JLG M4069 Service Manual - Manual (Page 86)

SECTION 4 - HYDRAULICS
4-14 – JLG Lift – 3121639
NOTE: Torque Locknut (8) to 400 ft lbs (542.3 Nm).
Torque Counter Balance Valve (20) and Check Valve
(21) to 30-35 ft. lb. (40-47 Nm).
When servicing, apply a light coat of grease to the
Jack Pad (2) before installing.
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1. Cylinder Barrel
2. Jack Pad
3. Special Screw, 1/2" - 13NC x 1-1/4
4. Cylinder Rod
5. Retaining Ring
6. Plate
7. End Cap
8. Locknut
9. Piston
10. Flatwasher, 1-1/4"
11. Wear Ring
12. Piston Seal
13. O-Ring
14. Head
15. Wear Ring
16. O-Ring
17. Polyseal
18. Wiper Seal
19. Plug
20. Counter Balance Valve (see note)
21. Check Valve (see note)
Figure 4-13. Leveling Jack Cylinder