The Chelsea 680 Series Power Take-Off, part number 680DFMCX-56RK or 680DFMCX56RK, is a medium- to heavy-duty PTO built for manual transmission applications with an 8-bolt PTO aperture. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft, designed to handle higher-torque demands such as pneumatic blower drives. A deep mount housing option supports Mack transmission fitment, while the space-saving air shift cover maximizes undercarriage clearance. The series offers wire/cable and mechanical shift types. Compatible transmission manufacturers include Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and others. Call us to confirm proper fit for your specific transmission and application.
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 the output shaft for extended service life
Deep mount housing option available for Mack transmission applications
Wire/cable or mechanical shift types supported
Designed for higher-torque applications including pneumatic blowers
Space-saving shift cover design for maximum undercarriage clearance
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable or Mechanical
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, Other
- Housing Material: Cast Iron
- Output Shaft Bearing Type: Tapered Cone
- Lubricant Type: X = No Pressure Lube
- Intermittent Torque Rating: 301-400 lb-ft (check application pages for actual torque rating)
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Continuous Operation: Yes, with 30% de-rating
Additional Information
Parts manual and diagrams: Chelsea 680 Series PTO parts list with prices
