Features
Chelsea 281 Series hydraulic hot-shift (PowerShift) PTO, 10-bolt mounting for Allison automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron for improved durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds; continuous duty torque rating
Wet spline lubrication option provides 7 to 10 times greater shaft life; SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast iron flanges reduce pump clearance interference; positive stop for driveline outputs eliminates oil seal damage from coupling
Cross-references: 280GMFJP-B3XD or 280GMFJPB3XD, 3252PME631SE
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on Chelsea application pages
- Intermittent Torque Range: 301 to 400 lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM
- Continuous Operation: Yes
- Speed Ratios: Nine (including low and high)
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Cross Reference: 280GMFJP-B3XD or 280GMFJPB3XD, 3252PME631SE
Additional Information
The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaner, and refuse applications. Applicable Parker Chelsea documentation includes the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The hose ships included with this assembly, so no separate hose order is needed.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
