The Chelsea 680GFAHX-V3AZ or 680GFAHXV3AZ is a 680 Series Power Take-Off built for medium- to heavy-duty manual transmission applications with an 8-bolt PTO aperture. The 680 Series features a cast iron housing and tapered cone bearings on the output shaft for long service life in high-torque applications such as pneumatic blowers, dump trucks, refuse vehicles, and aerial equipment. The air shift cover is designed to save space and maximize clearance under the truck. Input shaft tapered bearings provide greater load-bearing capability compared to needle-bearing designs. The series carries an intermittent torque rating of 375 lb-ft (508 Nm) with continuous operation supported at a 30% de-rating. Output options include SAE A, SAE B, and other pump flange configurations, and the series supports Eaton Fuller, Volvo/Mack, and Daimler/Detroit transmissions. Pro Gear and Transmission carries this genuine Chelsea part. Call us to confirm proper fit for your application.
Features
8-bolt mounting for Eaton Fuller, Volvo/Mack, and Daimler/Detroit manual transmissions
Cast iron housing with tapered cone bearings on the output shaft
Intermittent torque rating of 375 lb-ft (508 Nm); continuous operation with 30% de-rating
Air shift cover designed for maximum clearance under the truck
Output power of 56+ HP; shaft power rated at 71 HP at 1,000 RPM
Deep mount housing option available for Mack transmission applications
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Air Shift (Wire/Cable or Mechanical options available in series)
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Intermittent Torque: 375 lb-ft (508 Nm) - check application pages for actual torque ratings
- Continuous Operation: Yes, with 30% de-rating
- Output Shaft Options: Round Shaft (1-1/4 in. - 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, DIN 5462 Pump Spline, 1410 Companion Flange
- Shaft Power: 36 HP (500 RPM), 71 HP (1,000 RPM), 107 HP (1,500 RPM)
- Lubricant Type: X = No Pressure Lube
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
The Chelsea 680 Series is a versatile PTO platform with four internal speed ratios and multiple shift configurations. The 680GFAHX-V3AZ falls within this series, which was specifically engineered for higher-torque vocational applications including pneumatic blowers, aerial lifts, fire and rescue equipment, snow and ice removal systems, and refuse trucks. Chelsea's 360-degree rotatable flange output option is available across the series, offering greater flexibility for pump positioning and fitment. The series also offers a deep mount housing variant designed for Mack transmission applications. Applicable Parker Chelsea documentation includes 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 Detroit DT12 Adapter Owner's Manual for compatible series. Not sure this is the right PTO for your truck? Call Pro Gear and Transmission and we will help you confirm proper fit.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
