Features
Hydraulically shifted hot-shift PTO for 10-bolt Allison and Caterpillar automatic transmissions
Ductile iron bearing cap rated 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap to improve clamp load and reduce vibrational effects
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
Positive stop for driveline outputs eliminates oil seal damage from coupling
SmartStart feature reduces shock load at start-up for select applications
Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Continuous Operation: Yes
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Speed Ratios: Nine ratios including low and high speeds
- Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Lubricant Options: Pressure Lube or Wet Spline
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Hose Included: Yes
Additional Information
The 281 Series is covered under the 281/288 Series Parts List (Parker document HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Typical markets for this series include fire and rescue, refuse collection, truck cranes, and pumper cleaner applications. Hose is included with the assembly. Electronic Overspeed Control (EOC) is available to protect driven equipment from overspeed conditions.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
