Wilwood Combination Park Brake - Brake Caliper - Left Hand - Red / Black

Wilwood's Combination Parking Brake (CPB) Hydra-Mechanical Caliper uses hydraulic pressure for sto...

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Product Information

Full details

The Wilwood Combination Parking Brake (CPB) Hydra-Mechanical Caliper is an essential upgrade for automotive enthusiasts performing rear disc brake conversions on axles that lack space for traditional internal shoe systems. By integrating both hydraulic service braking and a mechanical parking brake into one compact, floating-mount unit, it delivers reliable stopping power and parking security. While this caliper offers excellent flexibility for custom setups, users must note that it does not include brake pads, requiring a separate purchase to complete the installation.

All features

Model Part Number120-9809-RD
BrandWilwood

Extended Product Information

FAQs

Are brake pads included with this caliper?

No, brake pads must be purchased separately based on your specific pad compound requirements.

What rotor thickness is this caliper designed for?

This unit is specifically designed for 0.81-inch wide rotors.

Does this work with my stock parking brake cables?

It is compatible with 1/2-inch housing ends and 1/8 to 9/64-inch cables; modifications to your stock cables may be necessary depending on your vehicle.

Can I use this on a front axle?

This unit is designed specifically for rear axle applications that require a parking brake mechanism.

What is the benefit of the radial mount?

The radial mount allows for fine-tuned radial adjustment, making it much easier to achieve perfect alignment on custom-built axle brackets.

Troubleshooting

Parking brake does not hold the vehicle securely.

Adjust the mechanical cable tension at the lever or cable adjuster to remove slack, ensuring the caliper arm reaches its full travel.

Uneven or accelerated pad wear.

Check that the floating pins are sliding freely and not obstructed by debris; ensure the caliper is perfectly parallel to the rotor.

Soft brake pedal feel.

Verify that all air has been bled from the hydraulic system and ensure the caliper is mounted rigidly enough to prevent flex.

Pros and Cons

Pros

  • Integrated mechanical parking brake saves significant space.
  • Floating design ensures consistent contact on axles with side play.
  • Flexible radial mounting allows for precise caliper-to-rotor alignment.
  • Compatible with a wide range of rotor diameters (11-13 inches).
  • High-quality construction from a trusted industry leader.

Cons

  • Brake pads are not included with the unit.
  • Requires custom bracket fabrication for some non-standard applications.
  • Professional installation and setup recommended for safety-critical braking components.

Setup, Compatibility & Care

To ensure peak performance, follow these guidelines for integration:

  1. Compatibility: Verify your rotor width is exactly 0.81 inches, as this unit is specific to this dimension.
  2. Rotor Sizing: Ensure your disc setup falls within the 11-inch to 13-inch diameter range.
  3. Cable Routing: When connecting the mechanical arm, ensure the cable has a straight pull path to prevent premature wear on the cable housing.
  4. Maintenance: Regularly inspect the mechanical linkage for debris and ensure the sliding pins on the floating mount are clean and lightly lubricated with high-temperature brake grease to prevent binding.
  5. Fluid System: Always perform a complete system bleed after installation to remove trapped air from the hydraulic circuit.

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