The Chelsea 680XFAHX-M3XK or 680XFAHXM3XK is an 8-bolt Power Take-Off from the Chelsea 680 Series, engineered for medium to heavy duty manual transmission applications including Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and others. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft for increased load capacity, and the input shaft also uses tapered bearings rather than needle bearings for greater durability under heavy loads. The series is rated for intermittent torque of 301-400 lb-ft (375 lb-ft, check application pages for the actual rating for this configuration) and is designed for higher torque tasks such as pneumatic blowers. Continuous operation is supported with a 30% de-rating. The 680 Series offers a deep mount housing option suited for Mack transmission applications. Call us to confirm proper fit for your specific transmission and equipment.
Features
8-bolt mounting configuration for broad manual transmission coverage
Cast iron housing with tapered cone bearings on the output and input shafts
Intermittent torque rating: 301-400 lb-ft range (375 lb-ft series rating, verify for this configuration)
Continuous operation supported with 30% de-rating
Deep mount housing option available for Mack transmission applications
Designed for high-torque applications including pneumatic blowers, dump trucks, aerial, and refuse equipment
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, Other manual transmissions with 8-bolt PTO aperture
- Intermittent Torque (Series): 301-400 lb-ft / 501+ Nm (375 lb-ft / 508 Nm, check application pages for actual rating)
- Continuous Operation: Yes, with 30% de-rating
- Output Power (Series): 56+ HP / 51+ kW
- Shaft Power (Series): 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Shift Type: Wire/Cable or Mechanical
- Housing Material: Cast iron
- Output Shaft Bearing: Tapered cone bearings
- Input Shaft Bearing: Tapered bearings
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
The Chelsea 680 Series is covered in several Parker documents including the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, the 680 Series Parts List (HY25-2660-M1_US), and the Chelsea Power Take-Off General Information Catalog. This PTO family is suited for aerial, snow and ice removal, fire and rescue, dump truck and trailer, service trucks, refuse, and blower and product pump applications. The 680XFAHX-M3XK is also referenced as SP680XFAHX-M3XK. Pro Gear and Transmission carries genuine Chelsea PTO units, give us a call to confirm this part is the correct fit for your transmission and application.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
