The Chelsea 281GPFJP-D5AC or 281GPFJPD5AC is a hydraulically shifted, hot-shift Power Take-Off from the Chelsea 281 Series, designed for automatic transmissions with a 10-bolt aperture including Allison and Caterpillar units. It carries a single, continuous duty torque rating and offers nine speed ratios covering both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the o-ring sealing configuration between the housing and bearing cap improves clamp load while reducing the damaging vibrational effects of modern engine designs. The clutch pack features steel disks that are 80% thicker than the predecessor 280 Series, resisting premature tooth wear. Rotatable cast-iron flanges reduce pump clearance interference, and a positive stop for driveline outputs eliminates oil seal damage from coupling. Call us to confirm proper fit for your transmission and application.
The Chelsea 281 Series is an evolution of the top-selling 280 Series, with targeted engineering upgrades to handle the increased vibrational demands of current and future engine designs. Common markets include fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. Applicable Parker Chelsea documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The alternate part number reference is SP281GPFJP-D5AC.
Features
Hydraulic PowerShift (hot-shift) operation for Allison and Caterpillar 10-bolt aperture transmissions
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap to reduce vibrational effects and improve clamp load
80% thicker steel disks in the clutch pack compared to the predecessor 280 Series
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
- Shift Type: Hydraulic PowerShift (hot-shift)
- Mounting Type: 10-bolt
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Continuous Torque: 390 lb-ft (529 Nm) - check application pages for actual torque rating
- Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1,000 RPM
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine (includes low and high)
- Lubricant Options: Pressure Lube (P) or Wet Spline (W)
Additional Information
The Chelsea 281 Series is an evolution of the top-selling 280 Series, with targeted engineering upgrades to handle the increased vibrational demands of current and future engine designs. Common markets include fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. Applicable Parker Chelsea documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The alternate part number reference is SP281GPFJP-D5AC.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
