Features
Hydraulic hot-shift (PowerShift) operation for use with automatic transmissions, 10-bolt aperture mount
Ductile iron bearing cap - 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds
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 for compatible applications
Rotatable cast-iron flanges reduce pump clearance interference
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot Shift)
- Compatible Transmissions: Allison automatic transmissions
- Continuous Operation: Yes
- Continuous Torque (Series): 390 lb-ft (529 Nm) - verify actual rating on application page
- Intermittent Torque (Series): 301 to 400 lb-ft (501+ Nm)
- Output Power (Series): 56+ HP (51+ kW)
- Shaft Power (Series): 37 HP at 500 RPM / 74 HP at 1,000 RPM
- Lubricant Options: Pressure Lube (P), Wet Spline (W)
- Speed Ratios: Nine (including low and high)
- Part Number: 281GPFJP-B8RY or 281GPFJPB8RY
Additional Information
The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaner, and refuse applications. The series is an evolution of the 280 Series PTO, with structural and sealing upgrades designed to handle the vibrational demands of modern engine designs. Hose is included with the assembly - no need to order separately.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
