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Girling Mk2a Servo 5”

greencarmark

Silver Level Sponsor
Does anyone know what function the calibration nut/screw on the base of the vacuum chamber performs? Thanks
 

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Pete S.

Bronze Level Sponsor
From the Girling service guide,

“In the end cover of the Powerstop is fitted a piston return stop, which determines the gap between the output piston and the piston rod when fully returned. The gap governs the flow of fluid through the unit when at rest and the smoothness of the application of power."

"The position of the stop is set and locked during final test and should not be disturbed in service.”

Best wishes.
 

greencarmark

Silver Level Sponsor
From the Girling service guide,

“In the end cover of the Powerstop is fitted a piston return stop, which determines the gap between the output piston and the piston rod when fully returned. The gap governs the flow of fluid through the unit when at rest and the smoothness of the application of power."

"The position of the stop is set and locked during final test and should not be disturbed in service.”

Best wishes.
Thanks much!
 

Pete S.

Bronze Level Sponsor
Thanks much!
You're are welcome. I neglected to include the next paragraph --> "A design modification renders unnecessary the external piston stop and units being manufactured at the present time do not incorporate this feature."

Adds a bit of clarity.
 
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