Cause | Elimination Method |
Knocking in the driveline when starting off, during sudden acceleration or gear shifting | |
Loosening the bolts and nuts securing the flexible coupling and universal joint flanges | Tighten the nuts to the torques given in the appendix |
Increased circumferential clearance in the spline connection of the front propeller shaft | Check the clearance, if it is more than 0.30 mm, replace worn parts |
Increased clearance in the bearings of the cardan joints | Repair hinges with replacement of worn parts |
Noise and vibration of the driveline | |
Deformation of cardan shafts | Straighten on a press or replace shafts |
Mismatch between the mounting marks of the front shaft and the corresponding coupling | Remove the cardan gear and match the marks made during disassembly |
Cardan shaft imbalance | Check balance; with an unbalance exceeding 2.15 N·mm (220 gf mm), proceed as described in subsection 7.3.7. |
Wear or damage to the centering sleeve of the elastic coupling flange and the centering ring of the gearbox output shaft | Replace flexible coupling flange assembly with bushing and output shaft centering ring |
Increased clearance in the intermediate support bearing | Replace bearing |
Intermediate bearing damage | Replace support |
Loosening the nuts securing the cross member to the vehicle body | Tighten the cross member mounting nuts |
Increased clearance in the bearings of the cardan joints or jamming of the joints | Repair hinges with replacement of worn parts |
Elastic Coupling Flange Gland Sleeve Loose | Press the stuffing box and crimp its clip; in case of leakage of grease, replace the oil seal |
Loosening the front propeller shaft yoke nut | Disconnect the front shaft from the rear and tighten the nut, then caulk the nut |
Insufficient spline lubrication | Lubricate the spline connection with FIOL-1 grease |
Lubricant leak | |
Weakening of the cage of the stuffing box of the flange of the elastic coupling, wear of the seal | Press the stuffing box and crimp its clip, replace the worn stuffing box |
Damaged or worn shaft seals | Disassemble the hinges and replace the seals, if necessary, replace the cross assembly with bearings |