The Chelsea 871 Series Power Take-Off Assembly, part number 871XEFJP-K5XV or 871XEFJPK5XV, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. The 871 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 options cover a wide range of application demands, from fire and rescue apparatus to refuse and pumper-cleaner trucks. A ductile iron bearing cap rated 117% stronger than gray iron and an O-ring sealing configuration between the housing and bearing cap combat the vibrational stress of modern engine designs. Optional Wet Spline lubrication, SmartStart shock-load reduction, and Quiet Gear input make this one of Chelsea's most configurable PTO platforms. Pro Gear and Transmission supplies genuine Chelsea parts; call us to confirm proper fit for your specific transmission and installation.
The Chelsea 871 Series replaces the earlier 870 Series PTO, carrying forward the proven 10-bolt Allison mounting envelope while adding the ductile iron bearing cap and improved O-ring housing seal. It is the only Chelsea PTO to offer all three premium options together: Wet Spline pump flange lubrication, SmartStart engagement, and Quiet Gear input. Typical markets include fire and rescue, truck cranes, pumper-cleaner, and refuse vehicles. Reference documents include the 267/281/288/871/878 Series Owner's Manual and the 871 Series Parts List (HY25-2871-M1/US). Call Pro Gear and Transmission to verify the correct assembly configuration for your truck and transmission.
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 predecessor
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output options for broad application coverage
Optional Wet Spline pump flange, SmartStart shock-load reduction, and Quiet Gear input available
Electronic Overspeed Control (EOC) available to protect driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft / 908 N-m (verify actual rating on application page)
- 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
- Continuous Operation: Yes
- Lubrication Options: Pressure Lube, Wet Spline
- Optional Features: Quiet Gear input, SmartStart, Electronic Overspeed Control (EOC)
Additional Information
The Chelsea 871 Series replaces the earlier 870 Series PTO, carrying forward the proven 10-bolt Allison mounting envelope while adding the ductile iron bearing cap and improved O-ring housing seal. It is the only Chelsea PTO to offer all three premium options together: Wet Spline pump flange lubrication, SmartStart engagement, and Quiet Gear input. Typical markets include fire and rescue, truck cranes, pumper-cleaner, and refuse vehicles. Reference documents include the 267/281/288/871/878 Series Owner's Manual and the 871 Series Parts List (HY25-2871-M1/US). Call Pro Gear and Transmission to verify the correct assembly configuration for your truck and transmission.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
