SECTION 3 - CHASSIS & TURNTABLE
3121659
– JLG Lift –
3-23
13.
Using an 8 mm internal hex wrench, remove endcap
screws (22).
14.
Remove endcap (23). Remove O-ring (24) from housing
or endcap.
NOTE:
When endcap screws are removed, pressure from servo
spring will cause endcap to bind on shaft. Press down on
portion of endcap covering servo piston and hold endcap
level while removing.
Figure 3-13. Valve Plate & Rear Shaft Bearing
DO NOT SCRATCH VALVE PLATE SURFACE.
15.
Remove valve plate (25) and timing pin (26) from endcap.
NOTE:
Each displacement has a unique valve plate. The last two
digits of the part number are stamped on its surface.
16.
Remove and discard O-rings (27, 28).
17.
Remove rear shaft bearing (29) from endcap with a bear-
ing puller.
DO NOT DRIVE BEARING PAST REAR SHAFT JOURNAL. BEARING MAY BECOME
TRAPPED ON SHAFT AND DAMAGED.
NOTE:
Bearing may be difficult to remove with a puller. Try this as
an alternative: Pack bearing cavity with heavy grease.
After shaft is removed, insert it into bearing cavity and tap
lightly with a soft mallet on the splined end. Grease will
force out bearing.
18.
Remove minimum angle stop (29) and servo spring (30)
from housing.
24
22
23
22. Screw
23. End Cap
24. O-ring
Figure 3-12. End Cap
26
28
29
30
29
27
25
25. Valve Plate
26. End Cap
27. O-ring
28. O-ring
29. Angle Stop
Servo Spring
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: ......