The Chelsea 281 Series Power Take-Off, part number 281GGFJP-D8AC or 281GGFJPD8AC, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. It mounts to fire and rescue, refuse, pumper cleaner, and truck crane platforms. The 281 Series offers nine speed ratios spanning low and high ranges, with output options including SAE B and SAE C pump flanges, ISO 7652 flange, and driveline configurations. A ductile iron bearing cap delivers 117% greater strength 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 80% thicker than the predecessor 280 Series. Electronic Overspeed Control (EOC) and optional Wet Spline Lubrication round out the protection features. Call us to confirm proper fit for your transmission and application.
Features
Ductile Iron Bearing Cap: 117% stronger than gray iron predecessor
Hydraulic PowerShift (hot-shift) operation for Allison 10-bolt aperture transmissions
Nine speed ratios covering low and high speed ranges
O-ring sealing configuration between housing and bearing cap to improve clamp load and reduce vibrational effects
Enhanced clutch pack with steel disks 80% thicker than the 280 Series
Electronic Overspeed Control (EOC) protects driven equipment; optional Wet Spline Lubrication extends shaft life 7 to 10 times
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - check application data for actual torque rating
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine (includes low and high speeds)
- Lubrication: Pressure Lube or Wet Spline options
- Compatible Transmissions: Allison (and Caterpillar) automatic transmissions with 10-bolt aperture
- Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
