The Chelsea 680QFMEX-66RF is an 8-bolt Power Take-Off from Chelsea's 680 Series, engineered for medium to heavy duty manual transmission applications. The cast iron housing and tapered cone bearings on the output shaft give the 680 Series a strong intermittent torque rating of up to 375 lb-ft (508 Nm). The 680 Series covers Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other transmissions with 8-bolt PTO apertures, including a deep mount housing option for Mack applications. Output options within the series span SAE A, SAE B, and driveline configurations. Continuous operation is supported with a 30% de-rating. A genuine Chelsea part, sold by Pro Gear and Transmission.
Features
8-bolt mounting for broad manual transmission coverage including Eaton/Fuller, Volvo/Mack, and Daimler/Detroit
Cast iron housing with tapered cone bearings on input and output shafts for long service life
Intermittent torque rating up to 375 lb-ft (508 Nm) at the series level
Continuous operation supported with 30% de-rating
Deep mount housing option available for Mack transmission applications
Suited for aerial, dump truck, refuse, fire and rescue, blower, and service truck vocations
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, Other
- Intermittent Torque (Series): 375 lb-ft (508 Nm) - check application pages for actual rating
- 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
- Housing Material: Cast Iron
- Lubricant Type: X = No Pressure Lube (per part number suffix)
- Series Output Power: 56+ HP / 51+ kW
Additional Information
The Chelsea 680 Series is documented in 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. A Detroit DT12 Adapter Owner's Manual is also available for 680 Series installations. Contact Pro Gear and Transmission to locate the correct manual or parts list for your application.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
