Steer Cylinder - JLG 1850SJ Service And Maintenance Manual

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Table of Contents

Steer Cylinder

Refer to Figure 5-95.

CCONTAMINATION 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 fitting.

DO NOT FULLY EXTEND CYLINDER TO THE END OF STROKE.

RETRACT CYLINDER SLIGHTLY TO AVOID TRAPPING PRES-

2. Operate hydraulic power source and extend cylinder.

Shut down and disconnect power source.

3. Place cylinder barrel in a suitable holding fixture.

4. Remove self-tapping screw (9) from cylinder head (5)

and barrel (2).

5. Unscrew cylinder head with pin-face spanner wrench.

Figure 5-93. Cylinder Head Removal

PULLING ROD OFF-CENTER CAN DAMAGE PISTON AND CYLINDER BARREL

SURFACES. USE EXTREME CARE WHEN REMOVING CYLINDER ROD, HEAD, AND

6. Clamp barrel securely. Pull rod assembly and cylinder

head from barrel.

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS

REMOVE SEALS USING A BRASS OR PLASTIC PICK ONLY. DO NOT USE A KNIFE,

SHARP OBJECT, OR SCREW DRIVER. MAKE NOTE OF SEAL ORIENTATION

BEFORE REMOVING FOR PROPER INSTALLATION.

7. Protect cylinder rod from damage and clamp in a vise or

holding fixture as close to piston as possible.

Figure 5-94. Cylinder Rod Support

8. Remove setscrew (13) from piston (12). remove piston

from rod (21).

9. Remove and discard O-ring (11), seal (15), and wear ring

(14) from piston. Remove rod from clamp or vise.

SUPPORT TABLE