The Chelsea 281 Series Power Take-Off, part number 281GMFJP-D5RK or 281GMFJPD5RK, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. The 281 Series is an evolution of the 280 Series, with 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 steel clutch-pack discs increased 80% in thickness to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Rotatable cast-iron flanges reduce pump clearance issues, and a positive stop for driveline outputs eliminates oil seal damage from coupling. Call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures including Allison
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Enhanced clutch pack with steel discs 80% thicker to resist premature tooth wear
Nine speed ratios including low and high speeds
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart option reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Power (Series): 56+ HP / 51+ kW
- Speed Ratios: Nine (low and high speeds included)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Lubrication Options: Pressure Lube or Wet Spline (Wet Spline provides 7 to 10 times greater shaft life)
- Part Number: 281GMFJP-D5RK or 281GMFJPD5RK
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
