Description
Chelsea part number 281GCFJP-G3XD or 281GCFJPG3XD is a 281 Series hydraulically shifted, hot-shift power take-off engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. The 281 Series is an evolution of the top-selling 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 an enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low- and high-speed demands. Rotatable cast-iron flanges reduce interference clearance issues, and the wet spline lubrication option extends shaft life by 7 to 10 times. Available output types include SAE B pump flange, SAE C pump flange, driveline, and more. Call us to confirm proper fit for your transmission and application.
Features
Hydraulic hot-shift (PowerShift) design for 10-bolt automatic transmission mounting, compatible with Allison and Caterpillar transmissions
Ductile iron bearing cap is 117% stronger than gray iron for extended durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series to resist premature tooth wear
Nine speed ratios including low- and high-speed options; continuous duty operation supported
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
Tech Specs
- Mounting Type: 10-Bolt aperture (Allison and Caterpillar automatic transmissions)
- Shift Type: PowerShift (Hydraulic hot-shift)
- Continuous Torque: 390 lb-ft (529 Nm) — see application pages for actual rating
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Output Shaft Options: Smart Start round shaft (1-1/4″ – 5/16″ key), 3/4″ 11-tooth pump spline, SAE B 7/8″ 13-tooth pump spline, SAE C 1-1/4″ 14-tooth pump spline, DIN 5462 pump spline, 1410 companion flange, DIN 120 flange, DIN 100 flange
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Speed Ratios: Nine (including low and high)
- Lubrication: Pressure lube or wet spline option
- Continuous Operation: Yes
- Hose: Included
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
