The Chelsea 680 Series Power Take-Off, part number 680XFAHX-P3AZ or 680XFAHXP3AZ, is a medium- to heavy-duty PTO built for 8-bolt transmission apertures. The 680 Series features a cast iron housing and tapered cone bearings on the output shaft, making it well suited for higher-torque applications such as pneumatic blowers, dump trucks, and refuse equipment. The series carries an intermittent torque rating of up to 375 lb-ft (508 Nm), with continuous operation supported at a 30% de-rating. The input shaft uses tapered bearings rather than needle bearings for greater load capacity. Transmission compatibility covers Eaton Fuller, Volvo/Mack (with a deep-mount housing option), Daimler/Detroit, and other manufacturers. Call us to confirm proper fit for your specific transmission.
Features
8-bolt mounting for broad transmission coverage including Eaton Fuller and Volvo/Mack applications
Cast iron housing with tapered cone bearings on the output shaft for extended service life
Intermittent torque rating up to 375 lb-ft (508 Nm); continuous operation with 30% de-rating
Deep-mount housing option available for Mack transmission applications
Multiple output options: SAE A, SAE B, ISO 7652 pump flange, and driveline
Suited for pneumatic blowers, aerial, dump, refuse, fire and rescue, and service truck applications
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, Other
- Intermittent Torque: Up to 375 lb-ft (508 Nm) - check application pages for actual rating
- Continuous Operation: Yes, with 30% de-rating
- Output Types: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Power: 56+ HP (42+ kW)
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Housing Material: Cast iron
- Shift Type: Wire/Cable or Mechanical
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
