GILLIG LOW FLOOR, Руководство по обслуживанию

Страница: 131 / 506

Transmission/Driveline/Rear Axle
3
Universal Joint
Universal Joints (U-joints) are located at each end of the drive shaft and allow the drive shaft to rotate
while at an angle. The simple universal joint is basically two U-shaped yokes connected by a cross mem-
ber called a spider. The spider is shaped like an X and the arms that extend from it are called trunnions.
The spider allows the yokes to rotate while at an angle to each other. The U-joints contain bearings that
must be lubricated periodically.
Maintenance
Follow the “Maintenance Schedule” in the Preventive Maintenance chapter of this manual for periodic
lubrication and inspection of the driveline assembly.
1. Inspect the pinion yoke and transmission yoke to ensure the bolts are tight.
2. Attempt to move the yoke up and down by hand to ensure the needle bearings are not worn to the
extent that play is observed.
3. Inspect the assembly to observe any wear, torsion cracks, or twisting damage to any component
of the drive line. Ensure that periodic lubrication is performed and that all moving parts can
move freely without binding.
Locking tabs should not be reused. Replace used locking tabs with
new ones.
4. Ensure the locking tabs on the bearing straps are bent over to secure the capscrews that attach the
bearing straps to the yokes.
Drive Shaft Removal
Refer to Figure 4- 6.
1. Park the coach on level ground and block the wheels to prevent movement of the coach.
2. Disconnect the ground cable from the batteries.
The drive shaft is heavy. Support it securely as the capscrews
are removed.
3. Bend the lock tabs away from the capscrews on the two bearing straps on the yoke attached to
the differential.
To prevent damage to the bearings during removal, DO NOT let the
bearings drop on the floor.