Features
Hydraulic hot-shift (PowerShift) operation for Allison and Caterpillar 10-bolt automatic transmissions
Ductile iron bearing cap - 117% stronger than gray iron predecessor
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; series continuous torque up to 390 lb-ft
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; hose included
Rotatable cast-iron flanges reduce interference clearance issues; Positive Stop for driveline outputs eliminates oil seal damage
Tech Specs
- Mounting Type: 10-Bolt aperture (Allison / Caterpillar automatic transmissions)
- Shift Type: PowerShift - Hydraulic hot-shift
- Series Continuous Torque: 390 lb-ft (529 Nm) - check application pages for actual torque ratings
- Series 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 (28 kW at 500 RPM / 55 kW at 1000 RPM)
- Output Types: 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 option
- Continuous Operation: Yes
- Also referenced as: 5P1491, 5P1480
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
