JLG 4394RT Service Manual - Manual (Page 54)

SECTION 3 - CHASSIS, PLATFORM & SCISSOR ARMS
3-18 – JLG Lift – 3121249
11. Disassemble rotary group completely with cradle.
12. Disassemble control piston with spring.
13. Pull out swivel balls.
14. Disassemble shaft seal ring.
15. Insert disc. Pull off bearing ring with device.
Remove disc.
16. Disassemble bearing ring from port plate.