Disassembly, Disassembly -21, Loop flushing spool -21 – JLG 660SJ Service Manual User Manual
Page 65: Plugs, fittings, and speed sensor -21
SECTION 3 - CHASSIS & TURNTABLE
3121298
– JLG Lift –
3-21
Disassembly
NOTE:
Removal of endcap voids warranty.
During assembly, coat all moving parts with a film of clean
hydraulic oil. This ensures 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.
Figure 3-24. 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).
Figure 3-25. 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.
1.
Plug
2.
Plug
3.
Plug
4.
O-ring
5.
O-ring
6.
O-ring
7.
Spring
8.
Spring
9.
Spring
10. Washer
11. Washer
12. Shift Spool
13. Orifice Poppet
5
3
7
13
2
6
9
11
1
4
8
10
12
14. Lock Nut
15. O-ring Plug
16. Control Line Plug
17. Control Line Plug
18. Cavity Plug
19. Drain Plug
20. Drain Plug
21. Work Port Plug
15
20
16
16
19
17
18
21
14