The Chelsea 281GGFJW-B5RS or 281GGFJWB5RS is a 281 Series hydraulically shifted hot-shift power take-off designed for Allison and Caterpillar automatic transmissions with a 10-bolt aperture. The series delivers a continuous torque rating up to 390 lb-ft and supports nine speed ratios spanning low and high speeds. Key construction upgrades over the earlier 280 Series include 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% increase in clutch-pack steel disc thickness to resist premature tooth wear. The wet spline lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement, and the Electronic Overspeed Control (EOC) safeguards driven equipment. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile iron bearing cap is 117% stronger than gray iron for extended service life
O-ring sealing between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel discs resists premature tooth wear
Nine speed ratios available, including low and high speeds, for flexible application matching
Wet spline lubrication option provides 7 to 10 times greater output shaft life
Electronic Overspeed Control (EOC) and SmartStart protect driven equipment at engagement
Tech Specs
- Mounting Type: 10-Bolt aperture for Allison and Caterpillar automatic transmissions
- Shift Type: PowerShift (Hydraulic hot-shift)
- Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application page
- Output Options: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Speed Ratios: Nine, including low and high
- Lubrication: Pressure lube or wet spline options
- Continuous Operation: Yes
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
