Features
10-bolt mounting, hydraulic PowerShift (pressure lube, wet spline) operation
Continuous torque rating up to 670 lb-ft / 908 Nm - no derating required for continuous-duty use
Ductile iron bearing cap, 117% stronger than the gray iron cap on the predecessor 870 Series
O-ring sealing between housing and bearing cap improves clamp load and resists engine vibration
Nine speed ratios and thirteen output options for broad application flexibility
Wet Spline, SmartStart, and Quiet Gear options available within the 871 Series
Built for Allison transmission applications in fire/rescue, refuse, crane, and pumper-cleaner service
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft / 908 Nm (check application pages for actual torque ratings)
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1,000 RPM
- Output Types: SAE B Pump Flange, SAE C Pump Flange
- Output Shaft Options: SAE B (7/8"-13T), SAE BB (1"-15T), SAE C (1-1/4"-14T) Pump Spline; DIN 5462 Pump Spline; 1410 Series Companion Flange; DIN 120 Flange; DIN 100 Flange
- Continuous Operation: Yes
- Speed Ratios: Nine
- Output Options: Thirteen
- Lubricant System: Pressure Lube / Wet Spline
Additional Information
The Chelsea 871 Series supersedes the 870 Series PTO. Upgrades over the 870 include the ductile iron bearing cap and the improved o-ring sealing configuration. Optional Electronic Overspeed Control (EOC) is available to protect driven equipment. The 871 Series is the only Chelsea PTO to offer all three of Chelsea's Wet Spline, SmartStart, and Quiet Gear solutions within a single platform.Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
