Challenge Gearbox O Ring Seal

Challenge Gearbox O Ring Seal

This product is a replacement 7/16 inch O-ring for the Challenge Model 08 series gearbox, an older but common gearbox model also known as the SKK gearbox. It is used to create a seal between the input housing and the main gearbox housing, preventing fluid leaks and contamination of internal components. This specific o-ring is a critical component for servicing or rebuilding the 12-bolt and 24-bolt versions of the Challenge 08 gearbox.

Key Features

• Specifically designed for Challenge Model 08 / SKK gearboxes.
• 7/16 inch size variant.
• Seals the connection between the input and main gearbox housings.
• Compatible with both 12-bolt and 24-bolt gearbox versions.

Fits These Mixers

ZF, Rex, PMP, Challenge, Bonfiglioli. Fits Challenge Cook Brothers (CCB) / SKK Model 08 concrete mixer gearboxes, including both 12-bolt and 24-bolt configurations. This gearbox was used on mixers from manufacturers like Challenge, TL Smith, and Advance.

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.