Description
The Chelsea 281 Series Power Take-Off, part number 281GTFJP-B3RF or 281GTFJPB3RF, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. It is an evolution of the 280 Series platform, incorporating a ductile iron bearing cap rated 117% stronger than gray iron, an 80% thicker clutch pack steel disc stack to resist premature tooth wear, and an O-ring sealing configuration between the housing and bearing cap for improved clamp load and vibration resistance. Nine speed ratios cover both low and high ranges. Rotatable cast-iron flanges reduce interference fit issues, and a wet spline lubrication option provides 7 to 10 times greater shaft life compared to dry configurations. Electronic Overspeed Control (EOC) protects driven equipment, and SmartStart reduces shock load at start-up where applicable. Hose is included. Cross-reference: 280GTFJP-B3RF or 280GTFJPB3RF. Call us to confirm proper fit for your transmission and application.
Features
Hydraulic PowerShift (hot-shift) operation for Allison 10-bolt automatic transmissions
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 reduces vibrational effects and improves clamp load
Nine speed ratios including low and high ranges
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces start-up shock load
Rotatable cast-iron flanges reduce pump clearance interference; positive stop for driveline outputs prevents oil seal damage
Hose included
Tech Specs
- Mounting: 10-Bolt aperture (Allison automatic transmissions)
- Shift Type: PowerShift (Hydraulic hot-shift)
- Continuous Torque Rating: 390 lb-ft (529 Nm) – verify actual rating on application page
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Speed Ratios: Nine (including low and high)
- Lubricant Options: Pressure Lube (P), Wet Spline (W)
- Cross Reference: 280GTFJP-B3RF or 280GTFJPB3RF
Additional Information
Applicable Parker Chelsea documents: 281/288 Series Parts List (HY25-2281-M1/US); 267/281/288/871/878 Series Owner’s Manual; 281 Series Sales Literature; Chelsea PTO Stud Kits (HY25-2002-M1_US). Common markets include fire and rescue, truck cranes, pumper cleaners, and refuse vehicles.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
