The Chelsea 871 Series Power Take-Off, part number 871XAFJP-D5RZ or 871XAFJPD5RZ, 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 operation. Nine speed ratios and thirteen output options give this unit a wide installation range across fire and rescue, refuse, truck crane, and pumper cleaner applications. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing vibrational effects. Optional Wet Spline, SmartStart, and Quiet Gear configurations are available within the 871 Series. The 871 Series also supersedes the Chelsea 870 Series PTO. Call us to confirm proper fit for your application.

The Chelsea 871 Series replaces the 870 Series PTO and is the only Chelsea PTO to offer all three high-demand options in a single platform: Wet Spline, SmartStart, and Quiet Gear. Wet Spline lubrication extends both PTO and pump shaft service life. SmartStart reduces shock load at engagement for demanding start-up cycles. Quiet Gear input reduces gear noise where noise levels are a concern. Electronic Overspeed Control (EOC) is available to protect driven equipment from overspeed damage. The 871 Series serves fire and rescue, refuse, truck crane, and pumper cleaner markets. Related Parker documentation includes the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Features
10-bolt PowerShift (hydraulic) mounting for Allison transmissions
Continuous torque capacity up to 670 lb-ft / 908 N-m, no derating required 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 options
Wet Spline pump flange, SmartStart, and Quiet Gear options available within the 871 Series
Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: Up to 670 lb-ft / 908 N-m (verify actual rating on application pages)
- Speed Ratios: Nine
- Output Options: Thirteen
- Lubricant Options: Pressure Lube (P), Wet Spline (W)
- 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 (48 kW at 500 RPM, 95 kW at 1000 RPM)
- Continuous Operation: Yes
Additional Information

The Chelsea 871 Series replaces the 870 Series PTO and is the only Chelsea PTO to offer all three high-demand options in a single platform: Wet Spline, SmartStart, and Quiet Gear. Wet Spline lubrication extends both PTO and pump shaft service life. SmartStart reduces shock load at engagement for demanding start-up cycles. Quiet Gear input reduces gear noise where noise levels are a concern. Electronic Overspeed Control (EOC) is available to protect driven equipment from overspeed damage. The 871 Series serves fire and rescue, refuse, truck crane, and pumper cleaner markets. Related Parker documentation includes the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Parts manual and diagrams: Chelsea 871 Series PTO parts list with prices
