281GMFJP-B8BD Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GMFJP-B8BD or 281GMFJPB8BD, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. It carries a single continuous-duty torque rating and offers nine speed ratios covering both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing vibrational effects from modern engine designs. The clutch pack features steel discs that are 80% thicker than the predecessor 280 Series design. Electronic Overspeed Control (EOC) and the SmartStart feature are included to protect driven equipment and reduce shock load at engagement. The hose is included with the unit. Call us to confirm proper fit for your application.

Features

Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures, including Allison applications
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with steel discs 80% thicker than the 280 Series design
Nine speed ratios available, spanning low and high speed ranges
Wet Spline Lubrication option extends shaft life 7 to 10 times; Positive Stop for driveline outputs eliminates oil seal damage; SmartStart reduces engagement shock load; Electronic Overspeed Control (EOC) protects driven equipment; hose included

Tech Specs

• Mounting Type: 10-Bolt aperture
• Shift Type: PowerShift - Hydraulic (hot-shift)
• Continuous Operation: Yes
• Continuous Torque: 390 lb-ft (529 Nm) - series rating; verify actual rating for your application
• Intermittent Torque: 301 to 400 lb-ft range
• 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)
• Speed Ratios: Nine ratios including low and high speeds
• Compatible Transmissions: Allison, Caterpillar (10-bolt aperture)
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Lubrication: Pressure Lube (P) and Wet Spline (W) options
• Part Number: 281GMFJP-B8BD or 281GMFJPB8BD

Additional Information

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.