The Chelsea 680 Series Power Take-Off Assembly, part number 680GFAHX-A3GF or 680GFAHXA3GF, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures. It operates with a wire/cable mechanical shift and delivers an intermittent torque rating of 375 lb-ft (508 Nm) - check application pages for actual torque ratings for your specific setup. The 1-1/4" round output shaft with key accommodates high-demand driven equipment. Shaft power output reaches 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. The deep-mount housing option makes this a fit for Mack transmission applications, and the cast iron housing with tapered cone bearings on the output shaft contributes to its torque capacity and service life. Compatible with Eaton/Fuller and Volvo/Mack transmissions. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
8-bolt mounting type for broad manual transmission coverage
Wire/cable mechanical shift type
Intermittent torque rating: 375 lb-ft / 508 Nm (verify on application pages for your specific transmission)
Output shaft: 1-1/4" round with key
Shaft power: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
Deep-mount housing option available for Mack transmission applications
Tech Specs
- Intermittent Torque: 375 lb-ft / 508 Nm (Check Application Pages for Actual Torque Ratings)
- 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, 1-1/4" Round with Key
- Mounting Type: 8-Bolt
- Shaft Power: 36 HP (500 RPM), 71 HP (1,000 RPM), 107 HP (1,500 RPM) / 27 kW (500 RPM), 53 kW (1,000 RPM), 80 kW (1,500 RPM)
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
