The Chelsea 680XFAHX-M3AZ or 680XFAHXM3AZ is a medium- to heavy-duty Power Take-Off from the Chelsea 680 Series, built for 8-bolt PTO aperture transmissions including Eaton Fuller and Mack applications. The 680 Series features a cast iron housing with tapered cone bearings on both the input and output shafts for greater load capacity than needle-bearing designs. The series carries an intermittent torque rating up to 375 lb-ft and supports continuous operation with a 30% de-rating. Multiple output options include SAE A, SAE B, and other pump flange configurations, making this unit well-suited for pneumatic blowers, dump trucks, aerial equipment, and refuse applications. Call us to confirm proper fit for your specific transmission.
Features
Chelsea 680 Series Power Take-Off, part number 680XFAHX-M3AZ or 680XFAHXM3AZ
8-bolt mounting pattern fits most manual transmission applications with 8-bolt PTO apertures
Cast iron housing with tapered cone bearings on input and output shafts
Intermittent torque rating up to 375 lb-ft (508 Nm) - check application pages for actual rating
Supports continuous operation with 30% de-rating applied
Compatible with Eaton/Fuller, Volvo/Mack, and Daimler/Detroit transmissions; deep mount housing option available for Mack applications
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Intermittent Torque Rating: Up to 375 lb-ft (508 Nm) - verify actual rating for application
- Continuous Operation: Yes, with 30% de-rating
- Output Options: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Shift Type: Wire/Cable or Mechanical
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 36 HP at 500 RPM / 71 HP at 1000 RPM / 107 HP at 1500 RPM
- Housing Material: Cast Iron
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
