The Chelsea 680 Series Power Take-Off 680GSAHX-A3AZ or 680GSAHXA3AZ is a medium- to heavy-duty PTO engineered for 8-bolt transmission apertures on Eaton/Fuller, Volvo, and Mack platforms. Wire/cable mechanical shift and a 1-1/4" round output shaft with key suit high-demand hydraulic and pneumatic blower installations. Output power reaches 56+ HP (51+ kW), with shaft power measured at 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. Intermittent torque is rated at 375 lb-ft (508 Nm) - verify against Chelsea application pages for your specific configuration. A deep-mount housing option accommodates Mack transmission applications. Call us to confirm proper fit for your transmission before ordering.
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on the output shaft for high load capacity and extended service life. The input shaft also uses tapered bearings rather than needle bearings, improving load-bearing capability under sustained operation. The series supports continuous operation with a 30% de-rating applied. Typical applications include aerial equipment, dump trucks, refuse trucks, service vehicles, fire and rescue units, snow and ice removal equipment, and pneumatic blower and product pump installations.
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) - check application pages for your configuration
Shaft power: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
Deep-mount housing option for Mack transmission applications
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable, Mechanical
- Output Shaft Type: 1-1/4" Round, 1-1/4" Round with Key
- Intermittent Torque: 375 lb-ft / 508 Nm (Check Application Pages for Actual Torque Ratings)
- 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)
- Transmission Manufacturer Compatibility: Eaton/Fuller, Volvo/Mack, Other
Additional Information
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on the output shaft for high load capacity and extended service life. The input shaft also uses tapered bearings rather than needle bearings, improving load-bearing capability under sustained operation. The series supports continuous operation with a 30% de-rating applied. Typical applications include aerial equipment, dump trucks, refuse trucks, service vehicles, fire and rescue units, snow and ice removal equipment, and pneumatic blower and product pump installations.
