The Chelsea 680 Series Power Take-Off Assembly, part number 680GSAHX-P3AZ or 680GSAHXP3AZ, is a medium to heavy duty PTO built for 8-bolt transmission apertures. 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. The part number suffix decodes to an air shift configuration with a pressure-lubricated gearset. This series covers Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other transmission applications, including a deep mount housing option suited for Mack installations. Vocational uses span dump trucks, aerial equipment, fire and rescue, refuse, and snow removal. Call us to confirm proper fit for your specific transmission.
Features
8-bolt mounting configuration for broad transmission coverage
Air shift engagement with pressure lube gearset
Cast iron housing with tapered cone bearings on the output shaft
Suited for higher torque applications including pneumatic blowers
Deep mount housing option available for Mack transmission applications
Compatible with Eaton/Fuller, Volvo/Mack, and Daimler/Detroit transmissions
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Air Shift (Wire/Cable or Mechanical options available in series)
- Lubricant: Pressure Lube
- Housing: Cast Iron
- Output Bearing: Tapered Cone Bearings
- Intermittent Torque: 301-400 lb-ft (check application pages for actual rating)
- 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, Other
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
The Chelsea 680 Series is catalogued under NMFC Code 128520 for hydraulic PTOs, pumps, and motors. Parker Chelsea documents applicable to this series include the 680 Series Parts List (HY25-2660-M1_US), the 680 Series Sales Literature, the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, and the Detroit DT12 Adapter Owner's Manual for 238/489/680/826/880 Series. Common applications for 680 Series PTOs include aerial equipment, dump trucks, fire and rescue vehicles, refuse trucks, service trucks, and snow and ice removal equipment.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
