JLG 600SC_660SJC Service Manual - Manual (Page 135)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
3121157 – JLG Lift – 5-43
10. Pull out plunger sub assembly (33).
NOTE: Slowly pull it out while turning it. Be careful not to
damage the circumference.
11. Loosen plug (55), and pull out spring seat (59),
spring (58), and poppet (57).
12. After removing pin (12), retainer holder (13), retainer
plate (14), and piston sub assembly (15), remove
snap ring (11) by making spring (9) flex using a jig or
press.
13. Remove collar (10), spring (9), and collar (8).
Reduction Gear Disassembly
14. Remove plugs (1-8), (1-5) and bolt (1-29). Tap the
center of cover (1-27) with plastic hammer. When
cover (1-27) starts to float up, remove cover (1-27).
15. Remove thrust plate (1-23) and drive gear (1-22).