The Chelsea 680DQMBX-56XD or 680DQMBX56XD is an 8-bolt power take-off from the Chelsea 680 Series, designed for medium to heavy-duty manual transmission applications including Eaton Fuller, Volvo/Mack, and Daimler/Detroit gearboxes. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing capability under high-torque demand. This series supports output power of 56+ HP and is rated for intermittent torque in the 301-400 lb-ft range, with continuous operation available at a 30% de-rating. The space-saving air shift cover maximizes clearance under the truck. Common applications include pneumatic blowers, dump trucks, aerial units, refuse vehicles, fire and rescue, and snow and ice removal equipment. Call us to confirm proper fit for your transmission and application.
Features
Chelsea 680 Series 8-bolt power take-off
Cast iron housing with tapered cone bearings on the output shaft
Intermittent torque rating: 301-400 lb-ft; continuous operation with 30% de-rating
Output power: 56+ HP (51+ kW)
Compatible with Eaton/Fuller, Volvo/Mack, and Daimler/Detroit manual transmissions
Applications include pneumatic blowers, dump trucks, aerial, refuse, and fire/rescue equipment
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit manual transmissions
- Intermittent Torque: 301-400 lb-ft (501+ Nm); check application pages for actual rating
- 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
- Shift Type: Wire/Cable or Mechanical
- Housing: Cast iron
- Output Shaft Bearing: Tapered cone bearings
- Lubricant Type: X = No Pressure Lube (per part number decode)
- Available Output Types: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
Additional Information
The Chelsea 680 Series is covered by Parker documentation including the 680 Series Owner's Manual (shared with 340/348/442/447/489/660/823/863/880 Series), the 680 Series Parts List (HY25-2660-M1_US), and 680 Series Sales Literature. A Detroit DT12 Adapter Owner's Manual is also available for compatible 680 Series configurations. Contact Pro Gear and Transmission if you need help identifying the correct documentation or confirming fitment for your specific transmission model.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
