The Chelsea 281 Series Power Take-Off Assembly, part number 281GCFJP-B5BD or 281GCFJPB5BD, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. The 281 Series is an evolution of the 280 Series, incorporating 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 an 80% thicker steel clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high-speed applications. Rotatable cast-iron flanges reduce interference clearance issues, and a Positive Stop feature on driveline outputs protects oil seals from coupling damage. The Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at start-up, and Electronic Overspeed Control (EOC) safeguards driven equipment. Cross-references include 280GCFJP-B5BD and 280GCFJPB5BD. Call us to confirm proper fit for your transmission and application.
Features
Ductile iron bearing cap rated 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
80% thicker steel discs in the clutch pack resist premature tooth wear
Nine speed ratios available, including low and high-speed ranges
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) and SmartStart protect driven equipment and reduce start-up shock load
Positive Stop on driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) Hot Shift
- Compatible Transmission: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque (Series): 390 lb-ft (529 Nm) - verify actual rating on application pages
- Speed Ratios: Nine, including low and high speeds
- Lubrication: Pressure Lube or Wet Spline options
- Cross-Reference Part Numbers: 280GCFJP-B5BD, 280GCFJPB5BD, 280GCFJP-B5BDDAN, 280GCFJPB5BDDAN
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
