The Chelsea 680 Series Power Take-Off, part number 680GQAHX-P3AF or 680GQAHXP3AF, is a medium- to heavy-duty PTO built for 8-bolt transmission openings on Eaton/Fuller, Volvo/Mack, and other compatible transmissions. It shifts via wire/cable mechanical actuation and delivers output through a 1-1/4" round shaft with keyway. The 680 Series is engineered for higher-torque applications including pneumatic blowers, dump trucks, and refuse equipment. A deep-mount housing option accommodates Mack transmission installations. Shaft power runs 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. Call us to confirm proper fit for your specific transmission and application.
Features
8-bolt mounting for broad coverage across compatible manual transmission applications
Wire/cable mechanical shift actuation
1-1/4" round output shaft with keyway
Deep-mount housing option for Mack transmission fitment
Designed for high-torque demands including pneumatic blowers, refuse, and dump truck equipment
Shaft power output: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
Tech Specs
- Intermittent Torque: 301-400 lb-ft (501+ Nm); 375 lb-ft / 508 Nm (check application pages for actual torque ratings)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 56+ HP (51+ kW)
- Transmission 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 / 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
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
