The Chelsea 281GKFJP-L5RK is a 281 Series PowerShift Power Take-Off built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. This series uses hydraulic shifting for hot-shift operation, supporting continuous duty cycles. The 281 Series features a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap for improved clamp load, and clutch pack steel discs that are 80% thicker than the predecessor 280 Series design. Output options across the 281 Series include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. Nine speed ratios are available within the series. A genuine Chelsea part from Pro Gear and Transmission.
Features
281 Series PowerShift (hydraulic hot-shift) PTO
10-bolt mounting for Allison and Caterpillar automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap for improved clamp load
Clutch pack steel discs increased 80% in thickness over the 280 Series
Continuous duty rated; nine speed ratios available across the series
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Continuous Operation: Yes
- Series Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine ratios including low and high speeds
Additional Information
The 281 Series is an evolution of the Chelsea 280 Series PTO, engineered to address vibrational effects from modern engine designs. Markets served include fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. The series supports an optional wet spline lubrication configuration for extended shaft life. Electronic Overspeed Control (EOC) is available within the series to protect driven equipment. SmartStart capability is offered on select configurations to reduce shock load at engagement. 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.Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
