The Chelsea 680 Series Power Take-Off Assembly, part number 680ZQDAX-V5XY or 680ZQDAXV5XY, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures on Eaton/Fuller, Volvo/Mack, and other compatible transmissions. It uses a wire/cable mechanical shift and delivers a 1-1/4" round output shaft with keyway. Intermittent torque is rated at 375 lb-ft (508 Nm) -- verify actual ratings on the application pages for your specific setup. Output power exceeds 56 HP, with shaft power of 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. The cast iron housing and tapered cone bearings on the output shaft contribute to its load-bearing strength, and the deep-mount housing option supports Mack transmission installations. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.

The Chelsea 680 Series is suited for vocational applications including aerial equipment, dump trucks, refuse vehicles, fire and rescue, snow and ice removal, and blower and product pump installations. Four internal speed ratios and ten shift options are available across the 680 Series, along with 32 output configurations including Chelsea's 360-degree rotatable flange for flexible pump fitment.
Features
8-bolt mounting configuration covers a wide range of manual transmission applications
Wire/cable mechanical shift type
1-1/4" round output shaft with keyway
Intermittent torque rating of 375 lb-ft (508 Nm) -- see application pages for verified torque values
Deep-mount housing option available for Mack transmission applications
Shaft power output: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
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 (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)
Additional Information

The Chelsea 680 Series is suited for vocational applications including aerial equipment, dump trucks, refuse vehicles, fire and rescue, snow and ice removal, and blower and product pump installations. Four internal speed ratios and ten shift options are available across the 680 Series, along with 32 output configurations including Chelsea's 360-degree rotatable flange for flexible pump fitment.
