| Drive shaft fault diagnosis = |
| Symptom |
| 1.The drive shaft is of radial runout. |
| >The drive shaft sliding yoke fails to be assembled correctly. |
| >The drive shaft is distorted or bending. |
| >The universal knuckle shaft journal or needle bearing is worn out. |
| >The connecting bolt is loose. |
| >The drive shaft is unbalanced. |
| >The intermediate support bearing is worn out or damaged. |
| >The intermediate support bearing bracket is loose or the rubber cushion block is aged. |
| 2.There is abnormal noise at starting and during running |
| >The universal knuckle is worn out or damaged. |
| >The sliding yoke is worn out or damaged. |
| >The drive shaft is loose. |
| >The needle bearing, sliding yoke and intermediate bearing are short of lubricant. |
