The Chelsea 272 Series power take-off assembly, part number 272MDAJP-D3RK or 272MDAJPD3RK, is a 6-bolt hot shift PTO designed for medium-duty truck applications. This series supports intermittent torque ratings from 201 to 300 lb-ft and continuous-duty operation with an approved de-rate. Shift options include pneumatic and hydraulic, with an integral air control valve included. The 272 Series consolidates the 230, 231, 236, 238, 270, and 271 series into a single platform, offering nine speed ratios and eighteen shift configurations. Output shaft options in the series include a 1-inch round shaft with 1/4-inch key and a 1-1/4-inch round shaft with 5/16-inch key. Common applications include aerial equipment, construction, towing and recovery, and water trucks. Pro Gear and Transmission supplies genuine Chelsea PTO assemblies. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting, hot shift design compatible with pneumatic or hydraulic actuation
Integral air control valve included with assembly
Intermittent torque rating: 201 to 300 lb-ft (401 to 500 Nm)
Continuous-duty torque rating available with approved application de-rate
Consolidates multiple legacy series: replaces 230, 231, 236, 238, 270, and 271 series
Nine available speed ratios and eighteen shift configurations within the 272 platform
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic or Hydraulic
- Intermittent Torque: 201 to 300 lb-ft (401 to 500 Nm)
- Output Shaft Options: 1-inch round shaft with 1/4-inch key; 1-1/4-inch round shaft with 5/16-inch key
- Output Power: 56+ HP (41 to 50 kW)
- Speed Ratios Available: 9
- Shift Configurations Available: 18
- Lubricant Code: P = Pressure Lube
Additional Information
The Chelsea 272 Series replaces the 230, 231, 236, 238, 270, and 271 Series PTOs, making it a direct consolidation platform for medium-duty hot shift applications. Wet-Spline technology is available on direct-mount outputs for extended PTO and pump shaft service life. Smart-Start is available on driveshaft outputs to handle high-torque start-up conditions. The 272 Series is used across aerial, construction, towing and recovery, defense, material handling, water drilling, and other mobile equipment markets. Rotatable flanges allow flexible installation orientation. Part number 272MDAJP-D3RK is also referenced as SP272MDAJP-D3RK in some catalog systems. Call Pro Gear and Transmission to confirm this assembly matches your transmission model and output requirements.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
