The Chelsea 871 Series Power Take-Off, part number 871XAFJP-B5RK or 871XAFJPB5RK, is a 10-bolt hydraulic PowerShift PTO designed for Allison transmissions. The 871 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 options cover a wide range of hydraulic system requirements. A ductile iron bearing cap rated 117% stronger than gray iron, combined with an O-ring sealing configuration between the housing and bearing cap, addresses the vibrational stress common in modern engine designs. The compact housing reduces clearance concerns during installation. Optional Wet Spline, SmartStart, and Quiet Gear configurations make this the only Chelsea PTO to offer all three of those features in one platform. Sold by Pro Gear and Transmission. Call us to confirm the correct configuration for your application.
The Chelsea 871 Series replaces the earlier 870 Series PTO. Typical markets include fire and rescue apparatus, truck cranes, pumper-cleaner units, and refuse vehicles. Reference 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 871 Series Sales Literature. Part number 871XAFJP-B5RK is also referenced as SP871XAFJP-B5RK in some catalog systems. Call Pro Gear and Transmission to confirm proper fit and configuration for your chassis and pump requirements.
Features
10-bolt PowerShift (hydraulic) mounting for Allison transmissions
Ductile iron bearing cap, 117% stronger than gray iron
O-ring seal between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output configurations
Wet Spline pump flange option extends PTO and pump shaft service life
SmartStart option reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft / 908 N-m (check application pages for actual torque ratings)
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1,000 RPM
- 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 Flange Types: SAE B Pump Flange, SAE C Pump Flange
- Lubrication: Pressure Lube and Wet Spline
- Continuous Operation: Yes
- Optional Features: Quiet Gear input, SmartStart, Wet Spline, Electronic Overspeed Control (EOC)
Additional Information
The Chelsea 871 Series replaces the earlier 870 Series PTO. Typical markets include fire and rescue apparatus, truck cranes, pumper-cleaner units, and refuse vehicles. Reference 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 871 Series Sales Literature. Part number 871XAFJP-B5RK is also referenced as SP871XAFJP-B5RK in some catalog systems. Call Pro Gear and Transmission to confirm proper fit and configuration for your chassis and pump requirements.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
