How to deal hino bus drive shaft failure
Symptom：
Abnormal vibration
when driving
Possible cause ：
Looseness of universal joint yoke and
flange tightening nuts.
Excessive propeller shaft runout Worn or damaged universal joint Incorrect phasing of the yokes
Remedy/Prevention：
Tighten the nuts.
Rpl
Replace the universal joint.
at tephasingarrsrretly.
PROPELLER SHAFT：
IMPORTANT
POINT-DISMOUNTING DISCONNECT THE PROPELLER SHAFT FROM THE FLANGE ON THE DIFFERENTIAL AND TRANSMISSION.
1.Draw the match marks on the flange and yoke.
2.Remove nuts and bolts.
IMPORTANT POINT-DISASSEMBLY DISASSEMBLE THE UNIVERSAL JOINT.
1.
Remove the retainer ring from the yoke.
2.
Position the yoke under the arbor press and push universal joint partially out of the yoke lug.
The bearing is protruded from the yoke.
3.
Place the propeller shaft assembly in a vice, gripping protrud-
ing bearing with vice. Tap on the yoke in area shown to achieve removal of universal joint bearing.
4.
Place the yoke under arbor press with opposite side of universal joint spider in up position and place small push tool on the universal joint spider end.
5.
Press the opposite bearing out of the yoke lug.
6.
Remove the spider from the yoke.
7.
Remove the bearing from the yoke lug.
NOTE: Keep the original location of the bearings, thrust washers, spider and retainer rings in mind. These parts have to be replaced in the same position as before disassembly when re-assembly.
DISASSEMBLE THE DUST SEAL.
1. Remove the sliding yoke.
2. Remove the dust seal.
IMPORTANT POINT-ASSEMBLY ASSEMBLE THE UNIVERSAL JOINT BEARINGS.
1. After the universal joint bearing assemblies are thoroughly clean, apply clean lubricant to the rollers.
2. Check each bearing for missing rollers.
NOTE: Remove the stale grease from the bearing cage. Lubricate grease containing molybdenum disulfide on the needle roller, seal lip and the both surface of thrust washer.
INSTALL THE SPIDER AND UNIVERSAL JOINT BEARINGS INTO THE YOKES.
1. Put the spider into the yoke and then set the universal joint bearings on the yoke.
NOTE: When assembling the universal joint spider to the sliding yoke, position the lubrication fitting so that it is to the yoke side as shown in figure.
2.Press the universal joint bearings into the yokes.
NOTE:O Play attention not to damage the seal lip of the universal joint bearing when installation.
o Align the phasing arrow on the universal joint yoke and the phasing arrow on the sliding yoke.
CHECK THE STARTING TOROUE OF THE UNIVERSAL JOINT USING A SPRING BALANCER.
Assembly Standard:15-50 kg-cm(13-43 lb. in)
1. If the torque is below 15 kg-cm(13 lb. in), replace the thrust washer to the thicker one.
2. If the torque is below 50kg-cm (43 lb. in), replace the thrust washer to the thinner one.
ASSEMBLE THE SLIDING YOKE AND PROPELLER SHAFT SUB ASSEMBLY.
1.Remove the stale grease from the spline of the propeller shaft.
2.Install the new dust seal on the shaft by pushing it in the seal groove.
3.Apply the grease containing molybdenum disulfide on the spline and sliding area of the dust seal.
4. Align the phasing arrow on the shaft sub assembly and the phasing arrow on the sliding yoke.
5. After assembling the propeller shaft, check the phasing arrow as whon in the figure.
6. Adjust the direction of lubrication fitting for sliding yoke side and propeller shaft side as shown in figure.
IMPORTANT POINT-MOUNTING CONNECT THE PROPELLER SHAFT TO THE FLANGE ON THE DIFFERENTIAL AND TRANSMISSION.
1.Align the match marks on the flange and yoke.
2.Tighten the bolts and nuts.
3.Lubricate the universal joints and sliding spline.
Grease:Refer to recommended lubricants list.
