The Chelsea 281 Series Power Take-Off, part number 281GCFJW-B5RZ or 281GCFJWB5RZ, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. It mounts via a 10-bolt flange and carries a single continuous-duty torque rating of 390 lb-ft (529 Nm) at the series level. Nine speed ratios span low through high range. The ductile iron bearing cap is 117% stronger than gray iron, and an o-ring sealing configuration between the housing and bearing cap improves clamp load and resists vibration. The clutch pack uses steel disks that are 80% thicker than the predecessor 280 Series design. Rotatable cast-iron flanges reduce interference fit issues, and the Positive Stop feature on driveline outputs eliminates oil seal damage. A Wet Spline lubrication option extends shaft life 7 to 10 times compared to standard dry-spline configurations. SmartStart reduces shock load at engagement, and Electronic Overspeed Control (EOC) protects connected driven equipment. Call us to confirm proper fit for your transmission and application.
Features
Chelsea 281 Series hydraulic (PowerShift) hot-shift PTO for 10-bolt automatic transmission apertures, including Allison and Caterpillar
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and reduces vibration damage
Enhanced clutch pack with steel disks 80% thicker than 280 Series design
Nine speed ratios covering low and high speed ranges
Wet Spline lubrication option delivers 7 to 10 times greater shaft life; SmartStart reduces engagement shock load; EOC protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Torque: 390 lb-ft / 529 Nm (series rating; confirm for specific application)
- Continuous Operation: Yes
- Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine (includes low and high)
- Lubrication: Wet Spline option available
- Series: Chelsea 281 Series (evolution of 280 Series)
Additional Information
Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices
