The Chelsea 252 Series Power Take-Off Assembly, part number 252GDHVP-B5XE or 252GDHVPB5XE, is a hydraulic-shift, 6-bolt PTO designed for Allison and RAM automatic transmissions. Output is delivered through a 1-inch round shaft with keyway. Intermittent torque is rated at 120 lb-ft (163 Nm); check Chelsea application pages for your specific installation. Shaft power runs 11 HP at 500 RPM and 23 HP at 1000 RPM, with a ceiling of 25 HP continuous output. The integrated cartridge valve and single-hose connection simplify installation considerably, and weather-tight electrical connectors protect against moisture intrusion. The controlled compression interface gasket ensures a consistent, leak-resistant seal at the transmission face. Call us to confirm proper fit for your application.

The Chelsea 252 Series is designed for use on Allison 1000/2000/2400 series automatic transmissions and RAM trucks with compatible automatic transmissions. The compact housing is sized to fit through a floor access panel without dropping the exhaust system. Compatible Parker pumps covering flows from 1.6 gpm to 8.2 gpm at 1000 RPM are available and can be ordered with the PTO as a single part number. Typical applications include tow and recovery, tire service trucks, dump trucks, and aerial equipment. Also referenced as CHE-252GDHVP-B5XE and CHE252GDHVPB5XE.
Features
Hydraulic shift operation with single hose connection and integrated cartridge valve
6-bolt mounting for Allison and RAM automatic transmissions
1-inch round output shaft with keyway
Intermittent torque: 120 lb-ft (163 Nm), verify against Chelsea application pages for your installation
Shaft power: 11 HP at 500 RPM, 23 HP at 1000 RPM (25 HP maximum)
Weather-tight electrical connectors and controlled compression interface gasket
Tech Specs
- Shift Type: Hydraulic
- Mounting Type: 6-Bolt
- Transmission Manufacturer: Allison, RAM
- Output Shaft Type: 1" Round with Keyway
- Intermittent Torque: 120 lb-ft / 163 Nm (check application pages for actual torque ratings; range 101-200 lb-ft / 101-200 Nm)
- Output Power: 25 HP and below / 20 kW and below
- Shaft Power: 11 HP at 500 RPM, 23 HP at 1000 RPM / 9 kW at 500 RPM, 17 kW at 1000 RPM
Additional Information

The Chelsea 252 Series is designed for use on Allison 1000/2000/2400 series automatic transmissions and RAM trucks with compatible automatic transmissions. The compact housing is sized to fit through a floor access panel without dropping the exhaust system. Compatible Parker pumps covering flows from 1.6 gpm to 8.2 gpm at 1000 RPM are available and can be ordered with the PTO as a single part number. Typical applications include tow and recovery, tire service trucks, dump trucks, and aerial equipment. Also referenced as CHE-252GDHVP-B5XE and CHE252GDHVPB5XE.
