The Chelsea 680 Series Power Take-Off Assembly, part number 680GSAHX-A3XD or 680GSAHXA3XD, is built for medium- to heavy-duty applications where high torque output is essential. This unit mounts to 8-bolt PTO apertures and is compatible with Eaton/Fuller, Volvo/Mack, and other transmission manufacturers. The wire/cable mechanical shift type and 1-1/4" round output shaft with key suit a wide range of installations. Intermittent torque rating for the 680 Series reaches 375 lb-ft (508 Nm); verify your specific application on the Chelsea application pages. Output shaft power reaches 71 HP at 1,000 RPM and 107 HP at 1,500 RPM. The deep mount housing design accommodates Mack transmission applications. Common vocational uses include pneumatic blowers, dump trucks, refuse bodies, and aerial equipment. Call us to confirm proper fit for your application.
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on the output shaft for increased load capacity compared to needle bearing designs. The input shaft also uses tapered bearings. The series offers 32 output options including Chelsea's 360-degree rotatable flange, four internal speed ratios, and ten shift options. Typical applications include aerial equipment, snow and ice removal, fire and rescue, dump trucks, refuse vehicles, and pneumatic blower systems. Refer to the 680 Series Parts List (HY25-2660-M1_US) and the 680 Series Sales Literature for detailed application and fitment guidance.
Features
Chelsea 680 Series PTO, part number 680GSAHX-A3XD or 680GSAHXA3XD
8-bolt mounting type for broad manual transmission coverage including Eaton/Fuller and Volvo/Mack
Wire/cable mechanical shift type
1-1/4" round output shaft with key
Intermittent torque up to 375 lb-ft (508 Nm); check Chelsea application pages for your specific rating
Shaft power: 36 HP (500 RPM), 71 HP (1,000 RPM), 107 HP (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 with Key
- Mounting Type: 8-Bolt
- Shaft Power: 36 HP / 27 kW (500 RPM), 71 HP / 53 kW (1,000 RPM), 107 HP / 80 kW (1,500 RPM)
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on the output shaft for increased load capacity compared to needle bearing designs. The input shaft also uses tapered bearings. The series offers 32 output options including Chelsea's 360-degree rotatable flange, four internal speed ratios, and ten shift options. Typical applications include aerial equipment, snow and ice removal, fire and rescue, dump trucks, refuse vehicles, and pneumatic blower systems. Refer to the 680 Series Parts List (HY25-2660-M1_US) and the 680 Series Sales Literature for detailed application and fitment guidance.
