The Chelsea 252 Series Power Take-Off, part number 252RMKUX-B5P82 or 252RMKUXB5P82, is a hydraulic-shift PTO built for Allison 1000/2000/2400 series automatic transmissions and RAM trucks with Aisin automatic transmissions. It mounts via a 6-bolt pattern and delivers power through a 1-inch round output shaft with a 1/4-inch key. Shaft power output is rated at 11 HP (500 RPM) and 23 HP (1000 RPM), with intermittent torque up to 120 lb-ft (163 Nm); check application pages for actual torque ratings for your specific installation. The 252 Series design integrates a cartridge valve and uses a single hydraulic hose connection, reducing installation time compared to setups requiring remote solenoids and multiple hoses. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
The Chelsea 252 Series is designed for vocational and municipal equipment applications including tow and recovery, tire service trucks, dump trucks, and aerial units. The compact housing is engineered to fit through a floor access panel without requiring exhaust system removal, a practical advantage during installation. The series supports a range of Parker pump options with flows from 1.6 gpm to 8.2 gpm at 1000 RPM; PTO and pump can be ordered together under a single part number.
Features
Hydraulic shift with single hose connection and integrated cartridge valve
6-bolt mounting pattern
1-inch round output shaft with 1/4-inch key
Intermittent torque: up to 120 lb-ft (163 Nm) - check application pages for actual torque ratings
Shaft power: 11 HP at 500 RPM, 23 HP at 1000 RPM
Weather-tight electrical connectors and controlled compression interface gasket
Compatible with Allison 1000/2000/2400 series and RAM/Aisin automatic transmissions
Tech Specs
- Shift Type: Hydraulic
- Mounting Type: 6-Bolt
- Output Shaft Type: 1" Round with 1/4" Key
- Intermittent Torque: 120 lb-ft / 163 Nm (Check Application Pages for Actual Torque Ratings)
- Output Power: 25 HP and below / 20 kW and below
- Shaft Power: 11 HP (500 RPM), 23 HP (1000 RPM) / 9 kW (500 RPM), 17 kW (1000 RPM)
- Transmission Manufacturer: Allison, RAM
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The Chelsea 252 Series is designed for vocational and municipal equipment applications including tow and recovery, tire service trucks, dump trucks, and aerial units. The compact housing is engineered to fit through a floor access panel without requiring exhaust system removal, a practical advantage during installation. The series supports a range of Parker pump options with flows from 1.6 gpm to 8.2 gpm at 1000 RPM; PTO and pump can be ordered together under a single part number.
Parts Manual: Chelsea 252 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
