Contents: Without disassembly ↓ After disassembly ↓
Without disassembly
After cleaning and washing the shafts, check the cardan joints for ease and smoothness of fork rotation and the absence of significant axial and radial clearances. Check the balance of the cardan transmission on a balancing stand. If the fork rotation is smooth, there are no jams, the imbalance does not exceed 220 gf mm, the circumferential clearance in the splined connection does not exceed 0.30 mm and grease is not ejected through the crosspiece seal, then it is not recommended to disassemble the cardan transmission.
After disassembly
Check the front and rear shaft runout separately using the following instructions.
Install the front cardan shaft in the centers and, turning it, check the radial runout, which should not exceed: on the pipe, at a distance of 70 mm from the end welds, 0.55 mm, at the center of the pipe 0.35 mm, at the outer diameters of the splines 0.1 mm. Then install the rear cardan shaft in the centers and, turning it, check the runout, which should not exceed: on the pipe, at a distance of 70 mm from the end welds, 0.55 mm, at the center of the pipe 0.35 mm. If the runout exceeds the permissible limits, straighten the shafts under a press. If the runout is greater, replace the shafts with new ones.
Measure the circumferential clearance in the splined joint of the front cardan shaft sliding fork. It should not exceed 0.30 mm. Check the condition of the sleeve and the seal of the sliding coupling. If necessary, replace the seal, and if damaged, the sleeve.
The original is available on the website [vazbook]
Check the condition of the bearing housings, needles, crosspiece pins, oil seals and forks. If the bearing housings, needles and crosspiece pins, as well as the oil seals and their housings are damaged or worn, replace the crosspiece assembly with bearings. If the crosspiece pins and bearings are in good condition, check the condition of the oil seals and their housings. If the oil seals have significant annular wear or leak grease, which can be detected when checking the technical condition of the cardan transmission without disassembling, replace the oil seals with new ones. The diameter of the fork hole for the needle bearing should not exceed 23.825 mm.
Inspect the rubber elements of the elastic coupling. If there are cracks or separation of the rubber from the metal inserts, replace the elastic coupling.
Check the condition of the centering sleeve of the flexible coupling. If the sleeve is significantly worn or damaged, replace the flange assembly. Determine the condition of the intermediate support bearing by turning the inner ring in both directions and simultaneously pressing it against the outer ring. In this case, the inner ring of the bearing should rotate smoothly, without jamming. Check the bearing seals. If the bearing is worn or damaged, replace it with a new one. Check the intermediate support for damage or deformation; replace it with a new one if necessary. The main dimensions of the mating parts and the limits of permissible wear in operation are given in Table 6.
