Disassembly - JLG 600AJ Service And Maintenance Manual

Disassembly

NOTE: Removal of endcap voids warranty.

Coat all moving parts with a film of clean hydraulic oil dur-
ing assembly. This ensures parts will be lubricated during

start-up.

Replace all O-Rings and gaskets.

It is recommended to replace all O-rings. Lightly lubricate
O-rings with clean petroleum jelly before 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 3-28. 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).
31215031


6
9
11
9. Spring 12. Shift Spool
10. Washer 13. Orifice Poppet
11. Washer
17
19
2
20
14. Lock Nut
15. O-ring Plug
16. Control Line Plug
17. Control Line Plug
Figure 3-29. Plugs, Fittings, and Speed Sensor
8. Remove all fittings from unit. Discard any O-rings on fit-
tings.
9. Using an 11/16 inch hex wrench, loosen speed sensor
lock nut (14) if equipped. Remove speed sensor using a
Vi inch hex wrench. Units without 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.
SECTION 3 - CHASSIS & TURNTABLE
15
16
18. Cavity Plug
19. Drain Plug
20. Drain Plug
21. Work Port Plug
14
21
18
16
3-29