JLG 660SJ ANSI Service Manual - Manual (Page 86)

SECTION 3 - CHASSIS & TURNTABLE
3-32 – JLG Lift – 3120718
2. Mark the position of the port plate and remove the
socket screw from the port plate.
3. Remove the port plate together with the valve plate
(hold the valve plate so that the plate can’t fall
down).
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.