JLG G5-18A Service Manual - Manual (Page 69)

5-9 G5-18A, 2505H, 25.5
Axles, Drive Shafts, Wheels and Tires
5.5 DRIVE SHAFTS
5.5.1 Drive Shaft Inspection
Whenever servicing the machine, conduct a visual
inspection of the drive shaft and cross and bearing
assembly (universal joints, or U-joints). A few moments
spent doing this can help prevent further problems and
down time later.
Inspect area where the drive shaft flange yoke and slip
yoke mount to the drive shaft. Attempt to turn drive shaft
in both directions. Look for excessive looseness, missing
parts, cracks or other damage. Worn or damaged drive
shaft and cross and bearing assembly may cause an
excessive amount of vibration or noise.
Note: Any bolt removed from the drive shaft assembly
MUST be replaced. Do Not re-torque
5.5.2 Drive Shaft Maintenance
Refer to Section 2.6, “Lubrication Schedule,” for
information regarding the lubrication of the grease fittings
on the drive shafts.
5.5.3 Drive Shaft Removal
1. Park machine on a hard, level surface.
2. Fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL.
3. Engage park brake and shut engine OFF.
4. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
5. Properly disconnect battery.
6. Open engine cover. Allow system fluids to cool.
7. Block the wheels.
8. The drive shaft assembly is a balanced assembly.
Mark yoke and axle, transmission and shaft and slip
yoke so that these components can be returned to
their original positions when reinstalled.
9. Yokes at both ends of drive shaft must be in same
plane to help prevent excessive vibration.
10. Remove hardware (1) securing drive shaft to rear
axle flange.
11. Remove hardware (2) securing drive shaft to front
axle flange.
12. Remove drive shaft assembly (3).
5.5.4 Drive Shaft Cleaning and Drying
1. Disassemble and clean all parts. Allow to dry.
2. Remove any burrs or rough spots from all machined
surfaces. Re-clean and dry as required.
5.5.5 Drive Shaft Installation
1. Raise drive shaft assembly (3) into position. The
slip-yoke (4) end of drive shaft mounts toward rear
axle. If reinstalling a drive shaft previously removed,
align flange yokes according to alignment marks
made during removal.
2. Apply locking compound to all mounting bolts.
3. Install hardware securing drive shaft to front axle.
Torque capscrews to 102 lb-ft (139 Nm).
4. Install hardware securing slip-yoke to rear axle.
Torque capscrews to 102 lb-ft (139 Nm).
5. Properly connect the battery.
6. Unblock the wheels.
7. Close and secure the engine covers.
8. Remove the Do Not Operate Tags from both the
ignition key and the steering wheel.
MY8900
TO REAR AXLE
TO FRONT AXLE
1
2
2
3
4