The Chelsea 281GDFJP-D5SD is a 281 Series Power Take-Off built for automatic transmissions with a 10-bolt aperture, including Allison applications. This hydraulically shifted, hot shift PTO supports continuous operation with a series continuous torque rating of 390 lb-ft. 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, and an 80% thicker steel clutch pack to resist premature wear and reduce vibrational stress from modern engine designs. Nine speed ratios are available across the series, covering low- and high-speed applications. The 281 Series is suited for refuse, fire and rescue, truck crane, and pumper cleaner service. A genuine Chelsea part, sold by Pro Gear and Transmission.
Features
10-bolt mounting for Allison automatic transmissions
PowerShift hydraulic hot shift engagement supports continuous operation
281 Series continuous torque rating: 390 lb-ft (529 Nm)
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and reduces vibration
80% thicker steel discs in the clutch pack resist premature wear
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot Shift)
- Continuous Operation: Yes
- Series Continuous Torque: 390 lb-ft (529 Nm)
- Series Output Power: 56+ HP (51+ kW)
- Series Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM
- Transmission Compatibility: Allison automatic (10-bolt aperture)
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube / Wet Spline option
- Speed Ratios: Nine ratios including low and high speeds
Additional Information
The 281 Series is an evolution of the Chelsea 280 Series PTO. Series improvements include a ductile iron bearing cap, an o-ring sealing configuration, and an 80% increase in steel disc thickness within the clutch pack. These changes address vibrational effects from modern engine designs. The series supports SmartStart technology to reduce shock load at start-up and includes Electronic Overspeed Control (EOC) to protect driven equipment. Typical markets include fire and rescue, refuse, truck cranes, and pumper cleaner applications. Reference documents: 281/288 Series Parts List HY25-2281-M1/US; 267/281/288/871/878 Series Owner's Manual; Chelsea PTO Stud Kits HY25-2002-M1_US.Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
