The Chelsea 878XBQTP-M5XV is a constant mesh Power Take-Off from the Chelsea 878 Series, built to mount on Allison 10-bolt transmissions. The 878 Series carries a single continuous-duty torque rating of up to 670 lb-ft, making it one of the highest-rated PTOs available in its mounting class. The design features a ductile iron bearing cap rated 117% stronger than the gray iron used in predecessor units, an o-ring sealing configuration between the housing and bearing cap to improve clamp load, and steel clutch disc thickness increased by 80% over the prior generation. Output shaft options across the 878 Series include SAE B, SAE BB, and SAE C pump splines as well as companion flanges. This unit is sold by Pro Gear and Transmission.
Features
Constant mesh design with cast iron housing
Mounts to Allison 10-bolt transmissions
878 Series continuous-duty torque rating up to 670 lb-ft (908 Nm)
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap for improved clamp load
Clutch pack steel disc thickness increased 80% over prior generation
Tech Specs
- Shift Type: Constant Mesh
- Mounting Type: 10-Bolt
- Transmission Manufacturer: Allison
- Continuous Torque (Series): 670 lb-ft / 908 Nm (verify application-specific rating)
- Output Shaft Options (Series): 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 Series Companion Flange
- Output Flange Options (Series): SAE B Pump Flange, SAE C Pump Flange
- Continuous Operation: Yes
- Lubrication: Pressure Lube / Wet Spline options available
Additional Information
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
