Features
Hydraulic PowerShift (hot-shift) operation for Allison automatic transmissions, 10-bolt aperture mount
Ductile iron bearing cap, 117% stronger than gray iron versus the predecessor 280 Series
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Nine speed ratios including low and high speeds; continuous torque rating of 390 lb-ft (529 Nm)
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
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Compatible Transmission: Allison automatic transmissions
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- 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)
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Output Shaft Options: 1-1/4" round SmartStart shaft, 3/4"-11T pump spline, SAE B 7/8"-13T pump spline, SAE C 1-1/4"-14T pump spline, 1410 companion flange
- Lubrication: Pressure lube or wet spline option
- Continuous Operation: Yes
Additional Information
The Chelsea 281 Series is suited for fire and rescue, refuse, truck crane, and pumper/cleaner vocations. Available supporting documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual from Parker Chelsea.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
