The Chelsea 680GRAHX-A3RB or 680GRAHXA3RB is a medium- to heavy-duty power take-off from the Chelsea 680 Series, built for manual transmissions with an 8-bolt PTO aperture. The 680 Series features a cast iron housing with tapered cone bearings on both the input and output shafts, a design suited to higher-torque applications such as pneumatic blowers. The series supports output power of 56+ HP and intermittent torque in the 301-400 lb-ft range, with continuous operation available at a 30% de-rating. Compatible transmission manufacturers for the 680 Series include Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and others. A deep-mount housing option covers Mack transmission applications. Call us to confirm proper fit for your specific transmission and application.
Features
8-bolt mounting for most manual transmission applications
Cast iron housing with tapered cone bearings on input and output shafts
56+ HP output power; intermittent torque rating 301-400 lb-ft (series-level)
Continuous operation capable with 30% de-rating
Deep-mount housing option available for Mack transmission applications
Suited to high-torque vocational uses including pneumatic blowers, aerial, dump, and refuse applications
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Intermittent Torque (series): 301-400 lb-ft
- Output Power (series): 56+ HP
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Continuous Operation: Yes, with 30% de-rating
- Shift Type: Wire/Cable or Mechanical
- Housing: Cast iron
- Output Shaft Bearing: Tapered cone bearings
- Lubricant Type (series): Pressure Lube (P) or No Pressure Lube (X) depending on variant
Additional Information
The Chelsea 680 Series is used across a wide range of vocational markets including aerial work platforms, snow and ice removal, fire and rescue, dump trucks, service trucks, refuse trucks, and blower and product pump applications. The series offers thirty-two output options and four internal speed ratios. Parker documentation for this series includes the 680 Series Parts List (HY25-2660-M1_US) and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, available through Parker Chelsea resources.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
