The Chelsea 272 Series Power Take-Off Assembly, part number 272ZKAJX-P3RK or 272ZKAJXP3RK, is a 6-bolt hot shift PTO designed for medium-duty applications including towing and recovery, aerial work, construction equipment, and water trucks. It mounts with a 6-bolt pattern and shifts via pneumatic or PowerShift (pneumatic/hydraulic) actuation with an integral air control valve. The output shaft is a 1-1/4" round shaft with a 5/16" key. Continuous torque capability reaches 300 lb-ft (407 Nm), with intermittent torque rated at 201-300 lb-ft (401-500 Nm). Output power exceeds 56 HP (41-50 kW). The 272 Series consolidates several earlier Chelsea PTO series into one versatile platform. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting pattern for broad transmission compatibility including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM
Pneumatic and PowerShift (pneumatic/hydraulic) shift options with integral air control valve
1-1/4" round output shaft with 5/16" key
Continuous torque rating up to 300 lb-ft (407 Nm); intermittent torque 201-300 lb-ft (401-500 Nm)
Output power rated at 56+ HP (41-50 kW)
Suited for aerial, towing and recovery, construction equipment, and water truck applications
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: Up to 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)
- Shaft Power at 500 RPM: 29 HP (21 kW); at 1000 RPM: 57 HP (43 kW)
- Shift Type: Pneumatic / PowerShift (Pneumatic/Hydraulic)
- Compatible Transmission Manufacturers: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and others
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 PTO series into a single medium-duty platform. It offers 9 speed ratios and 18 shift options. 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, engineered for high-torque start-up conditions with rotatable flanges for flexible installation. This part number features pressure lube (P designation) as indicated in the suffix code.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
