The Chelsea 281 Series Power Take-Off, part number 281GTFJP-B8BD or 281GTFJPB8BD, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications common in fire and rescue, refuse, truck crane, and pumper-cleaner trucks. This series carries a continuous torque rating of 390 lb-ft and offers nine speed ratios spanning low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the clutch pack uses steel discs 80% thicker than the previous 280 Series design. Rotatable cast-iron flanges reduce interference fit issues, and an O-ring sealing configuration between the housing and bearing cap improves clamp load and resists vibration. A Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement, and Electronic Overspeed Control (EOC) protects driven equipment. Call us to confirm proper fit for your application.
The Chelsea 281 Series is an evolution of the 280 Series PTO, developed for markets including fire and rescue, refuse, truck cranes, and pumper-cleaner applications. Output shaft options across the 281 Series include Smart Start round shaft (1-1/4 in. with 5/16 in. key), 3/4 in. 11-tooth pump spline, SAE B 7/8 in. 13-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, DIN 5462 pump spline, 1410 companion flange, DIN 120 flange, and DIN 100 flange. Positive Stop for driveline outputs eliminates oil seal damage caused by coupling contact. Reference documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt Allison and Caterpillar automatic transmissions
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
Enhanced clutch pack with steel discs 80% thicker than the 280 Series for reduced tooth wear
Nine speed ratios including low and high speeds; continuous torque rating of 390 lb-ft (529 Nm)
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; hose included
SmartStart shock-load reduction plus Electronic Overspeed Control (EOC) for equipment protection
Tech Specs
- Mounting Type: 10-Bolt aperture (Allison / Caterpillar automatic transmissions)
- Shift Type: Hydraulic PowerShift (hot-shift)
- Continuous Torque: 390 lb-ft (529 Nm)
- Speed Ratios: Nine, including low and high speeds
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube or Wet Spline options
- Part Number: 281GTFJP-B8BD or 281GTFJPB8BD
Additional Information
The Chelsea 281 Series is an evolution of the 280 Series PTO, developed for markets including fire and rescue, refuse, truck cranes, and pumper-cleaner applications. Output shaft options across the 281 Series include Smart Start round shaft (1-1/4 in. with 5/16 in. key), 3/4 in. 11-tooth pump spline, SAE B 7/8 in. 13-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, DIN 5462 pump spline, 1410 companion flange, DIN 120 flange, and DIN 100 flange. Positive Stop for driveline outputs eliminates oil seal damage caused by coupling contact. Reference documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
