Disassembly - JLG 600SJ Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Disassembly

NOTE: Removal of the endcap voids warranty.
During assembly, coat all moving parts with a film of
clean hydraulic oil. This assures that these parts will
be lubricated during start-up.
Replace all O-Rings and gaskets.
It is recommended that all O-rings be replaced.
Lightly lubricate all O-rings with clean petroleum jelly
prior to assembly.
5
7
13
3
12
10
8
4
1
1. Plug 5. O-ring
2. Plug 6. O-ring
3. Plug 7. Spring
4. O-ring 8. Spring
Figure 3-19. Loop Flushing Spool
1. Using a 11/16 in wrench remove plug (1) and (2).
2. Using a 5/8 in hex wrench remove plug (3).
3. Remove O-rings (4, 5, and 6).
4. Using pliers, remove centering springs (7, 8, and 9).
5. Remove spring retaining washers (10 and 11).
6. Remove shift spool (12).
7. Remove orifice poppet (13).
3-22
6
9
11
9. Spring 12. Shift Spool
10. Washer 13. Orifice Poppet
11. Washer
19
2
20
14. Lock Nut
15. O-ring Plug
16. Control Line Plug
17. Control Line Plug
Figure 3-20. Plugs, Fittings, and Speed Sen-
8. Remove all fittings from the unit. Discard any O-rings
on the fittings.
9. Using an 11/16 inch hex wrench, loosen the speed
sensor lock nut (14) if equipped. Then remove the
speed sensor using a Vi inch hex wrench. Units with-
out speed sensor have an O-ring plug (15) installed
in that location; remove it with a Va inch internal hex
wrench.
10. Using a 1/4 inch internal hex wrench, remove control
line plugs (16, 17). Discard O-rings. Using a 3 mm
hex wrench, remove cavity plug (18, if equipped with
two-line control) from X2 cavity.
11. Using a 5/16 inch internal hex wrench, remove drain
plugs (19, 20). Discard O-rings.
12. Using a 9/16 inch internal hex wrench, remove work
port plugs (21, if equipped with axial ports). Discard
O-rings.
– JLG Lift –
17
15
16
18. Cavity Plug
19. Drain Plug
20. Drain Plug
21. Work Port Plug
sor
14
21
18
16
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