The Chelsea 680ZQDAX-A6XD or 680ZQDAXA6XD is an 8-bolt power take-off from the Chelsea 680 Series, designed for medium to heavy-duty manual transmission applications. The 680 Series is a common fit for Eaton Fuller transmissions and offers a deep-mount housing option for Mack applications. The cast iron housing and tapered cone bearings on the output shaft contribute to the series' high torque rating and long service life. The 680 Series is rated for intermittent torque in the 301-400 lb-ft range, with continuous operation available at a 30% de-rating. Output options across the 680 Series include SAE A, SAE B, and ISO 7652 pump flanges, as well as driveline configurations. Call us to confirm proper fit for your specific transmission and application.
Features
Chelsea 680 Series Power Take-Off, part number 680ZQDAX-A6XD or 680ZQDAXA6XD
8-bolt mounting for compatibility with common medium and heavy-duty manual transmission apertures
Cast iron housing with tapered cone bearings on the output shaft
Intermittent torque rating of 301-400 lb-ft; continuous operation supported with 30% de-rating
Deep-mount housing option available for Mack transmission applications
Series supports wire/cable and mechanical shift types; output options include SAE A, SAE B, ISO 7652 pump flanges, and driveline
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Shift Type: Wire/Cable or Mechanical
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Intermittent Torque: 301-400 lb-ft (series rating; confirm actual rating for this application)
- Continuous Operation: Yes, with 30% de-rating
- Output Power: 56+ HP / 51+ kW
- Housing Material: Cast Iron
- Bearing Type: Tapered Cone (output shaft); Tapered (input shaft)
Additional Information
The Chelsea 680 Series PTO is suited for higher-torque vocational applications including pneumatic blowers, aerial equipment, dump trucks, refuse trucks, fire and rescue, snow and ice removal, and service trucks. The space-saving air shift cover is designed to provide maximum clearance under the vehicle. The 680 Series features 32 output options across the product family, including Chelsea's 360-degree rotatable flange for flexible pump fitment, four internal speed ratios, and ten shift options. The NMFC classification for this part type is 128520 (Hydraulic PTOs, Pumps, Motors, etc.). Reference Parker documents: 680 Series Parts List HY25-2660-M1_US; 680 Series Sales Literature; 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.
