The Chelsea 871 Series Power Take-Off, part number 871XEQTP-N5AC or 871XEQTPN5AC, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. The series carries a continuous torque rating 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 flexibility across fire and rescue, truck crane, pumper cleaner, and refuse applications. A ductile iron bearing cap - 117% stronger than gray iron - and an O-ring sealing configuration between the housing and bearing cap address the vibrational loads of modern engine designs. The compact housing profile reduces clearance conflicts at installation. The 871 Series is the only Chelsea PTO to combine Wet Spline, SmartStart, and Quiet Gear options in a single platform. Call us to confirm proper fit for your specific transmission and application.
The 871 Series replaces the earlier Chelsea 870 Series PTO. All improvements - including the ductile iron bearing cap and updated O-ring seal - are designed to address vibrational effects from current and next-generation engine designs. The SmartStart option reduces shock load at start-up for demanding applications, Quiet Gear input minimizes gear noise, and the Wet Spline pump flange extends service life for both the PTO output shaft and the driven pump shaft. Electronic Overspeed Control (EOC) is available to protect downstream equipment from overspeed events. Applicable Parker Chelsea documents for this series include 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
Ductile iron bearing cap - 117% stronger than gray iron
O-ring sealing configuration improves clamp load and resists vibration
Continuous torque rating up to 670 lb-ft (908 N-m) - no continuous-duty derating required
Nine speed ratios and thirteen output options
Wet Spline, SmartStart, and Electronic Overspeed Control (EOC) options available - the only Chelsea PTO series to offer all three
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
- 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
- Lubrication: Pressure Lube (P) and Wet Spline (W)
- Continuous Operation: Yes
- Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
The 871 Series replaces the earlier Chelsea 870 Series PTO. All improvements - including the ductile iron bearing cap and updated O-ring seal - are designed to address vibrational effects from current and next-generation engine designs. The SmartStart option reduces shock load at start-up for demanding applications, Quiet Gear input minimizes gear noise, and the Wet Spline pump flange extends service life for both the PTO output shaft and the driven pump shaft. Electronic Overspeed Control (EOC) is available to protect downstream equipment from overspeed events. Applicable Parker Chelsea documents for this series include the 871 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
