PREVENTIVE MAINTENANCE
SECTION V
Figure 5B-5. Adjust Boom Hoist Pawls
point, cover the pressure relief hole with a finger and con-
To insure proper lubrication of all four bearing assemblies
tinue to apply the pressure until grease appears at the
of universal joints, it is essential that lubricant be added
sleeve yoke seal. This will insure lubrication of the spline.
until it appears at all journal cross bearing seals (see Figure
5B-6). This assures removal of dirt particles and other con-
taminants that may find their way into the bearings and in-
CHECK PROPEL DRIVESHAFT OIL LEVEL
dicates to the mechanic that the bearings are fully lubri-
The propel driveshaft oil level plugs are located on the out-
cated.
board side of the propel driveshafts. Remove the plugs and
check to be sure the oil level is up to the level opening. Add
Do not assume that bearing cavities have been filled with
oil is necessary through the filler opening located on the in-
new lubricant unless flow is noticed around all four bear-
put housing of the crawler frames.
ing seals.
CHECK PROPEL GEAR CASE OIL LEVEL
Remove the level plug from the motor side of the gear case
The sliding spline sections should also be lubed as shown in
to check the level of these units. The oil should be just up to
Figure 5B-6. Apply grease gun pressure to the lubrication
the bottom of the level openitng. Be sure the machine is on
fitting until lubricant appears at the pressure relief hole in
level ground when checking the oil level (see Figure 5B-7).
the welch plug at the sleeve yoke end of the spline. At this
5-10
