The Chelsea 272 Series power take-off assembly, part number 272ZMJWX-A5BD or 272ZMJWXA5BD, is a 6-bolt hot shift PTO built for medium-duty mobile equipment applications. The 272 Series supports intermittent torque ratings from 201 to 300 lb-ft (401-500 Nm) and is available with either pneumatic or hydraulic shift. The integral air control valve is included in the assembly. Flanges are rotatable for flexible installation, and a Wet-Spline output option extends PTO and pump shaft service life. The 272 Series consolidates the former 230, 231, 236, 238, 270, and 271 PTO lines into a single, versatile platform used in aerial, construction, towing and recovery, and water truck applications. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting configuration for medium-duty hot shift applications
Intermittent torque rating: 201-300 lb-ft (401-500 Nm)
Pneumatic or hydraulic shift with integral air control valve
Rotatable flanges allow flexible output positioning at installation
Wet-Spline output option available for extended PTO and pump shaft life
Smart-Start capability for high-torque start-up conditions
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic or Hydraulic
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Output Power: 56+ HP (41-50 kW)
- Output Shaft Options: Round Shaft 1 in. with 1/4 in. key; Round Shaft 1-1/4 in. with 5/16 in. key
- Lubricant Codes: X = No Pressure Lube, P = Pressure Lube, W = Wet Spline
- Part Number: 272ZMJWX-A5BD or 272ZMJWXA5BD
Additional Information
The Chelsea 272 Series was designed to replace and consolidate six earlier Chelsea PTO lines: the 230, 231, 236, 238, 270, and 271 Series. The platform offers nine speed ratios and eighteen shift options, covering the most common direct-mount and driveshaft output configurations. Direct-mount outputs are available with the optional Wet-Spline interface, which reduces wear on the PTO output shaft and hydraulic pump shaft. Driveshaft outputs can be specified with the Smart-Start feature, which manages engagement under high-torque start-up loads. Typical markets include aerial work platforms, construction equipment, towing and recovery, water trucks, and material handling. Part number 272ZMJWX-A5BD is also referenced as SP272ZMJWX-A5BD. The 272 Series is classified under NMFC code 128520 (Hydraulic PTOs, Pumps, Motors, etc.).Parts manual and diagrams: Chelsea 272 Series PTO parts list with prices
