The Chelsea 281GPFJP-H8XV is a 281 Series Power Take-Off unit built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. It uses hydraulic (PowerShift) engagement, making it a hot-shift PTO suited to continuous-duty operation. The 281 Series carries a continuous torque rating of 390 lb-ft and delivers up to 74 HP at 1,000 RPM. The unit features a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring seal between the housing and bearing cap for improved clamp load, and an 80%-thicker clutch pack steel disc stack to resist premature wear. Nine speed ratios are available across the series, and a wet spline lubrication option extends shaft service life.
Features
Hydraulic PowerShift engagement for hot-shift, continuous-duty operation
Mounts to 10-bolt transmission aperture, compatible with Allison and Caterpillar transmissions
390 lb-ft continuous torque rating; 74 HP output at 1,000 RPM
Ductile iron bearing cap, 117% stronger than the gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and reduces vibration effects
Clutch pack steel discs increased 80% in thickness to resist premature tooth wear
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Continuous Operation: Yes
- Continuous Torque: 390 lb-ft (529 Nm)
- Output Power: 74 HP at 1,000 RPM; 37 HP at 500 RPM
- Transmission Compatibility: Allison, Caterpillar (10-bolt aperture)
- Bearing Cap Material: Ductile Iron
- Lubrication Option: Wet Spline available
- Speed Ratios: Nine ratios available across series
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
