The Chelsea 680XRAHX-A3AZ or 680XRAHXA3AZ is a medium- to heavy-duty Power Take-Off from Chelsea's 680 Series, designed for transmissions with an 8-bolt PTO aperture. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft for extended service life under high-torque demand. A space-saving air shift cover maximizes clearance beneath the truck. The series is built for higher-torque applications such as pneumatic blowers and is compatible with Eaton Fuller, Volvo/Mack, and Daimler/Detroit transmission platforms, including a deep-mount housing option for Mack applications. Call us to confirm proper fit for your application.
Features
8-bolt mounting configuration for common medium- and heavy-duty transmission applications
Cast iron housing with tapered cone bearings on the output shaft
Air shift cover design saves space and maximizes underbody clearance
Built for higher-torque applications including pneumatic blowers
Deep mount housing option available for Mack transmission installations
Compatible with Eaton Fuller, Volvo/Mack, and Daimler/Detroit transmissions
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable or Mechanical (Air Shift cover)
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, or Driveline
- Series Intermittent Torque Rating: 301-400 lb-ft (check application pages for actual torque ratings)
- Continuous Operation: Yes, with 30% de-rating
- Output Power (series): 56+ HP / 51+ kW
- Shaft Power (series): 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Housing: Cast iron
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
The Chelsea 680 Series supports aerial, dump truck, refuse, fire and rescue, snow and ice removal, service truck, and blower/product pump applications. The series offers four internal speed ratios and ten shift options, with 32 total output configurations including Chelsea's 360-degree rotatable flange for flexible pump fitment. Relevant Chelsea documentation includes the 680 Series Parts List (HY25-2660-M1_US), the 680 Series Owner's Manual, and the Chelsea PTO General Information Catalog. Part number 680XRAHX-A3AZ is also referenced as SP680XRAHX-A3AZ.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
