Wear Limit Technical Data − Turbo With Cast Iron Brake Discs - Porsche 996 TT Repair Manual

possibility for TC, FZR and MSR.
2) **
EBV = electronic brake distributor (brake proportioning control). As a result, no screw−in brake
proportioning valves are required!
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Wear limit technical data − Turbo with cast iron brake discs
Depending on the wear of cast iron brake discs, two condition criteria can make replacement necessary:
1. Cracking in the holed (perforated) brake disc friction plates is in an advanced state.
2. Brake disc minimum thickness is not attained due to wear (material erosion due to friction).
Designation
Pad thickness
Brake disc thickness, new
Minimum brake disc thickness
* 1)
after machining
Brake disc wear limit
Peak−to−valley surface roughness
of the brake disc after machining, max.
Thickness tolerance of the brake discs, max.
Lateral runout of the brake disc, max.
Lateral runout of the wheel hub, max.
Lateral runout of the brake disc when installed, max.
Pushrod play (measured at the brake pedal plate)
Parking brake
(handbrake)
Parking brake drum
Brake shoe width
Brake pad thickness
1) *
The brake disc must only be reworked symmetrically, i.e. from both sides evenly.
996420, 996421, 996450, 996451, 996620, 996621, 996650, 996651
Technical data − Turbo with cast iron brake discs
einordnung
Note, dimensions
front approx. 12.0 mm
rear approx. 12.0 mm
front 34 mm
rear 28 mm
front 32.6 mm
rear 26.6 mm
front
rear
0.006 mm
0.02 mm
0.03 mm
0.03 mm
0.06 mm
approx. 1 mm
Drum brake acting mechanically on
both rear wheels
180 mm
25 mm
4.5 mm
Wear limit
2 mm
2 mm
* 1)
* 1)
32.0 mm
26.0 mm
181 mm
2 mm
297