The Chelsea 272MDAJP-R3RK is a 272 Series 6-bolt hot shift power take-off assembly designed for medium-duty truck applications. The 272 Series consolidates multiple earlier Chelsea PTO lines into one platform, offering up to 300 lb-ft of intermittent torque and continuous-duty capability. This assembly mounts via a 6-bolt pattern and is part of a series that supports both pneumatic and hydraulic shift options with an integral air control valve. Rotatable flanges add installation flexibility. Typical applications for the 272 Series include aerial, construction equipment, towing and recovery, and water truck service. Call us to confirm proper fit for your specific transmission and application.
Features
Chelsea 272 Series 6-bolt hot shift PTO assembly
Up to 300 lb-ft intermittent torque continuous-duty rated platform
Compatible with pneumatic or hydraulic shift configurations
Integral air control valve included
Rotatable flanges for flexible mounting orientation
Smart-Start option available for high-torque start-up conditions
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic or Hydraulic
- Intermittent Torque (Series): 201-300 lb-ft (401-500 Nm)
- Output Power (Series): 56+ HP (41-50 kW)
- Output Shaft Options (Series): Round Shaft 1 in. with 1/4 in. key, or Round Shaft 1-1/4 in. with 5/16 in. key
- Lubricant Options: X = No Pressure Lube, P = Pressure Lube, W = Wet Spline
- Part Number: 272MDAJP-R3RK or 272MDAJPR3RK
Additional Information
The Chelsea 272 Series was developed to replace and consolidate the earlier 230, 231, 236, 238, 270, and 271 Series PTOs into a single medium-duty platform. The series offers nine speed ratios and eighteen shift options, making it adaptable across a broad range of chassis and pump combinations. Wet-Spline technology is available on direct-mount configurations to extend PTO and pump shaft service life. The Smart-Start feature is designed for applications that demand high torque at engagement. Markets served by the 272 Series include aerial work, construction equipment, defense, material handling, water drilling, and towing and recovery. Part number 272MDAJP-R3RK is also referenced as SP272MDAJP-R3RK. NMFC classification: 128520, class 77.5 (Hydraulic PTOs, Pumps, Motors).Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
