The prop shaft and viscous coupling unit should be removed as an assembly and then separated on the bench. Reference mark the prop shaft connection, then unbolt from the IRD (intermediate reduction drive) and differential before unbolting the VCU (viscous coupling unit) support bearing (take care that the bearing bolt don’t share off, if light). Prevent the forward CV joint at the IRD being excessively angled; otherwise the roller bearing may be damaged.
The prop shafts are splined on to the shaft of the viscous coupling. They’ll sometimes pull away from the coupling after releasing the signal securing bolt and removing the U shaped washer under it head if not, try driving a steel wedge carefully between the bolt head and the prop shaft yoke to separate them. When the connection begins to move, wind the bolt out some more, and repeat. But if the connection is very tight this may simply bend the bold. Then it’s down to ingenuity and force you can save hassle by removing the the assembly yourself and letting a garage strip and rebuild it. The viscous coupling’ tows support bearings need to be removed from and refitted to the VCU using a hydraulic press. Renew these when the VCU is off.
When refitting, offer the complete assembly into position and keep it all supported while the VCU supporting bearing bolts are fitted loosely. Bolt the rear prop shaft flange to the diff and the CV flange to the IRD aligning with the marks made before removal. Ensure the viscous coupling’s support bearing are accurately at 90” to the center line of the coupling before tightening the rear bearing bolts, then the front one.
So we can’t recommend a specific supplier, but these parts are easily available from many of the outlets
No comments:
Post a Comment