The Chelsea 871 Series Power Take-Off Assembly, part number 871XDQTP-D5AB or 871XDQTPD5AB, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. The series delivers continuous torque capacity up to 670 lb-ft (908 N-m) with no derating required for continuous-duty applications. Nine speed ratios and thirteen output options cover a wide range of hydraulic pump configurations, including SAE B, SAE BB, SAE C, and DIN pump spline outputs. A ductile iron bearing cap rated 117% stronger than gray iron, combined with an o-ring sealing configuration between the housing and bearing cap, directly addresses the vibrational loads generated by current engine designs. The compact housing profile reduces clearance conflicts during installation. Optional SmartStart reduces shock load at start-up, Quiet Gear minimizes input noise, and Electronic Overspeed Control (EOC) protects driven equipment. The Wet Spline pump flange extends service life for both the PTO and the pump shaft. Available from Pro Gear and Transmission.
Features
10-bolt PowerShift (hydraulic) mounting for Allison transmissions
Ductile iron bearing cap, 117% stronger than gray iron
Continuous torque capacity up to 670 lb-ft (908 N-m), no continuous-duty derating required
Nine speed ratios and thirteen output options, including SAE B, SAE BB, SAE C, and DIN pump spline configurations
O-ring sealing between housing and bearing cap improves clamp load and resists vibrational effects
Wet Spline pump flange, SmartStart, Quiet Gear, and Electronic Overspeed Control (EOC) options available
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft (908 N-m) - check application pages for actual torque ratings
- Speed Ratios: Nine
- Output Options: Thirteen
- Output Shaft Types: 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, DIN 120 Flange, DIN 100 Flange
- Output Types: SAE B Pump Flange, SAE C Pump Flange
- Lubrication: Pressure Lube and Wet Spline
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM
- Continuous Operation: Yes
Additional Information
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
