The Chelsea 680GRAHX-A3XK or 680GRAHXA3XK is an 8-bolt power take-off from Chelsea's 680 Series, designed for medium to heavy-duty manual transmission applications. It features a cast iron housing with tapered cone bearings on the output shaft for high torque capability, with an intermittent torque rating of up to 375 lb-ft (508 Nm) for the series. The 680 Series covers Eaton Fuller, Volvo/Mack, and Daimler/Detroit transmissions, and includes a deep mount housing option suited to Mack applications. The space-saving air shift cover maximizes clearance under the truck. Continuous operation is supported with a 30% de-rating. 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 output shaft bearings
Intermittent torque rating up to 375 lb-ft (508 Nm) for the 680 Series
Continuous operation capable with 30% de-rating applied
Deep mount housing option compatible with Mack transmission applications
Space-saving air shift cover for maximum under-truck clearance
Tech Specs
- Mounting Type: 8-Bolt
- Series: Chelsea 680
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Intermittent Torque (Series): 375 lb-ft (508 Nm) - check application pages for actual rating
- Continuous Operation: Yes, with 30% de-rating
- Shift Type: Wire/Cable or Mechanical
- Output Options: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Housing: Cast Iron
- Output Shaft Bearing: Tapered Cone
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
The Chelsea 680 Series serves a wide range of vocational applications including aerial work platforms, snow and ice removal, fire and rescue, dump trucks, refuse vehicles, service trucks, and blower/product pump systems. The series offers 32 output options and four internal speed ratios, with shaft power rated at 36 HP at 500 RPM, 71 HP at 1000 RPM, and 107 HP at 1500 RPM. Chelsea's 360-degree rotatable flange option within the series provides additional flexibility for pump fitment. The 680GRAHX-A3XK is sold by Pro Gear and Transmission. Not sure this is your part? Give us a call.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
