The Chelsea 680QQMEX-56XD or 680QQMEX56XD is a medium- to heavy-duty Power Take-Off from the Chelsea 680 Series, built around an 8-bolt mounting configuration. The 680 Series uses a cast iron housing with tapered cone bearings on the output shaft, making it a common choice for higher-torque applications such as pneumatic blowers, dump trucks, aerial equipment, and refuse vehicles. The series covers Eaton Fuller transmissions and includes a deep mount housing option for Mack applications. Wire/cable and mechanical shift types are available across the series. Call us to confirm the exact output, ratio, and shift configuration for this specific part number before ordering.
Features
Chelsea 680 Series Power Take-Off, part number 680QQMEX-56XD or 680QQMEX56XD
8-bolt mounting configuration for broad manual transmission coverage
Cast iron housing with tapered cone bearings on the output shaft for higher torque loads
Deep mount housing option available for Mack transmission applications
Designed for demanding vocational uses including pneumatic blowers, aerial, dump, refuse, and fire/rescue equipment
Wire/cable and mechanical shift types available across the 680 Series
Tech Specs
- Mounting Type: 8-Bolt
- Transmission Compatibility (Series): Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Shift Type (Series): Wire/Cable, Mechanical
- Output Options (Series): SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options (Series): 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, 1410 Companion Flange
- Intermittent Torque (Series): up to 375 lb-ft (508 Nm) - check application pages for actual rating
- Continuous Operation (Series): Yes, with 30% de-rating
- Output Power (Series): 56+ HP / 51+ kW
- Shaft Power (Series): 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Housing Material: Cast Iron
- Lubricant Type (Series): Pressure Lube or No Pressure Lube depending on configuration
- NMFC Code: 128520 - Hydraulic PTOs, Pumps, Motors, etc.
Additional Information
The Chelsea 680 Series is supported by Parker Chelsea documentation including the 680 Series Parts List (HY25-2660-M1_US), 680 Series Sales Literature, the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, and the Chelsea Power Take-Off General Information Catalog. A Detroit DT12 Adapter Owner's Manual covering the 680 Series is also available. Contact Pro Gear and Transmission to confirm the specific output configuration, gear ratio, and shift type for part number 680QQMEX-56XD before ordering.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
