The Chelsea 871 Series Power Take-Off, part number 871LFFJW-D5TY or 871LFFJWD5TY, is a compact 10-bolt hydraulic PowerShift PTO designed for Allison transmissions. 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 options give this unit broad application flexibility across fire and rescue, truck crane, pumper cleaner, and refuse vocations. 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 vibration-induced stress from modern engine designs. Wet Spline lubrication extends PTO and pump shaft service life. Call us to confirm proper fit for your specific transmission and application.
The Chelsea 871 Series replaces the earlier 870 Series PTO. Markets served include fire and rescue, truck cranes, pumper cleaner, and refuse applications. The 871 Series is the only Chelsea PTO to offer all three premium options simultaneously: Wet Spline, SmartStart, and Quiet Gear. Refer to the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual for detailed installation and service guidance.
Features
10-bolt mounting, hydraulic PowerShift (PowerShift) engagement for Allison transmissions
Continuous torque rating up to 670 lb-ft (908 N-m) with no continuous-duty derating required
Ductile iron bearing cap, 117% stronger than gray iron, with o-ring sealing to resist vibration-induced clamp loss
Nine speed ratios and thirteen output configurations for broad vocation coverage
Wet Spline pump flange lubricates the output spline to extend PTO and pump shaft life
Optional SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment; Quiet Gear input 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
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1000 RPM (48 kW at 500 RPM / 95 kW at 1000 RPM)
- Speed Ratios: Nine
- Output Options: Thirteen
- Lubricant System: Pressure Lube with Wet Spline
- Continuous Operation: Yes
- Available 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
- Available Output Flange Types: SAE B Pump Flange, SAE C Pump Flange
- Optional Features: Wet Spline, SmartStart, Quiet Gear, Electronic Overspeed Control (EOC)
Additional Information
The Chelsea 871 Series replaces the earlier 870 Series PTO. Markets served include fire and rescue, truck cranes, pumper cleaner, and refuse applications. The 871 Series is the only Chelsea PTO to offer all three premium options simultaneously: Wet Spline, SmartStart, and Quiet Gear. Refer to the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual for detailed installation and service guidance.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
