Lull 944E-42 Service Manual - Manual (Page 162)

Axles, Drive Shafts, Wheels, Tires and Brakes
5.16 Model 644E-42/944E-42 Rev. 6/04
5.4 DRIVE SHAFTS
5.4.1 Drive Shaft Inspection and Service
Whenever servicing the vehicle, conduct a visual
inspection of the drive shafts, and cross and bearing
assemblies (universal joints, or U-joints). A few moments
spent doing this can help prevent further problems and
down time later.
Inspect areas where the drive shaft flange yokes and slip
yokes mount to the drive shafts. Attempt to turn each
drive shaft in both directions. Look for excessive
looseness, missing parts, cracks or other damage. Worn
or damaged drive shafts and cross and bearing
assemblies may cause an excessive amount of vibration
or noise.
5.4.2 Drive Shaft Maintenance
Refer to the appropriate Owners/Operators Manual for
information regarding the lubrication of the grease fittings
on the drive shafts.
5.4.3 Drive Shaft Removal
IMPORTANT: To help ensure optimum performance, the
drive shaft assemblies are specially balanced as a unit at
the factory. When servicing any flange yoke, slip yoke or
drive shaft tube, order a complete assembly if
components are bent or damaged. Refer to the
appropriate Parts Manual for ordering information.
Note: The drive shaft assemblies are balanced
assemblies. Mark the yoke and axle, transmission,
transfer case, and the shaft and slip yoke so that these
components can be returned to their original positions
when reinstalled. Yokes at both ends of the drive shaft
must be in the same plane to help prevent excessive
vibration.
a. Transmission-to-Axle Drive Shafts
1. Level the vehicle, ground the carriage, place the
travel select lever in the (N) NEUTRAL position,
place the neutral lock lever in the (N) NEUTRAL
LOCK position, engage the parking brake switch and
shut the engine OFF.
2. Place an Accident Prevention Tag on both the
ignition key switch and steering wheel, stating that
the vehicle should not be operated. (Refer to Section
1.5, “Accident Prevention Tag Usage.”)
3. If the vehicle has dual batteries, disconnect both
negative battery cables (1 and 2) from both
batteries.
To access the lower battery (3), loosen the knob (4)
far enough so that the lip (5) on the upper battery box
clears the knob. Lift up the upper battery box (6) and
swing it out, so that the box clears the hydraulic tank
support bracket, to gain access to the lower negative
battery cable (1). Disconnect the lower negative
battery cable.
4. The drive shaft assembly is a balanced assembly.
Mark the yoke and axle, transmission, and the shaft
and slip yoke so that these components can be
returned to their original positions when reinstalled.
Yokes at both ends of the drive shaft must be in the
same plane to help prevent excessive vibration.
5. Remove the four capscrews (7) and two straps (8)
securing the bearing cross to the transmission
output shaft flange.
6. Remove the four capscrews (9) and two straps (10)
securing the bearing crosses to the axle.
7. Remove the front drive shaft assembly (11).
8. Repeat Steps 4 thru 7 to remove the rear drive shaft
assembly.
MU0650
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