The Chelsea 281 Series Power Take-Off, part number 281GTFJW-B5RK or 281GTFJWB5RK, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. An evolution of the 280 Series, the 281 features 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 80% thicker steel discs in the clutch pack to resist premature tooth wear. Nine speed ratios span low and high ranges. Rotatable cast-iron flanges reduce interference issues at the pump mount. Pro Gear and Transmission sells this genuine Chelsea part. Call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot-shift) operation, 10-bolt aperture mount for Allison automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds
Wet Spline lubrication option provides 7 to 10 times greater shaft life; SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: Hydraulic PowerShift (hot-shift)
- Compatible Transmissions: Allison automatic transmissions
- Continuous Torque Rating: 390 lb-ft (529 Nm) - see application pages for actual ratings
- Speed Ratios: Nine ratios, including low and high speeds
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Lubrication: Pressure lube or wet spline options
- Continuous Operation: Yes
- Related Documents: 281/288 Series Parts List HY25-2281-M1/US; 267/281/288/871/878 Series Owner's Manual
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
