The Chelsea 871 Series Power Take-Off Assembly, part number 871XAFJW-B5RS or 871XAFJWB5RS, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. The 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 configurations give this unit broad application flexibility across fire and rescue, truck crane, 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 reduces vibrational effects while improving clamp load. The Wet Spline pump flange protects both the PTO and pump shaft. SmartStart and Quiet Gear options are available for specialized applications. Call us to confirm the correct fit and configuration for your truck. Cross-references: 870XAFJW-B5RS or 870XAFJWB5RS.
Features
10-bolt PowerShift (hydraulic) mounting, designed 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 between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output configurations
Wet Spline pump flange, SmartStart, and Quiet Gear options available; 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
- Speed Ratios: Nine
- Output Options: Thirteen
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1000 RPM (48 kW at 500 RPM / 95 kW at 1000 RPM)
- Lubricant: Pressure Lube and Wet Spline
- Continuous Operation: Yes
- Cross Reference: 870XAFJW-B5RS or 870XAFJWB5RS
Additional Information
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
