JLG 680S Service Manual - Manual (Page 201)

SECTION 4 - BOOM & PLATFORM
3121234 – JLG Lift – 4-7
Figure 4-7. Boom Assembly Cutaway - Sheet 2 of 2
1. Base Boom
2. Mid Boom
3. Fly Boom
4. Telescope Cylinder
5. Extend Sheave
6. Retract Sheave
7. Sheave Block
8. Extend Cable 9. Retract Cable
10. Extend Cable Adjustment
11. Retract Cable Adjustment
12. Proximity Switch
13. Wear Pad
14. Shims
15. Wear Pad