The Chelsea 871 Series Power Take-Off, part number 871LAFJW-B3TK or 871LAFJWB3TK, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmissions. The 871 Series replaces the earlier 870 Series with several targeted upgrades: a ductile iron bearing cap rated 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap to reduce vibrational effects and improve clamp load. Continuous-duty torque capacity reaches 670 lb-ft (908 N-m) with no derating required. Nine speed ratios and thirteen output options cover a wide range of hydraulic and driven-equipment configurations. The 871 Series is the only Chelsea PTO offering all three premium options together: Wet Spline, SmartStart, and Quiet Gear. Call us to confirm proper fit for your application.
The Chelsea 871 Series is suited for fire and rescue apparatus, truck cranes, pumper cleaners, and refuse vehicles. The compact housing design reduces clearance concerns at installation, and multiple assembly arrangements expand mounting possibilities. The 871 Series succeeds the Chelsea 870 Series PTO, carrying forward proven 10-bolt architecture while adding the ductile iron bearing cap, improved O-ring sealing, and support for all three Chelsea premium options: 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 downstream driven equipment.
Features
10-bolt PowerShift (hydraulic) mounting for Allison transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap reduces vibrational effects and improves clamp load
Continuous-duty torque capacity up to 670 lb-ft (908 N-m), no derating required
Nine speed ratios and thirteen output options
Wet Spline, SmartStart, and Quiet Gear options available, the only Chelsea PTO to offer all three
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 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 Types: SAE B Pump Flange, SAE C Pump Flange
- Lubricant System: Pressure Lube and Wet Spline
- Continuous Operation: Yes
Additional Information
The Chelsea 871 Series is suited for fire and rescue apparatus, truck cranes, pumper cleaners, and refuse vehicles. The compact housing design reduces clearance concerns at installation, and multiple assembly arrangements expand mounting possibilities. The 871 Series succeeds the Chelsea 870 Series PTO, carrying forward proven 10-bolt architecture while adding the ductile iron bearing cap, improved O-ring sealing, and support for all three Chelsea premium options: 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 downstream driven equipment.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
