Description
The Chelsea 680 Series Power Take-Off Assembly, part number 680XQAHX-P3XD or 680XQAHXP3XD, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures. This unit uses wire/cable mechanical shift and delivers a 1-1/4″ round output shaft with key. Intermittent torque is rated at 375 lb-ft (508 Nm) – check the Chelsea application pages for your specific installation. Output power exceeds 56 HP (51 kW), with shaft power reaching 107 HP at 1,500 RPM. A deep-mount housing option accommodates Mack transmission applications, and the cast iron housing with tapered cone bearings on the output shaft is suited for higher-torque work such as driving pneumatic blowers. Available from Pro Gear and Transmission.
Features
8-Bolt mounting fits most manual transmissions with an 8-bolt PTO aperture
Wire/cable mechanical shift type
1-1/4″ round output shaft with key
Intermittent torque rated at 375 lb-ft (508 Nm) – verify via Chelsea application pages for your specific setup
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 Chelsea application pages for actual torque ratings for your application)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 56+ HP / 51+ kW
- 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)
- Output Shaft Type: 1-1/4″ Round with Key
- Mounting Type: 8-Bolt
- Transmission Fitment: Eaton/Fuller, Volvo/Mack, Other







