JLG 660SJ Service Manual - Manual (Page 83)

SECTION 3 - CHASSIS & TURNTABLE
3120840 – JLG Lift – 3-33
4. Remove the O-ring.
5. Disassemble the taper roller bearing.
6. Remove the adjustment shim.
7. Unscrew the cap nut and remove it.
8. Loosen the retaining nut of the stopper max flow and
remove it.
9. Turn in the stopper max flow to get swivel angle
zero.
10. Disassemble the rotary group in horizontal position.
11. Disassemble the stopper - max. flow.