The Chelsea 282GDAJX-13RK or 282GDAJX13RK is a medium-duty hot-shift PTO assembly from the Chelsea 282 Series, engineered for continuous-duty cycles in demanding mobile equipment applications. It mounts via an 8-bolt pattern and accepts pneumatic or PowerShift (pneumatic/hydraulic) actuation, fitting transmissions from Allison, Eaton/Fuller, Volvo/Mack, and other manufacturers. The 1-1/4" round output shaft uses a 5/16" key drive. Intermittent torque capacity runs 201-300 lb-ft (401-500 Nm), with shaft power output of 29 HP at 500 RPM and 57 HP at 1,000 RPM. Common applications include aerial work trucks, towing and recovery, fuel oil delivery, water trucks, and construction equipment. An integral air valve and rotatable flanges simplify installation. Call us to confirm proper fit for your specific transmission and application.

The 282 Series combines the Chelsea 238 Series lineage with upgraded moving parts rated to withstand up to 300 lb-ft in continuous or intermittent duty. The series offers nine speed ratios and eighteen shift options. Direct-mount configurations support the optional Wet-Spline lubrication system for longer PTO and pump shaft life; driveshaft output configurations include a positive stop to prevent seal damage from driveshaft yokes. Typical markets include aerial, construction equipment, towing and recovery, fuel oil delivery, and water trucks.
Features
8-Bolt mounting pattern compatible with Allison, Eaton/Fuller, Volvo/Mack, and other transmission manufacturers
Pneumatic or PowerShift (pneumatic/hydraulic) shift with integral air valve included
1-1/4" round output shaft with 5/16" key drive
Intermittent torque rating: 201-300 lb-ft (401-500 Nm); shaft power: 29 HP at 500 RPM, 57 HP at 1,000 RPM
Rotatable flanges for flexible installation orientation
Smart Start option for high-torque start-up; Wet-Spline option available for extended shaft life
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: Up to 300 lb-ft / 407 Nm (check application pages for actual torque ratings)
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- Mounting Type: 8-Bolt
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, and other manufacturers
- Output Power: 41-50 kW / 56+ HP
- Shaft Power: 29 HP (500 RPM) / 57 HP (1,000 RPM) | 21 kW (500 RPM) / 43 kW (1,000 RPM)
Additional Information

The 282 Series combines the Chelsea 238 Series lineage with upgraded moving parts rated to withstand up to 300 lb-ft in continuous or intermittent duty. The series offers nine speed ratios and eighteen shift options. Direct-mount configurations support the optional Wet-Spline lubrication system for longer PTO and pump shaft life; driveshaft output configurations include a positive stop to prevent seal damage from driveshaft yokes. Typical markets include aerial, construction equipment, towing and recovery, fuel oil delivery, and water trucks.
Parts manual and diagrams: Chelsea 282 Series PTO parts list with prices
