The Chelsea 281 Series Power Take-Off, part number 281GMFJW-D3RY or 281GMFJWD3RY, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison applications. An evolution of the 280 Series, the 281 brings a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap for improved clamp load, and an 80% increase in steel disc thickness within the clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high ranges. The wet spline lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement, and Electronic Overspeed Control (EOC) protects downstream driven equipment. Common markets include fire and rescue, refuse, pumper-cleaner, and truck crane applications. Call us to confirm proper fit for your transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap reduces vibrational effects and improves clamp load
80% thicker steel discs in the clutch pack to resist premature tooth wear
Nine speed ratios including low and high speeds; single continuous duty torque rating
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) and SmartStart for reduced shock load at engagement
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Single continuous duty torque rating
- Nine speed ratios including low and high speeds
- Wet spline lubrication option available
- Output types available: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- SmartStart: Yes
- Electronic Overspeed Control (EOC): Yes
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
