The Chelsea 852 Series Power Take-Off Assembly, part number 852XJAKP-B4XV or 852XJAKPB4XV, is a Hydraulic PowerShift PTO engineered for Allison automatic transmissions with 8-bolt PTO mounting apertures. Output is delivered through a 1-1/2"-10T spline with a 1410 series companion flange. Shaft power reaches 48 HP at 500 RPM and 95 HP at 1000 RPM. Intermittent torque is rated up to 500 lb-ft (check application pages for actual torque ratings). The cast iron housing, heavy-duty ball bearings on the output shaft, and a large clutch pack give this unit a long service life in demanding vocational work. Applications include oil field, bulk transporter, and fire and rescue equipment. Call us to confirm proper fit for your specific transmission and application.

• Transmission Manufacturer: Allison
• Mounting Type: 8-Bolt
• Shift Type: Hydraulic PowerShift
• Output Shaft Type: 1410 Series Companion Flange, 1-1/2" - 10T Spline
• Intermittent Torque: Up to 500 lb-ft / 678 Nm (Check Application Pages for Actual Torque Ratings)
• Output Power: 56+ HP, 51+ kW
• Shaft Power: 48 HP (500 RPM), 95 HP (1000 RPM); 36 kW (500 RPM), 71 kW (1000 RPM)
• Lubrication: Pressure Lube Standard
• Continuous Operation: Yes, with 30% de-rating

The Chelsea 852 Series is suited for oil field operations, bulk transporter trucks, and fire and rescue vehicles. Three internal speed ratios and three output options give this series broad versatility across heavy-duty vocational and municipal equipment. Refer to Parker Chelsea application pages to confirm the correct torque rating for your specific installation.