The Chelsea 281 Series Power Take-Off, part number 281GKFJP-B5BD or 281GKFJPB5BD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. This assembly carries a 33/39 gear ratio and is built on Chelsea's evolution of the proven 280 Series platform. Key structural upgrades include a ductile iron bearing cap rated 117% stronger than gray iron and an o-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibrational effects from modern engine designs. The clutch pack features 80% thicker steel discs to resist premature tooth wear. Cross-references to 280GKFJP-B5BD or 280GKFJPB5BD. Call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot-shift) operation for automatic transmissions with 10-bolt aperture
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high-speed ranges
Wet Spline Lubrication option for 7 to 10 times greater shaft life; SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Shift Type: Hydraulic PowerShift (hot-shift)
- Mounting: 10-bolt aperture
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Gear Ratio: 33/39
- Continuous Torque (Series Rating): 390 lb-ft (529 Nm) - verify actual rating on application page
- Output Power (Series): 56+ HP (51+ kW)
- Lubrication Options: Pressure Lube or Wet Spline
- Speed Ratios: Nine, including low and high
- Cross Reference: 280GKFJP-B5BD or 280GKFJPB5BD
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
