281GCFJP-B3RY Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off Assembly, part number 281GCFJP-B3RY or 281GCFJPB3RY, is a hydraulically shifted (PowerShift) hot-shift PTO designed for 10-bolt aperture automatic transmissions, most commonly Allison units. The 281 Series is Chelsea's evolution of the 280 Series, featuring 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-speed needs. Applications include fire and rescue, refuse, pumper-cleaner, and truck crane trucks. Call us to confirm proper fit for your application.

Features

Hydraulic (PowerShift) hot-shift operation for Allison 10-bolt aperture automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Wet spline lubrication option provides 7 to 10 times greater shaft life
Rotatable cast iron flanges reduce pump-clearance interference; positive stop for driveline outputs eliminates oil seal damage from coupling

Tech Specs

• Mounting Type: 10-Bolt aperture
• Shift Type: PowerShift (Hydraulic hot-shift)
• Continuous Operation: Yes
• Series Continuous Torque Rating: 390 lb-ft (529 Nm) -- verify actual rating on Chelsea application pages for this configuration
• Output Power (series): 56+ HP (51+ kW)
• Speed Ratios: Nine (includes low and high speeds)
• Compatible Transmission Manufacturers: Allison (and Caterpillar 10-bolt aperture)
• Lubricant Options: Pressure Lube or Wet Spline
• Output Types available in series: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline

Additional Information

Typical markets for the Chelsea 281 Series include fire and rescue apparatus, refuse trucks, pumper-cleaner units, and truck cranes. The 281 Series succeeds the 280 Series PTO with structural and sealing upgrades focused on durability under the vibrational demands of modern engine designs. Parker Chelsea reference documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.

Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices