The Chelsea 680 Series Power Take-Off, part number 680XRAHX-H3XD or 680XRAHXH3XD, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures. The 680 Series features a cast iron housing with tapered cone bearings on both the input and output shafts, a design that supports higher-torque applications including pneumatic blowers, dump trucks, aerial units, and refuse equipment. The series covers Eaton/Fuller, Volvo/Mack, and Daimler/Detroit transmission families, and includes a deep-mount housing option engineered for Mack applications. A space-saving air shift cover maximizes clearance under the truck. Call us to confirm proper fit for your specific transmission and output configuration.
Features
8-bolt mounting pattern covers most manual transmission applications in medium- to heavy-duty service
Cast iron housing with tapered cone bearings on input and output shafts for high torque capability
Series intermittent torque rating: 375 lb-ft (508 Nm); continuous operation supported with 30% de-rating
Deep-mount housing option available for Mack transmission applications
Output options include SAE A, SAE B, SAE BB, and SAE C pump flanges, plus driveline output
Shift options include wire/cable and mechanical; air shift cover designed for maximum undercab clearance
Tech Specs
- Mounting Type: 8-Bolt
- Series: Chelsea 680 Series
- Shift Type: Wire/Cable or Mechanical (air shift cover included)
- Output Options: SAE A Pump Flange, SAE B Pump Flange, SAE BB Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: Round Shaft (1-1/4" - 5/16" Key), SAE A (5/8" - 9T), SAE B (7/8" - 13T), SAE BB (1" - 15T), SAE C (1-1/4" - 14T), DIN 5462 Pump Spline, 1410 Companion Flange
- Intermittent Torque: 375 lb-ft (508 Nm) - verify on application pages
- Continuous Operation: Yes, with 30% de-rating
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Lubrication: Pressure Lube or No Pressure Lube (application-dependent)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Housing: Cast iron with tapered cone bearings
