The Chelsea 281 Series Power Take-Off, part number 281GGFJP-K5XD or 281GGFJPK5XD, is a hydraulically shifted (PowerShift) hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. The 281 Series is an evolution of the 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron and an 80% thicker steel clutch pack to resist premature tooth wear. An o-ring sealing configuration between the housing and bearing cap improves clamp load and resists vibrational effects from modern engine designs. Nine speed ratios cover both low and high-speed applications. Cross-references include 5P1491 and 5P1480. Call us to confirm proper fit for your transmission and application.
The Chelsea 281 Series is suited for demanding vocational applications including fire and rescue, truck cranes, pumper/cleaner units, and refuse vehicles. Rotatable cast-iron flanges reduce interference issues at installation. The Positive Stop feature on driveline outputs eliminates oil seal damage from coupling contact. Electronic Overspeed Control (EOC) provides an added layer of protection for driven equipment. Parker Chelsea publishes a dedicated parts list (HY25-2281-M1/US) and an owner's manual covering the 267, 281, 288, 871, and 878 Series for reference during installation and service.
Features
Ductile Iron Bearing Cap - 117% stronger than gray iron, evolved from the 280 Series design
Enhanced Clutch Pack - steel discs 80% thicker than predecessor to resist premature tooth wear
Improved Seal - o-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine Speed Ratios - covers low and high-speed output requirements
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Compatible Transmission Type: Automatic (10-bolt aperture, Allison)
- Continuous Operation: Yes
- Speed Ratios: Nine (includes low and high speeds)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication Options: Pressure Lube (P), Wet Spline (W)
- Cross-Reference Numbers: 5P1491, 5P1480
- Series: Chelsea 281 Series (evolution of 280 Series)
Additional Information
The Chelsea 281 Series is suited for demanding vocational applications including fire and rescue, truck cranes, pumper/cleaner units, and refuse vehicles. Rotatable cast-iron flanges reduce interference issues at installation. The Positive Stop feature on driveline outputs eliminates oil seal damage from coupling contact. Electronic Overspeed Control (EOC) provides an added layer of protection for driven equipment. Parker Chelsea publishes a dedicated parts list (HY25-2281-M1/US) and an owner's manual covering the 267, 281, 288, 871, and 878 Series for reference during installation and service.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
