The Chelsea 871 Series Power Take-Off, part number 871XBKVP-B5RS or 871XBKVPB5RS, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. The 871 Series replaces the earlier 870 Series with measurable upgrades: a ductile iron bearing cap rated 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap that improves clamp load and resists vibration from modern engine designs. Continuous torque capacity for the 871 Series reaches up to 670 lb-ft (908 N-m), with nine available speed ratios and thirteen output options giving installers wide application flexibility. The compact housing reduces clearance issues in tight installations. 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 fit for your application.
The 871 Series PTO is suited for demanding vocational applications including fire and rescue, truck cranes, pumper cleaner units, and refuse vehicles. Reference documents available for this series include the 267/281/288/871/878 Series Owner's Manual, the 871 Series Parts List (HY25-2871-M1/US), and 871 Series Sales Literature. Contact Pro Gear and Transmission to confirm which configuration applies to your chassis and transmission.
Features
10-Bolt PowerShift (Hydraulic) mounting, designed for Allison transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibration 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 for broad application coverage
Wet Spline pump flange, SmartStart, and Quiet Gear options all available on this series
Electronic Overspeed Control (EOC) option available to protect driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque Capacity: 670 lb-ft (908 N-m)
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM
- Speed Ratios: Nine available
- Output Options: Thirteen available
- 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 options available
- Continuous Operation: Yes
Additional Information
The 871 Series PTO is suited for demanding vocational applications including fire and rescue, truck cranes, pumper cleaner units, and refuse vehicles. Reference documents available for this series include the 267/281/288/871/878 Series Owner's Manual, the 871 Series Parts List (HY25-2871-M1/US), and 871 Series Sales Literature. Contact Pro Gear and Transmission to confirm which configuration applies to your chassis and transmission.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
