The Chelsea 680 Series Power Take-Off, part number 680XQAHX-A3GA or 680XQAHXA3GA, is an 8-bolt mount PTO designed for medium- to heavy-duty manual transmission applications. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft, making it suited for higher-torque applications including pneumatic blowers. Coverage includes Eaton Fuller transmissions, with a deep-mount housing option available for Mack applications. The series supports four internal speed ratios, ten shift options, and thirty-two output configurations, including a 360-degree rotatable flange for flexible pump fitment. Intermittent torque ratings for the 680 Series reach 375 lb-ft. Call us to confirm proper fit for your specific transmission and application.
Features
8-Bolt mounting for broad manual transmission coverage, including Eaton Fuller and Mack
Cast iron housing with tapered cone bearings on input and output shafts
Designed for higher-torque applications such as pneumatic blowers
32 output options including a 360-degree rotatable flange
Four internal speed ratios and ten shift options
Space-saving air shift cover for maximum clearance under the vehicle
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility: Eaton Fuller, Volvo/Mack, Daimler/Detroit, and other manual transmissions with 8-bolt PTO aperture
- Intermittent Torque (Series): 375 lb-ft (508 Nm) - check application pages for actual torque rating
- Continuous Operation: Yes, with 30% de-rating
- Shift Type: Wire/Cable or Mechanical
- Output Options: 32 configurations, including 360-degree rotatable flange
- Internal Speed Ratios: Four available
- Shift Options: Ten available
- Housing: Cast iron
- Output Shaft Bearing: Tapered cone
- Output Power (Series): 56+ HP / 51+ kW
- Shaft Power (Series): 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
- 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 applications across aerial equipment, snow and ice removal, fire and rescue, dump trucks, service trucks, refuse vehicles, and blower and product pump systems. The space-saving air shift cover is designed to maximize clearance in tight under-cab installations. Parker Chelsea publishes a dedicated parts list (HY25-2660-M1_US) and sales literature for the 680 Series, as well as a combined owner's manual covering the 680 alongside other Chelsea series. A Detroit DT12 Adapter Owner's Manual is also available for compatible 680 Series installations. Contact Pro Gear and Transmission to verify correct fitment for your truck and transmission combination.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
