Chelsea 267 Series PTO

Quality recognizes quality — which is why Allison partnered with Chelsea engineers to design PTOs purpose-built for Allison World Transmissions.

The Chelsea 267 Series is a versatile constant-mesh PTO that delivers greater torque capacity than a traditional 6-bolt model while maintaining the tight sealing advantages of a 10-bolt pattern.

Ideal for variable displacement piston pumps in demanding applications such as refuse collection and snow and ice removal, the 267 Series offers five speed ratios and multiple output options, including Chelsea’s popular 360° rotatable flange for flexible installation.

For even higher performance, the SuperTorque™ option increases torque capacity by up to 20% over the standard model—making the 267 Series a durable, high-output solution trusted across the toughest mobile hydraulic applications.

Technical Specifications

• Output Type: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Intermittent Torque: 301 to 400 lb-ft, 401 to 500 Nm, 335 lb-ft (Check Application Pages for Actual Torque Ratings), 454 Nm (Check Application Pages for Actual Torque Ratings)
• Transmission Manufacturer: Allison
• Mounting Type: 10-Bolt
• Lubricant: P = Pressure Lube, W = Wet Spline
• Output Shaft Type: 1-1/4″ Tapered Output Shaft W/ Keyway, Round Shaft (1-1/4″ – 5/16″ Key), SAE B (7/8″ – 13T) Pump Spline, SAE C (1-1/4″ – 14T) Pump Spline, SAE A (5/8″ – 9T) Pump Spline, DIN 5462 Pump Spline, 3/4″ – 11T Pump Spline, SAE BB (1″ – 15T) Pump Spline
• Output Power: 56+ HP, 41 to 50 kW
  Continuous Operation: Yes with 30% de-rating
• Shift Type: Constant Mesh
• Shaft Power: 32 HP (500 RPM), 64 HP (1000 RPM), 24 kW (500 RPM), 48 kW (1000 RPM)
• Weight: 35 lb, 16 kg

Key Benefits

• Rotatable Flanges to improve clearance
• Super Torque™ Gears available for extra power
• Wet Spline or Greaseable Shafts to extend PTO & Pump shaft life
• Two-Year Warranty

Examples of Suitable Applications

• Snowplow Trucks
• Small Refuse Trucks
• Yard Jockey Trucks