Hydraulic release bearings: operating with the correct gap.

Hydraulic release bearings: operating with the correct gap.

By Alfie Bilk, December 5, 2014

TechTipsUnlike OEM clutch release bearing mechanisms that operate in constant contact with the clutch diaphragm fingers, high-performance aftermarket release bearings function only when the clutch pedal is depressed.

Typically, these release bearings operate with 0.800in of potential travel. But more importantly they must be positioned with the correct gap when the pedal is not depressed; that is, the gap between the contact face of the release bearing and the clutch fingers. Excessive gap causes improper release; inadequate gap can cause the bearing to over-travel and collide with the snap ring or encounter slippage as the clutch wears and the fingers move back, making contact with the bearing.

00 (Ram-bearing-illustration)

Typically, Ram aims for a gap (between the contact face of the release bearing and the clutch fingers) of 0.200in on dual-disc and 0.150in on single-disc clutch installations.

Single-disc clutches operate best with a gap of 0.150in while dual-disc sets require a gap of around 0.200in. Because the clutch fingers automatically travel toward the release bearing as the friction disc/s wear, an additional clearance of 0.050in is assigned to the dual-disc arrangement. Click to enlarge illustration.

To establish the correct position of the release bearing on the input shaft, these measurements are required. Click here to access them:

or to watch the video click here.

Source:

Ram Clutches
Columbia,  SC 29203
(803) 788-6034
www.RamClutches.com

 

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