Our useful tips provide only an overview. The installation instructions and operating instructions provided by the vehicle manufacturer and the warning and safety instructions contained therein must be observed! All work must be performed by a trained professional. The pictures used and the procedure described in our tips are examples and may vary depending on the vehicle manufacturer and axle design.
The clutch will only work perfectly over the long term if the hub spline is optimally greased.
If the clutch disk is not greased correctly when it is installed, tribocorrosion may occur in the hub spline. In this case, the clutch disk will seize instead of sliding along the transmission input shaft. ZF Aftermarket emphasizes that the hub spline must always be greased correctly.
If the hub spline is not greased, then tribocorrosion can occur.
The VOX Car Doctors visited ZF Aftermarket at Automechanika 2014. Celebrity TV mechanics Hans-Jürgen Faul and Holger Parsch demonstrate how to grease a clutch disk properly in the video.
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Lightly grease all around the hub spline of the clutch disk and the transmission input shaft with SACHS high-performance grease. Now the clutch disk is moved back and forth along the transmission input shaft, and then the excess grease is removed from the transmission input shaft and from the hub spline.
Lightly grease the hub spline of the clutch disk and the transmission input shaft.
If too much grease is used, centrifugal forces will transfer it onto the clutch linings during operation. Linings soiled in this way will cause the clutch to grab or chatter during operation.
Before installing the clutch disk, check its lateral run-out, which may be a maximum of 0.5 mm. Larger values can cause drag.
Not every lubricant is suitable. It has to be temperature-resistant and withstand high surface pressure. Unsuitable lubricants can become liquid, solidify, become resinous or burn, causing malfunctions. Every SACHS clutch kit is supplied with a lubricant pad which is sufficient to lubricate the hub splines once. This high-performance grease optimally meets requirements.
Both products shown can be found in the online product catalog. Enter the corresponding part numbers in the search box at the bottom edge of the browser. These are:
SACHS high-performance grease with lubricant pad and tube
![ZF [pro]Tech](/remotemedia/unused/unused-mc-sx/content-related-2/protech-key-visual-lkw-200x74px_540x360x2.jpg?v=3746738738)
