The Chelsea 281 Series Power Take-Off, part number 281GPFJP-B3RS or 281GPFJPB3RS, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. It carries a single, continuous duty torque rating and offers nine speed ratios covering both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the o-ring sealing configuration between the housing and bearing cap improves clamp load while reducing the damaging effects of engine vibration. An enhanced clutch pack features 80% thicker steel disks to resist premature tooth wear. Rotatable cast iron flanges reduce pump clearance conflicts, and the Wet Spline Lubrication option provides 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) protects driven equipment, and SmartStart reduces shock load at start-up for applicable setups. Common markets include fire and rescue, refuse, truck cranes, and pumper cleaner applications. Call us to confirm proper fit for your transmission and application.
Parker Chelsea reference documents for the 281 Series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Part number 281GPFJP-B3RS is also referenced as SP281GPFJP-B3RS in some catalog listings.
Features
10-bolt mounting for Allison automatic transmissions, hydraulic PowerShift (hot-shift) operation
Ductile iron bearing cap, 117% stronger than gray iron
O-ring seal between housing and bearing cap improves clamp load and resists engine vibration
Enhanced clutch pack with 80% thicker steel disks to reduce premature tooth wear
Nine speed ratios including low and high speeds; single continuous duty torque rating
Wet Spline Lubrication option for 7 to 10 times greater shaft life; SmartStart and Electronic Overspeed Control (EOC) included
Tech Specs
- Mounting: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot Shift)
- Compatible Transmissions: Allison automatic (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Speed Ratios: Nine, including low and high
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube (P) and Wet Spline (W) options
- Output Shaft Options: SmartStart Round Shaft (1-1/4" - 5/16" Key), 3/4" 11T Pump Spline, SAE B (7/8" - 13T), SAE C (1-1/4" - 14T), 1410 Companion Flange
- Series: Chelsea 281, evolved from 280 Series
- Applications: Fire and Rescue, Refuse, Truck Cranes, Pumper Cleaner
Additional Information
Parker Chelsea reference documents for the 281 Series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Part number 281GPFJP-B3RS is also referenced as SP281GPFJP-B3RS in some catalog listings.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
