JLG 510AJ Service Manual - Manual (Page 274)

SECTION 5 - HYDRAULICS AND HYDRAULIC SCHEMATICS
5-54 – JLG Lift – 3121181
1. Check Valve
2. Load Shuttle
3. Load Shuttle
4. Main Dump
5. Swing
6. Steer 7. Upper Lift
8. Proportional Dump
9. Directional Pilot
10. Telescope
11. Lower Lift
12. Flow Regulator 13. Bang Bang Relief
14. Proportional Main Relief
15. Steer Relief
16. Load Shuttle (Steer)
17. Lift Down Relief
18. Swing Relief
Figure 5-89. Main Control Valve