The Chelsea 281 Series Power Take-Off, part number 281GDKVP-B5XV or 281GDKVPB5XV, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly paired with Allison transmissions. Built as an evolution of the 280 Series, this unit features 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 enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Rotatable cast-iron flanges reduce interference, while the optional wet spline lubrication delivers 7 to 10 times greater shaft life. SmartStart limits shock load at engagement, and the Electronic Overspeed Control (EOC) safeguards connected driven equipment. A genuine Chelsea part sold by Pro Gear and Transmission. Call us to confirm proper fit for your transmission and application.
The Chelsea 281 Series is designed for demanding vocational applications including fire and rescue, refuse, pumper cleaner, and truck crane service. The positive stop feature on driveline outputs eliminates oil seal damage from coupling. Applicable Parker Chelsea reference documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibration effects
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds
Wet spline lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) Hot Shift
- Compatible Transmission: Allison (10-bolt aperture)
- Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application page
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine, including low and high speeds
- Lubrication: Pressure Lube (P) or Wet Spline (W) option
- SmartStart: Available for shock load reduction at start-up
- Electronic Overspeed Control (EOC): Included
Additional Information
The Chelsea 281 Series is designed for demanding vocational applications including fire and rescue, refuse, pumper cleaner, and truck crane service. The positive stop feature on driveline outputs eliminates oil seal damage from coupling. Applicable Parker Chelsea reference documents include 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.
