The Chelsea 281GBFJP-B3RB or 281GBFJPB3RB is a 281 Series Power Take-Off built for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. This is a hydraulic PowerShift (hot shift) PTO designed for continuous operation. The series carries a continuous torque rating of 390 lb-ft and supports output types including SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline outputs. Nine speed ratios cover both low and high-speed applications. The ductile iron bearing cap is 117% stronger than gray iron, and an 80% thicker steel clutch pack resists premature tooth wear. Electronic Overspeed Control (EOC) and the SmartStart feature are available for load-sensitive applications. Pro Gear and Transmission is your source for genuine Chelsea PTOs - call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot shift) operation designed for 10-bolt automatic transmission apertures, commonly Allison
Continuous torque rating: 390 lb-ft (529 Nm) across nine speed ratios including low and high speeds
Ductile iron bearing cap rated 117% stronger than gray iron for improved durability
80% thicker steel discs in the clutch pack to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart option reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic), Hot Shift
- Continuous Operation: Yes
- Continuous Torque: 390 lb-ft (529 Nm)
- Transmission Manufacturer: Allison
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: SAE B (7/8 in. - 13T) Pump Spline, SAE C (1-1/4 in. - 14T) Pump Spline, 3/4 in. - 11T Pump Spline, SmartStart Round Shaft (1-1/4 in. - 5/16 in. Key), 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange, DIN 5462 Pump Spline
- Speed Ratios: Nine (including low and high speeds)
- Lubricant Options: Pressure Lube (P), Wet Spline (W)
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Series: Chelsea 281
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
