The Chelsea 812XKAHX-A3XD or 812XKAHXA3XD is a single-gear power take-off assembly from the Chelsea 812 Series, designed to fit most manual transmissions with an 8-bolt mounting aperture. The 812 Series is characterized by a low-profile cast iron housing built for extra heavy-duty applications including dump trucks, tow and recovery, and aerial devices. This unit uses wire/cable mechanical shift and features a round shaft output with a 1-inch, 1/4-inch key configuration. The 812 Series carries an intermittent torque rating of 400 lb-ft and output power of 56-plus HP. Note: Parker Chelsea lists the 812 Series as obsolete. Call us to confirm parts availability and proper fit for your application.

• Mounting Type: 8-Bolt
• Shift Type: Wire/Cable, Mechanical
• Output Shaft Type: Round Shaft, 1" diameter with 1/4" key
• Intermittent Torque Rating (Series): 400 lb-ft (542 Nm)
• Output Power (Series): 56+ HP (51+ kW)
• Housing Material: Cast Iron
• Series Status: Obsolete (Parker Chelsea 812 Series no longer in production)

The Chelsea 812 Series was a low-profile, single-gear PTO engineered for extra heavy-duty vocational truck applications. The 8-bolt mounting pattern was designed to fit most manual transmissions, and the cast iron housing provided durability in demanding mobile and aerial markets. Chelsea offered five shift options and seven output configurations within this series, including a 360-degree rotatable flange for direct-mount pump fitment. Parker Chelsea now lists the 812 Series as obsolete and no longer available as a current production line. If you are sourcing this part for a repair or replacement, contact Pro Gear and Transmission to discuss availability and confirm the correct fit for your specific transmission and application.