The Chelsea 871 Series Power Take-Off, part number 871XAQTP-B5RY or 871XAQTPB5RY, is a 10-bolt hydraulic PowerShift 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. 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 the vibrational demands of modern engine designs. Nine available speed ratios and thirteen output options cover a wide range of hydraulic system requirements. Wet Spline, SmartStart, and Quiet Gear options are all available within this series, which replaces the earlier Chelsea 870 Series. Call us to confirm the specific configuration of this assembly for your application.
The 871 Series is the only Chelsea PTO to offer all three of the brand's high-demand options in a single platform: Wet Spline pump flange for extended PTO and pump shaft life, SmartStart to reduce shock load at start-up, and Quiet Gear input for noise-sensitive applications. Electronic Overspeed Control (EOC) is available to protect driven equipment in demanding vocational applications. Typical markets for the 871 Series include fire and rescue apparatus, truck cranes, pumper-cleaner trucks, and refuse vehicles. This assembly supersedes the Chelsea 870 Series.
Features
10-bolt PowerShift (hydraulic) mounting for Allison transmissions
Continuous torque capacity up to 670 lb-ft / 908 N-m, no continuous-duty derating required
Ductile iron bearing cap, 117% stronger than gray iron
O-ring sealing configuration reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output options within the 871 Series
Wet Spline, SmartStart, and Quiet Gear options available; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting: 10-bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Fitment: Allison
- Continuous Torque: up to 670 lb-ft / 908 N-m
- Speed Ratios: Nine available
- Output Options: Thirteen available
- Lubricant System: Pressure Lube and Wet Spline options
- Series: Chelsea 871 Series (replaces 870 Series)
Additional Information
The 871 Series is the only Chelsea PTO to offer all three of the brand's high-demand options in a single platform: Wet Spline pump flange for extended PTO and pump shaft life, SmartStart to reduce shock load at start-up, and Quiet Gear input for noise-sensitive applications. Electronic Overspeed Control (EOC) is available to protect driven equipment in demanding vocational applications. Typical markets for the 871 Series include fire and rescue apparatus, truck cranes, pumper-cleaner trucks, and refuse vehicles. This assembly supersedes the Chelsea 870 Series.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
