The Chelsea 680 Series Power Take-Off, part number 680XHAHX-A3RB or 680XHAHXA3RB, is a medium- to heavy-duty PTO built for manual transmissions with an 8-bolt PTO aperture, including Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other compatible applications. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft, delivering intermittent torque ratings in the 301-400 lb-ft range, with a series reference rating of up to 375 lb-ft. Continuous operation is supported with a 30% de-rating. Shift options include wire/cable and mechanical configurations. Output options span SAE A, SAE B, ISO 7652 pump flanges, and driveline. Commonly specified for pneumatic blowers, dump trucks, aerial equipment, fire and rescue, snow and ice removal, and refuse applications. Call us to confirm proper fit for your transmission and application.
Features
8-bolt mounting pattern fits most manual transmission applications including Eaton/Fuller and Mack
Cast iron housing with tapered cone bearings on input and output shafts for high load capacity
Intermittent torque range 301-400 lb-ft; series reference up to 375 lb-ft (508 Nm)
Continuous operation supported with 30% de-rating
Shift options include wire/cable and mechanical
Output configurations include SAE A, SAE B, ISO 7652 pump flanges, and driveline; 360-degree rotatable flange available in series
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other 8-bolt aperture manual transmissions
- Intermittent Torque: 301-400 lb-ft (series range); up to 375 lb-ft / 508 Nm (series reference - verify application)
- Continuous Operation: Yes, with 30% de-rating
- Shift Type: Wire/Cable or Mechanical
- Output Types: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options (series): Round Shaft 1-1/4" - 5/16" Key; SAE A 5/8" - 9T Spline; SAE B 7/8" - 13T Spline; SAE BB 1" - 15T Spline; SAE C 1-1/4" - 14T Spline; 1410 Companion Flange
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP at 500 RPM; 71 HP at 1000 RPM; 107 HP at 1500 RPM
- Housing: Cast Iron
- Lubrication: Non-pressure lube (X designation in part number)
Additional Information
The Chelsea 680 Series is designed for higher-torque vocational applications including pneumatic blowers, aerial equipment, fire and rescue, dump trucks, refuse, and snow and ice removal. The space-saving air shift cover provides maximum clearance under the truck. A deep mount housing option is available within the series for Mack transmission applications. The 680 Series offers four internal speed ratios and ten shift options across the product family, making it adaptable to a wide range of installations. Reference documents for this series include the 680 Series Parts List (HY25-2660-M1_US) and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, available from Parker Chelsea. Part number 680XHAHX-A3RB is also referenced as SP680XHAHX-A3RB. Not sure this is the right PTO for your application? Give us a call.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
