4650TW Technical data/brake wear limits

WM 4650TW Technical data/brake wear limits

Technical values





















Technical values

Technical data - 19-inch brake system (Turbo)





PCCB brake system (Turbo)





Test values and wear limits

Test values and wear limits for 18-inch brake system (V6/V6 Diesel/V6 China)

Information

Depending on the extent of wear on cast iron brake discs, two condition criteria can make replacement necessary:

- Formation of cracks at advanced stage on the brake disc friction surfaces.

- Minimum brake disc thickness is not retained due to wear (material erosion due to friction). -> 46500200 Checking front brake discs (wear assessment)-> 46530250 Checking rear brake discs (wear assessment)





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.
- 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. For a list of recommended disc brake dressing machines, see Tools and Equipment.
- The brake disc must only be reworked symmetrically, i.e. equally from both sides! Observe the operating instructions for the disc brake dressing machine!

Test values and wear limits for 18-inch brake system (V8S/Hybrid)

Information

Depending on the extent of wear on cast iron brake discs, two condition criteria can make replacement necessary:

- Formation of cracks at advanced stage on the brake disc friction surfaces.

- Minimum brake disc thickness is not retained due to wear (material erosion due to friction). -> 46500200 Checking front brake discs (wear assessment)-> 46530250 Checking rear brake discs (wear assessment)





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.
- 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. For a list of recommended disc brake dressing machines, see Tools and Equipment.
- The brake disc must only be reworked symmetrically, i.e. equally from both sides! Observe the operating instructions for the disc brake dressing machine!

Test values and wear limits for 19-inch brake system (Turbo)

Information

Depending on the extent of wear on cast iron brake discs, two condition criteria can make replacement necessary:

- Formation of cracks at advanced stage on the brake disc friction surfaces.

- Minimum brake disc thickness is not retained due to wear (material erosion due to friction). -> 46500200 Checking front brake discs (wear assessment)-> 46530250 Checking rear brake discs (wear assessment)





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.
- 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. For a list of recommended disc brake dressing machines, see Tools and Equipment.
- The brake disc must only be reworked symmetrically, i.e. equally from both sides! Observe the operating instructions for the disc brake dressing machine!

Test values and wear limits for PCCB (Turbo)

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).

Information

The PCCB brake disc must not be machined.





Possible complaints
- Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.

Procedure
- Check brake disc for minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.