The Chelsea 680QQMEX-56RY is a 680 Series Power Take-Off built for 8-bolt manual transmission applications. The cast iron housing and tapered cone bearings on the output shaft give this series its high intermittent torque rating of up to 375 lb-ft (508 Nm). Tapered input shaft bearings replace needle bearings for improved load capacity. The 680 Series supports continuous operation with a 30% de-rating and is engineered for demanding applications including pneumatic blowers, aerial equipment, refuse trucks, and dump trucks. Chelsea's 360-degree rotatable flange option and four internal speed ratios make the 680 a versatile choice across Eaton/Fuller, Volvo/Mack, and Daimler/Detroit manual transmission platforms with an 8-bolt PTO aperture. A deep mount housing option is available for Mack applications. This part is sold by Pro Gear and Transmission.
Features
8-bolt mounting for coverage across most manual transmission applications
Cast iron housing with tapered cone bearings on the output shaft
Intermittent torque rating up to 375 lb-ft (508 Nm); continuous operation supported with 30% de-rating
Tapered input shaft bearings for greater load capacity vs. needle bearings
Compatible with Eaton/Fuller, Volvo/Mack, and Daimler/Detroit transmissions; deep mount option for Mack
Shift options include wire/cable and mechanical; output options include SAE A, SAE B, and driveline configurations
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable, Mechanical
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Intermittent Torque: Up to 375 lb-ft (508 Nm) - check application pages for actual rating
- Continuous Operation: Yes, with 30% de-rating
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Housing Material: Cast Iron
- Lubrication: Pressure lube or no pressure lube depending on configuration
Additional Information
The Chelsea 680 Series is covered by Parker Chelsea documentation including the 680 Series Parts List (HY25-2660-M1_US), 680 Series Sales Literature, and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual. Additional references include the Chelsea Power Take-Off General Information Catalog and PTO-PNI-250 covering new 680 Series ratio and output options. Part number 680QQMEX-56RY is also referenced as SP680QQMEX-56RY.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
