The Chelsea 281 Series Power Take-Off, part number 281GPFJP-B3XD or 281GPFJPB3XD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It mounts with a 10-bolt pattern and delivers nine speed ratios covering low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the clutch pack features steel discs 80% thicker than the previous 280 Series design. An o-ring sealing configuration between the housing and bearing cap improves clamp load and resists vibration. Rotatable cast-iron flanges reduce interference fit issues, and the optional wet spline lubrication provides 7 to 10 times greater shaft life. SmartStart reduces shock load at engagement, and the Electronic Overspeed Control (EOC) protects driven equipment. This unit also cross-references to 280GPFJP-B3XD and 280GPFJPB3XD. Call us to confirm proper fit for your application.
The Chelsea 281 Series is an evolution of the 280 Series platform, targeted at demanding vocational applications including fire and rescue apparatus, refuse trucks, pumper-cleaner units, and truck cranes. The hose is included with the assembly, eliminating a separate line item. Parker documents covering this unit include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Contact Pro Gear and Transmission to verify fitment for your specific transmission and output configuration.
Features
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap for improved clamp load and vibration resistance
Enhanced clutch pack with steel discs 80% thicker than 280 Series predecessor
Nine speed ratios including low and high ranges
Rotatable cast-iron flanges reduce pump clearance interference
Electronic Overspeed Control (EOC) and SmartStart shock-load reduction included
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Speed Ratios: Nine (includes low and high speeds)
- Lubrication Option: Wet Spline (7 to 10 times greater shaft life)
- Cross Reference: 280GPFJP-B3XD or 280GPFJPB3XD; 3252PME631SE
Additional Information
The Chelsea 281 Series is an evolution of the 280 Series platform, targeted at demanding vocational applications including fire and rescue apparatus, refuse trucks, pumper-cleaner units, and truck cranes. The hose is included with the assembly, eliminating a separate line item. Parker documents covering this unit include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Contact Pro Gear and Transmission to verify fitment for your specific transmission and output configuration.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
