The Chelsea 680 Series Power Take-Off, part number 680XSDAX-A5RF or 680XSDAXA5RF, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures. It uses a wire/cable mechanical shift mechanism and delivers output shaft power of 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. The 1-1/4" round output shaft with key suits hydraulic pump and pneumatic blower drives. Intermittent torque is rated at 375 lb-ft (508 Nm) per application specs. The deep-mount housing option accommodates Mack transmission applications, and the cast iron housing with tapered cone bearings on the output shaft supports demanding duty cycles. Compatible with Eaton/Fuller and Volvo/Mack transmissions. Call us to confirm proper fit for your specific transmission.
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on both the input and output shafts, replacing the needle bearings common in lighter-duty units. This design increases load-bearing capability and extends service life under continuous or demanding intermittent use. Applications supported by this series include aerial work platforms, dump trucks, refuse vehicles, fire and rescue equipment, snow and ice removal, and blower and product pump installations. Continuous operation is possible with a 30% torque de-rating applied. The 360-degree rotatable flange option (where applicable by configuration) allows flexible pump positioning. Refer to Chelsea application pages to confirm the exact torque rating and gear ratio for part number 680XSDAX-A5RF.
Features
8-bolt mounting type for broad manual transmission coverage
Wire/cable mechanical shift mechanism
1-1/4" round output shaft with key
Intermittent torque rating up to 375 lb-ft (508 Nm) - verify actual rating on application pages
Deep-mount housing option designed for Mack transmission applications
Output power exceeds 56 HP / 51 kW; shaft power: 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
- Shaft Power: 36 HP / 27 kW at 500 RPM; 71 HP / 53 kW at 1,000 RPM; 107 HP / 80 kW at 1,500 RPM
- Output Shaft Type: 1-1/4" Round with Key
- Mounting Type: 8-Bolt
- Compatible Transmission Manufacturers: Eaton/Fuller, Volvo/Mack, Other
Additional Information
The Chelsea 680 Series is built around a cast iron housing with tapered cone bearings on both the input and output shafts, replacing the needle bearings common in lighter-duty units. This design increases load-bearing capability and extends service life under continuous or demanding intermittent use. Applications supported by this series include aerial work platforms, dump trucks, refuse vehicles, fire and rescue equipment, snow and ice removal, and blower and product pump installations. Continuous operation is possible with a 30% torque de-rating applied. The 360-degree rotatable flange option (where applicable by configuration) allows flexible pump positioning. Refer to Chelsea application pages to confirm the exact torque rating and gear ratio for part number 680XSDAX-A5RF.
