The Chelsea 252 Series Power Take-Off Assembly, part number 252DDKUX-B51126 or 252DDKUXB51126, is a hydraulic-shift PTO built for Allison 1000/2000/2400 series automatic transmissions and Dodge/RAM truck applications. It mounts via a 6-bolt pattern and delivers up to 25 HP (20 kW) output, with shaft power rated at 11 HP (500 RPM) and 23 HP (1000 RPM). The 1-inch round output shaft uses a keyed connection. Intermittent torque for this series is rated at 101-200 lb-ft (101-200 Nm); check application pages for the specific 120 lb-ft (163 Nm) torque rating. The compact housing is designed to fit through a floor access panel without dropping the exhaust, cutting installation time. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
The Chelsea 252 Series is designed for vocational applications including tow and recovery, tire service trucks, dump trucks, and aerial equipment. The compact housing slips through the floor access panel, eliminating the need to drop the exhaust system during installation. An integrated cartridge valve and single-hose connection reduce installation complexity compared to remote solenoid setups. Controlled Compression Interface Gasket ensures a consistent seal at the mounting face. Parker also offers a range of compatible pumps with flows from 1.6 gpm to 8.2 gpm at 1000 RPM, and the PTO and pump can be ordered together under one part number.
Features
Hydraulic shift operation
6-bolt mounting pattern
1-inch round output shaft with key
Intermittent torque: 101-200 lb-ft (101-200 Nm); series reference 120 lb-ft (163 Nm) - verify application
Output power up to 25 HP (20 kW); shaft power 11 HP at 500 RPM, 23 HP at 1000 RPM
Single hose connection with integrated cartridge valve and weather-tight electrical connectors
Tech Specs
- Shift Type: Hydraulic
- Mounting Type: 6-Bolt
- Output Shaft Type: 1" Round with Key
- Output Power: 25 HP (20 kW) and below
- Shaft Power: 11 HP (9 kW) at 500 RPM, 23 HP (17 kW) at 1000 RPM
- Intermittent Torque: 101-200 lb-ft (101-200 Nm); series-level reference rating 120 lb-ft (163 Nm) - check application pages for actual torque
- Transmission Compatibility: Allison 1000/2000/2400 series, RAM (Aisin automatic)
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The Chelsea 252 Series is designed for vocational applications including tow and recovery, tire service trucks, dump trucks, and aerial equipment. The compact housing slips through the floor access panel, eliminating the need to drop the exhaust system during installation. An integrated cartridge valve and single-hose connection reduce installation complexity compared to remote solenoid setups. Controlled Compression Interface Gasket ensures a consistent seal at the mounting face. Parker also offers a range of compatible pumps with flows from 1.6 gpm to 8.2 gpm at 1000 RPM, and the PTO and pump can be ordered together under one part number.
