The Chelsea 680 Series Power Take-Off Assembly, part number 680ZFDAX-A3AF or 680ZFDAXA3AF, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures. This unit uses a wire/cable mechanical shift and delivers a 1-1/4" round output shaft with keyway. Intermittent torque capacity reaches 375 lb-ft (508 Nm), verify actual rating 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. Compatible with Eaton/Fuller and Volvo/Mack transmissions, including a deep-mount housing option for Mack applications. Designed for high-torque demands like pneumatic blowers. A genuine Chelsea part sold by Pro Gear and Transmission. 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 long service life under high-torque conditions. The input shaft also uses tapered bearings rather than needle bearings for greater load-bearing capability. The series offers 32 output options -- including Chelsea's 360-degree rotatable flange -- and four internal speed ratios, giving this PTO broad versatility across aerial, refuse, dump truck, fire and rescue, and blower/product pump applications.
Features
Chelsea 680 Series PTO, part number 680ZFDAX-A3AF or 680ZFDAXA3AF
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) -- see Chelsea application pages for actual rating
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
Suited for high-torque vocational uses including pneumatic blowers
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
- Output Shaft Type: 1-1/4" Round with Key
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Other
- 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)
Additional Information
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on the output shaft for long service life under high-torque conditions. The input shaft also uses tapered bearings rather than needle bearings for greater load-bearing capability. The series offers 32 output options -- including Chelsea's 360-degree rotatable flange -- and four internal speed ratios, giving this PTO broad versatility across aerial, refuse, dump truck, fire and rescue, and blower/product pump applications.
