SECTION 3 - CHASSIS & TURNTABLE
3-22
– JLG Lift –
3121659
Disassembly
NOTE:
Removal of endcap voids warranty.
During assembly, coat all moving parts with a film of
clean hydraulic oil. This ensures parts are lubricated dur-
ing start-up.
Replace all O-Rings and gaskets. Lightly lubricate O-rings
with clean petroleum jelly prior to assembly.
1.
Using a 11/16" wrench, remove plug (1) and (2).
2.
Using a 5/8" 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.
9.
Using an 11/16" hex wrench, loosen speed sensor lock
nut (14) if equipped and remove speed sensor. Units
without speed sensor have an O-ring plug (15) installed
in that location; remove it with a
1/4"
inch internal hex
wrench.
10.
Using a 1/4" 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" internal hex wrench, remove drain plugs
(19, 20). Discard O-rings.
12.
If equipped with axial ports, use a 9/16" an internal hex
wrench and remove work port plugs (21). 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 3-10. 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 3-11. Plugs, Fittings, and Speed Sensor
Summary of Contents for JLG 450AJ
Page 2: ......
Page 32: ...SECTION 1 SPECIFICATIONS 1 18 JLG Lift 3121659 NOTES...
Page 80: ...SECTION 4 BOOM PLATFORM 4 2 JLG Lift 3121659 Figure 4 1 Boom Assembly...
Page 81: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 3 Figure 4 2 Main Boom Assembly Sheet 1 of 2...
Page 82: ...SECTION 4 BOOM PLATFORM 4 4 JLG Lift 3121659 Figure 4 3 Main Boom Assembly Sheet 2 of 2...
Page 83: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 5 Figure 4 4 Upper Boom Assembly...
Page 84: ...SECTION 4 BOOM PLATFORM 4 6 JLG Lift 3121659 Figure 4 5 Jib Assembly...
Page 118: ...SECTION 4 BOOM PLATFORM 4 40 JLG Lift 3121659 NOTES...
Page 156: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 5 38 JLG Lift 3121659 NOTES...
Page 164: ...SECTION 6 JLG CONTROL SYSTEM 6 8 JLG Lift 3121659 Figure 6 2 Tilt Sensor Location...
Page 169: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 13 Figure 6 7 Analyzer Connecting Points...
Page 181: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 25 Figure 6 19 Platform Module Sheet 1 of 2...
Page 182: ...SECTION 6 JLG CONTROL SYSTEM 6 26 JLG Lift 3121659 Figure 6 20 Platform Module Sheet 2 of 2...
Page 224: ...SECTION 6 JLG CONTROL SYSTEM 6 68 JLG Lift 3121659 NOTES...
Page 340: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 116 JLG Lift 3121659 NOTES...
Page 341: ......