The Chelsea 871XAFJP-G5SV or 871XAFJPG5SV is a 10-bolt PowerShift (hydraulic) Power Take-Off in the 871 Series, designed for Allison transmission applications. The 871 Series carries a continuous torque rating of up to 670 lb-ft (908 N-m) with no derating required for continuous duty use. Nine speed ratios and thirteen output configurations give installers broad flexibility. A ductile iron bearing cap, rated 117% stronger than gray iron, pairs with an O-ring sealing configuration between the housing and bearing cap to resist the vibrational loads common in modern engine designs. The compact housing profile reduces clearance issues during installation. Optional Wet Spline pump flange, SmartStart shock-load reduction, Quiet Gear input, and Electronic Overspeed Control (EOC) are available within the series. Call us to confirm proper fit and option configuration for your application.

The 871 Series supersedes the Chelsea 870 Series PTO. Applicable Parker Chelsea documents include the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The 871 Series is the only Chelsea PTO to combine Wet Spline, SmartStart, and Quiet Gear options in a single platform, making it a fit for demanding vocations including fire and rescue, truck cranes, pumper-cleaner trucks, and refuse vehicles.
Features
10-Bolt PowerShift (hydraulic) mounting for Allison transmissions
Continuous torque rating up to 670 lb-ft (908 N-m) - no derating for continuous duty
Ductile iron bearing cap - 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output configurations
Optional Wet Spline pump flange, SmartStart, Quiet Gear input, and Electronic Overspeed Control (EOC) available
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 ratings
- Speed Ratios: Nine
- Output Options: Thirteen
- Lubricant System: Pressure Lube and Wet Spline
- 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
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM
- Continuous Operation: Yes
Additional Information

The 871 Series supersedes the Chelsea 870 Series PTO. Applicable Parker Chelsea documents include the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The 871 Series is the only Chelsea PTO to combine Wet Spline, SmartStart, and Quiet Gear options in a single platform, making it a fit for demanding vocations including fire and rescue, truck cranes, pumper-cleaner trucks, and refuse vehicles.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
