The Chelsea 272ACKUP-D5RK or 272ACKUPD5RK is a 272 Series hot shift power take-off assembly built on a 6-bolt mounting pattern. 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. It consolidates the earlier 230, 231, 236, 238, 270, and 271 series into a single platform, offering nine speed ratios and eighteen shift configurations. The series includes an integral air control valve and features rotatable flanges for installation flexibility. Output shaft options include round shafts in 1-inch and 1-1/4-inch configurations. Applications span aerial work, construction equipment, water trucks, and towing and recovery. Call us to confirm proper fit for your transmission.
Features
6-bolt mounting pattern, medium duty hot shift design
Intermittent torque rating: 201-300 lb-ft (401-500 Nm)
Pneumatic or hydraulic shift with integral air control valve
Nine speed ratios and eighteen shift configurations
Rotatable flanges for flexible installation
Consolidates Chelsea 230, 231, 236, 238, 270, and 271 series into one platform
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. with 1/4 in. key, or Round Shaft - 1-1/4 in. with 5/16 in. key
- Speed Ratios: 9 available
- Shift Configurations: 18 available
- Lubricant Options: No Pressure Lube, Pressure Lube, or Wet Spline
Additional Information
The Chelsea 272 Series was developed to consolidate and supersede six earlier Chelsea medium duty PTO lines: the 230, 231, 236, 238, 270, and 271 series. In addition to standard direct mount and driveshaft outputs, the 272 Series offers the optional Wet-Spline configuration for extended PTO and pump shaft service life, and a Smart Start option designed to handle high-torque start-up conditions. Common markets include aerial, construction equipment, water trucks, towing and recovery, and defense applications.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
