JLG 510AJ Service Manual - Manual (Page 87)

SECTION 3 - CHASSIS AND TURNTABLE
3121181 – JLG Lift – 3-45
Disassembly
NOTE: Removal of 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.
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).
8. Remove all fittings from unit. Discard O-rings on fittings.
9. Using an 11/16 inch hex wrench, loosen the speed sen-
sor lock nut (14) if equipped. Then remove the 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.
5
3
7
13
2
6
9
11
1
4
8
10
12
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
Figure 3-27. Loop Flushing Spool
15
20
16
16
19
17
18
21
14
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
Figure 3-28. Plugs, Fittings, and Speed Sensor