The Chelsea 281 Series PTO Assembly (part number 281GGKVP-B8RK or 281GGKVPB8RK) is a hydraulically shifted, hot-shift power take-off designed for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. Built as an evolution of the 280 Series, the 281 Series incorporates a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load and resist vibrational stress, and an enhanced clutch pack with steel discs 80% thicker than the previous design. Nine speed ratios cover both low and high-speed output needs. Rotatable cast-iron flanges reduce interference fit issues, and the Wet Spline Lubrication option extends shaft life by 7 to 10 times. The optional SmartStart feature reduces shock load at engagement, while Electronic Overspeed Control (EOC) safeguards driven equipment. Call us to confirm proper fit for your application.
The Chelsea 281 Series is suited for demanding markets including Fire and Rescue, Truck Cranes, Pumper Cleaner, and Refuse applications. Related Parker Chelsea service documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The 281 Series hose is included with this assembly, so no separate hose order is required.
Features
Hydraulic PowerShift (hot-shift) operation for use with Allison automatic transmissions
10-bolt mounting aperture
Ductile iron bearing cap, 117% stronger than gray iron, with O-ring seal between housing and bearing cap
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series design
Nine speed ratios including low and high speeds; Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Positive Stop for driveline outputs eliminates oil seal damage from coupling; SmartStart and Electronic Overspeed Control (EOC) available
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot-Shift)
- Continuous Operation: Yes
- Transmission Application: Allison automatic transmissions
- Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Speed Ratios: Nine (including low and high speeds)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube or Wet Spline option
- Part Number: 281GGKVP-B8RK or 281GGKVPB8RK
Additional Information
The Chelsea 281 Series is suited for demanding markets including Fire and Rescue, Truck Cranes, Pumper Cleaner, and Refuse applications. Related Parker Chelsea service documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The 281 Series hose is included with this assembly, so no separate hose order is required.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
