The Chelsea 871XDFJP-D5AC or 871XDFJPD5AC is a 10-bolt PowerShift (hydraulic shift) Power Take-Off from the Chelsea 871 Series, designed for Allison transmission applications. The compact housing reduces clearance issues common in tight under-cab installations. The series delivers continuous torque capacity up to 670 lb-ft (908 N-m) with no derating required for continuous duty. Nine speed ratios and thirteen output configurations give this unit broad application flexibility across fire and rescue, truck crane, pumper cleaner, and refuse markets. A ductile iron bearing cap rated 117% stronger than gray iron and an O-ring sealing configuration between the housing and bearing cap reduce the damaging vibrational effects of modern engine designs. The Wet Spline pump flange option extends PTO and pump shaft service life. Call us to confirm proper fit for your application.

The 871 Series replaces the earlier Chelsea 870 Series PTO. It is the only Chelsea PTO to offer all three of Chelsea's high-demand options together: Wet Spline, SmartStart, and Quiet Gear. SmartStart reduces shock load at start-up for demanding applications. Electronic Overspeed Control (EOC) is available to protect driven equipment from overspeed damage. Parker Chelsea documents for this series include the 267/281/288/871/878 Series Owner's Manual, the 871 Series Parts List (HY25-2871-M1/US), and the 871 Series Sales Literature.
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 for broad application flexibility
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Wet Spline pump flange option extends PTO and pump shaft life; SmartStart and Quiet Gear options also available
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque Capacity: 670 lb-ft (908 N-m) - check application pages for actual torque ratings
- Speed Ratios: Nine
- Output Options: Thirteen
- Output Shaft Types Available: 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 Flange Types Available: SAE B Pump Flange, SAE C Pump Flange
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM
- Lubricant System: Pressure Lube and Wet Spline options
- Continuous Operation: Yes
- Typical Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information

The 871 Series replaces the earlier Chelsea 870 Series PTO. It is the only Chelsea PTO to offer all three of Chelsea's high-demand options together: Wet Spline, SmartStart, and Quiet Gear. SmartStart reduces shock load at start-up for demanding applications. Electronic Overspeed Control (EOC) is available to protect driven equipment from overspeed damage. Parker Chelsea documents for this series include the 267/281/288/871/878 Series Owner's Manual, the 871 Series Parts List (HY25-2871-M1/US), and the 871 Series Sales Literature.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.