Disassembly - JLG 1850SJ Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

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.
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 3-18. 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).
3-26
6
9
11
9. Spring 12. Shift Spool
10. Washer 13. Orifice Poppet
11. Washer
19
2
14. Lock Nut
15. O-ring Plug
16. Control Line Plug
17. Control Line Plug
Figure 3-19. 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.
17
15
16
20
18. Cavity Plug
19. Drain Plug
20. Drain Plug
21. Work Port Plug
14
21
18
16
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