Challenge Cook Brothers 08 Gearbox Groove Pin

Challenge Cook Brothers 08 Gearbox Groove Pin

This groove pin is a critical fastening and alignment component used in the input shaft assembly of concrete mixer gearboxes. It provides a secure, friction-fit connection to maintain proper alignment of the bearing retainer and input shaft components under high-torque conditions. Specifically designed for the Challenge Model 08 (12-bolt) gearbox, it is also compatible with select ZF mixer gearboxes including the PK-6500 and P-5300 models. Replacing worn or sheared groove pins during gearbox rebuilds is essential to prevent component shifting and ensure long-term reliability of the mixer drum drive system.

Key Features

• Longitudinal grooves provide a secure, vibration-resistant friction fit
• Direct replacement for Challenge Model 08 (12-bolt) mixer gearboxes
• Compatible with ZF PK-6500 and P-5300 series gearboxes
• Secures and aligns the input shaft and bearing retainer assembly

Fits These Mixers

ZF, Rex, PMP, Challenge, Bonfiglioli. Fits Challenge Cook Brothers Model 08 (12-Bolt) mixer gearboxes. Also compatible with ZF PK-6500 and P-5300 concrete mixer gearboxes. Located in the input shaft and bearing retainer assembly.

All measurements ± standard manufacturing tolerance.

Product descriptions are drafted with automated tools and reviewed as time allows. While we work to keep them accurate, specifications and fitment should be confirmed with a Customer Service specialist at 800-745-3414 before purchase. Found an error? Let us know and we’ll fix it.