The Chelsea 281GSFJP-B5SD or 281GSFJPB5SD is a hydraulically shifted, hot-shift Power Take-Off from the Chelsea 281 Series, designed for 10-bolt aperture automatic transmissions commonly found on Allison applications. This PTO evolved from the proven 280 Series with several measurable improvements: a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap to improve clamp load, and an 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high speed needs. Rotatable cast-iron flanges reduce interference at pump mounting, and a positive stop for driveline outputs eliminates oil seal damage. Electronic Overspeed Control (EOC) protects driven equipment. Call us to confirm proper fit for your application.
The Chelsea 281 Series is engineered for demanding vocational markets including fire and rescue, refuse, pumper cleaner, and truck crane applications. The series carries Parker documents including the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The 281GSFJP-B5SD is a genuine Chelsea part sold by Pro Gear and Transmission.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap for improved clamp load
80% thicker steel discs in the clutch pack 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
Electronic Overspeed Control (EOC) protects driven equipment from overspeed damage
SmartStart feature reduces shock load at start-up for applicable configurations
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot Shift)
- Compatible Transmissions: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM
- Continuous Operation: Yes
- Lubrication: Wet Spline option available
- Speed Ratios: Nine, including low and high speeds
Additional Information
The Chelsea 281 Series is engineered for demanding vocational markets including fire and rescue, refuse, pumper cleaner, and truck crane applications. The series carries Parker documents including the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The 281GSFJP-B5SD is a genuine Chelsea part sold by Pro Gear and Transmission.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
