The Chelsea 680QHMEX-66AF is an 8-bolt Power Take-Off unit from the Chelsea 680 Series, a medium- to heavy-duty PTO line engineered for Eaton Fuller transmissions and compatible with Volvo/Mack, Daimler/Detroit, and other transmission manufacturers. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft for extended service life under demanding, higher-torque applications such as pneumatic blowers. Shift options include wire/cable and mechanical types. Output configurations span SAE A and SAE B pump flanges, ISO 7652 pump flange, and driveline arrangements, with Chelsea's 360-degree rotatable flange available for precise pump fitment. A deep mount housing option supports Mack transmission applications. Available from Pro Gear and Transmission.
Features
8-bolt mounting pattern for broad manual transmission coverage
Cast iron housing with tapered cone bearings on the output and input shafts
Wire/cable and mechanical shift options
Compatible output types: SAE A pump flange, SAE B pump flange, ISO 7652 pump flange, and driveline
Deep mount housing option available for Mack transmission applications
Suited for higher-torque vocational applications including pneumatic blowers, aerial, dump truck, refuse, and fire and rescue
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, Other
- Shift Type: Wire/Cable, Mechanical
- Output Types: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Continuous Operation: Yes, with 30% de-rating
- Series Intermittent Torque Range: 301-400 lb-ft (508 Nm) - check application pages for actual torque rating
- Series Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Housing Material: Cast Iron
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
