The Chelsea 281 Series Power Take-Off Assembly, part number 281GDFJP-B3XD or 281GDFJPB3XD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. This part is the evolved successor to the 280 Series, carrying a series-rated continuous torque of 390 lb-ft. The ductile iron bearing cap is 117% stronger than gray iron, and an enhanced clutch pack uses steel discs that are 80% thicker to resist premature tooth wear. An o-ring sealing configuration between the housing and bearing cap improves clamp load and reduces vibrational effects from modern engine designs. Nine speed ratios cover both low and high speed applications. Cross-references include 280GDFJP-B3XD and 280GDFJPB3XD. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Markets served by the 281 Series include Fire and Rescue, Truck Cranes, Pumper Cleaner, and Refuse applications. Relevant Parker Chelsea documentation: 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Hose is included with this assembly - no separate order required.
Features
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
Enhanced clutch pack with steel discs 80% thicker 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 for broad application coverage
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison automatic transmissions
- Series Continuous Torque Rating: 390 lb-ft (529 Nm)
- Speed Ratios: Nine ratios including low and high speeds
- Continuous Operation: Yes
- Lubrication Options: Pressure Lube (P), Wet Spline (W)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Series Output Shaft Options: 3/4" 11T Pump Spline, SAE B 7/8" 13T Pump Spline, SAE C 1-1/4" 14T Pump Spline, 1410 Companion Flange, SmartStart Round Shaft (1-1/4" - 5/16" Key)
- Series Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Cross References: 280GDFJP-B3XD, 280GDFJPB3XD, 3252PCE631SE
Additional Information
Markets served by the 281 Series include Fire and Rescue, Truck Cranes, Pumper Cleaner, and Refuse applications. Relevant Parker Chelsea documentation: 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Hose is included with this assembly - no separate order required.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
