The Chelsea 823 Series Power Take-Off, part number 823XJAKP-A3XS or 823XJAKPA3XS, is a heavy-duty 8-bolt mechanical lever-shift PTO built for high-torque applications including oil field service, logging, pumper/cleaner trucks, and mining equipment. It mounts to automatic and manual transmissions from Eaton/Fuller, Volvo/Mack, Allison, and other manufacturers with an 8-bolt PTO aperture. The output shaft is a 1-1/2 inch 10-spline with a 1410 Series companion flange. Shaft power ratings are 48 HP at 500 RPM and 95 HP at 1000 RPM, with an intermittent torque rating of up to 500 lb-ft (check application pages for actual torque ratings for your specific installation). A cast iron housing and tapered cone bearings on the output shaft give the 823 Series its load-bearing capability. A genuine Chelsea part sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.

The Chelsea 823 Series is designed for the most demanding PTO applications. The series supports direct-mount pump outputs and is available with air shift or lever shift configurations. Seven internal speed ratios and four shift options provide application flexibility across oil field, logging, pumper/cleaner, and mining equipment. The 823 Series also accepts SAE C pump flange outputs in addition to the 1410 driveline companion flange. Parker Chelsea documentation available for this series includes the 823 Series Parts List, 823 Series Sales Literature, the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, and the Chelsea Power Take-Off General Information Catalog.
Features
8-Bolt mounting fits automatic and manual transmissions from Eaton/Fuller, Volvo/Mack, Allison, and others
Lever/mechanical shift type
1-1/2 inch 10-spline output shaft with 1410 Series companion flange
Intermittent torque rating up to 500 lb-ft / 678 Nm (verify actual rating on application pages)
Shaft power: 48 HP at 500 RPM, 95 HP at 1000 RPM
Extra heavy-duty cast iron housing with tapered cone bearings on output shaft for demanding applications including oil field, logging, and mining
Tech Specs
- Intermittent Torque: Up to 500 lb-ft / 678 Nm (check application pages for actual torque ratings)
- Shift Type: Lever, Mechanical
- Mounting Type: 8-Bolt
- Output Shaft Type: 1-1/2 inch - 10T Spline with 1410 Series Companion Flange
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 48 HP at 500 RPM, 95 HP at 1000 RPM (36 kW at 500 RPM, 71 kW at 1000 RPM)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Allison, and other 8-bolt aperture transmissions
- Continuous Operation: Yes, with 30% de-rating
Additional Information

The Chelsea 823 Series is designed for the most demanding PTO applications. The series supports direct-mount pump outputs and is available with air shift or lever shift configurations. Seven internal speed ratios and four shift options provide application flexibility across oil field, logging, pumper/cleaner, and mining equipment. The 823 Series also accepts SAE C pump flange outputs in addition to the 1410 driveline companion flange. Parker Chelsea documentation available for this series includes the 823 Series Parts List, 823 Series Sales Literature, the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, and the Chelsea Power Take-Off General Information Catalog.