Description
The Chelsea 281 Series Power Take-Off Assembly, part number 281GPFJP-B5XV or 281GPFJPB5XV, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. This series is an evolution of the Chelsea 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron and an 80% thicker clutch pack steel disc to resist premature tooth wear. Nine speed ratios cover both low and high operating ranges, and the o-ring sealing configuration between the housing and bearing cap reduces vibrational effects while improving clamp load. A Wet Spline Lubrication option extends shaft life by 7 to 10 times compared to standard configurations. Cross-references include 280GPFJP-B5XV and 280GPFJPB5XV. Sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures including Allison and Caterpillar
Ductile iron bearing cap rated 117% stronger than gray iron compared to the predecessor 280 Series
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios including low and high speeds
Wet Spline Lubrication option delivers 7 to 10 times greater shaft life
SmartStart feature reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast-iron flanges reduce interference/clearance issues at pump mounting
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting: 10-Bolt aperture
- Shift Type: Hydraulic PowerShift (hot-shift)
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) – see application pages for actual rating
- Series Intermittent Torque Range: 301 to 400 lb-ft
- Series Output Power: 56+ HP (51+ kW)
- Series Shaft Power: 37 HP at 500 RPM; 74 HP at 1,000 RPM
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Continuous Operation: Yes
- Lubrication: Pressure Lube and Wet Spline options
- Cross-Reference Part Numbers: 280GPFJP-B5XV, 280GPFJPB5XV, 3252PME633IC
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
