The Chelsea 680 Series Power Take-Off Assembly, part number 680ZFDAX-A6XD or 680ZFDAXA6XD, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures on Eaton/Fuller, Volvo/Mack, and other compatible transmissions. Wire/cable mechanical shift and a 1-1/4" round output shaft with keyway suit demanding vocational work. Intermittent torque rating for the 680 Series reaches 375 lb-ft (508 Nm) - check application pages for actual torque ratings specific to your installation. Output power exceeds 56 HP (51 kW), with shaft power scaling from 36 HP at 500 RPM up to 107 HP at 1,500 RPM. The deep-mount housing option covers Mack transmission applications, and the cast iron housing with tapered cone bearings on the output shaft supports high-torque work such as pneumatic blowers. Call us to confirm proper fit for your application.
The Chelsea 680 Series is suited for a wide range of vocational markets including aerial, dump truck, refuse, fire and rescue, snow and ice removal, service trucks, and blower and product pump applications. The 680 Series supports continuous operation with a 30% de-rating. The 680 Series Parts List reference is HY25-2660-M1_US.
Features
Chelsea 680 Series, part number 680ZFDAX-A6XD or 680ZFDAXA6XD
8-bolt mounting type for broad compatibility across manual transmissions with 8-bolt apertures
Wire/cable mechanical shift type
1-1/4" round output shaft with keyway
Intermittent torque rating of 375 lb-ft (508 Nm) - verify actual rating on application pages
Shaft power: 36 HP (500 RPM), 71 HP (1,000 RPM), 107 HP (1,500 RPM)
Deep-mount housing option for Mack transmission applications; cast iron housing with tapered cone bearings
Tech Specs
- Intermittent Torque: 375 lb-ft / 508 Nm (check application pages for actual torque ratings for your installation)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 56+ HP / 51+ kW
- Compatible Transmission Manufacturers: Eaton/Fuller, Volvo/Mack, Other
- Output Shaft Type: 1-1/4" Round, 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)
Additional Information
The Chelsea 680 Series is suited for a wide range of vocational markets including aerial, dump truck, refuse, fire and rescue, snow and ice removal, service trucks, and blower and product pump applications. The 680 Series supports continuous operation with a 30% de-rating. The 680 Series Parts List reference is HY25-2660-M1_US.
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
