The Chelsea 252 Series Power Take-Off Assembly, part number 252DMKUX-B5XE or 252DMKUXB5XE, is a hydraulic-shift PTO built for Allison 1000/2000/2400 series automatic transmissions and RAM truck applications with compatible Aisin automatic transmissions. It mounts via a 6-bolt pattern and uses a 1-inch round output shaft with key. Intermittent torque rating falls in the 101-200 lb-ft range; verify actual torque against the application pages before ordering. Output power is rated at 25 HP and below at the shaft (11 HP at 500 RPM, 23 HP at 1000 RPM). Installation is simplified by an integrated cartridge valve that eliminates remote solenoids and reduces the hydraulic plumbing to a single hose connection. Call us to confirm proper fit for your specific transmission and chassis.

• Shift Type: Hydraulic
• Mounting Type: 6-Bolt
• Output Shaft Type: 1" Round with Key
• Intermittent Torque: 101-200 lb-ft / 101-200 Nm (120 lb-ft / 163 Nm reference - check application pages for actual torque rating)
• 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)
• Transmission Compatibility: Allison, RAM
• Continuous Operation: Yes, with 30% de-rating

The Chelsea 252 Series housing is designed to pass through a floor access panel, so dropping the exhaust system is not required during installation. A range of compatible Parker pumps is available separately, with flows from 1.6 gpm to 8.2 gpm at 1000 RPM. The PTO and pump can be ordered together as a single part number. Typical applications include tow and recovery, tire service trucks, dump trucks, and aerial equipment.