Features
Ductile iron bearing cap: 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap for improved clamp load and vibration resistance
Enhanced clutch pack with 80% thicker steel discs to reduce 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 from overspeed damage
SmartStart feature reduces shock load at start-up for compatible applications
Rotatable cast-iron flanges reduce pump clearance interference issues
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Compatible Transmissions: Allison and Caterpillar automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - check application pages for actual rating
- Output Types Available in Series: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine ratios including low and high speeds
- Lubricant System: Pressure Lube or Wet Spline options
- Cross Reference: 280GMFJP-B8RK or 280GMFJPB8RK
- Also Referenced As: 5P1491, 5P1482
Additional Information
The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. The series documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The hose is included with this assembly, eliminating the need for a separate order.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
