Description
The Chelsea 680 Series Power Take-Off, part number 680GFAHX-A3AZ or 680GFAHXA3AZ, is a medium- to heavy-duty PTO built around an 8-bolt mounting configuration. It uses a wire/cable mechanical shift and delivers a 1-1/4″ round output shaft with keyway. Intermittent torque ratings reach up to 375 lb-ft (508 Nm) — verify actual ratings on the Chelsea application pages for your specific installation. Shaft power output is 36 HP at 500 RPM, 71 HP at 1000 RPM, and 107 HP at 1500 RPM. The 680 Series features a cast iron housing with tapered cone bearings on both the output shaft and input shaft, designed for higher-torque demands such as pneumatic blowers. A deep-mount housing option covers Mack transmission installations. Compatible with Eaton/Fuller and Volvo/Mack transmissions featuring an 8-bolt PTO aperture. Call us to confirm the correct configuration for your application.
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 keyway
Intermittent torque up to 375 lb-ft (508 Nm) — confirm actual rating on Chelsea application pages
Shaft power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 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)
- 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 with Key
- Mounting Type: 8-Bolt
- Shaft Power: 36 HP (500 RPM), 71 HP (1000 RPM), 107 HP (1500 RPM) / 27 kW (500 RPM), 53 kW (1000 RPM), 80 kW (1500 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.
