The Chelsea 680QFMEX-56RK is an 8-bolt Power Take-Off from the Chelsea 680 Series, designed for medium to heavy duty manual transmission applications. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft, and the input shaft uses tapered bearings rather than needle bearings for greater load-bearing capability. Output options include SAE A, SAE B, and ISO 7652 pump flanges as well as driveline configurations. The series supports wire/cable and mechanical shift types and is rated for intermittent torque up to 375 lb-ft (508 Nm), with continuous operation available at a 30% de-rating. The compact air shift cover is designed to maximize clearance under the truck. Common applications include aerial work, dump trucks, refuse vehicles, snow and ice removal, fire and rescue, and blower and product pump service. A genuine Chelsea part, available from Pro Gear and Transmission.
Features
8-bolt mounting for Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other manual transmission applications
Cast iron housing with tapered cone bearings on output shaft for extended service life
Input shaft uses tapered bearings instead of needle bearings for greater load capacity
Intermittent torque rating: 375 lb-ft (508 Nm); continuous operation with 30% de-rating
Output options include SAE A, SAE B, ISO 7652 pump flanges, and driveline
Space-saving air shift cover maximizes underbody clearance
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable or Mechanical
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Intermittent Torque: 375 lb-ft (508 Nm)
- 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
- Housing Material: Cast Iron
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other 8-bolt aperture transmissions
- Deep Mount Housing Option: Available for Mack transmission applications
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
