The Chelsea 272 Series power take-off assembly, part number 272XAAJX-B3XD or 272XAAJXB3XD, is a 6-bolt hot shift PTO designed for medium-duty truck applications including towing and recovery, aerial, construction equipment, and water trucks. The 272 Series supports intermittent torque ratings from 201 to 300 lb-ft (401 to 500 Nm) and delivers 56 or more horsepower output. Shift options include pneumatic (air) or hydraulic, and the series features an integral air control valve with rotatable flanges. Output shaft options cover 1-inch round shaft with 1/4-inch key and 1-1/4-inch round shaft with 5/16-inch key. The 272 Series consolidates several earlier Chelsea PTO lines into one platform with nine available speed ratios and 18 shift configurations. Call us to confirm proper fit for your application.
Features
6-bolt mounting configuration for medium-duty hot shift applications
Intermittent torque rating: 201 to 300 lb-ft (401 to 500 Nm)
Output power: 56+ HP (41 to 50 kW)
Pneumatic (air) or hydraulic shift with integral air control valve
Output shaft options: 1-inch round with 1/4-inch key or 1-1/4-inch round with 5/16-inch key
Rotatable flanges; nine available speed ratios across 18 shift configurations
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic (Air) or Hydraulic
- Integral Air Control Valve: Yes
- Intermittent Torque: 201 to 300 lb-ft (401 to 500 Nm)
- Output Power: 56+ HP (41 to 50 kW)
- Output Shaft Options: 1-inch round shaft with 1/4-inch key; 1-1/4-inch round shaft with 5/16-inch key
- Speed Ratios Available: 9
- Shift Configurations Available: 18
- Lubricant Code X: No Pressure Lube; Code P: Pressure Lube; Code W: Wet Spline
- NMFC Code: 128520 (Hydraulic PTOs, Pumps, Motors)
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 Series PTOs into a single updated platform. Moving components are rated to handle 300 lb-ft intermittently or continuously. Direct mount output options include an optional Wet-Spline design for extended PTO and pump shaft service life. Driveshaft output configurations can include the Smart-Start feature, suited for high-torque start-up conditions. Common market applications include aerial equipment, construction equipment, towing and recovery, water trucks, material handling, and defense vehicles.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
