Clutch Wear; Fluid For Clutch Actuation - Porsche 911 GT3 Cup 2018 Techical Manual

2.2.2 Clutch wear

New sintered lining
Replace at
The contact pressure of the cup spring remains constant up to this dimension (3 mm). Use
"Racing Fluid-325 °C" from Performance Friction Brakes as clutch fluid. If it falls below the
limit above, the clutch disk should be replaced.

2.2.3 Fluid for clutch actuation

Racing Brake Fluid-325° from Performance Friction Brakes is used as clutch fluid.
Porsche spare part No.: 991.355.960.8A
Porsche recommends to vent the system after each session and to change the fluid
after each race weekend.
Venting:
WARNING
 Depress the clutch pedal 2 to 3 times and keep it depressed
 Shortly open the vent valve rear cross member (illustration 2.2.3.1) – the
clutch pedal has to be depressed and should not be released
Close the vent valve again

Increase pressure again by pumping pedal

 Repeat this procedure 2 to 3 times
 Check the fluid level on the fluid reservoir and replenish fluid, if required
Replacement:
 Remove the old fluid from the reservoir and fill with new fluid
 Then proceed as for venting, perform approx. 10 times the steps mentioned
above and replenish fluid in the reservoir if required.
Version: 4/20/2018
3.40 mm (0.13")
3.00 mm (0.12")
Corrosive fluids
Danger of chemical burns
Wear personal protective equipment.

 Ensure good ventilation.
Avoid contact with corrosive fluid.

 If you do come into contact, wash off
immediately with plenty of warm water and
contact a doctor if necessary.
Powertrain
2.2.3.1
911 GT3 Cup (991 II)
MY 2018
65