The Chelsea 680 Series Power Take-Off, part number 680GFAHX-V3GB or 680GFAHXV3GB, is a medium- to heavy-duty PTO built for transmissions with an 8-bolt PTO aperture. The cast iron housing pairs with tapered cone bearings on the output shaft for strong load-bearing capability at higher torque demands, making it a common choice for pneumatic blower applications. The 680 Series covers Eaton Fuller and Mack transmissions, with a deep mount housing option available for Mack applications. The series offers four internal speed ratios and ten shift options, including wire and cable or mechanical shift. Output configurations include SAE A and SAE B pump flanges, driveline outputs, and Chelsea's 360-degree rotatable flange for flexible pump fitment. Call us to confirm the correct fit for your specific transmission and output requirements.
Features
8-bolt mounting for Eaton Fuller, Mack, Daimler/Detroit, and Volvo/Mack transmission applications
Cast iron housing with tapered cone bearings on both the input and output shafts
Deep mount housing option available for Mack transmission applications
Series-rated for intermittent torque of 301-400 lb-ft; continuous operation supported with 30% de-rating
Multiple output options: SAE A, SAE B, ISO 7652 pump flanges, driveline, and 360-degree rotatable flange
Shift options include wire/cable and mechanical; designed for higher-torque applications such as pneumatic blowers
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Shift Type: Wire/Cable, Mechanical
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: Round Shaft (1-1/4 in. with 5/16 in. key), SAE A (5/8 in. - 9T) Pump Spline, SAE B (7/8 in. - 13T) Pump Spline, SAE BB (1 in. - 15T) Pump Spline, SAE C (1-1/4 in. - 14T) Pump Spline, 1410 Companion Flange
- Intermittent Torque Rating: 301-400 lb-ft (series range; check application pages for this configuration)
- Continuous Operation: Yes, with 30% de-rating
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
- Housing Material: Cast Iron
- Lubricant Type: X - No Pressure Lube (per part number code)
- Part Number: 680GFAHX-V3GB or 680GFAHXV3GB
Additional Information
The Chelsea 680 Series PTO is suited for vocational applications including aerial work, dump truck and trailer, fire and rescue, refuse, service trucks, and snow and ice removal. The space-saving air shift cover is designed to maximize clearance under the truck. Parker Chelsea publishes the following documents for the 680 Series: the 680 Series Parts List (HY25-2660-M1_US), the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, and the Chelsea Power Take-Off General Information Catalog. Contact Pro Gear and Transmission to confirm proper fitment for your transmission model and output configuration.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
