Description
The Chelsea 281 Series Power Take-Off, part number 281GDFJP-B5SV or 281GDFJPB5SV, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. An evolution of the 280 Series, it features 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 enhanced clutch pack with 80% thicker steel disks to resist premature tooth wear. Nine speed ratios cover both low- and high-speed applications. Cross-references include 280GDFJP-B5SV and 280GDFJPB5SV. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
10-bolt mounting aperture for Allison automatic transmissions
Hydraulic PowerShift (hot-shift) operation for on-the-go engagement
Ductile iron bearing cap, 117% stronger than gray iron
O-ring sealing between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced clutch pack with 80% thicker steel disks to reduce 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 start-up; Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast-iron flanges reduce interference clearance issues; Positive Stop for driveline outputs eliminates oil seal damage
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot Shift)
- Compatible Transmissions: Allison automatic transmissions
- Continuous Torque (series rating): 390 lb-ft (529 Nm)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine, including low and high
- Lubrication: Pressure Lube or Wet Spline options
- Cross References: 280GDFJP-B5SV or 280GDFJPB5SV, 1450-280GDFJPB5SV or 1450280GDFJPB5SV
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
