JLG 1230ES Service Manual - Manual (Page 114)

SECTION 6 - MAST COMPONENTS
6-14 – JLG Lift – 3121222
Figure 6-16. 1230ES Lift Cylinder Internal Components - Lower End
1. Extend Port (a)
2. Return Port
3. Proportional Lift Selenoid (b)
4. Valve Port Block (c)
5. O-Ring Seal
6. Cyl. #1 - Rod Wiper Seal
7. Cyl. #1 - Gland (d)
8. Cyl. #1 - Main Seal
9. Cyl. #1 - Gland Wire Retaining Ring
10. Cyl. #1 - O-Ring Seal
11. Cylinder Joint
12. Cyl. #2 and #3 - End Attach Cap (c, d)
13. Cyl. #2 - Cap O-Ring Seal
14. Cyl. #2 - Joint O-Ring Seals
15. Cyl. #2 - Rod Wiper Seal
16. Cyl. #2 - Gland (d)
17. Cyl. #2 - Main Seal
18. Cyl. #2 - Gland Wire Retaining Ring
19. Cyl. #2 - O-Ring
20. Cyl. #3 - Barrel End Cap (e)
21. Cyl. #3 - Piston Retaining Ring
22. Cyl. #3 - Piston
23. Cyl. #3 - Piston Damping Spring
24. Cyl. #3 - Piston Guide Ring
Note: (a) Small orifice rated at 4 GPM (115 Liters/minute).
(b) The proportional selenoid coil has a 28 ohm rating.
(c) Apply Loctite #242 to the threads of the cylinder rod on final assembly to the valve port block. Torque to 45 ft. lb. (200 Nm).
(d) Removeable.
(e) Fixed Non-Removeable - Welded to cylinder barrel.