Chelsea part number 267SMFJW-M5AK or 267SMFJWM5AK is a 267 Series Power Take-Off assembly built on a 10-bolt mounting pattern for Allison automatic transmissions. It operates as a constant mesh PTO, making it well suited for mobile applications that demand continuous power delivery, such as yard jockey trucks, small refuse trucks, and snow and ice removal equipment. Intermittent torque is rated at 335 lb-ft (454 Nm) -- verify against the application pages for your specific configuration. The 1-1/4" round output shaft includes a keyway. Shaft power is 32 HP at 500 RPM and 64 HP at 1,000 RPM, with output power rated at 56+ HP. The 267 Series also supports continuous operation with a 30% de-rating. Call us to confirm proper fit for your application.
The Chelsea 267 Series is available in five speed ratios and multiple output configurations, including SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, and driveline outputs. Common applications include snow plow trucks, small refuse trucks, and yard jockey trucks. The SuperTorque option delivers up to 20% more torque capacity than a standard 267 Series unit. Wet spline lubrication (W designation) and pressure lube (P designation) variants are available to match your pump shaft requirements.
Features
10-bolt mounting pattern fits Allison automatic transmissions
Constant mesh design supports continuous power delivery (30% de-rating applies)
Intermittent torque rated at 335 lb-ft (454 Nm) -- check application pages for your configuration
1-1/4" round output shaft with keyway
Shaft power: 32 HP at 500 RPM, 64 HP at 1,000 RPM
360-degree rotatable flanges for improved clearance
SuperTorque gears available for up to 20% additional torque capacity
Wet spline or greaseable shaft option to extend PTO and pump shaft service life
Tech Specs
- INTERMITTENT TORQUE: 335 lb-ft / 454 Nm (check application pages for actual torque ratings for your configuration)
- MOUNTING TYPE: 10-Bolt
- SHIFT TYPE: Constant Mesh
- TRANSMISSION MANUFACTURER: Allison
- OUTPUT SHAFT TYPE: 1-1/4" Round with keyway
- OUTPUT POWER: 56+ HP / 41-50 kW
- SHAFT POWER: 32 HP (500 RPM), 64 HP (1,000 RPM) / 24 kW (500 RPM), 48 kW (1,000 RPM)
- CONTINUOUS OPERATION: Yes, with 30% de-rating
Additional Information
The Chelsea 267 Series is available in five speed ratios and multiple output configurations, including SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, and driveline outputs. Common applications include snow plow trucks, small refuse trucks, and yard jockey trucks. The SuperTorque option delivers up to 20% more torque capacity than a standard 267 Series unit. Wet spline lubrication (W designation) and pressure lube (P designation) variants are available to match your pump shaft requirements.
Parts Manual: Chelsea 267 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
