The Chelsea 871 Series Power Take-Off, part number 871XFFJP-B5AB or 871XFFJPB5AB, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. It delivers continuous torque capacity up to 670 lb-ft (908 N-m) with no derating required for continuous duty applications. Nine speed ratios and thirteen output options give this unit broad application flexibility across fire and rescue, truck cranes, pumper cleaner, and refuse equipment. 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 and reduces vibrational effects. The 871 Series is the only Chelsea PTO to offer all three premium options together: Wet Spline, SmartStart, and Quiet Gear. Call us to confirm proper fitment for your specific Allison transmission application.
The 871 Series replaces the earlier Chelsea 870 Series PTO, carrying forward its installation footprint while adding upgraded bearing, sealing, and drivetrain protection features. Markets served include fire and rescue, truck cranes, pumper cleaner equipment, and refuse vehicles. Relevant Parker documentation includes the 267/281/288/871/878 Series Owner's Manual and the 871 Series Parts List (HY25-2871-M1/US). Part number 871XFFJP-B5AB is also referenced as SP871XFFJP-B5AB in some catalog systems.
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 rated 117% stronger than gray iron
O-ring sealing configuration reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output options for broad application flexibility
Wet Spline, SmartStart, and Quiet Gear options all available on this series
Electronic Overspeed Control (EOC) option protects driven equipment
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
- Speed Ratios: Nine
- Output Options: Thirteen
- Lubricant System: Pressure Lube and Wet Spline
- 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
- Continuous Operation: Yes
- NMFC Code: 125820 (Hydraulic PTOs, Pumps, Motors)
Additional Information
The 871 Series replaces the earlier Chelsea 870 Series PTO, carrying forward its installation footprint while adding upgraded bearing, sealing, and drivetrain protection features. Markets served include fire and rescue, truck cranes, pumper cleaner equipment, and refuse vehicles. Relevant Parker documentation includes the 267/281/288/871/878 Series Owner's Manual and the 871 Series Parts List (HY25-2871-M1/US). Part number 871XFFJP-B5AB is also referenced as SP871XFFJP-B5AB in some catalog systems.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
