The Chelsea 871 Series Power Take-Off, part number 871XAKVW-B5RS or 871XAKVWB5RS, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmission applications. The compact housing reduces installation clearance issues, while a ductile iron bearing cap rated 117% stronger than gray iron and an O-ring sealing configuration between the housing and bearing cap improve clamp load and reduce vibrational effects from modern engine designs. Continuous torque capacity reaches 670 lb-ft (908 N-m), with nine speed ratios and thirteen output options to match a wide range of hydraulic pump configurations. The 871 Series is the only Chelsea PTO that combines Wet Spline, SmartStart, and Quiet Gear options in a single platform, making it well suited for fire and rescue, truck crane, pumper cleaner, and refuse applications. Call us to confirm proper fit for your application.
The 871 Series replaces the Chelsea 870 Series PTO. Compatible markets include fire and rescue, truck cranes, pumper cleaner, and refuse. Reference documents: 267/281/288/871/878 Series Owner's Manual; 871 Series Parts List (HY25-2871-M1/US); Chelsea PTO Stud Kits (HY25-2002-M1_US). Part number also referenced as SP871XAKVW-B5RS.
Features
10-bolt PowerShift (hydraulic) mounting for Allison transmissions
Ductile iron bearing cap, 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Continuous torque capacity up to 670 lb-ft (908 N-m); rated for continuous-duty operation without derating
Nine speed ratios and thirteen output options
Wet Spline pump flange, SmartStart, and Quiet Gear options available on a single platform; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft (908 N-m)
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1,000 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 and Wet Spline
- Continuous Operation: Yes
- Available Options: Wet Spline, SmartStart, Quiet Gear, Electronic Overspeed Control (EOC)
- Supersedes: Chelsea 870 Series PTO
Additional Information
The 871 Series replaces the Chelsea 870 Series PTO. Compatible markets include fire and rescue, truck cranes, pumper cleaner, and refuse. Reference documents: 267/281/288/871/878 Series Owner's Manual; 871 Series Parts List (HY25-2871-M1/US); Chelsea PTO Stud Kits (HY25-2002-M1_US). Part number also referenced as SP871XAKVW-B5RS.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
