Service Manual Instruction Manual

SECTION 3 - CHASSIS & TURNTABLE
3121616 – JLG Lift – 3-19
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.
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 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.
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 3-19. 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 3-20. Plugs, Fittings, and Speed Sensor