Contents: Examination ↡ Replacement ↡
Examination
1. When the bearing wears out, characteristic noise and vibration appear. Remove the cardan shaft and check the condition of the bearing.
2. Check that the bearing rotates smoothly and without jamming and that there is no play in it. If there are any defects, replace the bearing. Check the condition of the rubber protective cover and replace it if necessary.
Replacement
Attention! To replace the central bearing of the cardan shaft, it is necessary to use a puller and a hydraulic press, as well as the appropriate mandrels.
Elements of the central part of the cardan shaft
1 – front part of the propeller shaft; 2 – rear part of the propeller shaft; 3 – spline coupling nut; 4 – rubber protective cover; 5 – protective cover; 6 – protective cover; 7 – central bearing bracket; 8 – bearing
1. Remove the driveshaft.
2. Place alignment marks on the front and rear of the driveshaft. Some models have alignment marks already on the driveshaft. The mark on the front of the driveshaft should be located between the two marks on the universal joint on the rear of the driveshaft (see fig. Location of alignment marks on both parts of the drive shaft file).
3. Remove the rubber protective boot from the spline coupling nut, then unscrew the nut and separate the two halves of the driveshaft (see fig. Elements of the central part of the cardan shaft).
4. Remove the rubber protective cover from the drive shaft.
5. Using a puller, remove the center bearing with bracket from the driveshaft, marking its location. Remove the front and rear covers of the center bearing.
6. Place the bracket with the bearing on the stand and, using a tubular mandrel of the appropriate diameter, press the bearing out of the bracket.
7. Check the condition of all parts and replace if necessary. The central bearing protective caps and rubber protective boot must be replaced depending on their condition.
8. Place the bearing mounting bracket on a stand and, using a tubular drift that rests on the outer race of the bearing, press the new bearing into the bracket.
9. Clean the driveshaft and install a new rear protective cover.
10. Install the center bearing with bracket on the propeller shaft using a tubular drift resting on the inner ring of the bearing.
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11. Install the front protective cover and a new rubber protective boot onto the propeller shaft, fitting it into the grooves of the propeller shaft.
12. Apply a thin layer of molybdenum disulfide grease to the driveshaft splines and join the two driveshaft halves together according to the marks made earlier.
13. Insert the rubber protective boot into the groove of the spline coupling nut and install the propeller shaft.