Brake Pad

WM 4600TW Technical data/Brake wear limit




















Technical data/Brake wear limit

Technical data - C2/C4 up to MY 2008

Operating brake (foot brake):

Dual-circuit brake system with brake-circuit division per axle.
Internally ventilated and perforated grey cast iron brake discs on front and rear axle.
Four-piston monobloc caliper on front and rear axle.
Standard Porsche Stability Management (PSM 8.0).





Test values/wear limits - C2/C4

Information:
Depending on the wear of cast iron brake discs, two condition criteria can make replacement necessary:
Cracking in the holed (perforated) brake disc friction plates is in an advanced state.
Minimum brake disc thickness is not retained due to wear (material erosion due to friction).








Information on machining cast-iron brake discs

Possible complaints

Damage due to lack of use (rusting). This causes vibrations in the steering wheel, noises and brake pedal pulsation.
Brake disc becomes distorted as a result of serious driving, e.g. on a racing circuit.
Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.

Procedure

Check brake disc for cracks, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.
If necessary, (depending on the actual brake disc thickness and the brake disc wear limit) machine the brake disc using one of the disc brake dressing machines approved by Porsche.
The brake disc must only be reworked symmetrically, i.e. equally from both sides! Observe the operating instructions for the disc brake dressing machine!

Technical data for C2/C2S and C4/C4S - PCCB brakes (option)

Operating brake (foot brake):

Dual-circuit brake system with brake-circuit division per axle.
Internally ventilated and perforated PCCB brake discs on front and rear axle.
Six-piston monobloc caliper on front axle and four-piston monobloc caliper on rear axle.
The brake calipers are painted yellow for visual differentiation.
Standard Porsche Stability Management (PSM 8.0).





Test values/wear limits for C2/C2S and C4/C4S - PCCB brakes (option)

Information:
The following condition criteria can make replacement necessary depending on the wear of the PCCB brake discs:
Surface changes in the brake disc friction surfaces at an advanced stage.
Minimum brake disc thickness is not retained due to wear (material erosion due to friction).