYLINDER ROD MUST BE REPLACED IF DAMAGED.
1. Wrap the cylinder rod to protect it from damage,
then clamp the cylinder rod into a vise or device
to keep it from turning while removing the valve
block assembly.
2. Using the proper size wrench, (approx. 55mm -
2.165"), turn the valve block assembly counter-
clockwise to remove it from the end of the cylin-
der rod.
Cylinder #2 and #3 - Removal from Stack
1. Using the proper size wrench, (44mm - 1.732")
remove cylinder #2 rod attach cap by turning the
cap counterclockwise to remove.
2. Once the attach cap is removed from cylinder #2
rod, slide the cylinder #2 and #3 assembly out of
the joint sleeve. Move the cylinder #2 and #3
assembly to a suitable workbench for disassem-
bly.
Figure 6-17. Valve Block - Removal
1. Valve Block
2. Cyl. #1 - Cylinder Rod
3. O-Ring Seal
4. Direction for Removing
5. Direction for Installing
Figure 6-18. Cylinder #2 and #3 Assembly - Removal
1. Rod Attach Cap
2. Cylinder Joint
3. Cyl. #2 and #3 Assembly