The Chelsea 281 Series Power Take-Off assembly, part number 281GMFJW-B5RY or 281GMFJWB5RY, is a hydraulically shifted (PowerShift) hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly paired with Allison transmissions. The 281 Series is an evolution of the 280 Series, featuring a ductile iron bearing cap that is 117% stronger than the gray iron used in its predecessor. An o-ring sealing configuration between the housing and bearing cap improves clamp load and reduces vibrational effects. The clutch pack uses steel discs 80% thicker than those in the prior generation, resisting premature wear in continuous-duty cycles. Typical markets include refuse, fire and rescue, truck cranes, and pumper-cleaner equipment. Call us to confirm proper fit for your transmission and application.
Features
Hydraulic PowerShift (hot-shift) operation for Allison 10-bolt automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap for improved clamp load and vibration resistance
Enhanced clutch pack with steel discs 80% thicker than previous generation
Continuous-duty torque rating up to 390 lb-ft (529 Nm) at the series level
Nine available speed ratios including low- and high-speed options within the 281 Series
Tech Specs
- Shift Type: Hydraulic (PowerShift hot-shift)
- Mounting Type: 10-Bolt
- Transmission Compatibility: Allison automatic transmissions
- Continuous Torque Rating (series): 390 lb-ft / 529 Nm
- Output Types Available (series): SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Continuous Operation: Yes
- Part Number: 281GMFJW-B5RY or 281GMFJWB5RY
