Possible causes of deviation from prescribed figure

- Checking conditions not met. E.g. wheels not completely locked, manometer or locking hydraulics not properly bled

- Clutch plates not in good condition

- Hydraulic pressure not acting on clutch plates at level indicated, e.g. due to incorrectly adjusted end support screw of engaging lever (only with adjustable lever/engaging lever is in contact).

For checking breakaway moment, measure at several points (angles) within one turn of the wheel.

Once locking moment has been reached, immediately read off pressure on manometer. Note both actual values (moment + pressure).

Porsche 911 Engine Diagram

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