5.9
3507, 3508, 3509, 3512, 3513, 4007, 4008, 4009, 4012, 4013
Axles, Drive Shafts, Wheels and Tires
5.4
DRIVE SHAFTS
5.4.1
Drive Shaft Inspection and Service
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.
5.4.2
Drive Shaft Maintenance
Refer to Section 2.6, “Lubrication Schedules,” 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.
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the engine to cool.
4. Disconnect the battery negative (-) cable at the
battery negative (-) terminal.
5. Block the wheels.
6. 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.
7. Remove the four capscrews and two straps securing
the bearing cross to the transmission output shaft
flange.
8. Remove the four capscrews and two straps securing
the bearing crosses to the axle.
9. Remove the front drive shaft assembly.
10. Repeat the above procedure for the rear drive shaft.
5.4.4
Drive Shaft Cleaning and Drying
1. Disassemble and clean all parts using an approved
cleaning fluid. Allow to dry.
2. Remove any burrs or rough spots from all machined
surfaces. Re-clean and dry as required.
5.4.5
Drive Shaft Installation
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.
1. Raise the drive shaft assembly into position. The
slip-yoke end of the drive shaft mounts toward the
axle. If reinstalling a drive shaft previously removed,
align the flange yokes according to the alignment
marks made during removal.
2. Install the four capscrews and two straps securing
the bearing crosses to the transmission. Torque the
capscrews to 38 Nm (28 lb-ft).
3. Install the four capscrews and two straps securing
the bearing crosses to the axle. Torque the
capscrews to 38 Nm (28 lb-ft).
4. Repeat the above procedure on the rear drive shaft.
To Transmission
To Axle
