The Chelsea 680 Series Power Take-Off Assembly, part number 680KQAHX-A3XD or 680KQAHXA3XD, is a medium- to heavy-duty PTO built around an 8-bolt mounting configuration and wire/cable mechanical shift. The cast iron housing and tapered cone bearings on the output shaft deliver an intermittent torque rating in the 301-400 lb-ft (501+ Nm) range, with a series-published reference figure of 375 lb-ft (508 Nm) -- verify actual rating on the Chelsea application pages for your specific installation. Output shaft is a 1-1/4" round with key. Shaft power at 1,000 RPM reaches 71 HP (53 kW), scaling to 107 HP (80 kW) at 1,500 RPM. Compatible with Eaton/Fuller and Volvo/Mack transmissions featuring 8-bolt PTO apertures; the deep-mount housing option supports Mack applications. Commonly specified for pneumatic blowers, dump trucks, refuse, and aerial equipment. Call us to confirm proper fit for your application.
Features
8-bolt mounting for broad coverage of manual transmission applications from Eaton/Fuller and Volvo/Mack
Wire/cable mechanical shift with space-saving air shift cover for maximum clearance under the truck
1-1/4" round output shaft with key; series also offers SAE pump flange and driveline output options
Intermittent torque rating 301-400 lb-ft (501+ Nm); consult Chelsea application pages for actual torque ratings
Tapered cone bearings on output shaft and tapered input shaft bearings for higher load capacity than needle-bearing designs
Deep-mount housing option available for Mack transmission applications; suited for pneumatic blowers, aerial, and refuse equipment
Tech Specs
- Intermittent Torque: 301-400 lb-ft (501+ Nm); reference rating 375 lb-ft / 508 Nm - check application pages for actual torque rating
- Shift Type: Wire/Cable, Mechanical
- Output Power: 56+ HP (51+ kW)
- Transmission Manufacturer Compatibility: Eaton/Fuller, Volvo/Mack, Other
- Output Shaft Type: 1-1/4" Round with Key
- Mounting Type: 8-Bolt
- Shaft Power: 36 HP / 27 kW at 500 RPM; 71 HP / 53 kW at 1,000 RPM; 107 HP / 80 kW at 1,500 RPM
- Continuous Operation: Yes, with 30% de-rating
Additional Information
