The Chelsea 272 Series Power Take-Off Assembly, part number 272MDAJP-K5RK or 272MDAJPK5RK, is a 6-bolt hot-shift PTO built for medium-duty applications including towing and recovery, aerial work, construction equipment, and water trucks. It features a 1-1/4" round output shaft with a 5/16" key and is compatible with a wide range of transmission manufacturers including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM. Shift is pneumatic or PowerShift (pneumatic/hydraulic). Continuous torque is rated at 300 lb-ft (407 Nm); intermittent torque falls in the 201-300 lb-ft (401-500 Nm) range. Output power is rated at 56+ HP (41-50 kW). The 272 Series consolidates several earlier Chelsea PTO lines, including the 230, 231, 236, 238, 270, and 271 Series, into a single versatile platform. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting for broad transmission compatibility across Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM
Pneumatic or PowerShift (pneumatic/hydraulic) shift operation with integral air control valve
1-1/4" round output shaft with 5/16" key
Continuous torque rated at 300 lb-ft (407 Nm); intermittent torque 201-300 lb-ft (401-500 Nm)
Output power 56+ HP (41-50 kW); shaft power 29 HP at 500 RPM, 57 HP at 1,000 RPM
Rotatable flanges and optional Wet-Spline design for extended PTO and pump shaft service life
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic, PowerShift (Pneumatic/Hydraulic)
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Continuous Torque: 300 lb-ft / 407 Nm (verify actual rating on application pages)
- Intermittent Torque: 201-300 lb-ft / 401-500 Nm
- Output Power: 56+ HP / 41-50 kW
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Transmission Compatibility: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, Other
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 Series into a single medium-duty hot-shift PTO platform. The series offers nine speed ratios and eighteen shift options. Direct-mount configurations are available with optional Wet-Spline technology for longer PTO and pump shaft service life. Driveshaft output configurations include the Smart-Start option, designed for high-torque start-up conditions. Typical markets served include aerial lift, towing and recovery, construction equipment, water trucks, and material handling. Part number 272MDAJP-K5RK is sold by Pro Gear and Transmission. Call us to confirm the right fit for your specific transmission and application.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
