The Chelsea 272MAAJP-B5SD is a 272 Series 6-bolt hot shift Power Take-Off assembly designed for medium-duty applications including aerial, construction equipment, towing and recovery, and water trucks. The 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 series into a single versatile platform, offering nine speed ratios and eighteen shift options. This unit supports pneumatic or hydraulic shift with an integral air control valve, and the series is rated for intermittent torque of 201-300 lb-ft (401-500 Nm) with output power exceeding 56 HP. Rotatable flanges and a Smart-Start option for high-torque start-up conditions make this series adaptable across a wide range of direct-mount and driveshaft output configurations. Call us to confirm proper fit for your application.
Features
Chelsea 272 Series 6-bolt hot shift PTO assembly
Intermittent torque rating: 201-300 lb-ft (401-500 Nm)
Output power: 56+ HP (41-50 kW)
Pneumatic or hydraulic shift with integral air control valve
Rotatable flanges for flexible installation
Smart-Start option supports 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 Type: Round Shaft (1 in. - 1/4 in. Key) or Round Shaft (1-1/4 in. - 5/16 in. Key)
- Speed Ratios Available (Series): 9
- Shift Options Available (Series): 18
- NMFC Code: 128520 - Hydraulic PTOs, Pumps, Motors, etc.
Additional Information
The Chelsea 272 Series consolidates several earlier Chelsea medium-duty hot shift PTO series - including the 230, 231, 236, 238, 270, and 271 - into one platform. Common applications for the 272 Series include aerial lifts, construction equipment, towing and recovery vehicles, and water trucks. The series supports a Wet-Spline option for extended PTO and pump shaft life on direct-mount configurations, and a Smart-Start option is available for driveshaft outputs under high-torque start-up conditions. Part number 272MAAJP-B5SD or 272MAAJPB5SD is also referenced as SP272MAAJP-B5SD. Sold by Pro Gear and Transmission.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
