Description
The Chelsea 281 Series Power Take-Off assembly, part number 281GCFJW-B8RY or 281GCFJWB8RY, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison transmissions. As an evolution of the 280 Series, the 281 Series carries a series continuous torque rating of 390 lb-ft (529 Nm) and delivers output power of 56+ HP. Nine speed ratios cover both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, the clutch pack uses steel discs 80% thicker than the prior generation, and an o-ring sealing configuration improves clamp load and reduces the effects of engine vibration. Output options include SAE B and SAE C pump flanges, ISO 7652 flanges, and driveline configurations. Call us to confirm proper fit for your specific transmission and application.
Features
Hydraulic PowerShift (hot-shift) operation for automatic transmissions with 10-bolt aperture
Ductile iron bearing cap, 117% stronger than gray iron
Clutch pack steel discs 80% thicker than the predecessor 280 Series for reduced tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration
Nine speed ratios including low and high speeds; series 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 Manufacturer: Allison
- Series 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: 3/4 in. 11-tooth pump spline, SAE B 7/8 in. 13-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, 1410 Companion Flange, SmartStart 1-1/4 in. round shaft with 5/16 in. key
- Lubricant Options: Pressure Lube, Wet Spline
- Continuous Operation: Yes
- Related Series Documents: 281/288 Series Parts List HY25-2281-M1/US; 267/281/288/871/878 Series Owner’s Manual
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
