The Chelsea 871 Series Power Take-Off, part number 871XAKVW-B5RY or 871XAKVWB5RY, is a 10-bolt PowerShift (hydraulic) PTO designed for Allison transmission applications. The series delivers continuous torque capacity up to 670 lb-ft (908 N-m) with no derating required for continuous-duty use. Nine speed ratios and thirteen output options give installers wide flexibility across fire and rescue, refuse, pumper cleaner, and truck crane applications. The compact housing reduces clearance concerns, and the ductile iron bearing cap is 117% stronger than gray iron. An O-ring sealing configuration between the housing and bearing cap improves clamp load and resists vibrational stress from modern engine designs. Wet Spline, SmartStart, and Quiet Gear options are available within the 871 Series. The 871 Series replaces Chelsea's earlier 870 Series PTO. Call us to confirm proper fit and option configuration for your application.
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 rated 117% stronger than gray iron
O-ring sealing between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios and thirteen output options including SAE B, SAE C, and DIN pump flanges
Wet Spline pump flange, SmartStart, and Quiet Gear options available; 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) - 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
- Lubricant: Pressure Lube and Wet Spline
- Continuous Operation: Yes
- Supersedes: Chelsea 870 Series PTO
Additional Information
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
