Description
The Chelsea 281GCFJW-B8RZ or 281GCFJWB8RZ is a 281 Series hydraulically shifted, hot-shift power take-off built for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It mounts via a 10-bolt flange and carries a single, continuous-duty torque rating for the series. The 281 Series is an evolution of the 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap, and an 80% thicker clutch-pack steel disc stack to resist premature tooth wear. Nine speed ratios cover both low and high-speed demands. Common markets include fire and rescue, refuse, pumper/cleaner, and truck crane applications. Call us to confirm proper fit for your specific transmission and application.
Features
10-bolt mounting aperture, compatible with Allison automatic transmissions
Hydraulic PowerShift (hot-shift) operation for engagement under load
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibration effects
80% thicker steel discs in clutch pack 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 feature reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot-Shift)
- Compatible Transmission: Allison automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) – verify actual rating on application pages
- Series Intermittent Torque Range: 301-400 lb-ft
- Series Output Power: 56+ HP (51+ kW)
- Series Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM
- Speed Ratios: Nine (includes low and high speeds)
- Output Options: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Wet Spline option available
- Hose: Included
- Applicable Markets: Fire and Rescue, Refuse, Pumper/Cleaner, Truck Cranes
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
