The Chelsea 282XKAJX-A5RS or 282XKAJXA5RS is a medium-duty hot-shift PTO assembly from the Chelsea 282 Series, compatible with Allison, Eaton/Fuller, Volvo/Mack, and other transmission applications. It mounts via an 8-bolt pattern and uses a 1-1/4" round output shaft with a 5/16" key. Shift is pneumatic or PowerShift (pneumatic/hydraulic) with an integral air valve built into the unit. Intermittent torque rating is 201-300 lb-ft (401-500 Nm); the 282 Series carries a continuous-duty torque rating up to 300 lb-ft. Shaft power output is 29 HP at 500 RPM and 57 HP at 1,000 RPM. The 282 Series is used across aerial, construction, towing and recovery, water truck, and fuel oil delivery applications. Call us to confirm proper fit for your transmission and application.

The Chelsea 282 Series replaces and improves upon the 238 Series design, combining upgraded moving parts to handle up to 300 lb-ft intermittent or continuous. The series offers 9 speed ratios, 18 shift options, and the most popular direct-mount and driveshaft output configurations. Direct-mount options support optional wet-spline technology for extended PTO and pump shaft life. Driveshaft outputs include a positive stop to prevent seal damage from driveshaft yokes. Typical market applications include aerial lifts, construction equipment, towing and recovery, water trucks, and home fuel oil delivery trucks.
Features
8-bolt mounting pattern fits Allison, Eaton/Fuller, Volvo/Mack, and other transmissions
1-1/4" round output shaft with 5/16" key
Pneumatic or PowerShift (pneumatic/hydraulic) shift with integral air valve
Continuous-duty torque rating up to 300 lb-ft (407 Nm); intermittent rating 201-300 lb-ft
Shaft power: 29 HP at 500 RPM, 57 HP at 1,000 RPM
Smart Start option for high-torque start-up; rotatable flanges; wet-spline option available
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: 300 lb-ft (407 Nm) - Check Application Pages for Actual Torque Ratings
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Mounting Type: 8-Bolt
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- Output Power: 56+ HP (41-50 kW)
- Shaft Power: 29 HP at 500 RPM, 57 HP at 1,000 RPM (21 kW at 500 RPM, 43 kW at 1,000 RPM)
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, and Other
Additional Information

The Chelsea 282 Series replaces and improves upon the 238 Series design, combining upgraded moving parts to handle up to 300 lb-ft intermittent or continuous. The series offers 9 speed ratios, 18 shift options, and the most popular direct-mount and driveshaft output configurations. Direct-mount options support optional wet-spline technology for extended PTO and pump shaft life. Driveshaft outputs include a positive stop to prevent seal damage from driveshaft yokes. Typical market applications include aerial lifts, construction equipment, towing and recovery, water trucks, and home fuel oil delivery trucks.
Parts Manual: Chelsea 282 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
