The Chelsea 680 Series Power Take-Off, part number 680QFMEX-56XV, is an 8-bolt mount PTO built for medium to heavy duty manual transmission applications. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft for long service life under high torque demand. Output power reaches 56+ HP, with shaft power ratings of 36 HP at 500 RPM, 71 HP at 1000 RPM, and 107 HP at 1500 RPM. Output options include SAE A, SAE B, and ISO 7652 pump flanges, as well as driveline configurations. The series suits Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and other transmission manufacturers. Common applications include dump trucks, aerial work, refuse, blower and product pump systems, and fire and rescue equipment.
Features
8-bolt mounting for compatibility with most manual transmissions featuring an 8-bolt PTO aperture
Cast iron housing with tapered cone bearings on the output shaft
Output power: 56+ HP / 51+ kW; shaft power 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
Series intermittent torque rating: 375 lb-ft (508 Nm) - check application pages for actual torque rating
Multiple output options: SAE A, SAE B, ISO 7652 pump flanges, and driveline
Designed for higher-torque vocational applications including pneumatic blowers, dump trucks, and aerial equipment
Tech Specs
- Mounting Type: 8-Bolt
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP (500 RPM), 71 HP (1000 RPM), 107 HP (1500 RPM)
- Intermittent Torque (Series): 375 lb-ft / 508 Nm (verify actual rating on application page)
- Continuous Operation: Yes, with 30% de-rating
- Shift Type: Wire/Cable or Mechanical
- Housing: Cast Iron
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, Other
- Lubricant Type: X = No Pressure Lube (per part number decode)
Additional Information
Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
