The Chelsea 272 Series Power Take-Off Assembly, part number 272XBAJP-G3RK or 272XBAJPG3RK, is a 6-bolt hot-shift PTO designed for medium-duty commercial applications including aerial work, construction equipment, towing and recovery, and water trucks. The 272 Series consolidates several earlier Chelsea PTO lines into a single, broad-coverage unit offering nine speed ratios and eighteen shift options. This assembly features a 1-1/4" round output shaft with a 5/16" key, pneumatic or PowerShift (pneumatic/hydraulic) engagement, and a continuous torque rating of 300 lb-ft (407 Nm). Shaft power output reaches 57 HP at 1,000 RPM. Compatible transmission manufacturers include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms. Call us to confirm proper fit for your application.
Features
6-bolt mounting configuration for medium-duty transmission applications
1-1/4" round output shaft with 5/16" key
Pneumatic or PowerShift (pneumatic/hydraulic) engagement with integral air control valve
Continuous torque rating: 300 lb-ft (407 Nm); intermittent torque: 201-300 lb-ft (401-500 Nm)
Shaft power output: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
Compatible with Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM transmissions
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
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Output Power: 56+ HP (41-50 kW)
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- Shaft Power at 500 RPM: 29 HP (21 kW)
- Shaft Power at 1,000 RPM: 57 HP (43 kW)
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM
Additional Information
The Chelsea 272 Series replaces and consolidates 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 one of the most broadly configurable 6-bolt hot-shift PTOs available for medium-duty vocational trucks. Direct-mount configurations are available with optional Wet-Spline technology for extended PTO and pump shaft service life. Driveshaft output configurations include the Smart-Start option, designed for high-torque engagement conditions. The integral air control valve is included with the assembly. Typical markets served by the 272 Series include aerial lift, construction equipment, towing and recovery, water trucks, material handling, and defense. Part number 272XBAJP-G3RK is also referenced as SP272XBAJP-G3RK in some catalog listings.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
