The Chelsea 852 Series Power Take-Off, part number 852XBAKP-B4XV or 852XBAKPB4XV, is a Hydraulic PowerShift PTO built for Allison automatic transmissions with 8-bolt PTO mounting apertures. The output shaft is a 1-1/2 inch, 10-tooth spline fitted with a 1410 series companion flange, making it compatible with standard driveline connections. Intermittent torque capacity reaches up to 500 lb-ft (check application pages for your specific rating). Shaft power output is rated at 48 HP at 500 RPM and 95 HP at 1000 RPM. The 852 Series cast iron housing and heavy-duty ball bearings on the output shaft give this unit its durability in oil field, bulk transport, fire and rescue, and vocational equipment service. Call us to confirm proper fit for your application.

• Transmission Manufacturer: Allison
• Mounting Type: 8-Bolt
• Shift Type: Hydraulic PowerShift
• Output Shaft Type: 1-1/2 in. - 10T Spline with 1410 Series Companion Flange
• 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)
• Continuous Operation: Yes, with 30% de-rating
• Lubrication: Pressure Lubrication Standard

The Chelsea 852 Series is used across Oil and Gas, Mobile, and Vocational and Municipal Equipment markets. Typical applications include oil field service vehicles, bulk transporter trucks, and fire and rescue apparatus. Parker publishes a dedicated 852 Series Parts List (HY25-2852-M1_US) and an Owner's Manual covering the 272/282/852/885 Series - contact Pro Gear and Transmission for help identifying the correct internal ratio or output configuration for your specific Allison transmission model.