Description
The Chelsea 281 Series Power Take-Off, part number 281GMFJP-E5XV or 281GMFJPE5XV, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series is an evolution of the 280 Series, adding a ductile iron bearing cap rated 117% stronger than gray iron and an 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high speed demands. Output options span SAE B and SAE C pump flanges, ISO 7652 pump flanges, and driveline configurations. A Wet Spline Lubrication option extends shaft life 7 to 10 times over standard configurations. Sold by Pro Gear and Transmission. Call us to confirm proper fit for your transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) and SmartStart reduce shock load and protect driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Operation: Yes
- Continuous Torque Rating: 390 lb-ft (529 Nm) – verify actual rating on application pages
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: 1-1/4″ Round with 5/16″ Key (SmartStart), 3/4″-11T Pump Spline, SAE B 7/8″-13T Pump Spline, SAE C 1-1/4″-14T Pump Spline, 1410 Companion Flange
- Speed Ratios: Nine, including low and high speeds
- Lubrication: Pressure Lube (P) or Wet Spline (W) option
- Transmission Compatibility: Allison and Caterpillar automatic transmissions with 10-bolt aperture
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
