The Chelsea 680QHMEX-66RY is an 8-bolt Power Take-Off from the Chelsea 680 Series, built for medium- to heavy-duty manual transmission applications. The 680 Series is engineered for higher-torque work such as pneumatic blowers, featuring a cast iron housing and tapered cone bearings on both the input and output shafts for strong load-bearing capacity and long service life. Output options across the 680 Series include SAE A and SAE B pump flanges and driveline configurations. The space-saving air shift cover maximizes clearance under the vehicle. Common transmission fitments across the series include Eaton/Fuller and Volvo/Mack platforms with 8-bolt PTO apertures, with a deep-mount housing option available for Mack applications.
Features
8-bolt mounting configuration for medium- and heavy-duty manual transmissions
Cast iron housing with tapered cone bearings on input and output shafts
Designed for higher-torque applications including pneumatic blowers
Series supports SAE A, SAE B, and ISO 7652 pump flange output types as well as driveline output
Wire/cable and mechanical shift options available across the 680 Series
Deep-mount housing option covers Mack transmission applications
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable or Mechanical (series options)
- Output Types: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: 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, 1410 Companion Flange
- Intermittent Torque (Series): 375 lb-ft (508 Nm) - Check application pages for actual torque ratings
- 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
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Housing: Cast iron
Additional Information
The Chelsea 680 Series is suited for vocational applications including aerial, dump truck, refuse, fire and rescue, snow and ice removal, service trucks, and blower and product pump systems. The series features 360-degree rotatable flange output options for flexible pump mounting, four internal speed ratios, and ten shift configurations. A Detroit DT12 adapter option is also available across the 238/489/680/826/880 Series. Reference documents include the 680 Series Owner's Manual, 680 Series Parts List (HY25-2660-M1_US), and the Chelsea PTO General Information Catalog.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
