The Chelsea 281GGFJP-G5XV is a 281 Series Power Take-Off built for automatic transmissions with a 10-bolt aperture, including Allison applications. It uses hydraulic PowerShift engagement, making it a hot shift unit suited for continuous-duty operation. The 281 Series is an evolution of the 280 Series, featuring a ductile iron bearing cap rated 117% stronger than the gray iron predecessor, an o-ring sealing configuration between the housing and bearing cap, and an 80% increase in clutch pack steel disc thickness. The series carries a continuous torque rating of 390 lb-ft and supports output configurations including SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline outputs. A genuine Chelsea part sold by Pro Gear and Transmission.
Features
281 Series hydraulic PowerShift (hot shift) engagement
10-bolt mounting aperture for Allison automatic transmissions
Continuous-duty rated at 390 lb-ft (529 Nm) torque
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap for improved clamp load
80% thicker steel discs in clutch pack to resist premature wear
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot Shift)
- Continuous Operation: Yes
- Continuous Torque: 390 lb-ft (529 Nm)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Output Options: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Lubrication: Pressure Lube / Wet Spline options available
Additional Information
The 281 Series is an evolution of the Chelsea 280 Series PTO and addresses vibrational stress caused by modern engine designs. Key structural upgrades include a ductile iron bearing cap, an improved o-ring sealing configuration, and a reinforced clutch pack. Available markets include fire and rescue, refuse, pumper cleaner, and truck crane applications. The series supports nine speed ratios and includes an optional SmartStart feature to reduce shock load at engagement, as well as Electronic Overspeed Control (EOC) to protect driven equipment. Rotatable cast iron flanges allow for improved pump clearance positioning. A wet spline lubrication option is available and provides 7 to 10 times greater shaft life compared to standard configurations.Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
