The Chelsea 680QHMEX-56RY is an 8-bolt Power Take-Off from the Chelsea 680 Series, built for medium to heavy duty manual transmission applications. The cast iron housing and tapered cone output shaft bearings support intermittent torque in the 301-400 lb-ft range, making the 680 Series a go-to choice for pneumatic blowers, dump trucks, aerial equipment, and refuse applications. Output options within the series include SAE A and SAE B pump flanges as well as driveline outputs. Shift is accomplished via wire/cable or mechanical means. The space-saving air shift cover design maximizes clearance under the truck, and the series includes a deep mount housing option suited to Mack transmission applications. 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 the output shaft for durability in high-torque use
Intermittent torque rating in the 301-400 lb-ft range; suited to pneumatic blowers and high-demand vocational equipment
SAE A and SAE B pump flange output options, plus driveline output, within the 680 Series
Wire/cable or mechanical shift; space-saving shift cover maximizes underbody clearance
Deep mount housing option available for Mack transmission applications
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
- Output Shaft Options (series): Round Shaft (1-1/4" - 5/16" Key), SAE A (5/8" - 9T) Pump Spline, SAE B (7/8" - 13T) Pump Spline, SAE BB (1" - 15T) Pump Spline, SAE C (1-1/4" - 14T) Pump Spline
- Intermittent Torque (series): 301-400 lb-ft (508 Nm; verify actual rating on application page)
- Continuous Operation: Yes, with 30% de-rating
- Output Power (series): 56+ HP / 51+ kW
- Lubricant: Pressure Lube or No Pressure Lube (see part number suffix)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other 8-bolt aperture transmissions
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
