Description
The Chelsea 281 Series Power Take-Off, part number 281GSFJP-D5AC or 281GSFJPD5AC, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. An evolution of the 280 Series, the 281 Series adds a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap for improved clamp load, and an 80% thicker steel disc clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high-speed applications. Rotatable cast-iron flanges reduce interference at the pump, and the optional wet spline lubrication delivers 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) protects downstream equipment. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
80% thicker steel discs in the clutch pack to resist premature tooth wear
Nine speed ratios including low and high-speed options
10-bolt aperture mount compatible with Allison and Caterpillar automatic transmissions
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
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm) – verify actual rating on application pages
- Intermittent Torque Range: 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 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″ 11-tooth pump spline, SAE B 7/8″ 13-tooth pump spline, SAE C 1-1/4″ 14-tooth pump spline, 1410 companion flange, DIN 100/120 flange
- Lubrication: Pressure lube or wet spline option
- Continuous Operation: Yes
- Speed Ratios: Nine (including low and high-speed)
- Part Number: 281GSFJP-D5AC or 281GSFJPD5AC
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
