The Chelsea 281GGFJP-G3SV is a 281 Series PowerShift (hydraulic) hot-shift power take-off built for automatic transmissions with a 10-bolt aperture, including Allison applications. As part of the 281 Series, it carries a continuous torque rating of 390 lb-ft and supports continuous-duty operation. The 281 Series improves on the earlier 280 Series with 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 an 80% increase in clutch pack steel disc thickness to resist premature tooth wear. Nine speed ratios cover both low- and high-speed requirements. Common markets include fire and rescue, refuse, truck cranes, and pumper/cleaner applications. Part number 281GGFJP-G3SV is sold by Pro Gear and Transmission.
Features
Hydraulic PowerShift (hot-shift) operation for engagement under load
10-bolt mounting aperture for Allison and Caterpillar automatic transmissions
390 lb-ft continuous torque rating; supports continuous-duty operation
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 to resist premature tooth wear
Nine available speed ratios including low- and high-speed options
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Torque: 390 lb-ft (529 Nm)
- Continuous Operation: Yes
- Transmission Compatibility: Allison (10-bolt aperture)
- Output Types Available (Series): SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options (Series): 1-1/4" Round (5/16" Key), 3/4"-11T Pump Spline, SAE B 7/8"-13T, SAE C 1-1/4"-14T, DIN 5462, 1410 Companion Flange
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Speed Ratios: Nine (low- and high-speed)
- Lubrication: Pressure Lube and Wet Spline options available
Additional Information
The 281 Series is an evolution of Chelsea's top-selling 280 Series PTO, redesigned to address vibrational stresses from modern engine designs. Applicable markets include fire and rescue, refuse collection, truck cranes, and pumper/cleaner vehicles. The series supports an Electronic Overspeed Control (EOC) feature to protect driven equipment, a SmartStart option to reduce shock load at engagement, and a wet spline lubrication option reported to provide 7 to 10 times greater shaft life. Rotatable cast iron flanges allow adjustment for improved pump clearance. Relevant Parker Chelsea documentation includes 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.
