Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures, including Allison and Caterpillar
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced clutch pack with 80% thicker steel disks to resist premature tooth wear
Nine speed ratios available, covering both low and high-speed output requirements
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart option reduces shock load at start-up
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; Positive Stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: PowerShift (Hydraulic hot-shift)
- Continuous Operation: Yes
- Continuous Torque (Series): 390 lb-ft (529 Nm) - verify actual rating on application page
- Intermittent Torque (Series): 301-400 lb-ft (501+ Nm)
- Output Power (Series): 56+ HP (51+ kW)
- Shaft Power (Series): 37 HP at 500 RPM / 74 HP at 1000 RPM
- Transmission Compatibility: Allison, Caterpillar (10-bolt automatic)
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: SmartStart Round Shaft (1-1/4" - 5/16" Key), 3/4" 11T Pump Spline, SAE B 7/8" 13T Pump Spline, SAE C 1-1/4" 14T Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange
- Lubrication: Pressure Lube or Wet Spline options
- Speed Ratios: Nine ratios including low and high speeds
- Applicable Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
