The Chelsea 281 Series Power Take-Off, part number 281GTFJW-B8RK or 281GTFJWB8RK, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. It mounts on a 10-bolt aperture and carries a continuous torque rating of 390 lb-ft (529 Nm). The 281 Series is an evolution of the Chelsea 280 Series, adding 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 tooth wear. Nine speed ratios cover both low and high speed applications, and an optional wet spline lubrication provides 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) and SmartStart are also available within the series. Call us to confirm proper fit for your transmission and application.
The 281 Series is suited for demanding applications including fire and rescue, truck cranes, pumper/cleaner, and refuse trucks. Parker Chelsea publishes supporting documentation including the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Call Pro Gear and Transmission to confirm this part fits your specific transmission and driven equipment.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap improves clamp load and reduces vibrational effects
80% thicker steel discs in the clutch pack to resist premature tooth wear
Nine speed ratios covering low and high speeds
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot Shift)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine, including low and high speeds
- Lubrication: Wet Spline option available
- Continuous Operation: Yes
Additional Information
The 281 Series is suited for demanding applications including fire and rescue, truck cranes, pumper/cleaner, and refuse trucks. Parker Chelsea publishes supporting documentation including the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Call Pro Gear and Transmission to confirm this part fits your specific transmission and driven equipment.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
